class SimpletestTestForm

class SimpletestTestForm extends FormBase {
    
    /**
     * The renderer.
     *
     * @var \Drupal\Core\Render\RendererInterface
     */
    protected $renderer;
    
    /**
     * The test discovery service.
     *
     * @var \Drupal\simpletest\TestDiscovery
     */
    protected $testDiscovery;
    
    /**
     * {@inheritdoc}
     */
    public static function create(ContainerInterface $container) {
        return new static($container->get('renderer'), $container->get('test_discovery'));
    }
    
    /**
     * Constructs a new SimpletestTestForm.
     *
     * @param \Drupal\Core\Render\RendererInterface $renderer
     *   The renderer.
     * @param \Drupal\simpletest\TestDiscovery $test_discovery
     *   The test discovery service.
     */
    public function __construct(RendererInterface $renderer, TestDiscovery $test_discovery) {
        $this->renderer = $renderer;
        $this->testDiscovery = $test_discovery;
    }
    
    /**
     * {@inheritdoc}
     */
    public function getFormId() {
        return 'simpletest_test_form';
    }
    
    /**
     * {@inheritdoc}
     */
    public function buildForm(array $form, FormStateInterface $form_state) {
        $form['actions'] = [
            '#type' => 'actions',
        ];
        $form['actions']['submit'] = [
            '#type' => 'submit',
            '#value' => $this->t('Run tests'),
            '#tableselect' => TRUE,
            '#button_type' => 'primary',
        ];
        $form['clean'] = [
            '#type' => 'fieldset',
            '#title' => $this->t('Clean test environment'),
            '#description' => $this->t('Remove tables with the prefix "test" followed by digits and temporary directories that are left over from tests that crashed. This is intended for developers when creating tests.'),
            '#weight' => 200,
        ];
        $form['clean']['op'] = [
            '#type' => 'submit',
            '#value' => $this->t('Clean environment'),
            '#submit' => [
                'simpletest_clean_environment',
            ],
        ];
        // Do not needlessly re-execute a full test discovery if the user input
        // already contains an explicit list of test classes to run.
        $user_input = $form_state->getUserInput();
        if (!empty($user_input['tests'])) {
            return $form;
        }
        // JavaScript-only table filters.
        $form['filters'] = [
            '#type' => 'container',
            '#attributes' => [
                'class' => [
                    'table-filter',
                    'js-show',
                ],
            ],
        ];
        $form['filters']['text'] = [
            '#type' => 'search',
            '#title' => $this->t('Search'),
            '#size' => 30,
            '#placeholder' => $this->t('Enter test name…'),
            '#attributes' => [
                'class' => [
                    'table-filter-text',
                ],
                'data-table' => '#simpletest-test-form',
                'autocomplete' => 'off',
                'title' => $this->t('Enter at least 3 characters of the test name or description to filter by.'),
            ],
        ];
        $form['tests'] = [
            '#cache' => [
                'keys' => [
                    'simpletest_ui_table',
                ],
                'contexts' => [
                    'test_discovery',
                ],
            ],
            '#type' => 'table',
            '#id' => 'simpletest-form-table',
            '#tableselect' => TRUE,
            '#header' => [
                [
                    'data' => $this->t('Test'),
                    'class' => [
                        'simpletest-test-label',
                    ],
                ],
                [
                    'data' => $this->t('Description'),
                    'class' => [
                        'simpletest-test-description',
                    ],
                ],
            ],
            '#empty' => $this->t('No tests to display.'),
            '#attached' => [
                'library' => [
                    'simpletest/drupal.simpletest',
                ],
            ],
        ];
        // Define the images used to expand/collapse the test groups.
        $image_collapsed = [
            '#theme' => 'image',
            '#uri' => 'core/misc/menu-collapsed.png',
            '#width' => '7',
            '#height' => '7',
            '#alt' => $this->t('Expand'),
            '#title' => $this->t('Expand'),
            '#suffix' => '<a href="#" class="simpletest-collapse">(' . $this->t('Expand') . ')</a>',
        ];
        $image_extended = [
            '#theme' => 'image',
            '#uri' => 'core/misc/menu-expanded.png',
            '#width' => '7',
            '#height' => '7',
            '#alt' => $this->t('Collapse'),
            '#title' => $this->t('Collapse'),
            '#suffix' => '<a href="#" class="simpletest-collapse">(' . $this->t('Collapse') . ')</a>',
        ];
        $form['tests']['#attached']['drupalSettings']['simpleTest']['images'] = [
            (string) $this->renderer
                ->renderPlain($image_collapsed),
            (string) $this->renderer
                ->renderPlain($image_extended),
        ];
        // Generate the list of tests arranged by group.
        $groups = $this->testDiscovery
            ->getTestClasses();
        foreach ($groups as $group => $tests) {
            $form['tests'][$group] = [
                '#attributes' => [
                    'class' => [
                        'simpletest-group',
                    ],
                ],
            ];
            // Make the class name safe for output on the page by replacing all
            // non-word/decimal characters with a dash (-).
            $group_class = 'module-' . strtolower(trim(preg_replace("/[^\\w\\d]/", "-", $group)));
            // Override tableselect column with custom selector for this group.
            // This group-select-all checkbox is injected via JavaScript.
            $form['tests'][$group]['select'] = [
                '#wrapper_attributes' => [
                    'id' => $group_class,
                    'class' => [
                        'simpletest-group-select-all',
                    ],
                ],
            ];
            $form['tests'][$group]['title'] = [
                // Expand/collapse image.
'#prefix' => '<div class="simpletest-image" id="simpletest-test-group-' . $group_class . '"></div>',
                '#markup' => '<label for="' . $group_class . '-group-select-all">' . $group . '</label>',
                '#wrapper_attributes' => [
                    'class' => [
                        'simpletest-group-label',
                    ],
                ],
            ];
            $form['tests'][$group]['description'] = [
                '#markup' => '&nbsp;',
                '#wrapper_attributes' => [
                    'class' => [
                        'simpletest-group-description',
                    ],
                ],
            ];
            // Cycle through each test within the current group.
            foreach ($tests as $class => $info) {
                $form['tests'][$class] = [
                    '#attributes' => [
                        'class' => [
                            $group_class . '-test',
                            'js-hide',
                        ],
                    ],
                ];
                $form['tests'][$class]['title'] = [
                    '#type' => 'label',
                    '#title' => '\\' . $info['name'],
                    '#wrapper_attributes' => [
                        'class' => [
                            'simpletest-test-label',
                            'table-filter-text-source',
                        ],
                    ],
                ];
                $form['tests'][$class]['description'] = [
                    '#prefix' => '<div class="description">',
                    '#plain_text' => $info['description'],
                    '#suffix' => '</div>',
                    '#wrapper_attributes' => [
                        'class' => [
                            'simpletest-test-description',
                            'table-filter-text-source',
                        ],
                    ],
                ];
            }
        }
        return $form;
    }
    
    /**
     * {@inheritdoc}
     */
    public function submitForm(array &$form, FormStateInterface $form_state) {
        // Test discovery does not run upon form submission.
        $this->testDiscovery
            ->registerTestNamespaces();
        // This form accepts arbitrary user input for 'tests'.
        // An invalid value will cause the $class_name lookup below to die with a
        // fatal error. Regular user access mechanisms to this form are intact.
        // The only validation effectively being skipped is the validation of
        // available checkboxes vs. submitted checkboxes.
        // @todo Refactor Form API to allow to POST values without constructing the
        //   entire form more easily, BUT retaining routing access security and
        //   retaining Form API CSRF #token security validation, and without having
        //   to rely on form caching.
        $user_input = $form_state->getUserInput();
        if ($form_state->isValueEmpty('tests') && !empty($user_input['tests'])) {
            $form_state->setValue('tests', $user_input['tests']);
        }
        $tests_list = array_filter($form_state->getValue('tests'));
        if (!empty($tests_list)) {
            $test_id = simpletest_run_tests($tests_list, 'drupal');
            $form_state->setRedirect('simpletest.result_form', [
                'test_id' => $test_id,
            ]);
        }
    }

}