class SourceEditingEmptyElementTest

class SourceEditingEmptyElementTest extends SourceEditingTestBase {
    
    /**
     * Tests creating empty inline elements using Source Editing.
     *
     * @testWith ["<p>Before <i class=\"fab fa-drupal\"></i> and after.</p>", "<p>Before and after.</p>", "<p>Before and after.</p>", null]
     *           ["<p>Before <i class=\"fab fa-drupal\"></i> and after.</p>", "<p>Before &nbsp;and after.</p>", null, "<i>"]
     *           ["<p>Before <i class=\"fab fa-drupal\"></i> and after.</p>", null, null, "<i class>"]
     *           ["<p>Before <span class=\"icon my-icon\"></span> and after.</p>", "<p>Before and after.</p>", "<p>Before and after.</p>", null]
     *           ["<p>Before <span class=\"icon my-icon\"></span> and after.</p>", "<p>Before &nbsp;and after.</p>", null, "<span>"]
     *           ["<p>Before <span class=\"icon my-icon\"></span> and after.</p>", "<p>Before <span class=\"icon\"></span> and after.</p>", null, "<span class=\"icon\">"]
     */
    public function testEmptyInlineElement(string $input, ?string $expected_output_when_restricted, ?string $expected_output_when_unrestricted, ?string $allowed_elements_string) : void {
        $this->host->body->value = $input;
        $this->host
            ->save();
        // If no expected output is specified, it should be identical to the input.
        if ($expected_output_when_restricted === NULL) {
            $expected_output_when_restricted = $input;
        }
        if ($expected_output_when_unrestricted === NULL) {
            $expected_output_when_unrestricted = $input;
        }
        $text_editor = Editor::load('test_format');
        $text_format = FilterFormat::load('test_format');
        if ($allowed_elements_string) {
            // Allow creating additional HTML using SourceEditing.
            $settings = $text_editor->getSettings();
            $settings['plugins']['ckeditor5_sourceEditing']['allowed_tags'][] = $allowed_elements_string;
            $text_editor->setSettings($settings);
            // Keep the allowed HTML tags in sync.
            $allowed_elements = HTMLRestrictions::fromTextFormat($text_format);
            $updated_allowed_tags = $allowed_elements->merge(HTMLRestrictions::fromString($allowed_elements_string));
            $filter_html_config = $text_format->filters('filter_html')
                ->getConfiguration();
            $filter_html_config['settings']['allowed_html'] = $updated_allowed_tags->toFilterHtmlAllowedTagsString();
            $text_format->setFilterConfig('filter_html', $filter_html_config);
            // Verify the text format and editor are still a valid pair.
            $this->assertSame([], array_map(function (ConstraintViolationInterface $v) {
                return (string) $v->getMessage();
            }, iterator_to_array(CKEditor5::validatePair($text_editor, $text_format))));
            // If valid, save both.
            $text_format->save();
            $text_editor->save();
        }
        $this->drupalGet($this->host
            ->toUrl('edit-form'));
        $this->waitForEditor();
        $this->assertSame($expected_output_when_restricted, $this->getEditorDataAsHtmlString());
        // Make the text format unrestricted: disable filter_html.
        $text_format->setFilterConfig('filter_html', [
            'status' => FALSE,
        ])
            ->save();
        // Verify the text format and editor are still a valid pair.
        $this->assertSame([], array_map(function (ConstraintViolationInterface $v) {
            return (string) $v->getMessage();
        }, iterator_to_array(CKEditor5::validatePair($text_editor, $text_format))));
        // Test with a text format allowing arbitrary HTML.
        $this->drupalGet($this->host
            ->toUrl('edit-form'));
        $this->waitForEditor();
        $this->assertSame($expected_output_when_unrestricted, $this->getEditorDataAsHtmlString());
    }

}