class StyleGridResponsiveTest

class StyleGridResponsiveTest extends PluginKernelTestBase {
    
    /**
     * Views used by this test.
     *
     * @var array
     */
    public static $testViews = [
        'test_grid_responsive',
    ];
    
    /**
     * Generates a grid_responsive and asserts that it is displaying correctly.
     *
     * @param array $options
     *   Options for the style plugin.
     * @param array $expected
     *   Expected values sued for assertions.
     *
     * @dataProvider providerTestResponsiveGrid
     */
    public function testResponsiveGrid(array $options, array $expected) : void {
        // Create and preview a View with the provided options.
        $view = Views::getView('test_grid_responsive');
        $view->setDisplay('default');
        $view->initStyle();
        $view->initHandlers();
        $view->initQuery();
        $view->style_plugin->options = $options + $view->style_plugin->options;
        $this->executeView($view);
        $output = $view->preview();
        $output = \Drupal::service('renderer')->renderRoot($output);
        $this->setRawContent($output);
        // Confirm that the alignment class is added.
        $result = $this->xpath('//div[contains(@class, "views-view-responsive-grid") and contains(@class, :alignment)]', [
            ':alignment' => 'views-view-responsive-grid--' . $expected['alignment'],
        ]);
        $this->assertGreaterThan(0, count($result), "Alignment CSS variable value is detected and correct.");
        // Check for CSS variables in style attribute.
        $result = $this->xpath('//div[contains(@class, "views-view-responsive-grid") and contains(@style, :columns)]', [
            ':columns' => '--views-responsive-grid--column-count:' . $expected['columns'],
        ]);
        $this->assertGreaterThan(0, count($result), "Max-columns CSS variable value is detected and correct.");
        $result = $this->xpath('//div[contains(@class, "views-view-responsive-grid") and contains(@style, :min-width)]', [
            ':min-width' => '--views-responsive-grid--cell-min-width:' . $expected['cell_min_width'] . 'px',
        ]);
        $this->assertGreaterThan(0, count($result), "Min-width CSS variable value is detected and correct.");
        $result = $this->xpath('//div[contains(@class, "views-view-responsive-grid") and contains(@style, :gutter)]', [
            ':gutter' => '--views-responsive-grid--layout-gap:' . $expected['grid_gutter'] . 'px',
        ]);
        $this->assertGreaterThan(0, count($result), "Gutter CSS variable value is detected and correct.");
        // Assert that the correct number of elements have been rendered and that
        // markup structure is correct.
        $result = $this->xpath('//div[contains(@class, "views-view-responsive-grid")]/div[contains(@class, "views-view-responsive-grid__item")]/div[contains(@class, "views-view-responsive-grid__item-inner")]');
        // There are five results for this test view. See ViewTestData::dataSet().
        $this->assertCount(5, $result, "The expected number of items are rendered in the correct structure.");
    }
    
    /**
     * Data provider for testing various configurations.
     *
     * @return array
     *   Array containing options for the style plugin and expected values.
     */
    public static function providerTestResponsiveGrid() {
        return [
            'horizontal' => [
                'options' => [
                    'columns' => 7,
                    'cell_min_width' => 123,
                    'grid_gutter' => 13,
                    'alignment' => 'horizontal',
                ],
                'expected' => [
                    'columns' => 7,
                    'cell_min_width' => 123,
                    'grid_gutter' => 13,
                    'alignment' => 'horizontal',
                ],
            ],
            'vertical' => [
                'options' => [
                    'columns' => 8,
                    'cell_min_width' => 50,
                    'grid_gutter' => 44,
                    'alignment' => 'vertical',
                ],
                'expected' => [
                    'columns' => 8,
                    'cell_min_width' => 50,
                    'grid_gutter' => 44,
                    'alignment' => 'vertical',
                ],
            ],
            'default options' => [
                'options' => [],
                'expected' => [
                    'columns' => 4,
                    'cell_min_width' => 100,
                    'grid_gutter' => 10,
                    'alignment' => 'horizontal',
                ],
            ],
        ];
    }

}