Refactor the Company and its validator test.

tests/Feature/Validation/CompanyValidationTest.php

@@ -0,0 +1,35 @@
+<?php
+
+namespace Tests\Feature;
+
+use Tests\TestCase;
+
+use App\Models\Company;
+
+class CompanyValidationTest extends TestCase
+{
+    public function testCompanyWithEmptyName(): void
+    {
+        $json = Company::validateWithName('');
+
+        $this->assertEquals($json['error'], 'The company name is empty, please, write the name!!!');
+    }
+
+    public function testNotExistingCompanyWithName(): void
+    {
+        $name = '404 Company';
+
+        $json = Company::validateWithName($name);
+
+        $this->assertEquals($json['error'], 'A company with the name does not exist!!!');
+    }
+
+    public function testValidCompanyWithName(): void
+    {
+        $name = 'testCompany';
+
+        $json = Company::validateWithName($name);
+
+        $this->assertEquals($json['ok'], 'A company with the name is valid.');
+    }
+}