function FormTest::testDisabledElements

Tests handling of disabled elements.

See also

_form_test_disabled_elements()

File

core/modules/system/tests/src/Functional/Form/FormTest.php, line 734

Class

FormTest

Tests various form element validation mechanisms.

Namespace

Code

public function testDisabledElements() : void {
    // Get the raw form in its original state.
    $form_state = new FormState();
    $form = (new FormTestDisabledElementsForm())->buildForm([], $form_state);
    // Build a submission that tries to hijack the form by submitting input for
    // elements that are disabled.
    $edit = [];
    foreach (Element::children($form) as $key) {
        if (isset($form[$key]['#test_hijack_value'])) {
            if (is_array($form[$key]['#test_hijack_value'])) {
                foreach ($form[$key]['#test_hijack_value'] as $subkey => $value) {
                    $edit[$key . '[' . $subkey . ']'] = $value;
                }
            }
            else {
                $edit[$key] = $form[$key]['#test_hijack_value'];
            }
        }
    }
    // Submit the form with no input, as the browser does for disabled elements,
    // and fetch the $form_state->getValues() that is passed to the submit handler.
    $this->drupalGet('form-test/disabled-elements');
    $this->submitForm([], 'Submit');
    $returned_values['normal'] = Json::decode($this->getSession()
        ->getPage()
        ->getContent());
    // Do the same with input, as could happen if JavaScript un-disables an
    // element. submitForm() emulates a browser by not submitting input for
    // disabled elements, so we need to un-disable those elements first.
    $this->drupalGet('form-test/disabled-elements');
    $disabled_elements = [];
    foreach ($this->xpath('//*[@disabled]') as $element) {
        $disabled_elements[] = (string) $element->getAttribute('name');
    }
    // All the elements should be marked as disabled, including the ones below
    // the disabled container.
    $actual_count = count($disabled_elements);
    $expected_count = 44;
    $this->assertEquals($expected_count, $actual_count, sprintf('Found %s elements with disabled property (expected %s).', count($disabled_elements), $expected_count));
    // Mink does not "see" hidden elements, so we need to set the value of the
    // hidden element directly.
    $this->assertSession()
        ->elementExists('css', 'input[name="hidden"]')
        ->setValue($edit['hidden']);
    unset($edit['hidden']);
    $this->submitForm($edit, 'Submit');
    $returned_values['hijacked'] = Json::decode($this->getSession()
        ->getPage()
        ->getContent());
    // Ensure that the returned values match the form's default values in both
    // cases.
    foreach ($returned_values as $values) {
        $this->assertFormValuesDefault($values, $form);
    }
}