class StyleMappingTest

class StyleMappingTest extends StyleTestBase {
    
    /**
     * {@inheritdoc}
     */
    protected static $modules = [
        'system',
    ];
    
    /**
     * Views used by this test.
     *
     * @var array
     */
    public static $testViews = [
        'test_style_mapping',
    ];
    
    /**
     * Verifies that the fields were mapped correctly.
     */
    public function testMappedOutput() : void {
        $view = Views::getView('test_style_mapping');
        $output = (string) $this->mappedOutputHelper($view);
        $this->assertStringNotContainsString('job', $output, 'The job field is added to the view but not in the mapping.');
        $view->destroy();
        $view->setDisplay();
        $view->displayHandlers
            ->get('default')->options['style']['options']['mapping']['name_field'] = 'job';
        $output = $this->mappedOutputHelper($view);
        $this->assertStringContainsString('job', $output, 'The job field is added to the view and is in the mapping.');
    }
    
    /**
     * Tests the mapping of fields.
     *
     * @param \Drupal\views\ViewExecutable $view
     *   The view to test.
     *
     * @return string
     *   The view rendered as HTML.
     */
    protected function mappedOutputHelper(ViewExecutable $view) : string {
        $output = $view->preview();
        $rendered_output = (string) \Drupal::service('renderer')->renderRoot($output);
        $this->storeViewPreview($rendered_output);
        $rows = $this->elements->body->div->div;
        $data_set = $this->dataSet();
        $count = 0;
        foreach ($rows as $row) {
            $attributes = $row->attributes();
            $class = (string) $attributes['class'][0];
            $this->assertStringContainsString('views-row-mapping-test', $class, 'Make sure that each row has the correct CSS class.');
            foreach ($row->div as $field) {
                // Split up the field-level class, the first part is the mapping name
                // and the second is the field ID.
                $field_attributes = $field->attributes();
                $name = strtok((string) $field_attributes['class'][0], '-');
                $field_id = strtok('-');
                // The expected result is the mapping name and the field value,
                // separated by ':'.
                $expected_result = $name . ':' . $data_set[$count][$field_id];
                $actual_result = (string) $field;
                $this->assertSame($expected_result, $actual_result, "The fields were mapped successfully: {$name} => {$field_id}");
            }
            $count++;
        }
        return $rendered_output;
    }

}