class ElementsTableSelectTest

class ElementsTableSelectTest extends BrowserTestBase {
    
    /**
     * Modules to enable.
     *
     * @var array
     */
    protected static $modules = [
        'form_test',
    ];
    
    /**
     * {@inheritdoc}
     */
    protected $defaultTheme = 'stark';
    
    /**
     * Tests the display of checkboxes when #multiple is TRUE.
     */
    public function testMultipleTrue() : void {
        $this->drupalGet('form_test/tableselect/multiple-true');
        $this->assertSession()
            ->responseNotContains('Empty text.');
        // Test for the presence of the Select all rows tableheader.
        $this->assertSession()
            ->elementExists('xpath', '//th[@class="select-all"]');
        $rows = [
            'row1',
            'row2',
            'row3',
        ];
        foreach ($rows as $row) {
            $this->assertSession()
                ->elementExists('xpath', '//input[@type="checkbox"]');
        }
    }
    
    /**
     * Tests the display of radios when #multiple is FALSE.
     */
    public function testMultipleFalse() : void {
        $this->drupalGet('form_test/tableselect/multiple-false');
        $this->assertSession()
            ->pageTextNotContains('Empty text.');
        // Test for the absence of the Select all rows tableheader.
        $this->assertSession()
            ->elementNotExists('xpath', '//th[@class="select-all"]');
        $rows = [
            'row1',
            'row2',
            'row3',
        ];
        foreach ($rows as $row) {
            $this->assertSession()
                ->elementExists('xpath', '//input[@type="radio"]');
        }
    }
    
    /**
     * Tests the display when #colspan is set.
     */
    public function testTableSelectColSpan() : void {
        $this->drupalGet('form_test/tableselect/colspan');
        // Verify presence of column three and absence of column four.
        $this->assertSession()
            ->pageTextContains('Three');
        $this->assertSession()
            ->pageTextNotContains('Four');
        // There should be three labeled column headers and 1 for the input.
        $this->assertSession()
            ->elementsCount('xpath', '//thead/tr/th', 4);
        // The first two body rows should each have 5 table cells: One for the
        // radio, one cell in the first column, one cell in the second column,
        // and two cells in the third column which has colspan 2.
        for ($i = 0; $i <= 1; $i++) {
            $this->assertSession()
                ->elementsCount('xpath', '//tbody/tr[' . ($i + 1) . ']/td', 5);
        }
        // The third row should have 3 cells, one for the radio, one spanning the
        // first and second column, and a third in column 3 (which has colspan 3).
        $this->assertSession()
            ->elementsCount('xpath', '//tbody/tr[3]/td', 3);
    }
    
    /**
     * Tests the display of the #empty text when #options is an empty array.
     */
    public function testEmptyText() : void {
        $this->drupalGet('form_test/tableselect/empty-text');
        $this->assertSession()
            ->pageTextContains('Empty text.');
    }
    
    /**
     * Tests the submission of single and multiple values when #multiple is TRUE.
     */
    public function testMultipleTrueSubmit() : void {
        // Test a submission with one checkbox checked.
        $edit = [];
        $edit['tableselect[row1]'] = TRUE;
        $this->drupalGet('form_test/tableselect/multiple-true');
        $this->submitForm($edit, 'Submit');
        $assert_session = $this->assertSession();
        $assert_session->pageTextContains('Submitted: row1 = row1');
        $assert_session->pageTextContains('Submitted: row2 = 0');
        $assert_session->pageTextContains('Submitted: row3 = 0');
        // Test a submission with multiple checkboxes checked.
        $edit['tableselect[row1]'] = TRUE;
        $edit['tableselect[row3]'] = TRUE;
        $this->drupalGet('form_test/tableselect/multiple-true');
        $this->submitForm($edit, 'Submit');
        $assert_session->pageTextContains('Submitted: row1 = row1');
        $assert_session->pageTextContains('Submitted: row2 = 0');
        $assert_session->pageTextContains('Submitted: row3 = row3');
    }
    
    /**
     * Tests submission of values when #multiple is FALSE.
     */
    public function testMultipleFalseSubmit() : void {
        $edit['tableselect'] = 'row1';
        $this->drupalGet('form_test/tableselect/multiple-false');
        $this->submitForm($edit, 'Submit');
        $this->assertSession()
            ->pageTextContains('Submitted: row1');
    }
    
    /**
     * Tests the #js_select property.
     */
    public function testAdvancedSelect() : void {
        // When #multiple = TRUE a Select all checkbox should be displayed by default.
        $this->drupalGet('form_test/tableselect/advanced-select/multiple-true-default');
        $this->assertSession()
            ->elementExists('xpath', '//th[@class="select-all"]');
        // When #js_select is set to FALSE, a "Select all" checkbox should not be displayed.
        $this->drupalGet('form_test/tableselect/advanced-select/multiple-true-no-advanced-select');
        $this->assertSession()
            ->elementNotExists('xpath', '//th[@class="select-all"]');
        // A "Select all" checkbox never makes sense when #multiple = FALSE, regardless of the value of #js_select.
        $this->drupalGet('form_test/tableselect/advanced-select/multiple-false-default');
        $this->assertSession()
            ->elementNotExists('xpath', '//th[@class="select-all"]');
        $this->drupalGet('form_test/tableselect/advanced-select/multiple-false-advanced-select');
        $this->assertSession()
            ->elementNotExists('xpath', '//th[@class="select-all"]');
    }
    
    /**
     * Tests error handling for invalid tableselect values with checkboxes.
     */
    public function testMultipleTrueOptionChecker() : void {
        [
            $header,
            $options,
        ] = _form_test_tableselect_get_data();
        $form['tableselect'] = [
            '#type' => 'tableselect',
            '#header' => $header,
            '#options' => $options,
        ];
        // Test with a valid value.
        [
            ,
            ,
            $errors,
        ] = $this->formSubmitHelper($form, [
            'tableselect' => [
                'row1' => 'row1',
            ],
        ]);
        $this->assertFalse(isset($errors['tableselect']), 'Option checker allows valid values for checkboxes.');
        // Test with an invalid value.
        [
            ,
            ,
            $errors,
        ] = $this->formSubmitHelper($form, [
            'tableselect' => [
                'non_existing_value' => 'non_existing_value',
            ],
        ]);
        $this->assertTrue(isset($errors['tableselect']), 'Option checker disallows invalid values for checkboxes.');
    }
    
    /**
     * Tests error handling for invalid tableselect values with radio buttons.
     */
    public function testMultipleFalseOptionChecker() : void {
        [
            $header,
            $options,
        ] = _form_test_tableselect_get_data();
        $form['tableselect'] = [
            '#type' => 'tableselect',
            '#header' => $header,
            '#options' => $options,
            '#multiple' => FALSE,
        ];
        // Test with a valid value.
        [
            ,
            ,
            $errors,
        ] = $this->formSubmitHelper($form, [
            'tableselect' => 'row1',
        ]);
        $this->assertFalse(isset($errors['tableselect']), 'Option checker allows valid values for radio buttons.');
        // Test with an invalid value.
        [
            ,
            ,
            $errors,
        ] = $this->formSubmitHelper($form, [
            'tableselect' => 'non_existing_value',
        ]);
        $this->assertTrue(isset($errors['tableselect']), 'Option checker disallows invalid values for radio buttons.');
    }
    
    /**
     * Helper function for the option check test to submit a form while collecting errors.
     *
     * @param array $form
     *   Nested array of form elements that comprise the form.
     * @param array $edit
     *   An array containing post data.
     *
     * @return array
     *   An array containing the processed form, the form_state and any errors.
     *
     * @internal param $form_element A form element to test.
     *   A form element to test.
     */
    private function formSubmitHelper($form, $edit) {
        $form_id = $this->randomMachineName();
        $form_state = new FormState();
        $form['op'] = [
            '#type' => 'submit',
            '#value' => 'Submit',
        ];
        // The form token CSRF protection should not interfere with this test, so we
        // bypass it by setting the token to FALSE.
        $form['#token'] = FALSE;
        $edit['form_id'] = $form_id;
        // Disable page redirect for forms submitted programmatically. This is a
        // solution to skip the redirect step (there are no pages, then the redirect
        // isn't possible).
        $form_state->disableRedirect();
        $form_state->setUserInput($edit);
        $form_state->setFormObject(new StubForm($form_id, $form));
        \Drupal::formBuilder()->prepareForm($form_id, $form, $form_state);
        \Drupal::formBuilder()->processForm($form_id, $form, $form_state);
        $errors = $form_state->getErrors();
        // Clear errors and messages.
        \Drupal::messenger()->deleteAll();
        $form_state->clearErrors();
        // Return the processed form together with form_state and errors
        // to allow the caller low-level access to the form.
        return [
            $form,
            $form_state,
            $errors,
        ];
    }

}