function DependentDropdownTest::testDependentDropdown

Test the dependent dropdown form with AJAX.

File

modules/ajax_example/tests/src/FunctionalJavascript/DependentDropdownTest.php, line 30

Class

DependentDropdownTest

Functional test of dependent dropdown example.

Namespace

Code

public function testDependentDropdown() {
    // Get the Mink stuff.
    $assert = $this->assertSession();
    $page = $this->getSession()
        ->getPage();
    // Get a URL object for the form, specifying AJAX.
    $dropdown_url = Url::fromRoute('ajax_example.dependent_dropdown');
    // Get the form.
    $this->drupalGet($dropdown_url);
    // Check for the initial state.
    $assert->fieldDisabled('instrument_dropdown');
    $assert->fieldValueEquals('instrument_dropdown', 'none');
    $submit_button = $page->findButton('edit-submit');
    $this->assertTrue($submit_button->hasAttribute('disabled'));
    // Run through the matrix of families.
    $families = [
        'String' => [
            'Violin',
            'Viola',
            'Cello',
            'Double Bass',
        ],
        'Woodwind' => [
            'Flute',
            'Clarinet',
            'Oboe',
            'Bassoon',
        ],
        'Brass' => [
            'Trumpet',
            'Trombone',
            'French Horn',
            'Euphonium',
        ],
        'Percussion' => [
            'Bass Drum',
            'Timpani',
            'Snare Drum',
            'Tambourine',
        ],
    ];
    foreach ($families as $family => $instruments) {
        // Select a family.
        $family_dropdown = $assert->fieldExists('instrument_family_dropdown');
        $family_dropdown->setValue($family);
        $assert->assertWaitOnAjaxRequest();
        // Get the instrument dropdown elements.
        $instrument_options = $page->findAll('css', 'select[name="instrument_dropdown"] option');
        $this->assertCount(count($instruments), $instrument_options);
        // Make sure all the instruments are in the select dropdown.
        foreach ($instrument_options as $instrument) {
            $this->assertContains($instrument->getAttribute('value'), $instruments);
        }
        // Post each instrument.
        foreach ($instruments as $instrument) {
            $this->drupalGet($dropdown_url);
            $assert->selectExists('instrument_family_dropdown')
                ->selectOption($family);
            $assert->assertWaitOnAjaxRequest();
            $assert->selectExists('instrument_dropdown')
                ->selectOption($instrument);
            $assert->buttonExists('Submit')
                ->press();
            $assert->pageTextContains("Your values have been submitted. Instrument family: {$family}, Instrument: {$instrument}");
        }
    }
}