class StyleUITest

class StyleUITest extends UITestBase {
    
    /**
     * Views used by this test.
     *
     * @var array
     */
    public static $testViews = [
        'test_view',
    ];
    
    /**
     * {@inheritdoc}
     */
    protected $defaultTheme = 'stark';
    
    /**
     * Tests changing the style plugin and changing some options of a style.
     */
    public function testStyleUI() : void {
        $view_name = 'test_view';
        $view_edit_url = "admin/structure/views/view/{$view_name}/edit";
        $style_plugin_url = "admin/structure/views/nojs/display/{$view_name}/default/style";
        $style_options_url = "admin/structure/views/nojs/display/{$view_name}/default/style_options";
        $this->drupalGet($style_plugin_url);
        $this->assertSession()
            ->fieldValueEquals('style[type]', 'default');
        $edit = [
            'style[type]' => 'test_style',
        ];
        $this->submitForm($edit, 'Apply');
        $this->assertSession()
            ->fieldExists('style_options[test_option]');
        $random_name = $this->randomMachineName();
        $edit = [
            'style_options[test_option]' => $random_name,
        ];
        $this->submitForm($edit, 'Apply');
        $this->drupalGet($style_options_url);
        $this->assertSession()
            ->fieldValueEquals('style_options[test_option]', $random_name);
        $this->drupalGet($view_edit_url);
        $this->submitForm([], 'Save');
        $this->assertSession()
            ->linkExists('Test style plugin', 0, 'Make sure the test style plugin is shown in the UI');
        $view = Views::getView($view_name);
        $view->initDisplay();
        $style = $view->display_handler
            ->getOption('style');
        $this->assertEquals('test_style', $style['type'], 'Make sure that the test_style got saved as used style plugin.');
        $this->assertEquals($random_name, $style['options']['test_option'], 'Make sure that the custom settings field got saved as expected.');
        // Test that fields are working correctly in the UI for style plugins when
        // a field row plugin is selected.
        $this->drupalGet("admin/structure/views/view/{$view_name}/edit");
        $this->submitForm([], 'Add Page');
        $this->drupalGet("admin/structure/views/nojs/display/{$view_name}/page_1/row");
        $this->submitForm([
            'row[type]' => 'fields',
        ], 'Apply');
        // If fields are being used this text will not be shown.
        $this->assertSession()
            ->pageTextNotContains('The selected style or row format does not use fields.');
    }

}