Update the TestCommandFactory to have the validators.

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

@@ -9,6 +9,7 @@ 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;
@@ -21,8 +22,18 @@ public class TestCommandFactory {
 
         AbstractTestCommand<Test> aTestCommand = createTest(aClass, input);
 
-        if(test_methods.size() == 0)
-            return new ErrorDecorator("ERROR!!! No blocks!!!", aTestCommand, "Error");
+        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")) {
             ArrayList<Method> thens = getMethodsInReverseOrder(test_methods, "Then");