class EntityReferenceAutocompleteWidgetTest

class EntityReferenceAutocompleteWidgetTest extends WebDriverTestBase {
    use ContentTypeCreationTrait;
    use EntityReferenceTestTrait;
    use NodeCreationTrait;
    
    /**
     * {@inheritdoc}
     */
    public static $modules = [
        'node',
        'field_ui',
    ];
    
    /**
     * {@inheritdoc}
     */
    protected $defaultTheme = 'stark';
    
    /**
     * {@inheritdoc}
     */
    protected function setUp() {
        parent::setUp();
        // Create a Content type and two test nodes.
        $this->createContentType([
            'type' => 'page',
        ]);
        $this->createNode([
            'title' => 'Test page',
        ]);
        $this->createNode([
            'title' => 'Page test',
        ]);
        $user = $this->drupalCreateUser([
            'access content',
            'create page content',
        ]);
        $this->drupalLogin($user);
    }
    
    /**
     * Tests that the default autocomplete widget return the correct results.
     */
    public function testEntityReferenceAutocompleteWidget() {
        
        /** @var \Drupal\Core\Entity\EntityDisplayRepositoryInterface $display_repository */
        $display_repository = \Drupal::service('entity_display.repository');
        // Create an entity reference field and use the default 'CONTAINS' match
        // operator.
        $field_name = 'field_test';
        $this->createEntityReferenceField('node', 'page', $field_name, $field_name, 'node', 'default', [
            'target_bundles' => [
                'page',
            ],
            'sort' => [
                'field' => 'title',
                'direction' => 'DESC',
            ],
        ]);
        $form_display = $display_repository->getFormDisplay('node', 'page');
        $form_display->setComponent($field_name, [
            'type' => 'entity_reference_autocomplete',
            'settings' => [
                'match_operator' => 'CONTAINS',
            ],
        ]);
        // To satisfy config schema, the size setting must be an integer, not just
        // a numeric value. See https://www.drupal.org/node/2885441.
        $this->assertIsInt($form_display->getComponent($field_name)['settings']['size']);
        $form_display->save();
        $this->assertIsInt($form_display->getComponent($field_name)['settings']['size']);
        // Visit the node add page.
        $this->drupalGet('node/add/page');
        $page = $this->getSession()
            ->getPage();
        $assert_session = $this->assertSession();
        $autocomplete_field = $assert_session->waitForElement('css', '[name="' . $field_name . '[0][target_id]"].ui-autocomplete-input');
        $autocomplete_field->setValue('Test');
        $this->getSession()
            ->getDriver()
            ->keyDown($autocomplete_field->getXpath(), ' ');
        $assert_session->waitOnAutocomplete();
        $results = $page->findAll('css', '.ui-autocomplete li');
        $this->assertCount(2, $results);
        $assert_session->pageTextContains('Test page');
        $assert_session->pageTextContains('Page test');
        // Now switch the autocomplete widget to the 'STARTS_WITH' match operator.
        $display_repository->getFormDisplay('node', 'page')
            ->setComponent($field_name, [
            'type' => 'entity_reference_autocomplete',
            'settings' => [
                'match_operator' => 'STARTS_WITH',
            ],
        ])
            ->save();
        $this->drupalGet('node/add/page');
        $this->doAutocomplete($field_name);
        $results = $page->findAll('css', '.ui-autocomplete li');
        $this->assertCount(1, $results);
        $assert_session->pageTextContains('Test page');
        $assert_session->pageTextNotContains('Page test');
        // Change the size of the result set.
        $display_repository->getFormDisplay('node', 'page')
            ->setComponent($field_name, [
            'type' => 'entity_reference_autocomplete',
            'settings' => [
                'match_limit' => 1,
            ],
        ])
            ->save();
        $this->drupalGet('node/add/page');
        $this->doAutocomplete($field_name);
        $results = $page->findAll('css', '.ui-autocomplete li');
        $this->assertCount(1, $results);
        $assert_session->pageTextContains('Test page');
        $assert_session->pageTextNotContains('Page test');
        // Change the size of the result set via the UI.
        $this->drupalLogin($this->createUser([
            'access content',
            'administer content types',
            'administer node fields',
            'administer node form display',
            'create page content',
        ]));
        $this->drupalGet('/admin/structure/types/manage/page/form-display');
        $assert_session->pageTextContains('Autocomplete suggestion list size: 1');
        // Click on the widget settings button to open the widget settings form.
        $this->drupalPostForm(NULL, [], $field_name . "_settings_edit");
        $this->assertSession()
            ->waitForElement('css', sprintf('[name="fields[%s][settings_edit_form][settings][match_limit]"]', $field_name));
        $page->fillField('Number of results', 2);
        $page->pressButton('Save');
        $assert_session->pageTextContains('Your settings have been saved.');
        $assert_session->pageTextContains('Autocomplete suggestion list size: 2');
        $this->drupalGet('node/add/page');
        $this->doAutocomplete($field_name);
        $this->assertCount(2, $page->findAll('css', '.ui-autocomplete li'));
    }
    
    /**
     * Executes an autocomplete on a given field and waits for it to finish.
     *
     * @param string $field_name
     *   The field name.
     */
    protected function doAutocomplete($field_name) {
        $autocomplete_field = $this->getSession()
            ->getPage()
            ->findField($field_name . '[0][target_id]');
        $autocomplete_field->setValue('Test');
        $this->getSession()
            ->getDriver()
            ->keyDown($autocomplete_field->getXpath(), ' ');
        $this->assertSession()
            ->waitOnAutocomplete();
    }

}