class ManageDisplayTest

class ManageDisplayTest extends BrowserTestBase {
    use FieldUiTestTrait;
    
    /**
     * Modules to install.
     *
     * @var array
     */
    protected static $modules = [
        'node',
        'field_ui',
        'taxonomy',
        'search',
        'field_test',
        'field_third_party_test',
        'block',
    ];
    
    /**
     * {@inheritdoc}
     */
    protected $defaultTheme = 'stark';
    
    /**
     * @var string
     */
    private $type;
    
    /**
     * @var string
     */
    private $vocabulary;
    
    /**
     * {@inheritdoc}
     */
    protected function setUp() : void {
        parent::setUp();
        $this->drupalPlaceBlock('system_breadcrumb_block');
        $this->drupalPlaceBlock('local_tasks_block');
        // Create a test user.
        $admin_user = $this->drupalCreateUser([
            'access content',
            'administer content types',
            'administer node fields',
            'administer node form display',
            'administer node display',
            'administer taxonomy',
            'administer taxonomy_term fields',
            'administer taxonomy_term display',
            'administer users',
            'administer account settings',
            'administer user display',
            'bypass node access',
        ]);
        $this->drupalLogin($admin_user);
        // Create content type, with underscores.
        $type_name = strtolower($this->randomMachineName(8)) . '_test';
        $type = $this->drupalCreateContentType([
            'name' => $type_name,
            'type' => $type_name,
        ]);
        $this->type = $type->id();
        // Create a default vocabulary.
        $vocabulary = Vocabulary::create([
            'name' => $this->randomMachineName(),
            'description' => $this->randomMachineName(),
            'vid' => mb_strtolower($this->randomMachineName()),
            'langcode' => LanguageInterface::LANGCODE_NOT_SPECIFIED,
            'help' => '',
            'nodes' => [
                'article' => 'article',
            ],
            'weight' => mt_rand(0, 10),
        ]);
        $vocabulary->save();
        $this->vocabulary = $vocabulary->id();
    }
    
    /**
     * Tests switching view modes to use custom or 'default' settings'.
     */
    public function testViewModeCustom() {
        // Create a field, and a node with some data for the field.
        $this->fieldUIAddNewField('admin/structure/types/manage/' . $this->type, 'test', 'Test field');
        \Drupal::service('entity_field.manager')->clearCachedFieldDefinitions();
        // For this test, use a formatter setting value that is an integer unlikely
        // to appear in a rendered node other than as part of the field being tested
        // (for example, unlikely to be part of the "Submitted by ... on ..." line).
        $value = 12345;
        $settings = [
            'type' => $this->type,
            'field_test' => [
                [
                    'value' => $value,
                ],
            ],
        ];
        $node = $this->drupalCreateNode($settings);
        // Gather expected output values with the various formatters.
        $formatter_plugin_manager = \Drupal::service('plugin.manager.field.formatter');
        $field_test_default_settings = $formatter_plugin_manager->getDefaultSettings('field_test_default');
        $field_test_with_prepare_view_settings = $formatter_plugin_manager->getDefaultSettings('field_test_with_prepare_view');
        $output = [
            'field_test_default' => $field_test_default_settings['test_formatter_setting'] . '|' . $value,
            'field_test_with_prepare_view' => $field_test_with_prepare_view_settings['test_formatter_setting_additional'] . '|' . $value . '|' . ($value + 1),
        ];
        // Check that the field is displayed with the default formatter in 'rss'
        // mode (uses 'default'), and hidden in 'teaser' mode (uses custom settings).
        $this->assertNodeViewText($node, 'rss', $output['field_test_default'], "The field is displayed as expected in view modes that use 'default' settings.");
        $this->assertNodeViewNoText($node, 'teaser', $value, "The field is hidden in view modes that use custom settings.");
        // Change formatter for 'default' mode, check that the field is displayed
        // accordingly in 'rss' mode.
        $edit = [
            'fields[field_test][type]' => 'field_test_with_prepare_view',
            'fields[field_test][region]' => 'content',
        ];
        $this->drupalGet('admin/structure/types/manage/' . $this->type . '/display');
        $this->submitForm($edit, 'Save');
        $this->assertNodeViewText($node, 'rss', $output['field_test_with_prepare_view'], "The field is displayed as expected in view modes that use 'default' settings.");
        // Specialize the 'rss' mode, check that the field is displayed the same.
        $edit = [
            "display_modes_custom[rss]" => TRUE,
        ];
        $this->drupalGet('admin/structure/types/manage/' . $this->type . '/display');
        $this->submitForm($edit, 'Save');
        $this->assertNodeViewText($node, 'rss', $output['field_test_with_prepare_view'], "The field is displayed as expected in newly specialized 'rss' mode.");
        // Set the field to 'hidden' in the view mode, check that the field is
        // hidden.
        $edit = [
            'fields[field_test][region]' => 'hidden',
        ];
        $this->drupalGet('admin/structure/types/manage/' . $this->type . '/display/rss');
        $this->submitForm($edit, 'Save');
        $this->assertNodeViewNoText($node, 'rss', $value, "The field is hidden in 'rss' mode.");
        // Set the view mode back to 'default', check that the field is displayed
        // accordingly.
        $edit = [
            "display_modes_custom[rss]" => FALSE,
        ];
        $this->drupalGet('admin/structure/types/manage/' . $this->type . '/display');
        $this->submitForm($edit, 'Save');
        $this->assertNodeViewText($node, 'rss', $output['field_test_with_prepare_view'], "The field is displayed as expected when 'rss' mode is set back to 'default' settings.");
        // Specialize the view mode again.
        $edit = [
            "display_modes_custom[rss]" => TRUE,
        ];
        $this->drupalGet('admin/structure/types/manage/' . $this->type . '/display');
        $this->submitForm($edit, 'Save');
        // Check that the previous settings for the view mode have been kept.
        $this->assertNodeViewNoText($node, 'rss', $value, "The previous settings are kept when 'rss' mode is specialized again.");
    }
    
    /**
     * Tests the local tasks are displayed correctly for view modes.
     */
    public function testViewModeLocalTasks() {
        $manage_display = 'admin/structure/types/manage/' . $this->type . '/display';
        $this->drupalGet($manage_display);
        $this->assertSession()
            ->linkNotExists('Full content');
        $this->assertSession()
            ->linkExists('Teaser');
        $this->drupalGet($manage_display . '/teaser');
        $this->assertSession()
            ->linkNotExists('Full content');
        $this->assertSession()
            ->linkExists('Default');
    }
    
    /**
     * Tests that fields with no explicit display settings do not break.
     */
    public function testNonInitializedFields() {
        // Create a test field.
        $this->fieldUIAddNewField('admin/structure/types/manage/' . $this->type, 'test', 'Test');
        // Check that the field appears as 'hidden' on the 'Manage display' page
        // for the 'teaser' mode.
        $this->drupalGet('admin/structure/types/manage/' . $this->type . '/display/teaser');
        $this->assertSession()
            ->fieldValueEquals('fields[field_test][region]', 'hidden');
    }
    
    /**
     * Tests hiding the view modes fieldset when there's only one available.
     */
    public function testSingleViewMode() {
        $this->drupalGet('admin/structure/taxonomy/manage/' . $this->vocabulary . '/display');
        $this->assertSession()
            ->pageTextNotContains('Use custom display settings for the following view modes');
        // This may not trigger a notice when 'view_modes_custom' isn't available.
        $this->drupalGet('admin/structure/taxonomy/manage/' . $this->vocabulary . '/overview/display');
        $this->submitForm([], 'Save');
    }
    
    /**
     * Tests that a message is shown when there are no fields.
     */
    public function testNoFieldsDisplayOverview() {
        // Create a fresh content type without any fields.
        NodeType::create([
            'type' => 'no_fields',
            'name' => 'No fields',
        ])->save();
        $this->drupalGet('admin/structure/types/manage/no_fields/display');
        $this->assertSession()
            ->pageTextContains("There are no fields yet added. You can add new fields on the Manage fields page.");
        $this->assertSession()
            ->linkByHrefExists(Url::fromRoute('entity.node.field_ui_fields', [
            'node_type' => 'no_fields',
        ])->toString());
    }
    
    /**
     * Asserts that a string is found in the rendered node in a view mode.
     *
     * @param \Drupal\Core\Entity\EntityInterface $node
     *   The node.
     * @param string $view_mode
     *   The view mode in which the node should be displayed.
     * @param string $text
     *   Plain text to look for.
     * @param string $message
     *   Message to display.
     *
     * @internal
     */
    public function assertNodeViewText(EntityInterface $node, string $view_mode, string $text, string $message) : void {
        $this->assertNodeViewTextHelper($node, $view_mode, $text, $message, FALSE);
    }
    
    /**
     * Asserts that a string is not found in the rendered node in a view mode.
     *
     * @param \Drupal\Core\Entity\EntityInterface $node
     *   The node.
     * @param string $view_mode
     *   The view mode in which the node should be displayed.
     * @param string $text
     *   Plain text to look for.
     * @param string $message
     *   Message to display.
     *
     * @internal
     */
    public function assertNodeViewNoText(EntityInterface $node, string $view_mode, string $text, string $message) : void {
        $this->assertNodeViewTextHelper($node, $view_mode, $text, $message, TRUE);
    }
    
    /**
     * Asserts that a string is (not) found in the rendered node in a view mode.
     *
     * This helper function is used by assertNodeViewText() and
     * assertNodeViewNoText().
     *
     * @param \Drupal\Core\Entity\EntityInterface $node
     *   The node.
     * @param string $view_mode
     *   The view mode in which the node should be displayed.
     * @param string $text
     *   Plain text to look for.
     * @param string $message
     *   Message to display.
     * @param bool $not_exists
     *   TRUE if this text should not exist, FALSE if it should.
     *
     * @internal
     */
    public function assertNodeViewTextHelper(EntityInterface $node, string $view_mode, string $text, string $message, bool $not_exists) : void {
        // Make sure caches on the tester side are refreshed after changes
        // submitted on the tested side.
        \Drupal::service('entity_field.manager')->clearCachedFieldDefinitions();
        // Render a cloned node, so that we do not alter the original.
        $clone = clone $node;
        $element = \Drupal::entityTypeManager()->getViewBuilder('node')
            ->view($clone, $view_mode);
        $output = (string) \Drupal::service('renderer')->renderRoot($element);
        if ($not_exists) {
            $this->assertStringNotContainsString((string) $text, $output, $message);
        }
        else {
            $this->assertStringContainsString((string) $text, $output, $message);
        }
    }
    
    /**
     * Checks if a select element contains the specified options.
     *
     * @param string $name
     *   The field name.
     * @param array $expected_options
     *   An array of expected options.
     *
     * @internal
     */
    protected function assertFieldSelectOptions(string $name, array $expected_options) : void {
        $xpath = $this->assertSession()
            ->buildXPathQuery('//select[@name=:name]', [
            ':name' => $name,
        ]);
        $fields = $this->xpath($xpath);
        if ($fields) {
            $field = $fields[0];
            $options = $this->getAllOptionsList($field);
            sort($options);
            sort($expected_options);
            $this->assertSame($expected_options, $options);
        }
        else {
            $this->fail('Unable to find field ' . $name);
        }
    }
    
    /**
     * Extracts all options from a select element.
     *
     * @param Behat\Mink\Element\NodeElement $element
     *   The select element field information.
     *
     * @return array
     *   An array of option values as strings.
     */
    protected function getAllOptionsList(NodeElement $element) {
        $options = [];
        // Add all options items.
        foreach ($element->option as $option) {
            $options[] = $option->getValue();
        }
        // Loops trough all the option groups
        foreach ($element->optgroup as $optgroup) {
            $options = array_merge($this->getAllOptionsList($optgroup), $options);
        }
        return $options;
    }

}