class PreviewTest

class PreviewTest extends UITestBase {
    
    /**
     * Views used by this test.
     *
     * @var array
     */
    public static $testViews = [
        'test_preview',
        'test_preview_error',
        'test_pager_full',
        'test_mini_pager',
        'test_click_sort',
    ];
    
    /**
     * {@inheritdoc}
     */
    protected $defaultTheme = 'stark';
    
    /**
     * Tests contextual links in the preview form.
     */
    public function testPreviewContextual() : void {
        \Drupal::service('module_installer')->install([
            'contextual',
        ]);
        $this->resetAll();
        $this->drupalGet('admin/structure/views/view/test_preview/edit');
        $this->assertSession()
            ->statusCodeEquals(200);
        $this->submitForm($edit = [], 'Update preview');
        // Verify that the contextual link to add a new field is shown.
        $selector = $this->assertSession()
            ->buildXPathQuery('//div[@id="views-live-preview"]//ul[contains(@class, :ul-class)]/li/a[contains(@href, :href)]', [
            ':ul-class' => 'contextual-links',
            ':href' => '/admin/structure/views/nojs/add-handler/test_preview/default/filter',
        ]);
        $this->assertSession()
            ->elementsCount('xpath', $selector, 1);
        $this->submitForm([
            'view_args' => '100',
        ], 'Update preview');
        // Test that area text and exposed filters are present and rendered.
        $this->assertSession()
            ->fieldExists('id');
        $this->assertSession()
            ->pageTextContains('Test header text');
        $this->assertSession()
            ->pageTextContains('Test footer text');
        $this->assertSession()
            ->pageTextContains('Test empty text');
        $this->submitForm([
            'view_args' => '0',
        ], 'Update preview');
        // Test that area text and exposed filters are present and rendered.
        $this->assertSession()
            ->fieldExists('id');
        $this->assertSession()
            ->pageTextContains('Test header text');
        $this->assertSession()
            ->pageTextContains('Test footer text');
        $this->assertSession()
            ->pageTextContains('Test empty text');
    }
    
    /**
     * Tests arguments in the preview form.
     */
    public function testPreviewUI() : void {
        $this->drupalGet('admin/structure/views/view/test_preview/edit');
        $this->assertSession()
            ->statusCodeEquals(200);
        $this->submitForm($edit = [], 'Update preview');
        $selector = '//div[@class = "views-row"]';
        $this->assertSession()
            ->elementsCount('xpath', $selector, 5);
        // Filter just the first result.
        $this->submitForm($edit = [
            'view_args' => '1',
        ], 'Update preview');
        $this->assertSession()
            ->elementsCount('xpath', $selector, 1);
        // Filter for no results.
        $this->submitForm($edit = [
            'view_args' => '100',
        ], 'Update preview');
        $this->assertSession()
            ->elementNotExists('xpath', $selector);
        // Test that area text and exposed filters are present and rendered.
        $this->assertSession()
            ->fieldExists('id');
        $this->assertSession()
            ->pageTextContains('Test header text');
        $this->assertSession()
            ->pageTextContains('Test footer text');
        $this->assertSession()
            ->pageTextContains('Test empty text');
        // Test feed preview.
        $view = [];
        $view['label'] = $this->randomMachineName(16);
        $view['id'] = $this->randomMachineName(16);
        $view['page[create]'] = 1;
        $view['page[title]'] = $this->randomMachineName(16);
        $view['page[path]'] = $this->randomMachineName(16);
        $view['page[feed]'] = 1;
        $view['page[feed_properties][path]'] = $this->randomMachineName(16);
        $this->drupalGet('admin/structure/views/add');
        $this->submitForm($view, 'Save and edit');
        $this->clickLink('Feed');
        $this->submitForm([], 'Update preview');
        $this->assertSession()
            ->elementTextContains('xpath', '//div[@id="views-live-preview"]/pre', '<title>' . $view['page[title]'] . '</title>');
        // Test the non-default UI display options.
        // Statistics only, no query.
        $settings = \Drupal::configFactory()->getEditable('views.settings');
        $settings->set('ui.show.performance_statistics', TRUE)
            ->save();
        $this->drupalGet('admin/structure/views/view/test_preview/edit');
        $this->submitForm($edit = [
            'view_args' => '100',
        ], 'Update preview');
        $this->assertSession()
            ->pageTextContains('Query build time');
        $this->assertSession()
            ->pageTextContains('Query execute time');
        $this->assertSession()
            ->pageTextContains('View render time');
        $this->assertSession()
            ->responseNotContains('<strong>Query</strong>');
        // Statistics and query.
        $settings->set('ui.show.sql_query.enabled', TRUE)
            ->save();
        $this->submitForm($edit = [
            'view_args' => '100',
        ], 'Update preview');
        $this->assertSession()
            ->pageTextContains('Query build time');
        $this->assertSession()
            ->pageTextContains('Query execute time');
        $this->assertSession()
            ->pageTextContains('View render time');
        $this->assertSession()
            ->responseContains('<strong>Query</strong>');
        $query_string = <<<SQL
SELECT "views_test_data"."name" AS "views_test_data_name"
FROM
{views_test_data} "views_test_data"
WHERE (views_test_data.id = '100')
SQL;
        $this->assertSession()
            ->assertEscaped($query_string);
        // Test that the statistics and query are rendered above the preview.
        $this->assertLessThan(strpos($this->getSession()
            ->getPage()
            ->getContent(), 'js-view-dom-id'), strpos($this->getSession()
            ->getPage()
            ->getContent(), 'views-query-info'));
        // Test that statistics and query rendered below the preview.
        $settings->set('ui.show.sql_query.where', 'below')
            ->save();
        $this->submitForm($edit = [
            'view_args' => '100',
        ], 'Update preview');
        $this->assertLessThan(strpos($this->getSession()
            ->getPage()
            ->getContent(), 'views-query-info'), strpos($this->getSession()
            ->getPage()
            ->getContent(), 'js-view-dom-id'), 'Statistics shown below the preview.');
        // Test that the preview title isn't double escaped.
        $this->drupalGet("admin/structure/views/nojs/display/test_preview/default/title");
        $this->submitForm($edit = [
            'title' => 'Double & escaped',
        ], 'Apply');
        $this->submitForm([], 'Update preview');
        $this->assertSession()
            ->elementsCount('xpath', '//div[@id="views-live-preview"]/div[contains(@class, views-query-info)]//td[text()="Double & escaped"]', 1);
    }
    
    /**
     * Tests the additional information query info area.
     */
    public function testPreviewAdditionalInfo() : void {
        \Drupal::service('module_installer')->install([
            'views_ui_test',
        ]);
        $this->resetAll();
        $this->drupalGet('admin/structure/views/view/test_preview/edit');
        $this->assertSession()
            ->statusCodeEquals(200);
        $this->submitForm($edit = [], 'Update preview');
        // Check for implementation of hook_views_preview_info_alter().
        // @see views_ui_test.module
        // Verify that Views Query Preview Info area was altered.
        $this->assertSession()
            ->elementsCount('xpath', '//div[@id="views-live-preview"]/div[contains(@class, views-query-info)]//td[text()="Test row count"]', 1);
        // Check that additional assets are attached.
        $this->assertStringContainsString('views_ui_test/views_ui_test.test', $this->getDrupalSettings()['ajaxPageState']['libraries'], 'Attached library found.');
        $this->assertSession()
            ->responseContains('css/views_ui_test.test.css');
    }
    
    /**
     * Tests view validation error messages in the preview.
     */
    public function testPreviewError() : void {
        $this->drupalGet('admin/structure/views/view/test_preview_error/edit');
        $this->assertSession()
            ->statusCodeEquals(200);
        $this->submitForm($edit = [], 'Update preview');
        $this->assertSession()
            ->pageTextContains('Unable to preview due to validation errors.');
    }
    
    /**
     * Tests HTML is filtered from the view title when previewing.
     */
    public function testPreviewTitle() : void {
        // Update the view and change title with html tags.
        \Drupal::configFactory()->getEditable('views.view.test_preview')
            ->set('display.default.display_options.title', '<strong>Test preview title</strong>')
            ->save();
        $this->drupalGet('admin/structure/views/view/test_preview/edit');
        $this->assertSession()
            ->statusCodeEquals(200);
        $this->submitForm([], 'Update preview');
        $this->assertSession()
            ->pageTextContains('Test preview title');
        // Ensure allowed HTML tags are still displayed.
        $this->assertCount(2, $this->xpath('//div[@id="views-live-preview"]//strong[text()=:text]', [
            ':text' => 'Test preview title',
        ]));
        // Ensure other tags are filtered.
        \Drupal::configFactory()->getEditable('views.view.test_preview')
            ->set('display.default.display_options.title', '<b>Test preview title</b>')
            ->save();
        $this->submitForm([], 'Update preview');
        $this->assertCount(0, $this->xpath('//div[@id="views-live-preview"]//b[text()=:text]', [
            ':text' => 'Test preview title',
        ]));
    }

}