Update the CHANGELOG.

CHANGELOG.md

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+# Change Log
+
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+## [Unreleased]
+
+## [0.13.2] - 2023-30-18
+
+### Changed
+- Update the README.
+- Update the version.
+- Update the CHANGELOG.
+
+## [0.13.1] - 2023-30-18
+
+### Changed
+- Add the license, LGPLv3.
+
+## [0.13.0] - 2023-30-18
+
+### Added
+- Add validators to show error if a test method is invalid.
+- Add a Calculator and its tests.
+- Add the invalid tests.
+- Add the tests for test validators.
+
+### Fixed
+- Fix the given-when-then tests to have public methods.
+- Fix the test count for ClassLoader's test.
+
+### Changed
+- Update the block to run only a public method.
+- Update the TestCommandFactory to have the validators.
+
+## [0.12.7] - 2023-30-16
+
+### Added
+- Add the CHANGELOG.
+
+## [0.12.6] - 2023-30-16
+
+### Fixed
+- Fix the project name for the gradle build.
+
+## [0.12.5] - 2023-30-15
+
+### Changed
+- Update the build configuration to make the JAR file.
+
+## [0.12.4] - 2023-30-15
+
+### Added
+- Add SimpleEmptyTest and its tests.
+
+## [0.12.3] - 2023-30-15
+
+### Added
+- Add the error for an empty test.
+
+## [0.12.2] - 2023-30-15
+
+### Changed
+- Update the titles for SimpleFailedThenTest and SimpleGivenWhenThenTest.
+
+## [0.12.1] - 2023-30-15
+
+### Added
+- Add a multi-block test.
+
+### Changed
+- Update the tests to test the multi-block test.
+
+## [0.12.0] - 2023-30-15
+
+### Added
+- Add the multi-block tests support.
+
+## [0.11.2] - 2023-30-10
+
+### Added
+- Add the main entry point.
+
+## [0.11.1] - 2023-30-10
+
+### Added
+- Add a constructor to set only a formatter for CLIReporter.
+
+## [0.11.0] - 2023-30-10
+
+### Added
+- Add the CLITestRunner to run tests and to report the result.
+
+## [0.10.1] - 2023-30-10
+
+### Changed
+- Update the CLI test formatting.
+
+## [0.10.0] - 2023-30-8
+
+### Added
+- Add the SingleTestLoader to create an object of a loaded Test class.
+
+## [0.9.2] - 2023-30-8
+
+### Added
+- Add a constructor with a default factory for TestCommandQueueFactory.
+
+## [0.9.1] - 2023-30-8
+
+### Fixed
+- Fix the test title for SingleTestClassLoader.
+
+## [0.9.0] - 2023-30-7
+
+### Added
+- Add the AbstractReporter.
+- Add the CLIReporter and its tests.
+
+## [0.8.3] - 2023-30-7
+
+### Added
+- Add Apache Commons Lang library.
+- Add default constructor for SimpleTestReportFormatter.
+
+## [0.8.2] - 2023-30-6
+
+### Added
+- Add the AbstractTestReportFormatter.
+
+### Changed
+- Refactor the SimpleTestReportFormatter to use the interface.
+
+## [0.8.1] - 2023-30-6
+
+### Fixed
+- Fix the encoding issue.
+
+## [0.8.0] - 2023-30-4
+
+### Added
+- Add the SimpleTestReportFormatter.
+
+## [0.7.0] - 2023-30-3
+
+### Added
+- Add the TestCommandMetaDataFactory to generate the metadata.
+
+## [0.6.3] - 2023-30-1
+
+### Added
+- Add the ClassLoader.
+
+## [0.6.2] - 2023-30-1
+
+### Fixed
+- Fix typos and improve description in the tests.
+
+## [0.6.1] - 2023-09-30
+
+### Added
+- Add the com.google.guava as a dependency.
+- Add the NameClassLoader.
+
+## [0.6.0] - 2023-09-29
+
+### Added
+- Add the single class loader.
+
+## [0.5.4] - 2023-09-27
+
+### Added
+- Add the queue factory for test commands.
+
+## [0.5.3] - 2023-09-26
+
+### Added
+- Add Abstract and Simple factories to create a test runner.
+
+## [0.5.2] - 2023-09-26
+
+### Changed
+- Refactor tests for the SimpleTestRunner.
+- Refactor the SimpleTestRunner and its test.
+
+## [0.5.1] - 2023-09-24
+
+### Fixed
+- Fix the BlockDecorator to throw the AsssertionError, if any.
+
+## [0.5.0] - 2023-09-24
+
+### Added
+- Add SimpleTestRunner as a test runner.
+
+## [0.4.1] - 2023-09-23
+
+### Added
+- Add the CI/CD configuration for Gradle and Maven build.
+
+## [0.4.0] - 2023-09-23
+
+### Added
+- Add the create method for the TestCommandFactory.
+
+## [0.3.1] - 2023-09-23
+
+### Added
+- Add the test block decorator.
+
+## [0.3.0] - 2023-09-23
+
+### Added
+- Add abstract and simple test commands.
+
+## [0.2.7] - 2023-09-23
+
+### Added
+- Add a test example without a title annotation.
+
+## [0.2.6] - 2023-09-23
+
+### Changed
+- Update test examples to have annotations with values.
+
+## [0.2.5] - 2023-09-23
+
+### Added
+- Add the Title annotation.
+
+## [0.2.4] - 2023-09-20
+
+### Added
+- Add the TestCommandFactory with a getTestMethods.
+
+## [0.2.3] - 2023-09-20
+
+### Added
+- Add the Test class as ABC.
+
+## [0.2.2] - 2023-09-20
+
+### Added
+- Add test examples.
+
+## [0.2.1] - 2023-09-20
+
+### Changed
+- Refactor the Sum class to be moved into the samples package.
+
+## [0.2.0] - 2023-09-19
+
+### Added
+- Add the Given-When-Then annotations.
+
+## [0.1.2] - 2023-09-19
+
+### Removed
+- Remove the test examples.
+
+## [0.1.1] - 2023-09-19
+
+### Added
+- Add the Sum class to test as an example.
+
+## [0.1.0] - 2023-09-19
+
+### Added
+- Project initialization.
+
+[Unreleased]: https://gitlab.com/KKlochko/cipher-analytical-machine/-/compare/0.5.3...main?from_project_id=50218541&straight=false
+: https://gitlab.com/KKlochko/simple-jbdd/-/compare/0.12.7...main?from_project_id=50536015&straight=false
+[0.12.7]: https://gitlab.com/KKlochko/simple-jbdd/-/compare/0.12.6...0.12.7?from_project_id=50536015&straight=false
+[0.12.6]: https://gitlab.com/KKlochko/simple-jbdd/-/compare/0.12.5...0.12.6?from_project_id=50536015&straight=false
+[0.12.5]: https://gitlab.com/KKlochko/simple-jbdd/-/compare/0.12.4...0.12.5?from_project_id=50536015&straight=false
+[0.12.4]: https://gitlab.com/KKlochko/simple-jbdd/-/compare/0.12.3...0.12.4?from_project_id=50536015&straight=false
+[0.12.3]: https://gitlab.com/KKlochko/simple-jbdd/-/compare/0.12.2...0.12.3?from_project_id=50536015&straight=false
+[0.12.2]: https://gitlab.com/KKlochko/simple-jbdd/-/compare/0.12.1...0.12.2?from_project_id=50536015&straight=false
+[0.12.1]: https://gitlab.com/KKlochko/simple-jbdd/-/compare/0.12.0...0.12.1?from_project_id=50536015&straight=false
+[0.12.0]: https://gitlab.com/KKlochko/simple-jbdd/-/compare/0.11.2...0.12.0?from_project_id=50536015&straight=false
+[0.11.2]: https://gitlab.com/KKlochko/simple-jbdd/-/compare/0.11.1...0.11.2?from_project_id=50536015&straight=false
+[0.11.1]: https://gitlab.com/KKlochko/simple-jbdd/-/compare/0.11.0...0.11.1?from_project_id=50536015&straight=false
+[0.11.0]: https://gitlab.com/KKlochko/simple-jbdd/-/compare/0.10.1...0.11.0?from_project_id=50536015&straight=false
+[0.10.1]: https://gitlab.com/KKlochko/simple-jbdd/-/compare/0.10.0...0.10.1?from_project_id=50536015&straight=false
+[0.10.0]: https://gitlab.com/KKlochko/simple-jbdd/-/compare/0.9.2...0.10.0?from_project_id=50536015&straight=false
+[0.9.2]: https://gitlab.com/KKlochko/simple-jbdd/-/compare/0.9.1...0.9.2?from_project_id=50536015&straight=false
+[0.9.1]: https://gitlab.com/KKlochko/simple-jbdd/-/compare/0.9.0...0.9.1?from_project_id=50536015&straight=false
+[0.9.0]: https://gitlab.com/KKlochko/simple-jbdd/-/compare/0.8.3...0.9.0?from_project_id=50536015&straight=false
+[0.8.3]: https://gitlab.com/KKlochko/simple-jbdd/-/compare/0.8.2...0.8.3?from_project_id=50536015&straight=false
+[0.8.2]: https://gitlab.com/KKlochko/simple-jbdd/-/compare/0.8.1...0.8.2?from_project_id=50536015&straight=false
+[0.8.1]: https://gitlab.com/KKlochko/simple-jbdd/-/compare/0.8.0...0.8.1?from_project_id=50536015&straight=false
+[0.8.0]: https://gitlab.com/KKlochko/simple-jbdd/-/compare/0.7.0...0.8.0?from_project_id=50536015&straight=false
+[0.7.0]: https://gitlab.com/KKlochko/simple-jbdd/-/compare/0.6.3...0.7.0?from_project_id=50536015&straight=false
+[0.6.3]: https://gitlab.com/KKlochko/simple-jbdd/-/compare/0.6.2...0.6.3?from_project_id=50536015&straight=false
+[0.6.2]: https://gitlab.com/KKlochko/simple-jbdd/-/compare/0.6.1...0.6.2?from_project_id=50536015&straight=false
+[0.6.1]: https://gitlab.com/KKlochko/simple-jbdd/-/compare/0.6.0...0.6.1?from_project_id=50536015&straight=false
+[0.6.0]: https://gitlab.com/KKlochko/simple-jbdd/-/compare/0.5.4...0.6.0?from_project_id=50536015&straight=false
+[0.5.4]: https://gitlab.com/KKlochko/simple-jbdd/-/compare/0.5.3...0.5.4?from_project_id=50536015&straight=false
+[0.5.3]: https://gitlab.com/KKlochko/simple-jbdd/-/compare/0.5.2...0.5.3?from_project_id=50536015&straight=false
+[0.5.2]: https://gitlab.com/KKlochko/simple-jbdd/-/compare/0.5.1...0.5.2?from_project_id=50536015&straight=false
+[0.5.1]: https://gitlab.com/KKlochko/simple-jbdd/-/compare/0.5.0...0.5.1?from_project_id=50536015&straight=false
+[0.5.0]: https://gitlab.com/KKlochko/simple-jbdd/-/compare/0.4.1...0.5.0?from_project_id=50536015&straight=false
+[0.4.1]: https://gitlab.com/KKlochko/simple-jbdd/-/compare/0.4.0...0.4.1?from_project_id=50536015&straight=false
+[0.4.0]: https://gitlab.com/KKlochko/simple-jbdd/-/compare/0.3.1...0.4.0?from_project_id=50536015&straight=false
+[0.3.1]: https://gitlab.com/KKlochko/simple-jbdd/-/compare/0.3.0...0.3.1?from_project_id=50536015&straight=false
+[0.3.0]: https://gitlab.com/KKlochko/simple-jbdd/-/compare/0.2.7...0.3.0?from_project_id=50536015&straight=false
+[0.2.7]: https://gitlab.com/KKlochko/simple-jbdd/-/compare/0.2.6...0.2.7?from_project_id=50536015&straight=false
+[0.2.6]: https://gitlab.com/KKlochko/simple-jbdd/-/compare/0.2.5...0.2.6?from_project_id=50536015&straight=false
+[0.2.5]: https://gitlab.com/KKlochko/simple-jbdd/-/compare/0.2.4...0.2.5?from_project_id=50536015&straight=false
+[0.2.4]: https://gitlab.com/KKlochko/simple-jbdd/-/compare/0.2.3...0.2.4?from_project_id=50536015&straight=false
+[0.2.3]: https://gitlab.com/KKlochko/simple-jbdd/-/compare/0.2.2...0.2.3?from_project_id=50536015&straight=false
+[0.2.2]: https://gitlab.com/KKlochko/simple-jbdd/-/compare/0.2.1...0.2.2?from_project_id=50536015&straight=false
+[0.2.1]: https://gitlab.com/KKlochko/simple-jbdd/-/compare/0.2.0...0.2.1?from_project_id=50536015&straight=false
+[0.2.0]: https://gitlab.com/KKlochko/simple-jbdd/-/compare/0.1.2...0.2.0?from_project_id=50536015&straight=false
+[0.1.2]: https://gitlab.com/KKlochko/simple-jbdd/-/compare/0.1.1...0.1.2?from_project_id=50536015&straight=false
+[0.1.1]: https://gitlab.com/KKlochko/simple-jbdd/-/compare/0.1.0...0.1.1?from_project_id=50536015&straight=false
+[0.1.0]: https://gitlab.com/KKlochko/simple-jbdd/-/commit/dabb09c518cdfad4aa05ac9d86c857833b8db41c

COPYING

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+                    GNU GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
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+Public License instead of this License.  But first, please read
+<https://www.gnu.org/licenses/why-not-lgpl.html>.

COPYING.LESSER

@@ -0,0 +1,165 @@
+                   GNU LESSER GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
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+  This version of the GNU Lesser General Public License incorporates
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+permanent authorization for you to choose that version for the
+Library.

LICENSE

@@ -1,202 +0,0 @@
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README.adoc

@@ -1,27 +0,0 @@
-
-== simple-jbdd
-
-This project is a simple BDD framework.
-
-The project uses the https://github.com/spockframework/[Spock Framework Example Project^]
-
-=== Prerequisites
-
-- JDK 17 or higher
-- Maven use `mvnw` wrapper
-- Gradle use `gradlew` wrapper
-
-=== Building with Gradle
-Type:
-
-    ./gradlew clean test
-
-Downloaded files (including the Gradle distribution itself) will be stored in the Gradle user home directory (typically *user_home*`/.gradle`).
-
-=== Building with Maven
-Type:
-
-    ./mvnw clean test
-
-Downloaded files will be stored in the local Maven repository (typically *user_home*`/.m2/repository`).
-

README.md

@@ -0,0 +1,67 @@
+# simple-jbdd
+
+This project is a simple BDD framework.
+
+The project uses the [Spock Framework Example Project](https://github.com/spockframework/)
+
+## Prerequisites
+
+- JDK 17 or higher
+
+- Maven use `mvnw` wrapper
+
+- Gradle use `gradlew` wrapper
+
+## Building with Gradle
+
+Downloaded files (including the Gradle distribution itself) will be stored in the Gradle user home directory (typically **user_home**`/.gradle`).
+
+Type: test
+
+```shell
+./gradlew clean test
+```
+
+Type: build
+
+```shell
+./gradlew clean build
+```
+
+Type: run with asserts
+
+```shell
+java -ea -jar ./build/libs/simple_jbdd-0.13.2-all.jar
+```
+
+## Building with Maven
+
+Downloaded files will be stored in the local Maven repository (typically **user_home**`/.m2/repository`).
+
+Type: test
+
+```shell
+./mvnw clean test
+```
+
+Type: build
+
+
+```shell
+./mvnw clean package
+```
+
+Type: run with asserts
+
+```shell
+java -ea -jar ./target/simple_jbdd-0.13.2.jar
+```
+
+## Building with Maven
+
+Kostiantyn Klochko (c) 2023
+
+## License
+
+Under the GNU Lesser General Public License v3.0 or later.
+

build.gradle

@@ -1,17 +1,31 @@
 plugins {
     id('groovy')
+    id('application')
+    id 'com.github.johnrengelman.shadow' version '7.1.2'
 }
 
-version = "1.0"
+version = "0.13.2"
 description = "simple-jbdd is a simple BDD testing framework for Java."
 
-// Spock works with Java 1.8 and above
+application {
+    mainClassName = 'space.kklochko.simple_jbdd.Main'
+}
+
+shadowJar {
+    mergeServiceFiles()
+    minimize()
+}
+
 java {
     toolchain {
         languageVersion.set(JavaLanguageVersion.of(17))
     }
 }
 
+compileJava {
+    options.encoding = 'UTF-8'
+}
+
 repositories {
   // Spock releases are available from Maven Central
   mavenCentral()
@@ -19,6 +33,7 @@ repositories {
 
 dependencies {
   implementation 'com.google.guava:guava:32.1.2-jre'
+  implementation 'org.apache.commons:commons-lang3:3.13.0'
   // mandatory dependencies for using Spock
   implementation platform('org.apache.groovy:groovy-bom:4.0.15')
   implementation 'org.apache.groovy:groovy'

pom.xml

@@ -4,7 +4,7 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>space.kklochko</groupId>
   <artifactId>simple_jbdd</artifactId>
-  <version>1.0-SNAPSHOT</version>
+  <version>0.13.2</version>
   <packaging>jar</packaging>
   <name>simple-jbdd</name>
 
@@ -18,6 +18,32 @@
 
   <build>
     <plugins>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-jar-plugin</artifactId>
+        <version>3.2.2</version>
+        <configuration>
+          <archive>
+            <manifest>
+              <mainClass>space.kklochko.simple_jbdd.Main</mainClass>
+              <addClasspath>true</addClasspath>
+            </manifest>
+          </archive>
+        </configuration>
+      </plugin>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-shade-plugin</artifactId>
+        <version>3.4.1</version>
+        <executions>
+          <execution>
+            <phase>package</phase>
+            <goals>
+              <goal>shade</goal>
+            </goals>
+          </execution>
+        </executions>
+      </plugin>
       <!-- Mandatory plugins for using Spock -->
       <plugin>
         <!-- The gmavenplus plugin is used to compile Groovy code. To learn more about this plugin,
@@ -84,6 +110,11 @@
       <artifactId>guava</artifactId>
       <version>32.1.2-jre</version>
     </dependency>
+    <dependency>
+      <groupId>org.apache.commons</groupId>
+      <artifactId>commons-lang3</artifactId>
+      <version>3.13.0</version>
+    </dependency>
     <!-- Mandatory dependencies for using Spock -->
     <dependency>
       <groupId>org.spockframework</groupId>
@@ -119,16 +150,5 @@
       <version>2.2</version>
       <scope>test</scope>
     </dependency>
-    <!-- Dependencies used by examples in this project (not required for using Spock) -->
-    <dependency>
-      <groupId>com.h2database</groupId>
-      <artifactId>h2</artifactId>
-      <version>2.2.222</version>
-    </dependency>
-    <dependency>
-      <groupId>org.apache.groovy</groupId>
-      <artifactId>groovy-sql</artifactId>
-      <version>${groovy.version}</version>
-    </dependency>
   </dependencies>
 </project>

settings.gradle

@@ -1 +1 @@
-rootProject.name = "simple_bdd"
+rootProject.name = "simple_jbdd"

src/main/java/space/kklochko/simple_jbdd/Main.java

@@ -0,0 +1,24 @@
+package space.kklochko.simple_jbdd;
+
+import space.kklochko.simple_jbdd.tests.factories.AbstractTestRunnerFactory;
+import space.kklochko.simple_jbdd.tests.factories.SimpleTestRunnerFactory;
+import space.kklochko.simple_jbdd.tests.loaders.NameClassLoader;
+import space.kklochko.simple_jbdd.tests.reports.AbstractReporter;
+import space.kklochko.simple_jbdd.tests.reports.CLIReporter;
+import space.kklochko.simple_jbdd.tests.reports.fmt.SimpleTestReportFormatter;
+import space.kklochko.simple_jbdd.tests.runners.CLITestRunner;
+
+public class Main {
+    public static void main(String[] args) {
+        NameClassLoader loader = new NameClassLoader();
+        AbstractTestRunnerFactory testRunnerFactory = new SimpleTestRunnerFactory();
+        AbstractReporter reporter = new CLIReporter(new SimpleTestReportFormatter());
+
+        CLITestRunner runner = new CLITestRunner(loader, testRunnerFactory, reporter);
+
+        boolean status = runner.run();
+
+        System.exit(status ? 0 : 1);
+    }
+}
+

src/main/java/space/kklochko/simple_jbdd/test_examples/samples/Calculator.java

@@ -0,0 +1,16 @@
+package space.kklochko.simple_jbdd.test_examples.samples;
+
+public class Calculator {
+    public int plus(int a, int b) {
+        return a + b;
+    }
+
+    public int subtract(int a, int b) {
+        return a - b;
+    }
+
+    public int multiply(int a, int b) {
+        return a * b + 1;
+    }
+}
+

src/main/java/space/kklochko/simple_jbdd/test_examples/tests/CalculatorMultiplyTest.java

@@ -0,0 +1,38 @@
+package space.kklochko.simple_jbdd.test_examples.tests;
+
+import space.kklochko.simple_jbdd.annotations.Given;
+import space.kklochko.simple_jbdd.annotations.Then;
+import space.kklochko.simple_jbdd.annotations.Title;
+import space.kklochko.simple_jbdd.annotations.When;
+import space.kklochko.simple_jbdd.test_examples.samples.Calculator;
+import space.kklochko.simple_jbdd.tests.Test;
+
+@Title("3*3 must be 9")
+public class CalculatorMultiplyTest extends Test {
+    Calculator calculator;
+    int a;
+    int b;
+    int result;
+
+    @Given("Set up the calculator")
+    public void given() {
+        calculator = new Calculator();
+    }
+
+    @Given("Set up the arguments")
+    public void setupArguments() {
+        a = 3;
+        b = 3;
+    }
+
+    @When("Invoke the multiply method")
+    public void when() {
+        result = calculator.multiply(a, b);
+    }
+
+    @Then("3*3 must be 9")
+    public void then() {
+        assert result == 9;
+    }
+}
+

src/main/java/space/kklochko/simple_jbdd/test_examples/tests/CalculatorPlusTest.java

@@ -0,0 +1,37 @@
+package space.kklochko.simple_jbdd.test_examples.tests;
+
+import space.kklochko.simple_jbdd.annotations.Given;
+import space.kklochko.simple_jbdd.annotations.Then;
+import space.kklochko.simple_jbdd.annotations.Title;
+import space.kklochko.simple_jbdd.annotations.When;
+import space.kklochko.simple_jbdd.test_examples.samples.Calculator;
+import space.kklochko.simple_jbdd.tests.Test;
+
+@Title("2+2 must be 4")
+public class CalculatorPlusTest extends Test {
+    Calculator calculator;
+    int a;
+    int b;
+    int result;
+
+    @Given("Set up the calculator")
+    public void given() {
+        calculator = new Calculator();
+    }
+
+    @Given("Set up the arguments")
+    public void setupArguments() {
+        a = b = 2;
+    }
+
+    @When("Invoke the plus method")
+    public void when() {
+        result = calculator.plus(a, b);
+    }
+
+    @Then("2+2 must be 4")
+    public void then() {
+        assert result == 4;
+    }
+}
+

src/main/java/space/kklochko/simple_jbdd/test_examples/tests/CalculatorSubtractTes.java

@@ -0,0 +1,38 @@
+package space.kklochko.simple_jbdd.test_examples.tests;
+
+import space.kklochko.simple_jbdd.annotations.Given;
+import space.kklochko.simple_jbdd.annotations.Then;
+import space.kklochko.simple_jbdd.annotations.Title;
+import space.kklochko.simple_jbdd.annotations.When;
+import space.kklochko.simple_jbdd.test_examples.samples.Calculator;
+import space.kklochko.simple_jbdd.tests.Test;
+
+@Title("4-2 must be 2")
+public class CalculatorSubtractTes extends Test {
+    Calculator calculator;
+    int a;
+    int b;
+    int result;
+
+    @Given("Set up the calculator")
+    public void given() {
+        calculator = new Calculator();
+    }
+
+    @Given("Set up the arguments")
+    public void setupArguments() {
+        a = 4;
+        b = 2;
+    }
+
+    @When("Invoke the subtract method")
+    public void when() {
+        result = calculator.subtract(a, b);
+    }
+
+    @Then("4-2 must be 2")
+    public void then() {
+        assert result == 2;
+    }
+}
+

src/main/java/space/kklochko/simple_jbdd/test_examples/tests/CalculatorSubtractTest.java

@@ -0,0 +1,38 @@
+package space.kklochko.simple_jbdd.test_examples.tests;
+
+import space.kklochko.simple_jbdd.annotations.Given;
+import space.kklochko.simple_jbdd.annotations.Then;
+import space.kklochko.simple_jbdd.annotations.Title;
+import space.kklochko.simple_jbdd.annotations.When;
+import space.kklochko.simple_jbdd.test_examples.samples.Calculator;
+import space.kklochko.simple_jbdd.tests.Test;
+
+@Title("4-2 must be 2")
+public class CalculatorSubtractTest extends Test {
+    Calculator calculator;
+    int a;
+    int b;
+    int result;
+
+    @Given("Set up the calculator")
+    public void given() {
+        calculator = new Calculator();
+    }
+
+    @Given("Set up the arguments")
+    public void setupArguments() {
+        a = 4;
+        b = 2;
+    }
+
+    @When("Invoke the subtract method")
+    public void when() {
+        result = calculator.subtract(a, b);
+    }
+
+    @Then("4-2 must be 2")
+    public void then() {
+        assert result == 2;
+    }
+}
+

src/main/java/space/kklochko/simple_jbdd/test_examples/tests/HasMethodArgumentsTest.java

@@ -0,0 +1,38 @@
+package space.kklochko.simple_jbdd.test_examples.tests;
+
+import space.kklochko.simple_jbdd.annotations.Given;
+import space.kklochko.simple_jbdd.annotations.Then;
+import space.kklochko.simple_jbdd.annotations.Title;
+import space.kklochko.simple_jbdd.annotations.When;
+import space.kklochko.simple_jbdd.test_examples.samples.Calculator;
+import space.kklochko.simple_jbdd.tests.Test;
+
+@Title("Test that has method arguments")
+public class HasMethodArgumentsTest extends Test {
+    Calculator calculator;
+    int a;
+    int b;
+    int result;
+
+    @Given("Set up the calculator in a private method")
+    public void given(int a, int b) {
+        calculator = new Calculator();
+    }
+
+    @Given("Set up the arguments with arguments")
+    public void setupArguments(int a, int b) {
+        this.a = 4;
+        this.b = 2;
+    }
+
+    @When("Invoke the subtract method")
+    public void when() {
+        result = calculator.subtract(a, b);
+    }
+
+    @Then("4-2 must be 2 and return Bool value")
+    public void then() {
+        assert result == 2;
+    }
+}
+

src/main/java/space/kklochko/simple_jbdd/test_examples/tests/HasNonVoidMethodTest.java

@@ -0,0 +1,39 @@
+package space.kklochko.simple_jbdd.test_examples.tests;
+
+import space.kklochko.simple_jbdd.annotations.Given;
+import space.kklochko.simple_jbdd.annotations.Then;
+import space.kklochko.simple_jbdd.annotations.Title;
+import space.kklochko.simple_jbdd.annotations.When;
+import space.kklochko.simple_jbdd.test_examples.samples.Calculator;
+import space.kklochko.simple_jbdd.tests.Test;
+
+@Title("Test with a method that return boolean")
+public class HasNonVoidMethodTest extends Test {
+    Calculator calculator;
+    int a;
+    int b;
+    int result;
+
+    @Given("Set up the calculator in a private method")
+    public void given() {
+        calculator = new Calculator();
+    }
+
+    @Given("Set up the arguments")
+    public void setupArguments() {
+        this.a = 4;
+        this.b = 2;
+    }
+
+    @When("Invoke the subtract method")
+    public void when() {
+        result = calculator.subtract(a, b);
+    }
+
+    @Then("4-2 must be 2 and return result")
+    public boolean then() {
+        assert result == 2;
+        return result != 2;
+    }
+}
+

src/main/java/space/kklochko/simple_jbdd/test_examples/tests/HasPrivateMethodTest.java

@@ -0,0 +1,38 @@
+package space.kklochko.simple_jbdd.test_examples.tests;
+
+import space.kklochko.simple_jbdd.annotations.Given;
+import space.kklochko.simple_jbdd.annotations.Then;
+import space.kklochko.simple_jbdd.annotations.Title;
+import space.kklochko.simple_jbdd.annotations.When;
+import space.kklochko.simple_jbdd.test_examples.samples.Calculator;
+import space.kklochko.simple_jbdd.tests.Test;
+
+@Title("Test with a private method")
+public class HasPrivateMethodTest extends Test {
+    Calculator calculator;
+    int a;
+    int b;
+    int result;
+
+    @Given("Set up the calculator in a private method")
+    private void given() {
+        calculator = new Calculator();
+    }
+
+    @Given("Set up the arguments")
+    public void setupArguments() {
+        this.a = 4;
+        this.b = 2;
+    }
+
+    @When("Invoke the subtract method")
+    public void when() {
+        result = calculator.subtract(a, b);
+    }
+
+    @Then("4-2 must be 2")
+    public void then() {
+        assert result == 2;
+    }
+}
+

src/main/java/space/kklochko/simple_jbdd/test_examples/tests/SimpleEmptyTest.java

@@ -0,0 +1,12 @@
+package space.kklochko.simple_jbdd.test_examples.tests;
+
+import space.kklochko.simple_jbdd.annotations.Title;
+import space.kklochko.simple_jbdd.tests.Test;
+
+@Title("A Simple Empty Test for Sum")
+public class SimpleEmptyTest extends Test {
+    public void check() {
+        assert 30 == 10 + 20 + 1;
+    }
+}
+

src/main/java/space/kklochko/simple_jbdd/test_examples/tests/SimpleFailedThenTest.java

@@ -5,7 +5,7 @@ import space.kklochko.simple_jbdd.annotations.Title;
 import space.kklochko.simple_jbdd.tests.Test;
 
 
-@Title("A Simple Failed GivenWhenTest for Sum")
+@Title("A Simple Failed Then Test for Sum")
 public class SimpleFailedThenTest extends Test {
     @Then
     public void check() {

src/main/java/space/kklochko/simple_jbdd/test_examples/tests/SimpleGivenGivenWhenWhenThenThenTest.java

@@ -0,0 +1,51 @@
+package space.kklochko.simple_jbdd.test_examples.tests;
+
+import space.kklochko.simple_jbdd.annotations.Given;
+import space.kklochko.simple_jbdd.annotations.Then;
+import space.kklochko.simple_jbdd.annotations.Title;
+import space.kklochko.simple_jbdd.annotations.When;
+import space.kklochko.simple_jbdd.test_examples.samples.Sum;
+import space.kklochko.simple_jbdd.tests.Test;
+
+@Title("A Simple GivenGivenWhenWhenThenThen Test for Sum")
+public class SimpleGivenGivenWhenWhenThenThenTest extends Test {
+    private Sum sum;
+    private int a;
+    private int b;
+    private int c;
+    private int resultAB;
+    private int resultCB;
+
+    @Given("Create the Sum object")
+    public void setup() {
+        sum = new Sum();
+    }
+
+    @Given("Setup the arguments")
+    public void setupArgs() {
+        a = 10;
+        b = 20;
+        c = 30;
+    }
+
+    @When("Call the .sum(10, 20)")
+    public void triggerAB() {
+        resultAB = sum.sum(a, b);
+    }
+
+    @When("Call the .sum(30, 20)")
+    public void triggerCB() {
+        resultCB = sum.sum(c, b);
+    }
+
+    @Then("10 + 20 is 30")
+    public void checkAB() {
+        assert 30 == resultAB;
+    }
+
+    @Then("30 + 20 is 50")
+    public void checkCB() {
+        assert 50 == resultCB;
+    }
+}
+

src/main/java/space/kklochko/simple_jbdd/test_examples/tests/SimpleGivenWhenThenTest.java

@@ -7,25 +7,25 @@ import space.kklochko.simple_jbdd.annotations.When;
 import space.kklochko.simple_jbdd.test_examples.samples.Sum;
 import space.kklochko.simple_jbdd.tests.Test;
 
-@Title("A Simple GivenWhenTest for Sum")
+@Title("A Simple GivenWhenThen Test for Sum")
 public class SimpleGivenWhenThenTest extends Test {
     private Sum sum;
     private int a;
     private int b;
 
     @Given
-    void setup() {
+    public void setup() {
         sum = new Sum();
     }
 
     @When
-    void trigger() {
+    public void trigger() {
         a = 10;
         b = 20;
     }
 
     @Then
-    void check() {
+    public void check() {
         assert 30 == sum.sum(a, b);
     }
 }

src/main/java/space/kklochko/simple_jbdd/tests/commands/AbstractTestCommand.java

@@ -1,3 +1,22 @@
+//////////////////////////////////////////////////////////////////////////////////
+// Copyright (C) 2023 Kostiantyn Klochko <kklochko@protonmail.com>              //
+//                                                                              //
+// This file is part of simple-jbdd.                                            //
+//                                                                              //
+// simple-jbdd is free software: you can redistribute it and/or modify it under //
+// the terms of the GNU Lesser General Public License as published by the Free  //
+// Software Foundation, either version 3 of the License, or (at your option)    //
+// any later version.                                                           //
+//                                                                              //
+// simple-jbdd is distributed in the hope that it will be useful, but WITHOUT   //
+// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or        //
+// FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License  //
+// for more details.                                                            //
+//                                                                              //
+// You should have received a copy of the GNU Lesser General Public License     //
+// along with simple-jbdd. If not, see <https://www.gnu.org/licenses/>.         //
+//////////////////////////////////////////////////////////////////////////////////
+
 package space.kklochko.simple_jbdd.tests.commands;
 
 import space.kklochko.simple_jbdd.tests.Test;

src/main/java/space/kklochko/simple_jbdd/tests/commands/SimpleTestCommand.java

@@ -1,3 +1,22 @@
+//////////////////////////////////////////////////////////////////////////////////
+// Copyright (C) 2023 Kostiantyn Klochko <kklochko@protonmail.com>              //
+//                                                                              //
+// This file is part of simple-jbdd.                                            //
+//                                                                              //
+// simple-jbdd is free software: you can redistribute it and/or modify it under //
+// the terms of the GNU Lesser General Public License as published by the Free  //
+// Software Foundation, either version 3 of the License, or (at your option)    //
+// any later version.                                                           //
+//                                                                              //
+// simple-jbdd is distributed in the hope that it will be useful, but WITHOUT   //
+// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or        //
+// FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License  //
+// for more details.                                                            //
+//                                                                              //
+// You should have received a copy of the GNU Lesser General Public License     //
+// along with simple-jbdd. If not, see <https://www.gnu.org/licenses/>.         //
+//////////////////////////////////////////////////////////////////////////////////
+
 package space.kklochko.simple_jbdd.tests.commands;
 
 import space.kklochko.simple_jbdd.tests.Test;

src/main/java/space/kklochko/simple_jbdd/tests/commands/decorators/AbstractDecorator.java

@@ -1,3 +1,22 @@
+//////////////////////////////////////////////////////////////////////////////////
+// Copyright (C) 2023 Kostiantyn Klochko <kklochko@protonmail.com>              //
+//                                                                              //
+// This file is part of simple-jbdd.                                            //
+//                                                                              //
+// simple-jbdd is free software: you can redistribute it and/or modify it under //
+// the terms of the GNU Lesser General Public License as published by the Free  //
+// Software Foundation, either version 3 of the License, or (at your option)    //
+// any later version.                                                           //
+//                                                                              //
+// simple-jbdd is distributed in the hope that it will be useful, but WITHOUT   //
+// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or        //
+// FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License  //
+// for more details.                                                            //
+//                                                                              //
+// You should have received a copy of the GNU Lesser General Public License     //
+// along with simple-jbdd. If not, see <https://www.gnu.org/licenses/>.         //
+//////////////////////////////////////////////////////////////////////////////////
+
 package space.kklochko.simple_jbdd.tests.commands.decorators;
 
 import space.kklochko.simple_jbdd.tests.Test;

src/main/java/space/kklochko/simple_jbdd/tests/commands/decorators/BlockDecorator.java

@@ -1,3 +1,22 @@
+//////////////////////////////////////////////////////////////////////////////////
+// Copyright (C) 2023 Kostiantyn Klochko <kklochko@protonmail.com>              //
+//                                                                              //
+// This file is part of simple-jbdd.                                            //
+//                                                                              //
+// simple-jbdd is free software: you can redistribute it and/or modify it under //
+// the terms of the GNU Lesser General Public License as published by the Free  //
+// Software Foundation, either version 3 of the License, or (at your option)    //
+// any later version.                                                           //
+//                                                                              //
+// simple-jbdd is distributed in the hope that it will be useful, but WITHOUT   //
+// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or        //
+// FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License  //
+// for more details.                                                            //
+//                                                                              //
+// You should have received a copy of the GNU Lesser General Public License     //
+// along with simple-jbdd. If not, see <https://www.gnu.org/licenses/>.         //
+//////////////////////////////////////////////////////////////////////////////////
+
 package space.kklochko.simple_jbdd.tests.commands.decorators;
 
 import space.kklochko.simple_jbdd.tests.Test;
@@ -24,7 +43,6 @@ public class BlockDecorator<T extends Test> extends AbstractDecorator<T> {
 
     public boolean runMethod() {
         try {
-            method.setAccessible(true);
             method.invoke(getCommand().getObject());
             return true;
         } catch (InvocationTargetException e) {

src/main/java/space/kklochko/simple_jbdd/tests/commands/decorators/ErrorDecorator.java

@@ -0,0 +1,39 @@
+//////////////////////////////////////////////////////////////////////////////////
+// Copyright (C) 2023 Kostiantyn Klochko <kklochko@protonmail.com>              //
+//                                                                              //
+// This file is part of simple-jbdd.                                            //
+//                                                                              //
+// simple-jbdd is free software: you can redistribute it and/or modify it under //
+// the terms of the GNU Lesser General Public License as published by the Free  //
+// Software Foundation, either version 3 of the License, or (at your option)    //
+// any later version.                                                           //
+//                                                                              //
+// simple-jbdd is distributed in the hope that it will be useful, but WITHOUT   //
+// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or        //
+// FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License  //
+// for more details.                                                            //
+//                                                                              //
+// You should have received a copy of the GNU Lesser General Public License     //
+// along with simple-jbdd. If not, see <https://www.gnu.org/licenses/>.         //
+//////////////////////////////////////////////////////////////////////////////////
+
+package space.kklochko.simple_jbdd.tests.commands.decorators;
+
+import space.kklochko.simple_jbdd.tests.Test;
+import space.kklochko.simple_jbdd.tests.commands.AbstractTestCommand;
+
+public class ErrorDecorator<T extends Test> extends AbstractDecorator<T> {
+    public ErrorDecorator(String error_label, AbstractTestCommand<T> command, String type) {
+        super(error_label, command);
+        setType(type);
+    }
+
+    public boolean test() {
+        return false;
+    }
+
+    public boolean runMethod() {
+        return false;
+    };
+}
+

src/main/java/space/kklochko/simple_jbdd/tests/factories/AbstractTestRunnerFactory.java

@@ -1,3 +1,22 @@
+//////////////////////////////////////////////////////////////////////////////////
+// Copyright (C) 2023 Kostiantyn Klochko <kklochko@protonmail.com>              //
+//                                                                              //
+// This file is part of simple-jbdd.                                            //
+//                                                                              //
+// simple-jbdd is free software: you can redistribute it and/or modify it under //
+// the terms of the GNU Lesser General Public License as published by the Free  //
+// Software Foundation, either version 3 of the License, or (at your option)    //
+// any later version.                                                           //
+//                                                                              //
+// simple-jbdd is distributed in the hope that it will be useful, but WITHOUT   //
+// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or        //
+// FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License  //
+// for more details.                                                            //
+//                                                                              //
+// You should have received a copy of the GNU Lesser General Public License     //
+// along with simple-jbdd. If not, see <https://www.gnu.org/licenses/>.         //
+//////////////////////////////////////////////////////////////////////////////////
+
 package space.kklochko.simple_jbdd.tests.factories;
 
 import space.kklochko.simple_jbdd.tests.Test;

src/main/java/space/kklochko/simple_jbdd/tests/factories/SimpleTestRunnerFactory.java

@@ -1,3 +1,22 @@
+//////////////////////////////////////////////////////////////////////////////////
+// Copyright (C) 2023 Kostiantyn Klochko <kklochko@protonmail.com>              //
+//                                                                              //
+// This file is part of simple-jbdd.                                            //
+//                                                                              //
+// simple-jbdd is free software: you can redistribute it and/or modify it under //
+// the terms of the GNU Lesser General Public License as published by the Free  //
+// Software Foundation, either version 3 of the License, or (at your option)    //
+// any later version.                                                           //
+//                                                                              //
+// simple-jbdd is distributed in the hope that it will be useful, but WITHOUT   //
+// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or        //
+// FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License  //
+// for more details.                                                            //
+//                                                                              //
+// You should have received a copy of the GNU Lesser General Public License     //
+// along with simple-jbdd. If not, see <https://www.gnu.org/licenses/>.         //
+//////////////////////////////////////////////////////////////////////////////////
+
 package space.kklochko.simple_jbdd.tests.factories;
 
 import space.kklochko.simple_jbdd.tests.Test;

src/main/java/space/kklochko/simple_jbdd/tests/factories/TestCommandFactory.java

@@ -1,3 +1,22 @@
+//////////////////////////////////////////////////////////////////////////////////
+// Copyright (C) 2023 Kostiantyn Klochko <kklochko@protonmail.com>              //
+//                                                                              //
+// This file is part of simple-jbdd.                                            //
+//                                                                              //
+// simple-jbdd is free software: you can redistribute it and/or modify it under //
+// the terms of the GNU Lesser General Public License as published by the Free  //
+// Software Foundation, either version 3 of the License, or (at your option)    //
+// any later version.                                                           //
+//                                                                              //
+// simple-jbdd is distributed in the hope that it will be useful, but WITHOUT   //
+// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or        //
+// FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License  //
+// for more details.                                                            //
+//                                                                              //
+// You should have received a copy of the GNU Lesser General Public License     //
+// along with simple-jbdd. If not, see <https://www.gnu.org/licenses/>.         //
+//////////////////////////////////////////////////////////////////////////////////
+
 package space.kklochko.simple_jbdd.tests.factories;
 
 import space.kklochko.simple_jbdd.annotations.Given;
@@ -8,40 +27,66 @@ import space.kklochko.simple_jbdd.tests.Test;
 import space.kklochko.simple_jbdd.tests.commands.AbstractTestCommand;
 import space.kklochko.simple_jbdd.tests.commands.SimpleTestCommand;
 import space.kklochko.simple_jbdd.tests.commands.decorators.BlockDecorator;
+import space.kklochko.simple_jbdd.tests.commands.decorators.ErrorDecorator;
+import space.kklochko.simple_jbdd.tests.factories.validators.*;
 
 import java.lang.annotation.Annotation;
 import java.lang.reflect.Method;
-import java.util.Map;
+import java.util.*;
-import java.util.TreeMap;
 
 public class TestCommandFactory {
     public AbstractTestCommand create(Test input) {
 	    Class<?> aClass = input.getClass();
-	    Map<String, Method> test_methods = this.getTestMethods(aClass);
+	    Map<String, ArrayList<Method>> test_methods = this.getTestMethods(aClass);
 
         AbstractTestCommand<Test> aTestCommand = createTest(aClass, input);
 
+        ArrayList<Validator> validators = new ArrayList<>();
+        validators.add(new EmptyValidator());
+        validators.add(new HasMethodsWithArgumentsValidator());
+        validators.add(new HasNonVoidMethodsValidator());
+        validators.add(new HasPrivateMethodsValidator());
+
+        for(var validator : validators) {
+            if(validator.validate(test_methods)) {
+                String name = validator.getMessage();
+                return new ErrorDecorator(name, aTestCommand, validator.getErrorType());
+            }
+        }
+
         if(test_methods.containsKey("Then")) {
-            Method then = test_methods.get("Then");
+            ArrayList<Method> thens = getMethodsInReverseOrder(test_methods, "Then");
-            String label = then.getAnnotation(Then.class).value();
+            for(Method then : thens) {
-            aTestCommand = new BlockDecorator<Test>(label, aTestCommand, then, "Then");
+                String label = then.getAnnotation(Then.class).value();
+                aTestCommand = new BlockDecorator<Test>(label, aTestCommand, then, "Then");
+            }
         }
 
         if(test_methods.containsKey("When")) {
-            Method when = test_methods.get("When");
+            ArrayList<Method> whens = getMethodsInReverseOrder(test_methods, "When");
-            String label = when.getAnnotation(When.class).value();
+            for(Method when : whens) {
-            aTestCommand = new BlockDecorator<Test>(label, aTestCommand, when, "When");
+                String label = when.getAnnotation(When.class).value();
+                aTestCommand = new BlockDecorator<Test>(label, aTestCommand, when, "When");
+            }
         }
 
         if(test_methods.containsKey("Given")) {
-            Method when = test_methods.get("Given");
+            ArrayList<Method> givens = getMethodsInReverseOrder(test_methods, "Given");
-            String label = when.getAnnotation(Given.class).value();
+            for(Method given : givens) {
-            aTestCommand = new BlockDecorator<Test>(label, aTestCommand, when, "Given");
+                String label = given.getAnnotation(Given.class).value();
+                aTestCommand = new BlockDecorator<Test>(label, aTestCommand, given, "Given");
+            }
         }
 
         return aTestCommand;
     }
 
+    private ArrayList<Method> getMethodsInReverseOrder(Map<String, ArrayList<Method>> test_methods, String key) {
+        ArrayList<Method> methods = test_methods.get(key);
+        Collections.reverse(methods);
+        return methods;
+    }
+
     protected AbstractTestCommand<Test> createTest(Class<?> aClass, Test input) {
         Title aTitle = aClass.getAnnotation(Title.class);
         String title = aClass.getName();
@@ -52,8 +97,8 @@ public class TestCommandFactory {
         return new SimpleTestCommand<Test>(title, input);
     }
 
-    protected <T extends Test> Map<String, Method> getTestMethods(Class<?> aClass) {
+    protected <T extends Test> Map<String, ArrayList<Method>> getTestMethods(Class<?> aClass) {
-        Map<String, Method> test_methods = new TreeMap<String, Method>();
+        Map<String, ArrayList<Method>> test_methods = new TreeMap<>();
 
         for(Method method : aClass.getDeclaredMethods()) {
             Annotation[] annotations = method.getAnnotations();
@@ -62,15 +107,21 @@ public class TestCommandFactory {
                 continue;
 
             if(method.isAnnotationPresent(Given.class))
-                test_methods.put("Given", method);
+                addMethodTo(test_methods, "Given", method);
 
             if(method.isAnnotationPresent(When.class))
-                test_methods.put("When", method);
+                addMethodTo(test_methods, "When", method);
 
             if(method.isAnnotationPresent(Then.class))
-                test_methods.put("Then", method);
+                addMethodTo(test_methods, "Then", method);
         }
 
         return test_methods;
     }
+
+    private void addMethodTo(Map<String, ArrayList<Method>> test_methods, String key, Method method) {
+        ArrayList<Method> methods = test_methods.getOrDefault(key, new ArrayList<>());
+        methods.add(method);
+        test_methods.put(key, methods);
+    }
 }

src/main/java/space/kklochko/simple_jbdd/tests/factories/TestCommandQueueFactory.java

@@ -1,3 +1,22 @@
+//////////////////////////////////////////////////////////////////////////////////
+// Copyright (C) 2023 Kostiantyn Klochko <kklochko@protonmail.com>              //
+//                                                                              //
+// This file is part of simple-jbdd.                                            //
+//                                                                              //
+// simple-jbdd is free software: you can redistribute it and/or modify it under //
+// the terms of the GNU Lesser General Public License as published by the Free  //
+// Software Foundation, either version 3 of the License, or (at your option)    //
+// any later version.                                                           //
+//                                                                              //
+// simple-jbdd is distributed in the hope that it will be useful, but WITHOUT   //
+// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or        //
+// FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License  //
+// for more details.                                                            //
+//                                                                              //
+// You should have received a copy of the GNU Lesser General Public License     //
+// along with simple-jbdd. If not, see <https://www.gnu.org/licenses/>.         //
+//////////////////////////////////////////////////////////////////////////////////
+
 package space.kklochko.simple_jbdd.tests.factories;
 
 import space.kklochko.simple_jbdd.tests.Test;
@@ -9,6 +28,11 @@ public class TestCommandQueueFactory {
     private ArrayList<Test> tests;
     private TestCommandFactory factory;
 
+    public TestCommandQueueFactory(ArrayList<Test> tests) {
+        setTests(tests);
+        setFactory(new TestCommandFactory());
+    }
+
     public TestCommandQueueFactory(ArrayList<Test> tests, TestCommandFactory factory) {
         setTests(tests);
         setFactory(factory);

src/main/java/space/kklochko/simple_jbdd/tests/factories/meta/AbstractTestCommandMetaDataFactory.java

@@ -0,0 +1,28 @@
+//////////////////////////////////////////////////////////////////////////////////
+// Copyright (C) 2023 Kostiantyn Klochko <kklochko@protonmail.com>              //
+//                                                                              //
+// This file is part of simple-jbdd.                                            //
+//                                                                              //
+// simple-jbdd is free software: you can redistribute it and/or modify it under //
+// the terms of the GNU Lesser General Public License as published by the Free  //
+// Software Foundation, either version 3 of the License, or (at your option)    //
+// any later version.                                                           //
+//                                                                              //
+// simple-jbdd is distributed in the hope that it will be useful, but WITHOUT   //
+// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or        //
+// FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License  //
+// for more details.                                                            //
+//                                                                              //
+// You should have received a copy of the GNU Lesser General Public License     //
+// along with simple-jbdd. If not, see <https://www.gnu.org/licenses/>.         //
+//////////////////////////////////////////////////////////////////////////////////
+
+package space.kklochko.simple_jbdd.tests.factories.meta;
+
+import java.util.AbstractMap;
+import java.util.ArrayList;
+
+public abstract class AbstractTestCommandMetaDataFactory {
+    abstract public ArrayList<AbstractMap.SimpleEntry<String, String>> create();
+}
+

src/main/java/space/kklochko/simple_jbdd/tests/factories/meta/TestCommandMetaDataFactory.java

@@ -0,0 +1,53 @@
+//////////////////////////////////////////////////////////////////////////////////
+// Copyright (C) 2023 Kostiantyn Klochko <kklochko@protonmail.com>              //
+//                                                                              //
+// This file is part of simple-jbdd.                                            //
+//                                                                              //
+// simple-jbdd is free software: you can redistribute it and/or modify it under //
+// the terms of the GNU Lesser General Public License as published by the Free  //
+// Software Foundation, either version 3 of the License, or (at your option)    //
+// any later version.                                                           //
+//                                                                              //
+// simple-jbdd is distributed in the hope that it will be useful, but WITHOUT   //
+// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or        //
+// FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License  //
+// for more details.                                                            //
+//                                                                              //
+// You should have received a copy of the GNU Lesser General Public License     //
+// along with simple-jbdd. If not, see <https://www.gnu.org/licenses/>.         //
+//////////////////////////////////////////////////////////////////////////////////
+
+package space.kklochko.simple_jbdd.tests.factories.meta;
+
+import space.kklochko.simple_jbdd.tests.commands.AbstractTestCommand;
+import space.kklochko.simple_jbdd.tests.commands.decorators.AbstractDecorator;
+
+import java.util.AbstractMap;
+import java.util.ArrayList;
+
+public class TestCommandMetaDataFactory extends AbstractTestCommandMetaDataFactory {
+    private AbstractTestCommand command;
+
+    public TestCommandMetaDataFactory(AbstractTestCommand command) {
+        this.command = command;
+    }
+
+    public ArrayList<AbstractMap.SimpleEntry<String, String>> create() {
+        ArrayList<AbstractMap.SimpleEntry<String, String>> blocks = new ArrayList<>();
+        AbstractTestCommand currentCommand = command;
+        Class<?> aClass = command.getClass();
+
+        while(AbstractDecorator.class.isAssignableFrom(aClass)) {
+            AbstractDecorator block = (AbstractDecorator) currentCommand;
+            blocks.add(new AbstractMap.SimpleEntry<>(block.getType(), block.getLabel()));
+
+            currentCommand = block.getCommand();
+            aClass = currentCommand.getClass();
+        }
+
+        blocks.add(0, (new AbstractMap.SimpleEntry<>(currentCommand.getType(), currentCommand.getLabel())));
+
+        return blocks;
+    }
+}
+

src/main/java/space/kklochko/simple_jbdd/tests/factories/validators/EmptyValidator.java

@@ -0,0 +1,51 @@
+//////////////////////////////////////////////////////////////////////////////////
+// Copyright (C) 2023 Kostiantyn Klochko <kklochko@protonmail.com>              //
+//                                                                              //
+// This file is part of simple-jbdd.                                            //
+//                                                                              //
+// simple-jbdd is free software: you can redistribute it and/or modify it under //
+// the terms of the GNU Lesser General Public License as published by the Free  //
+// Software Foundation, either version 3 of the License, or (at your option)    //
+// any later version.                                                           //
+//                                                                              //
+// simple-jbdd is distributed in the hope that it will be useful, but WITHOUT   //
+// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or        //
+// FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License  //
+// for more details.                                                            //
+//                                                                              //
+// You should have received a copy of the GNU Lesser General Public License     //
+// along with simple-jbdd. If not, see <https://www.gnu.org/licenses/>.         //
+//////////////////////////////////////////////////////////////////////////////////
+
+package space.kklochko.simple_jbdd.tests.factories.validators;
+
+import java.lang.reflect.Method;
+import java.util.ArrayList;
+import java.util.Map;
+
+public class EmptyValidator extends Validator {
+    private boolean isInvalid;
+
+    @Override
+    public boolean validate(Map<String, ArrayList<Method>> methods) {
+        isInvalid = (methods.size() == 0);
+        return isInvalid;
+    }
+
+    @Override
+    public String getErrorType() {
+        if(!isInvalid)
+            return "ok";
+
+        return "Error";
+    }
+
+    @Override
+    public String getMessage() {
+        if(!isInvalid)
+            return "ok";
+
+        return "ERROR!!! No blocks!!!";
+    }
+}
+

src/main/java/space/kklochko/simple_jbdd/tests/factories/validators/HasMethodsWithArgumentsValidator.java

@@ -0,0 +1,38 @@
+//////////////////////////////////////////////////////////////////////////////////
+// Copyright (C) 2023 Kostiantyn Klochko <kklochko@protonmail.com>              //
+//                                                                              //
+// This file is part of simple-jbdd.                                            //
+//                                                                              //
+// simple-jbdd is free software: you can redistribute it and/or modify it under //
+// the terms of the GNU Lesser General Public License as published by the Free  //
+// Software Foundation, either version 3 of the License, or (at your option)    //
+// any later version.                                                           //
+//                                                                              //
+// simple-jbdd is distributed in the hope that it will be useful, but WITHOUT   //
+// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or        //
+// FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License  //
+// for more details.                                                            //
+//                                                                              //
+// You should have received a copy of the GNU Lesser General Public License     //
+// along with simple-jbdd. If not, see <https://www.gnu.org/licenses/>.         //
+//////////////////////////////////////////////////////////////////////////////////
+
+package space.kklochko.simple_jbdd.tests.factories.validators;
+
+import java.lang.reflect.Method;
+
+public class HasMethodsWithArgumentsValidator extends MethodValidator {
+    @Override
+    protected boolean isMethodInvalid(Method method) {
+        return method.getParameterCount() != 0;
+    }
+
+    @Override
+    public String getMessage() {
+        if(!isInvalid)
+            return "ok";
+
+        return String.format("ERROR!!! Methods must have no arguments!!! Check methods: %s!!!", getMethodListAsString());
+    }
+}
+

src/main/java/space/kklochko/simple_jbdd/tests/factories/validators/HasNonVoidMethodsValidator.java

@@ -0,0 +1,38 @@
+//////////////////////////////////////////////////////////////////////////////////
+// Copyright (C) 2023 Kostiantyn Klochko <kklochko@protonmail.com>              //
+//                                                                              //
+// This file is part of simple-jbdd.                                            //
+//                                                                              //
+// simple-jbdd is free software: you can redistribute it and/or modify it under //
+// the terms of the GNU Lesser General Public License as published by the Free  //
+// Software Foundation, either version 3 of the License, or (at your option)    //
+// any later version.                                                           //
+//                                                                              //
+// simple-jbdd is distributed in the hope that it will be useful, but WITHOUT   //
+// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or        //
+// FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License  //
+// for more details.                                                            //
+//                                                                              //
+// You should have received a copy of the GNU Lesser General Public License     //
+// along with simple-jbdd. If not, see <https://www.gnu.org/licenses/>.         //
+//////////////////////////////////////////////////////////////////////////////////
+
+package space.kklochko.simple_jbdd.tests.factories.validators;
+
+import java.lang.reflect.Method;
+
+public class HasNonVoidMethodsValidator extends MethodValidator {
+    @Override
+    protected boolean isMethodInvalid(Method method) {
+        return !method.getReturnType().equals(void.class);
+    }
+
+    @Override
+    public String getMessage() {
+        if(!isInvalid)
+            return "ok";
+
+        return String.format("ERROR!!! Methods must have the void type!!! Check methods: %s!!!", getMethodListAsString());
+    }
+}
+

src/main/java/space/kklochko/simple_jbdd/tests/factories/validators/HasPrivateMethodsValidator.java

@@ -0,0 +1,39 @@
+//////////////////////////////////////////////////////////////////////////////////
+// Copyright (C) 2023 Kostiantyn Klochko <kklochko@protonmail.com>              //
+//                                                                              //
+// This file is part of simple-jbdd.                                            //
+//                                                                              //
+// simple-jbdd is free software: you can redistribute it and/or modify it under //
+// the terms of the GNU Lesser General Public License as published by the Free  //
+// Software Foundation, either version 3 of the License, or (at your option)    //
+// any later version.                                                           //
+//                                                                              //
+// simple-jbdd is distributed in the hope that it will be useful, but WITHOUT   //
+// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or        //
+// FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License  //
+// for more details.                                                            //
+//                                                                              //
+// You should have received a copy of the GNU Lesser General Public License     //
+// along with simple-jbdd. If not, see <https://www.gnu.org/licenses/>.         //
+//////////////////////////////////////////////////////////////////////////////////
+
+package space.kklochko.simple_jbdd.tests.factories.validators;
+
+import java.lang.reflect.Method;
+import java.lang.reflect.Modifier;
+
+public class HasPrivateMethodsValidator extends MethodValidator {
+    @Override
+    protected boolean isMethodInvalid(Method method) {
+        return !Modifier.isPublic(method.getModifiers());
+    }
+
+    @Override
+    public String getMessage() {
+        if(!isInvalid)
+            return "ok";
+
+        return String.format("ERROR!!! Methods must be public!!! Check method: %s!!!", getMethodListAsString());
+    }
+}
+

src/main/java/space/kklochko/simple_jbdd/tests/factories/validators/MethodValidator.java

@@ -0,0 +1,67 @@
+//////////////////////////////////////////////////////////////////////////////////
+// Copyright (C) 2023 Kostiantyn Klochko <kklochko@protonmail.com>              //
+//                                                                              //
+// This file is part of simple-jbdd.                                            //
+//                                                                              //
+// simple-jbdd is free software: you can redistribute it and/or modify it under //
+// the terms of the GNU Lesser General Public License as published by the Free  //
+// Software Foundation, either version 3 of the License, or (at your option)    //
+// any later version.                                                           //
+//                                                                              //
+// simple-jbdd is distributed in the hope that it will be useful, but WITHOUT   //
+// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or        //
+// FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License  //
+// for more details.                                                            //
+//                                                                              //
+// You should have received a copy of the GNU Lesser General Public License     //
+// along with simple-jbdd. If not, see <https://www.gnu.org/licenses/>.         //
+//////////////////////////////////////////////////////////////////////////////////
+
+package space.kklochko.simple_jbdd.tests.factories.validators;
+
+import java.lang.reflect.Method;
+import java.util.ArrayList;
+import java.util.Map;
+import java.util.stream.Collectors;
+
+abstract public class MethodValidator extends Validator{
+    protected boolean isInvalid;
+
+    protected ArrayList<Method> invalidMethods;
+
+    protected String getMethodListAsString() {
+        return invalidMethods.stream()
+                .map(m -> m.getName())
+                .collect(Collectors.joining(", "));
+    }
+
+    abstract protected boolean isMethodInvalid(Method method);
+
+    @Override
+    public boolean validate(Map<String, ArrayList<Method>> methods) {
+        isInvalid = false;
+        invalidMethods = new ArrayList<>();
+
+        for(var key : methods.keySet()) {
+            for(var method : methods.get(key)) {
+                if(isMethodInvalid(method)) {
+                    isInvalid = true;
+                    invalidMethods.add(method);
+                }
+            }
+        }
+
+        return isInvalid;
+    }
+
+    @Override
+    public String getErrorType() {
+        if(!isInvalid)
+            return "ok";
+
+        return "Error";
+    }
+
+    abstract public String getMessage();
+}
+

src/main/java/space/kklochko/simple_jbdd/tests/factories/validators/Validator.java

@@ -0,0 +1,30 @@
+//////////////////////////////////////////////////////////////////////////////////
+// Copyright (C) 2023 Kostiantyn Klochko <kklochko@protonmail.com>              //
+//                                                                              //
+// This file is part of simple-jbdd.                                            //
+//                                                                              //
+// simple-jbdd is free software: you can redistribute it and/or modify it under //
+// the terms of the GNU Lesser General Public License as published by the Free  //
+// Software Foundation, either version 3 of the License, or (at your option)    //
+// any later version.                                                           //
+//                                                                              //
+// simple-jbdd is distributed in the hope that it will be useful, but WITHOUT   //
+// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or        //
+// FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License  //
+// for more details.                                                            //
+//                                                                              //
+// You should have received a copy of the GNU Lesser General Public License     //
+// along with simple-jbdd. If not, see <https://www.gnu.org/licenses/>.         //
+//////////////////////////////////////////////////////////////////////////////////
+
+package space.kklochko.simple_jbdd.tests.factories.validators;
+
+import java.lang.reflect.Method;
+import java.util.ArrayList;
+import java.util.Map;
+
+public abstract class Validator {
+    abstract public boolean validate(Map<String, ArrayList<Method>> methods);
+    abstract public String getErrorType();
+    abstract public String getMessage();
+}

src/main/java/space/kklochko/simple_jbdd/tests/loaders/ClassLoader.java

@@ -0,0 +1,26 @@
+package space.kklochko.simple_jbdd.tests.loaders;
+
+import java.util.ArrayList;
+import java.util.Set;
+
+public class ClassLoader<T> {
+
+    AbstractNameClassLoader nameLoader;
+
+    public ClassLoader(AbstractNameClassLoader nameLoader) {
+        this.nameLoader = nameLoader;
+    }
+
+    public ArrayList<T> load() {
+        Set<Class<?>> names = nameLoader.load();
+        ArrayList<T> classes = new ArrayList<>();
+
+        for(Class<?> name : names) {
+            SingleClassLoader loader = new SingleClassLoader(name.getName());
+            classes.add((T) loader.load());
+        }
+
+        return classes;
+    }
+}
+

src/main/java/space/kklochko/simple_jbdd/tests/loaders/SingleTestLoader.java

@@ -0,0 +1,50 @@
+package space.kklochko.simple_jbdd.tests.loaders;
+
+import space.kklochko.simple_jbdd.tests.Test;
+
+import java.lang.reflect.Constructor;
+import java.lang.reflect.InvocationTargetException;
+
+public class SingleTestLoader {
+    String className;
+
+    public SingleTestLoader(String className) {
+        setClassName(className);
+    }
+
+    public Test load() {
+        SingleClassLoader loader = new SingleClassLoader(getClassName());
+        Class<?> aClass = loader.load();
+
+        if(aClass == null)
+            return null;
+
+        Constructor defaultConstructor = null;
+
+        for(Constructor constructor : aClass.getDeclaredConstructors()) {
+            if(constructor.getParameterCount() == 0) {
+                defaultConstructor = constructor;
+                break;
+            }
+        }
+
+        try {
+            return (Test) defaultConstructor.newInstance();
+        } catch (InstantiationException e) {
+            throw new RuntimeException(e);
+        } catch (IllegalAccessException e) {
+            throw new RuntimeException(e);
+        } catch (InvocationTargetException e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    public String getClassName() {
+        return className;
+    }
+
+    public void setClassName(String className) {
+        this.className = className;
+    }
+}
+

src/main/java/space/kklochko/simple_jbdd/tests/reports/AbstractReporter.java

@@ -0,0 +1,59 @@
+//////////////////////////////////////////////////////////////////////////////////
+// Copyright (C) 2023 Kostiantyn Klochko <kklochko@protonmail.com>              //
+//                                                                              //
+// This file is part of simple-jbdd.                                            //
+//                                                                              //
+// simple-jbdd is free software: you can redistribute it and/or modify it under //
+// the terms of the GNU Lesser General Public License as published by the Free  //
+// Software Foundation, either version 3 of the License, or (at your option)    //
+// any later version.                                                           //
+//                                                                              //
+// simple-jbdd is distributed in the hope that it will be useful, but WITHOUT   //
+// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or        //
+// FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License  //
+// for more details.                                                            //
+//                                                                              //
+// You should have received a copy of the GNU Lesser General Public License     //
+// along with simple-jbdd. If not, see <https://www.gnu.org/licenses/>.         //
+//////////////////////////////////////////////////////////////////////////////////
+
+package space.kklochko.simple_jbdd.tests.reports;
+
+import space.kklochko.simple_jbdd.tests.factories.meta.AbstractTestCommandMetaDataFactory;
+import space.kklochko.simple_jbdd.tests.reports.fmt.AbstractTestReportFormatter;
+
+import java.util.AbstractMap;
+import java.util.ArrayList;
+
+public abstract class AbstractReporter {
+    ArrayList<AbstractMap.SimpleEntry<AbstractTestCommandMetaDataFactory, Boolean>> Metadata;
+    AbstractTestReportFormatter formatter;
+
+    public AbstractReporter(ArrayList<AbstractMap.SimpleEntry<AbstractTestCommandMetaDataFactory, Boolean>> metadata, AbstractTestReportFormatter formatter) {
+        setMetadata(metadata);
+        setFormatter(formatter);
+    }
+
+    abstract public void report();
+
+    public ArrayList<AbstractMap.SimpleEntry<AbstractTestCommandMetaDataFactory, Boolean>> getMetadata() {
+        return Metadata;
+    }
+
+    public void setMetadata(ArrayList<AbstractMap.SimpleEntry<AbstractTestCommandMetaDataFactory, Boolean>> metadata) {
+        Metadata = metadata;
+    }
+
+    public void addMetadata(AbstractTestCommandMetaDataFactory testMetaData, boolean isPassed) {
+        getMetadata().add(new AbstractMap.SimpleEntry<>(testMetaData, isPassed));
+    }
+
+    public AbstractTestReportFormatter getFormatter() {
+        return formatter;
+    }
+
+    public void setFormatter(AbstractTestReportFormatter formatter) {
+        this.formatter = formatter;
+    }
+}
+

src/main/java/space/kklochko/simple_jbdd/tests/reports/CLIReporter.java

@@ -0,0 +1,118 @@
+//////////////////////////////////////////////////////////////////////////////////
+// Copyright (C) 2023 Kostiantyn Klochko <kklochko@protonmail.com>              //
+//                                                                              //
+// This file is part of simple-jbdd.                                            //
+//                                                                              //
+// simple-jbdd is free software: you can redistribute it and/or modify it under //
+// the terms of the GNU Lesser General Public License as published by the Free  //
+// Software Foundation, either version 3 of the License, or (at your option)    //
+// any later version.                                                           //
+//                                                                              //
+// simple-jbdd is distributed in the hope that it will be useful, but WITHOUT   //
+// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or        //
+// FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License  //
+// for more details.                                                            //
+//                                                                              //
+// You should have received a copy of the GNU Lesser General Public License     //
+// along with simple-jbdd. If not, see <https://www.gnu.org/licenses/>.         //
+//////////////////////////////////////////////////////////////////////////////////
+
+package space.kklochko.simple_jbdd.tests.reports;
+
+import space.kklochko.simple_jbdd.tests.factories.meta.AbstractTestCommandMetaDataFactory;
+import space.kklochko.simple_jbdd.tests.reports.fmt.AbstractTestReportFormatter;
+
+import java.util.AbstractMap;
+import java.util.ArrayList;
+import org.apache.commons.lang3.StringUtils;
+
+public class CLIReporter extends AbstractReporter {
+    final int terminalWidth = 80;
+
+    public CLIReporter(AbstractTestReportFormatter formatter) {
+        super(null, formatter);
+    }
+
+    public CLIReporter(ArrayList<AbstractMap.SimpleEntry<AbstractTestCommandMetaDataFactory, Boolean>> metadata, AbstractTestReportFormatter formatter) {
+        super(metadata, formatter);
+    }
+
+    public void report() {
+        ArrayList<AbstractMap.SimpleEntry<String, Boolean>> testData = format();
+        ArrayList<AbstractMap.SimpleEntry<String, Boolean>> failedTestData = getFailedTests(testData);
+        int passed = count(testData, true);
+        int failed = count(testData, false);
+
+        System.out.printf("%s\n\n", center(" Tests "));
+        printTests(testData);
+
+        if(failed != 0) {
+            System.out.printf("%s\n\n", center(" Errors "));
+            printTests(failedTestData);
+        }
+
+        System.out.printf("%s\n", center(" Summary "));
+        System.out.print(summary(passed, failed));
+    }
+
+    public ArrayList<AbstractMap.SimpleEntry<String, Boolean>> format() {
+        ArrayList<AbstractMap.SimpleEntry<String, Boolean>> data = new ArrayList<>();
+
+        for(var pair : getMetadata()) {
+            boolean isPassed = pair.getValue();
+
+            getFormatter().setTestMetaData(pair.getKey().create());
+            getFormatter().setPassed(isPassed);
+
+            data.add(new AbstractMap.SimpleEntry<>(getFormatter().format(), isPassed));
+        }
+
+        return data;
+    }
+
+    public ArrayList<AbstractMap.SimpleEntry<String, Boolean>> getFailedTests(ArrayList<AbstractMap.SimpleEntry<String, Boolean>> testData) {
+        ArrayList<AbstractMap.SimpleEntry<String, Boolean>> failed = new ArrayList<>();
+
+        for(var pair : testData) {
+            boolean isPassed = pair.getValue();
+
+            if(isPassed) continue;
+
+            failed.add(pair);
+        }
+
+        return failed;
+    }
+
+    public int count(ArrayList<AbstractMap.SimpleEntry<String, Boolean>> testData, boolean isPassedStatus) {
+        int count = 0;
+
+        for(var pair : testData) {
+            boolean isPassed = pair.getValue();
+
+            if(isPassed == isPassedStatus)
+                count++;
+        }
+
+        return count;
+    }
+
+    public void printTests(ArrayList<AbstractMap.SimpleEntry<String, Boolean>> testData) {
+        for(var pair : testData) {
+            System.out.print(pair.getKey());
+        }
+    }
+
+    public String center(String content) {
+        return StringUtils.center(content, 80, '=');
+    }
+
+    public String summary(int passed, int failed) {
+        int all = passed + failed;
+        double passedPercent = (double) passed / (double) all * 100.0;
+        double failedPercent = (double) failed / (double) all * 100.0;
+
+        return String.format("Ran %d tests.\nPassed: %d (%.2f%%)\nFailed: %d (%.2f%%)\n", all, passed, passedPercent, failed, failedPercent);
+    }
+}
+

src/main/java/space/kklochko/simple_jbdd/tests/reports/fmt/AbstractTestReportFormatter.java

@@ -0,0 +1,52 @@
+//////////////////////////////////////////////////////////////////////////////////
+// Copyright (C) 2023 Kostiantyn Klochko <kklochko@protonmail.com>              //
+//                                                                              //
+// This file is part of simple-jbdd.                                            //
+//                                                                              //
+// simple-jbdd is free software: you can redistribute it and/or modify it under //
+// the terms of the GNU Lesser General Public License as published by the Free  //
+// Software Foundation, either version 3 of the License, or (at your option)    //
+// any later version.                                                           //
+//                                                                              //
+// simple-jbdd is distributed in the hope that it will be useful, but WITHOUT   //
+// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or        //
+// FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License  //
+// for more details.                                                            //
+//                                                                              //
+// You should have received a copy of the GNU Lesser General Public License     //
+// along with simple-jbdd. If not, see <https://www.gnu.org/licenses/>.         //
+//////////////////////////////////////////////////////////////////////////////////
+
+package space.kklochko.simple_jbdd.tests.reports.fmt;
+
+import java.util.AbstractMap;
+import java.util.ArrayList;
+
+abstract public class AbstractTestReportFormatter {
+    private ArrayList<AbstractMap.SimpleEntry<String, String>> testMetaData;
+    private boolean isPassed;
+
+    public AbstractTestReportFormatter(ArrayList<AbstractMap.SimpleEntry<String, String>> testMetaData, boolean isPassed) {
+        setTestMetaData(testMetaData);
+        setPassed(isPassed);
+    }
+
+    public abstract String format();
+
+    public ArrayList<AbstractMap.SimpleEntry<String, String>> getTestMetaData() {
+        return testMetaData;
+    }
+
+    public void setTestMetaData(ArrayList<AbstractMap.SimpleEntry<String, String>> testMetaData) {
+        this.testMetaData = testMetaData;
+    }
+
+    public boolean isPassed() {
+        return isPassed;
+    }
+
+    public void setPassed(boolean passed) {
+        isPassed = passed;
+    }
+}
+

src/main/java/space/kklochko/simple_jbdd/tests/reports/fmt/SimpleTestReportFormatter.java

@@ -0,0 +1,61 @@
+//////////////////////////////////////////////////////////////////////////////////
+// Copyright (C) 2023 Kostiantyn Klochko <kklochko@protonmail.com>              //
+//                                                                              //
+// This file is part of simple-jbdd.                                            //
+//                                                                              //
+// simple-jbdd is free software: you can redistribute it and/or modify it under //
+// the terms of the GNU Lesser General Public License as published by the Free  //
+// Software Foundation, either version 3 of the License, or (at your option)    //
+// any later version.                                                           //
+//                                                                              //
+// simple-jbdd is distributed in the hope that it will be useful, but WITHOUT   //
+// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or        //
+// FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License  //
+// for more details.                                                            //
+//                                                                              //
+// You should have received a copy of the GNU Lesser General Public License     //
+// along with simple-jbdd. If not, see <https://www.gnu.org/licenses/>.         //
+//////////////////////////////////////////////////////////////////////////////////
+
+package space.kklochko.simple_jbdd.tests.reports.fmt;
+
+import space.kklochko.simple_jbdd.tests.Test;
+
+import java.util.AbstractMap;
+import java.util.ArrayList;
+
+public class SimpleTestReportFormatter extends AbstractTestReportFormatter {
+    final private String passedIcon = "✓";
+    final private String failedIcon = "⨯";
+
+    public SimpleTestReportFormatter() {
+        super(null, false);
+    }
+
+    public SimpleTestReportFormatter(ArrayList<AbstractMap.SimpleEntry<String, String>> testMetaData, boolean isPassed) {
+        super(testMetaData, isPassed);
+    }
+
+    public String format() {
+        String status = (isPassed()) ? getPassedIcon() : getFailedIcon();
+        String title = getTestMetaData().get(0).getValue();
+
+        String result = String.format("%s %s\n", status, title);
+
+        for(int i=1; i<getTestMetaData().size(); ++i) {
+            AbstractMap.SimpleEntry<String, String> pair = getTestMetaData().get(i);
+            result += String.format("\t%s: %s\n", pair.getKey(), pair.getValue());
+        }
+
+        return result + '\n';
+    }
+
+    public String getPassedIcon() {
+        return passedIcon;
+    }
+
+    public String getFailedIcon() {
+        return failedIcon;
+    }
+}
+

src/main/java/space/kklochko/simple_jbdd/tests/runners/AbstractTestRunner.java

@@ -1,3 +1,22 @@
+//////////////////////////////////////////////////////////////////////////////////
+// Copyright (C) 2023 Kostiantyn Klochko <kklochko@protonmail.com>              //
+//                                                                              //
+// This file is part of simple-jbdd.                                            //
+//                                                                              //
+// simple-jbdd is free software: you can redistribute it and/or modify it under //
+// the terms of the GNU Lesser General Public License as published by the Free  //
+// Software Foundation, either version 3 of the License, or (at your option)    //
+// any later version.                                                           //
+//                                                                              //
+// simple-jbdd is distributed in the hope that it will be useful, but WITHOUT   //
+// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or        //
+// FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License  //
+// for more details.                                                            //
+//                                                                              //
+// You should have received a copy of the GNU Lesser General Public License     //
+// along with simple-jbdd. If not, see <https://www.gnu.org/licenses/>.         //
+//////////////////////////////////////////////////////////////////////////////////
+
 package space.kklochko.simple_jbdd.tests.runners;
 
 public abstract class AbstractTestRunner {

src/main/java/space/kklochko/simple_jbdd/tests/runners/CLITestRunner.java

@@ -0,0 +1,121 @@
+//////////////////////////////////////////////////////////////////////////////////
+// Copyright (C) 2023 Kostiantyn Klochko <kklochko@protonmail.com>              //
+//                                                                              //
+// This file is part of simple-jbdd.                                            //
+//                                                                              //
+// simple-jbdd is free software: you can redistribute it and/or modify it under //
+// the terms of the GNU Lesser General Public License as published by the Free  //
+// Software Foundation, either version 3 of the License, or (at your option)    //
+// any later version.                                                           //
+//                                                                              //
+// simple-jbdd is distributed in the hope that it will be useful, but WITHOUT   //
+// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or        //
+// FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License  //
+// for more details.                                                            //
+//                                                                              //
+// You should have received a copy of the GNU Lesser General Public License     //
+// along with simple-jbdd. If not, see <https://www.gnu.org/licenses/>.         //
+//////////////////////////////////////////////////////////////////////////////////
+
+package space.kklochko.simple_jbdd.tests.runners;
+
+import space.kklochko.simple_jbdd.tests.Test;
+import space.kklochko.simple_jbdd.tests.commands.AbstractTestCommand;
+import space.kklochko.simple_jbdd.tests.factories.AbstractTestRunnerFactory;
+import space.kklochko.simple_jbdd.tests.factories.TestCommandQueueFactory;
+import space.kklochko.simple_jbdd.tests.factories.meta.AbstractTestCommandMetaDataFactory;
+import space.kklochko.simple_jbdd.tests.factories.meta.TestCommandMetaDataFactory;
+import space.kklochko.simple_jbdd.tests.loaders.AbstractNameClassLoader;
+import space.kklochko.simple_jbdd.tests.loaders.SingleTestLoader;
+import space.kklochko.simple_jbdd.tests.reports.AbstractReporter;
+
+import java.util.AbstractMap;
+import java.util.ArrayList;
+import java.util.Set;
+import java.util.stream.Collectors;
+import java.util.stream.IntStream;
+
+public class CLITestRunner extends AbstractTestRunner {
+    private ArrayList<AbstractTestCommand<Test>> commands;
+    private AbstractNameClassLoader classLoader;
+    private AbstractTestRunnerFactory runnerFactory;
+    private AbstractReporter reporter;
+
+    public CLITestRunner(AbstractNameClassLoader classLoader, AbstractTestRunnerFactory runnerFactory, AbstractReporter reporter) {
+        setClassLoader(classLoader);
+        setRunnerFactory(runnerFactory);
+        setReporter(reporter);
+    }
+
+    public boolean run() {
+        commands = createCommands(load());
+        ArrayList<Boolean> testStatuses = runTests(commands);
+        report(createMetadata(commands, testStatuses));
+
+        return isFailed(testStatuses);
+    }
+
+    public ArrayList<Test> load() {
+        Set<Class<?>> classes = this.classLoader.load();
+        ArrayList<Test> tests = new ArrayList();
+
+        for(var aClass : classes) {
+            tests.add((new SingleTestLoader(aClass.getName())).load());
+        }
+
+        return tests;
+    }
+
+    public ArrayList<AbstractTestCommand<Test>> createCommands(ArrayList<Test> tests) {
+        TestCommandQueueFactory factory = new TestCommandQueueFactory(tests);
+        return factory.create();
+    }
+
+    public ArrayList<Boolean> runTests(ArrayList<AbstractTestCommand<Test>> commands) {
+        return commands.stream()
+                       .map(c -> runnerFactory.create(c).run())
+                       .collect(Collectors.toCollection(ArrayList::new));
+    }
+
+    public ArrayList<AbstractMap.SimpleEntry<AbstractTestCommandMetaDataFactory, Boolean>> createMetadata(ArrayList<AbstractTestCommand<Test>> commands, ArrayList<Boolean> testStatuses) {
+        return IntStream.range(0, commands.size())
+                        .mapToObj(i -> new AbstractMap.SimpleEntry<AbstractTestCommandMetaDataFactory, Boolean>(
+                                            new TestCommandMetaDataFactory(commands.get(i)),
+                                            testStatuses.get(i)))
+                        .collect(Collectors.toCollection(ArrayList::new));
+    }
+
+    public void report(ArrayList<AbstractMap.SimpleEntry<AbstractTestCommandMetaDataFactory, Boolean>> metadata) {
+        reporter.setMetadata(metadata);
+        reporter.report();
+    }
+
+    public boolean isFailed(ArrayList<Boolean> testStatuses) {
+        return !testStatuses.stream().anyMatch(b -> b == false);
+    }
+
+    public AbstractNameClassLoader getClassLoader() {
+        return classLoader;
+    }
+
+    public void setClassLoader(AbstractNameClassLoader classLoader) {
+        this.classLoader = classLoader;
+    }
+
+    public AbstractTestRunnerFactory getRunnerFactory() {
+        return runnerFactory;
+    }
+
+    public void setRunnerFactory(AbstractTestRunnerFactory runnerFactory) {
+        this.runnerFactory = runnerFactory;
+    }
+
+    public AbstractReporter getReporter() {
+        return reporter;
+    }
+
+    public void setReporter(AbstractReporter reporter) {
+        this.reporter = reporter;
+    }
+}
+

src/main/java/space/kklochko/simple_jbdd/tests/runners/SimpleTestRunner.java

@@ -1,3 +1,22 @@
+//////////////////////////////////////////////////////////////////////////////////
+// Copyright (C) 2023 Kostiantyn Klochko <kklochko@protonmail.com>              //
+//                                                                              //
+// This file is part of simple-jbdd.                                            //
+//                                                                              //
+// simple-jbdd is free software: you can redistribute it and/or modify it under //
+// the terms of the GNU Lesser General Public License as published by the Free  //
+// Software Foundation, either version 3 of the License, or (at your option)    //
+// any later version.                                                           //
+//                                                                              //
+// simple-jbdd is distributed in the hope that it will be useful, but WITHOUT   //
+// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or        //
+// FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License  //
+// for more details.                                                            //
+//                                                                              //
+// You should have received a copy of the GNU Lesser General Public License     //
+// along with simple-jbdd. If not, see <https://www.gnu.org/licenses/>.         //
+//////////////////////////////////////////////////////////////////////////////////
+
 package space.kklochko.simple_jbdd.tests.runners;
 
 import space.kklochko.simple_jbdd.tests.Test;

src/test/groovy/space/kklochko/simple_jbdd/tests/factories/TestCommandFactorySpec.groovy

@@ -1,5 +1,7 @@
 package space.kklochko.simple_jbdd.tests.factories
 
+import space.kklochko.simple_jbdd.test_examples.tests.SimpleEmptyTest
+import space.kklochko.simple_jbdd.test_examples.tests.SimpleGivenGivenWhenWhenThenThenTest
 import space.kklochko.simple_jbdd.test_examples.tests.SimpleGivenWhenThenTest
 import space.kklochko.simple_jbdd.test_examples.tests.SimpleThenTest
 import space.kklochko.simple_jbdd.test_examples.tests.SimpleThenTestWithoutTitle
@@ -14,19 +16,28 @@ those tests check if factory generate them right.
 """)
 @Title("Unit tests for TestCommandFactory")
 class TestCommandFactorySpec extends Specification {
-    def "If the map of methods have one test block."() {
+    def "The command have the same block count."() {
         given: "I have a TestCommandFactory object"
         @Subject
         def factory = new TestCommandFactory();
 
-        and: "I also have a SimpleThenTest object"
+        when: "If a test command have blocks"
-        def simpleThenTest = new SimpleThenTest()
+        def map = factory.getTestMethods(testClass.getClass())
 
-        when: "If a test have only one block"
+        def count = map.values()
-        def map = factory.getTestMethods(simpleThenTest.getClass())
+                .stream()
+                .map {it.size()}
+                .reduce(0) { acc, num -> acc + num }
 
-        then: "the map size is 1 method"
+        then: "the command have the expected block count"
-        1 == map.size()
+        expectedBlockCount == count
+
+        where:
+        testClass                                  || expectedBlockCount
+        new SimpleEmptyTest()                      || 0
+        new SimpleThenTest()                       || 1
+        new SimpleGivenWhenThenTest()              || 3
+        new SimpleGivenGivenWhenWhenThenThenTest() || 6
     }
 
     def "createTest() sets the title to a class name if no Title annotation."() {
@@ -63,34 +74,22 @@ class TestCommandFactorySpec extends Specification {
         title == test.getLabels()['Title']
     }
 
-    def "createTest() build a Test with only Then."() {
+    def "createTest() build a TestCommand that contains the expected blocks."() {
         given: "I have a test factory"
         @Subject
         def factory = new TestCommandFactory()
 
-        and: "I have a test class with Title"
-        def testClass = new SimpleThenTest()
-
         when: "I build a test"
         def test = factory.create(testClass)
 
-        then: "The test have title and then method"
+        then: "The test have the expected blocks"
-        ['Title', 'Then'].toSet() == test.getLabels().keySet()
+        expectedBlocks.toSet() == test.getLabels().keySet()
-    }
 
-    def "createTest() build a Test with Given-When-Then."() {
+        where:
-        given: "I have a test factory"
+        testClass                                  || expectedBlocks
-        @Subject
+        new SimpleThenTest()                       || ['Title', 'Then']
-        def factory = new TestCommandFactory()
+        new SimpleGivenWhenThenTest()              || ['Title', 'Given', 'When', 'Then']
-
+        new SimpleGivenGivenWhenWhenThenThenTest() || ['Title', 'Given', 'When', 'Then']
-        and: "I have a test class with Title and Given-When-Then"
-        def testClass = new SimpleGivenWhenThenTest()
-
-        when: "I build a test"
-        def test = factory.create(testClass)
-
-        then: "The test have title and then method"
-        ['Title', 'Given', 'When', 'Then'].toSet() == test.getLabels().keySet()
     }
 }
 

src/test/groovy/space/kklochko/simple_jbdd/tests/factories/meta/IntegratedTestCommandMetaDataFactorySpec.groovy

@@ -0,0 +1,46 @@
+package space.kklochko.simple_jbdd.tests.factories.meta
+
+import space.kklochko.simple_jbdd.test_examples.tests.SimpleFailedThenTest
+import space.kklochko.simple_jbdd.test_examples.tests.SimpleGivenWhenThenTest
+import space.kklochko.simple_jbdd.test_examples.tests.SimpleThenTest
+import space.kklochko.simple_jbdd.test_examples.tests.SimpleThenTestWithoutTitle
+import space.kklochko.simple_jbdd.tests.commands.AbstractTestCommand
+import space.kklochko.simple_jbdd.tests.commands.decorators.BlockDecorator
+import space.kklochko.simple_jbdd.tests.factories.TestCommandFactory
+import space.kklochko.simple_jbdd.tests.runners.SimpleTestRunner
+import spock.lang.Narrative
+import spock.lang.Specification
+import spock.lang.Subject
+import spock.lang.Title
+
+@Narrative("""The factory must generate a test command metadata, so
+those tests check if the factory generate it right.
+""")
+@Title("Integrated tests for TestCommandMetaDataFactory")
+class IntegratedTestCommandMetaDataFactorySpec extends Specification {
+    def "Metadata have  the map of methods have one test block."() {
+        given: "I have a command factory"
+        def commandFactory = new TestCommandFactory();
+
+        and: "I have a command of a test"
+        def command = commandFactory.create(testObject)
+
+        and: "I have a TestCommandMetaDataFactory object"
+        @Subject
+        def factory = new TestCommandMetaDataFactory(command)
+
+        when: "Parse the command to get metadata"
+        def metadata = factory.create()
+
+        then: "the metadata have only two labels for Title and Then"
+        expectedCount == metadata.size()
+
+        where: "Possible variants of tests"
+        testObject                       || expectedCount
+        new SimpleThenTest()             || 2
+        new SimpleGivenWhenThenTest()    || 4
+        new SimpleThenTestWithoutTitle() || 2
+        new SimpleFailedThenTest()       || 2
+    }
+}
+

src/test/groovy/space/kklochko/simple_jbdd/tests/factories/meta/TestCommandMetaDataFactorySpec.groovy

@@ -0,0 +1,93 @@
+package space.kklochko.simple_jbdd.tests.factories.meta
+
+import space.kklochko.simple_jbdd.test_examples.tests.SimpleGivenWhenThenTest
+import space.kklochko.simple_jbdd.test_examples.tests.SimpleThenTest
+import space.kklochko.simple_jbdd.tests.commands.AbstractTestCommand
+import space.kklochko.simple_jbdd.tests.commands.decorators.BlockDecorator
+import space.kklochko.simple_jbdd.tests.factories.TestCommandFactory
+import spock.lang.Narrative;
+import spock.lang.Specification
+import spock.lang.Subject
+import spock.lang.Title
+
+@Narrative("""The factory must generate a test command metadata, so
+those tests check if the factory generate it right.
+""")
+@Title("Unit tests for TestCommandMetaDataFactory")
+class TestCommandMetaDataFactorySpec extends Specification {
+    def "If the map of methods have one test block."() {
+        given: "I have a simple test with only Then block and its command."
+        def test = Mock(AbstractTestCommand) {
+            getType() >> "Title"
+            getLabel() >> "A simple test"
+        }
+
+        def command = GroovyMock(BlockDecorator) {
+            getType() >> "Then"
+            getLabel() >> "Then block"
+            getCommand() >> test
+        }
+
+        and: "I have a TestCommandMetaDataFactory object"
+        @Subject
+        def factory = new TestCommandMetaDataFactory(command)
+
+        when: "Parse the command to get metadata"
+        def metadata = factory.create()
+
+        then: "The metadata have only two labels for Title and Then"
+        2 == metadata.size()
+
+        and: "The format and the order must be the same"
+        metadata == [
+                new AbstractMap.SimpleEntry<>("Title", "A simple test"),
+                new AbstractMap.SimpleEntry<>("Then", "Then block")
+        ]
+    }
+
+    def "If the map of methods have GivenWhenThen blocks."() {
+        given: "I have a simple test with only Then block and its command."
+        def test = Mock(AbstractTestCommand) {
+            getType() >> "Title"
+            getLabel() >> "A simple test"
+        }
+
+        and: "Bootstrapping the test command"
+        def then = GroovyMock(BlockDecorator) {
+            getType() >> "Then"
+            getLabel() >> "Then block"
+            getCommand() >> test
+        }
+
+        def when = GroovyMock(BlockDecorator) {
+            getType() >> "When"
+            getLabel() >> "When block"
+            getCommand() >> then
+        }
+
+        def command = GroovyMock(BlockDecorator) {
+            getType() >> "Given"
+            getLabel() >> "Given block"
+            getCommand() >> when
+        }
+
+        and: "I have a TestCommandMetaDataFactory object"
+        @Subject
+        def factory = new TestCommandMetaDataFactory(command)
+
+        when: "Parse the command to get metadata"
+        def metadata = factory.create()
+
+        then: "The metadata have only two labels for Title and Then"
+        4 == metadata.size()
+
+        and: "The format and the order must be the same"
+        metadata == [
+                new AbstractMap.SimpleEntry<>("Title", "A simple test"),
+                new AbstractMap.SimpleEntry<>("Given", "Given block"),
+                new AbstractMap.SimpleEntry<>("When", "When block"),
+                new AbstractMap.SimpleEntry<>("Then", "Then block")
+        ]
+    }
+}
+

src/test/groovy/space/kklochko/simple_jbdd/tests/factories/validators/IntegratedValidatorsSpec.groovy

@@ -0,0 +1,66 @@
+package space.kklochko.simple_jbdd.tests.factories.validators
+
+import space.kklochko.simple_jbdd.test_examples.tests.HasMethodArgumentsTest
+import space.kklochko.simple_jbdd.test_examples.tests.HasNonVoidMethodTest
+import space.kklochko.simple_jbdd.test_examples.tests.HasPrivateMethodTest
+import space.kklochko.simple_jbdd.test_examples.tests.SimpleEmptyTest
+import space.kklochko.simple_jbdd.test_examples.tests.SimpleGivenWhenThenTest
+import space.kklochko.simple_jbdd.tests.factories.TestCommandFactory
+import spock.lang.Narrative
+import spock.lang.Specification
+import spock.lang.Subject
+import spock.lang.Title
+
+@Narrative("""The validators must return true if a test class is invalid, so
+those tests check if validators return the right result.
+""")
+@Title("Integrated tests for Validators")
+class IntegratedValidatorsSpec extends Specification {
+    def "Validator return isInvalid"() {
+        given: "I have a factory and metadata"
+        def factory = new TestCommandFactory()
+        def metaData = factory.getTestMethods(testClass)
+
+        when: "Validating the test"
+        def isInvalid = validator.validate(metaData)
+
+        then: "The status must be expected"
+        isInvalid == expectedStatus
+
+        where: "Possible variants of tests"
+        validator                              | testClass                     || expectedStatus
+        new HasMethodsWithArgumentsValidator() | HasMethodArgumentsTest.class  || true
+        new HasMethodsWithArgumentsValidator() | SimpleGivenWhenThenTest.class || false
+        new HasNonVoidMethodsValidator()       | HasNonVoidMethodTest.class    || true
+        new HasMethodsWithArgumentsValidator() | SimpleGivenWhenThenTest.class || false
+        new HasPrivateMethodsValidator()       | HasPrivateMethodTest.class    || true
+        new HasMethodsWithArgumentsValidator() | SimpleGivenWhenThenTest.class || false
+        new EmptyValidator()                   | SimpleEmptyTest.class         || true
+        new HasMethodsWithArgumentsValidator() | SimpleGivenWhenThenTest.class || false
+    }
+
+    def "Validator return the error message"() {
+        given: "I have a factory and metadata"
+        def factory = new TestCommandFactory()
+        def metaData = factory.getTestMethods(testClass)
+
+        when: "Validating the test and checking the message"
+        validator.validate(metaData)
+        def message = validator.getMessage()
+
+        then: "The message must be expected"
+        message == expectedMessage
+
+        where: "Possible variants of tests"
+        validator                              | testClass                     || expectedMessage
+        new HasMethodsWithArgumentsValidator() | HasMethodArgumentsTest.class  || "ERROR!!! Methods must have no arguments!!! Check methods: given, setupArguments!!!"
+        new HasMethodsWithArgumentsValidator() | SimpleGivenWhenThenTest.class || "ok"
+        new HasNonVoidMethodsValidator()       | HasNonVoidMethodTest.class    || "ERROR!!! Methods must have the void type!!! Check methods: then!!!"
+        new HasMethodsWithArgumentsValidator() | SimpleGivenWhenThenTest.class || "ok"
+        new HasPrivateMethodsValidator()       | HasPrivateMethodTest.class    || "ERROR!!! Methods must be public!!! Check method: given!!!"
+        new HasMethodsWithArgumentsValidator() | SimpleGivenWhenThenTest.class || "ok"
+        new EmptyValidator()                   | SimpleEmptyTest.class         || "ERROR!!! No blocks!!!"
+        new HasMethodsWithArgumentsValidator() | SimpleGivenWhenThenTest.class || "ok"
+    }
+}
+

src/test/groovy/space/kklochko/simple_jbdd/tests/loaders/IntegratedClassLoader.groovy

@@ -0,0 +1,43 @@
+package space.kklochko.simple_jbdd.tests.loaders
+
+import spock.lang.Narrative
+import spock.lang.Specification
+import spock.lang.Subject
+import spock.lang.Title
+
+@Narrative("""The loader must return a test classes or null, so
+those tests check if responses are right.
+""")
+@Title("Integrated tests for ClassLoader.")
+class IntegratedClassLoader extends Specification {
+    def "The classes have been loaded."() {
+        given: "I have a name class loader"
+        def nameLoader = new NameClassLoader()
+
+        and: "I have a loader for classes"
+        @Subject
+        def loader = new ClassLoader(nameLoader)
+
+        when: "The classes were loaded"
+        def classes = loader.load()
+
+        then: "Checking that the test result is expected"
+        11 == classes.size()
+    }
+
+    def "The classes must be represent the Test interface."() {
+        given: "I have a name class loader"
+        def nameLoader = new NameClassLoader()
+
+        and: "I have a loader for classes"
+        @Subject
+        def loader = new ClassLoader(nameLoader)
+
+        when: "The classes were loaded"
+        def classes = loader.load()
+
+        then: "Checking that the test result is expected"
+        classes.every({ space.kklochko.simple_jbdd.tests.Test.class.isAssignableFrom(it) })
+    }
+}
+

src/test/groovy/space/kklochko/simple_jbdd/tests/loaders/IntegratedNameClassLoader.groovy

@@ -19,7 +19,7 @@ class IntegratedNameClassLoader extends Specification {
         def classNames = loader.load()
 
         then: "Checking that the test result is expected"
-        3 == classNames.size()
+        11 == classNames.size()
     }
 }
 

src/test/groovy/space/kklochko/simple_jbdd/tests/loaders/IntegratedSingleClassLoader.groovy

@@ -9,7 +9,7 @@ import spock.lang.Title
 @Narrative("""The loader must return a class or null, so
 those tests check if responses are right.
 """)
-@Title("Integrated tests for ClassLoader.")
+@Title("Integrated tests for SingleClassLoader.")
 class IntegratedSingleClassLoader extends Specification {
     def "The class has been loaded."() {
         given: "I have a class loader"

src/test/groovy/space/kklochko/simple_jbdd/tests/loaders/IntegratedSingleTestLoader.groovy

@@ -0,0 +1,31 @@
+package space.kklochko.simple_jbdd.tests.loaders
+
+import space.kklochko.simple_jbdd.test_examples.tests.SimpleThenTest
+import spock.lang.Narrative
+import spock.lang.Specification
+import spock.lang.Subject
+import spock.lang.Title
+
+@Narrative("""The loader must return a class or null, so
+those tests check if responses are right.
+""")
+@Title("Integrated tests for SingleTestLoader.")
+class IntegratedSingleTestLoader extends Specification {
+    def "The class has been loaded."() {
+        given: "I have a class loader"
+        @Subject
+        def loader = new SingleTestLoader(className)
+
+        when: "The class was loaded"
+        def aClass = loader.load()
+
+        then: "Checking that the test result is expected"
+        aClass?.class == expectedClass
+
+        where: "Possible variants of tests"
+        className                                                       || expectedClass
+        "fourHundredFour"                                               || null
+        "space.kklochko.simple_jbdd.test_examples.tests.SimpleThenTest" || SimpleThenTest
+    }
+}
+

src/test/groovy/space/kklochko/simple_jbdd/tests/reports/CLIReporterFormatMethodSpec.groovy

@@ -0,0 +1,72 @@
+package space.kklochko.simple_jbdd.tests.reports
+
+import space.kklochko.simple_jbdd.tests.factories.meta.AbstractTestCommandMetaDataFactory
+import space.kklochko.simple_jbdd.tests.reports.fmt.AbstractTestReportFormatter
+import space.kklochko.simple_jbdd.tests.reports.fmt.SimpleTestReportFormatter
+import spock.lang.Narrative
+import spock.lang.Specification
+import spock.lang.Subject
+import spock.lang.Title
+
+@Narrative("""The reporter must generate a report in the same format, so
+those tests check if the reporter generate it right.
+""")
+@Title("Unit tests for CLIReporter.format()")
+class CLIReporterFormatMethodSpec extends Specification {
+    private metaData
+
+    def setup() {
+        def factory = Mock(AbstractTestCommandMetaDataFactory) {
+            create() >> [
+                    new AbstractMap.SimpleEntry<>("Title", "A simple test"),
+                    new AbstractMap.SimpleEntry<>("Then", "Then block")
+            ]
+        }
+
+        def metaData = [
+                new AbstractMap.SimpleEntry<>(factory, true),
+                new AbstractMap.SimpleEntry<>(factory, false)
+        ]
+
+        this.metaData = metaData
+    }
+
+    def "Format function use formatter twice."() {
+        given: "I have a formatter"
+        def formatter = Mock(AbstractTestReportFormatter)
+
+        and: "I have a reporter"
+        @Subject
+        def reporter = new CLIReporter(metaData, formatter)
+
+        when: "Generate the summary format"
+        def formattedTestData = reporter.format()
+
+        then: "The methods must called 2 times"
+        2 * formatter.format()
+        2 * formatter.setPassed(_)
+        2 * formatter.setTestMetaData(_)
+
+        and: "The data must have 2 elements"
+        2 == formattedTestData.size()
+    }
+
+    def "Format function returns the formatted data."() {
+        given: "I have a formatter"
+        def formatter = new SimpleTestReportFormatter()
+
+        and: "I have a reporter"
+        @Subject
+        def reporter = new CLIReporter(metaData, formatter)
+
+        when: "Generate the summary format"
+        def formattedTestData = reporter.format()
+
+        then: "The format must have not null values"
+        formattedTestData.every({ it.getKey() != null })
+
+        and: "The data must have 2 elements"
+        2 == formattedTestData.size()
+    }
+}
+

src/test/groovy/space/kklochko/simple_jbdd/tests/reports/CLIReporterSpec.groovy

@@ -0,0 +1,77 @@
+package space.kklochko.simple_jbdd.tests.reports
+
+import space.kklochko.simple_jbdd.tests.factories.meta.AbstractTestCommandMetaDataFactory
+import space.kklochko.simple_jbdd.tests.reports.fmt.AbstractTestReportFormatter
+import space.kklochko.simple_jbdd.tests.reports.fmt.SimpleTestReportFormatter
+import spock.lang.Narrative
+import spock.lang.Specification
+import spock.lang.Subject
+import spock.lang.Title
+
+@Narrative("""The reporter must generate a report in the same format, so
+those tests check if the reporter generate it right.
+""")
+@Title("Unit tests for CLIReporter")
+class CLIReporterSpec extends Specification {
+    def "Function, getFailedTest, returns the data of failed tests."() {
+        given: "I have a reporter"
+        @Subject
+        def reporter = new CLIReporter(null, null)
+
+        and: "I have a testData"
+        def passedTestPair = new AbstractMap.SimpleEntry<>("Passed", true)
+        def failedTestPair = new AbstractMap.SimpleEntry<>("Failed", false)
+        def testData = Collections.nCopies(countPassed, passedTestPair) + Collections.nCopies(countFailed, failedTestPair)
+
+        when: "Generate the summary format"
+        def failedTestData = reporter.getFailedTests(testData)
+
+        then: "The format must be the same"
+        failedTestData.every({ it.getKey() == "Failed" && it.getValue() == false})
+        expectedFailedCount == failedTestData.size()
+
+        where: "Possible variants of tests"
+        countPassed | countFailed || expectedFailedCount
+        5           | 10          || 10
+    }
+
+    def "Count function returns the count of passed or failed tests."() {
+        given: "I have a reporter"
+        @Subject
+        def reporter = new CLIReporter(null, null)
+
+        and: "I have a testData"
+        def passedTestPair = new AbstractMap.SimpleEntry<>("Passed", true)
+        def failedTestPair = new AbstractMap.SimpleEntry<>("Failed", false)
+        def testData = Collections.nCopies(countPassed, passedTestPair) + Collections.nCopies(countFailed, failedTestPair)
+
+        when: "Generate the summary format"
+        def count = reporter.count(testData, isPassed)
+
+        then: "The format must be the same"
+        expectedCount == count
+
+        where: "Possible variants of tests"
+        countPassed | countFailed | isPassed || expectedCount
+        10          | 20          | true     || 10
+        10          | 20          | false    || 20
+    }
+
+    def "Summary format."() {
+        given: "I have a reporter"
+        @Subject
+        def reporter = new CLIReporter(null, null)
+
+        when: "Generate the summary format"
+        def format = reporter.summary(passed, failed)
+
+        then: "The format must be the same"
+        expectedFormat == format
+
+        where: "Possible variants of tests"
+        passed | failed || expectedFormat
+        10     | 20     || "Ran 30 tests.\nPassed: 10 (33.33%)\nFailed: 20 (66.67%)\n"
+        10     | 10     || "Ran 20 tests.\nPassed: 10 (50.00%)\nFailed: 10 (50.00%)\n"
+    }
+}
+

src/test/groovy/space/kklochko/simple_jbdd/tests/reports/fmt/SimpleTestReportFormatterSpec.groovy

@@ -0,0 +1,68 @@
+package space.kklochko.simple_jbdd.tests.reports.fmt
+
+import space.kklochko.simple_jbdd.test_examples.tests.SimpleFailedThenTest
+import space.kklochko.simple_jbdd.test_examples.tests.SimpleGivenWhenThenTest
+import space.kklochko.simple_jbdd.test_examples.tests.SimpleThenTest
+import space.kklochko.simple_jbdd.test_examples.tests.SimpleThenTestWithoutTitle
+import space.kklochko.simple_jbdd.tests.commands.AbstractTestCommand
+import space.kklochko.simple_jbdd.tests.commands.decorators.BlockDecorator
+import space.kklochko.simple_jbdd.tests.factories.meta.TestCommandMetaDataFactory
+import spock.lang.Narrative
+import spock.lang.Specification
+import spock.lang.Subject
+import spock.lang.Title
+
+@Narrative("""The formatter must generate a format for the test command metadata, so
+those tests check if the formatter generate it right.
+""")
+@Title("Unit tests for SimpleTestReportFormatter")
+class SimpleTestReportFormatterSpec extends Specification {
+    def "If the map of methods have one test block."() {
+        given: "I have a metaData"
+        def metaData = [
+            new AbstractMap.SimpleEntry<>("Title", "A simple test"),
+            new AbstractMap.SimpleEntry<>("Then", "Then block")
+        ]
+
+        and: "I have the formatter object"
+        @Subject
+        def formatter = new SimpleTestReportFormatter(metaData, isPassed)
+
+        when: "Generate the format"
+        def format = formatter.format()
+
+        then: "The format must be the same"
+        expectedFormat == format
+
+        where: "Possible variants of tests"
+        isPassed || expectedFormat
+        true     || "✓ A simple test\n\tThen: Then block\n\n"
+        false    || "⨯ A simple test\n\tThen: Then block\n\n"
+    }
+
+    def "If the map of methods have GivenWhenThen blocks."() {
+        given: "I have a metaData"
+        def metaData = [
+            new AbstractMap.SimpleEntry<>("Title", "A simple test"),
+            new AbstractMap.SimpleEntry<>("Given", "Given block"),
+            new AbstractMap.SimpleEntry<>("When", "When block"),
+            new AbstractMap.SimpleEntry<>("Then", "Then block")
+        ]
+
+        and: "I have the formatter object"
+        @Subject
+        def formatter = new SimpleTestReportFormatter(metaData, isPassed)
+
+        when: "Generate the format"
+        def format = formatter.format()
+
+        then: "The format must be the same"
+        expectedFormat == format
+
+        where: "Possible variants of tests"
+        isPassed || expectedFormat
+        true     || "✓ A simple test\n\tGiven: Given block\n\tWhen: When block\n\tThen: Then block\n\n"
+        false    || "⨯ A simple test\n\tGiven: Given block\n\tWhen: When block\n\tThen: Then block\n\n"
+    }
+}
+

src/test/groovy/space/kklochko/simple_jbdd/tests/runners/IntegratedSimpleTestRunnerSpec.groovy

@@ -1,6 +1,8 @@
 package space.kklochko.simple_jbdd.tests.runners
 
+import space.kklochko.simple_jbdd.test_examples.tests.SimpleEmptyTest
 import space.kklochko.simple_jbdd.test_examples.tests.SimpleFailedThenTest
+import space.kklochko.simple_jbdd.test_examples.tests.SimpleGivenGivenWhenWhenThenThenTest
 import space.kklochko.simple_jbdd.test_examples.tests.SimpleGivenWhenThenTest
 import space.kklochko.simple_jbdd.test_examples.tests.SimpleThenTest
 import space.kklochko.simple_jbdd.test_examples.tests.SimpleThenTestWithoutTitle
@@ -33,10 +35,12 @@ class IntegratedSimpleTestRunnerSpec extends Specification {
         result == expectedResult
 
         where: "Possible variants of tests"
-        testObject                       || expectedResult
+        testObject                                 || expectedResult
-        new SimpleThenTest()             || true
+        new SimpleThenTest()                       || true
-        new SimpleGivenWhenThenTest()    || true
+        new SimpleGivenWhenThenTest()              || true
-        new SimpleThenTestWithoutTitle() || true
+        new SimpleThenTestWithoutTitle()           || true
-        new SimpleFailedThenTest()       || false
+        new SimpleFailedThenTest()                 || false
+        new SimpleGivenGivenWhenWhenThenThenTest() || true
+        new SimpleEmptyTest()                      || false
     }
 }