HookRequirementsTest.php

<?php

namespace Drupal\Tests\system\Functional\Module;


/**
 * Attempts enabling a module that fails hook_requirements('install').
 *
 * @group Module
 */
class HookRequirementsTest extends ModuleTestBase {
  
  /**
   * {@inheritdoc}
   */
  protected $defaultTheme = 'stark';
  
  /**
   * Assert that a module cannot be installed if it fails hook_requirements().
   */
  public function testHookRequirementsFailure() {
    $this->assertModules([
      'requirements1_test',
    ], FALSE);
    // Attempt to install the requirements1_test module.
    $edit = [];
    $edit['modules[requirements1_test][enable]'] = 'requirements1_test';
    $this->drupalPostForm('admin/modules', $edit, t('Install'));
    // Makes sure the module was NOT installed.
    $this->assertText(t('Requirements 1 Test failed requirements'), 'Modules status has been updated.');
    $this->assertModules([
      'requirements1_test',
    ], FALSE);
  }

}