function FormValuesTest::testSimpleAjaxFormValue

Submits forms with select and checkbox elements via Ajax.

File

core/tests/Drupal/FunctionalJavascriptTests/Ajax/FormValuesTest.php, line 36

Class

FormValuesTest

Tests that form values are properly delivered to AJAX callbacks.

Namespace

Code

public function testSimpleAjaxFormValue() {
    $this->drupalGet('ajax_forms_test_get_form');
    $session = $this->getSession();
    $assertSession = $this->assertSession();
    // Verify form values of a select element.
    foreach ([
        'green',
        'blue',
        'red',
    ] as $item) {
        // Updating the field will trigger an AJAX request/response.
        $session->getPage()
            ->selectFieldOption('select', $item);
        // The AJAX command in the response will update the DOM
        $select = $assertSession->waitForElement('css', "div#ajax_selected_color:contains('{$item}')");
        $this->assertNotNull($select, "DataCommand has updated the page with a value of {$item}.");
    }
    // Verify form values of a checkbox element.
    $session->getPage()
        ->checkField('checkbox');
    $div0 = $this->assertSession()
        ->waitForElement('css', "div#ajax_checkbox_value:contains('checked')");
    $this->assertNotNull($div0, 'DataCommand updates the DOM as expected when a checkbox is selected');
    $session->getPage()
        ->uncheckField('checkbox');
    $div1 = $this->assertSession()
        ->waitForElement('css', "div#ajax_checkbox_value:contains('unchecked')");
    $this->assertNotNull($div1, 'DataCommand updates the DOM as expected when a checkbox is de-selected');
    // Verify that AJAX elements with invalid callbacks return error code 500.
    // Ensure the test error log is empty before these tests.
    $this->assertFileDoesNotExist(DRUPAL_ROOT . '/' . $this->siteDirectory . '/error.log');
    // We don't need to check for the X-Drupal-Ajax-Token header with these
    // invalid requests.
    foreach ([
        'null',
        'empty',
        'nonexistent',
    ] as $key) {
        $element_name = 'select_' . $key . '_callback';
        // Updating the field will trigger an AJAX request/response.
        $session->getPage()
            ->selectFieldOption($element_name, 'green');
        // The select element is disabled as the AJAX request is issued.
        $this->assertSession()
            ->waitForElement('css', "select[name=\"{$element_name}\"]:disabled");
        // The select element is enabled as the response is received.
        $this->assertSession()
            ->waitForElement('css', "select[name=\"{$element_name}\"]:enabled");
        $this->assertFileExists(DRUPAL_ROOT . '/' . $this->siteDirectory . '/error.log');
        $this->assertStringContainsString('"The specified #ajax callback is empty or not callable."', file_get_contents(DRUPAL_ROOT . '/' . $this->siteDirectory . '/error.log'));
        // The exceptions are expected. Do not interpret them as a test failure.
        // Not using File API; a potential error must trigger a PHP warning.
        unlink(\Drupal::root() . '/' . $this->siteDirectory . '/error.log');
    }
    // We need to reload the page to kill any unfinished AJAX calls before
    // tearDown() is called.
    $this->drupalGet('ajax_forms_test_get_form');
}