HookRequirementsTest.php in Drupal 8        
                          
                  
                        
  
  
  
  
File
  core/modules/system/tests/src/Functional/Module/HookRequirementsTest.php
  
    View source  
  <?php
namespace Drupal\Tests\system\Functional\Module;
class HookRequirementsTest extends ModuleTestBase {
  
  protected $defaultTheme = 'stark';
  
  public function testHookRequirementsFailure() {
    $this
      ->assertModules([
      'requirements1_test',
    ], FALSE);
    
    $edit = [];
    $edit['modules[requirements1_test][enable]'] = 'requirements1_test';
    $this
      ->drupalPostForm('admin/modules', $edit, t('Install'));
    
    $this
      ->assertText(t('Requirements 1 Test failed requirements'), 'Modules status has been updated.');
    $this
      ->assertModules([
      'requirements1_test',
    ], FALSE);
  }
}