class ExamplesTest

class ExamplesTest extends ExamplesBrowserTestBase {
    
    /**
     * {@inheritdoc}
     */
    protected $defaultTheme = 'stark';
    
    /**
     * Modules to install.
     *
     * @var array
     */
    public static $modules = [
        'examples',
        'toolbar',
    ];
    
    /**
     * Verify that the toolbar tab and tray are showing and functioning.
     */
    public function testExampleToolbar() {
        $assert = $this->assertSession();
        // Log in a user who can see the toolbar and all the routes in it.
        $this->drupalLogin($this->drupalCreateUser([
            'access content',
            'access toolbar',
        ]));
        // All this should be on the front page.
        $this->drupalGet('');
        $assert->statusCodeEquals(200);
        // Assert that the toolbar tab registered by examples is present.
        $assert->linkExists('Examples');
        // Assert that the toolbar tab registered by examples is present.
        $this->assertNotEmpty($this->xpath('//nav/div/a[@data-toolbar-tray="toolbar-item-examples-tray"]'));
        // Assert that the toolbar tray registered by examples is present.
        $this->assertNotEmpty($this->xpath('//nav/div/div[@data-toolbar-tray="toolbar-item-examples-tray"]'));
        
        /* @var $module_installer \Drupal\Core\Extension\ModuleInstallerInterface */
        $module_installer = $this->container
            ->get('module_installer');
        // Loop through all the routes. Check that they are not present in the
        // toolbar, enable the module, and then check that they are present in the
        // toolbar.
        foreach (_examples_toolbar_routes() as $module => $route) {
            // Convert the module name to the HTML class.
            $class = Html::getClass($module);
            $xpath = "//li/a[@class=\"{$class}\"]";
            // Assert that the toolbar link item isn't present.
            $this->assertEmpty($this->xpath($xpath), 'Found li with this class: ' . $class);
            // Install the module.
            $module_installer->install([
                $module,
            ], TRUE);
            $this->resetAll();
            // Load the route.
            $this->drupalGet(Url::fromRoute($route));
            // Assert that the toolbar link is present.
            $this->assertNotEmpty($this->xpath($xpath), 'Unable to find toolbar link for module: ' . $module);
            // Handle some special cases where modules depend on each other so they
            // might have already put the toolbar link in the toolbar.
            if ($module == 'file_example') {
                $module_installer->uninstall([
                    'file_example',
                    'stream_wrapper_example',
                ]);
            }
        }
    }

}