class TwigExtensionTest

class TwigExtensionTest extends BrowserTestBase {
    
    /**
     * {@inheritdoc}
     */
    protected static $modules = [
        'theme_test',
        'twig_extension_test',
        'twig_theme_test',
    ];
    
    /**
     * {@inheritdoc}
     */
    protected $defaultTheme = 'stark';
    
    /**
     * {@inheritdoc}
     */
    protected function setUp() : void {
        parent::setUp();
        \Drupal::service('theme_installer')->install([
            'test_theme',
        ]);
    }
    
    /**
     * Tests that the provided Twig extension loads the service appropriately.
     */
    public function testTwigExtensionLoaded() : void {
        $twigService = \Drupal::service('twig');
        $ext = $twigService->getExtension(TestExtension::class);
        $this->assertInstanceOf(TestExtension::class, $ext);
    }
    
    /**
     * Tests that the Twig extension's filter produces expected output.
     */
    public function testTwigExtensionFilter() : void {
        $this->config('system.theme')
            ->set('default', 'test_theme')
            ->save();
        $this->drupalGet('twig-extension-test/filter');
        $this->assertSession()
            ->pageTextContains('Every plant is not a mineral.');
        // Test safe_join filter.
        $this->assertSession()
            ->responseContains('&lt;em&gt;will be escaped&lt;/em&gt;<br/><em>will be markup</em><br/><strong>will be rendered</strong>');
    }
    
    /**
     * Tests that the Twig extension's function produces expected output.
     */
    public function testTwigExtensionFunction() : void {
        $this->config('system.theme')
            ->set('default', 'test_theme')
            ->save();
        $this->drupalGet('twig-extension-test/function');
        $this->assertSession()
            ->pageTextContains('THE QUICK BROWN BOX JUMPS OVER THE LAZY DOG 123.');
        $this->assertSession()
            ->pageTextContains('the quick brown box jumps over the lazy dog 123.');
        $this->assertSession()
            ->pageTextNotContains('The Quick Brown Fox Jumps Over The Lazy Dog 123.');
    }
    
    /**
     * Tests output of integer and double 0 values of TwigExtension::escapeFilter().
     *
     * @see https://www.drupal.org/node/2417733
     */
    public function testsRenderEscapedZeroValue() : void {
        
        /** @var \Drupal\Core\Template\TwigExtension $extension */
        $extension = \Drupal::service('twig.extension');
        
        /** @var \Drupal\Core\Template\TwigEnvironment $twig */
        $twig = \Drupal::service('twig');
        $this->assertSame(0, $extension->escapeFilter($twig, 0), 'TwigExtension::escapeFilter() returns zero correctly when provided as an integer.');
        $this->assertSame(0, $extension->escapeFilter($twig, 0.0), 'TwigExtension::escapeFilter() returns zero correctly when provided as a double.');
    }
    
    /**
     * Tests output of integer and double 0 values of TwigExtension->renderVar().
     *
     * @see https://www.drupal.org/node/2417733
     */
    public function testsRenderZeroValue() : void {
        
        /** @var \Drupal\Core\Template\TwigExtension $extension */
        $extension = \Drupal::service('twig.extension');
        $this->assertSame(0, $extension->renderVar(0), 'TwigExtension::renderVar() renders zero correctly when provided as an integer.');
        $this->assertSame(0, $extension->renderVar(0.0), 'TwigExtension::renderVar() renders zero correctly when provided as a double.');
    }
    
    /**
     * Tests the dump function.
     */
    public function testDump() : void {
        // Test Twig Debug disabled.
        $this->drupalGet('/twig-theme-test/dump');
        $this->assertSession()
            ->elementsCount('css', '.sf-dump', 0);
        // Test Twig Debug enabled.
        $parameters = $this->container
            ->getParameter('twig.config');
        $parameters['debug'] = TRUE;
        $this->setContainerParameter('twig.config', $parameters);
        $this->resetAll();
        $this->drupalGet('/twig-theme-test/dump');
        $dumps = $this->getSession()
            ->getPage()
            ->findAll('css', '.sf-dump');
        $this->assertEquals(4, count($dumps));
        // Test dumping single variable.
        $this->assertStringContainsString('💩', $dumps[0]->getText());
        $this->assertStringNotContainsString('🐣', $dumps[0]->getText());
        // Test dumping context.
        $this->assertStringContainsString('"bar" => "🐣"', $dumps[1]->getText());
        // Test dump as a variadic.
        $this->assertStringContainsString('💩', $dumps[2]->getText());
        $this->assertStringContainsString('☄️', $dumps[3]->getText());
    }
    
    /**
     * Test if Drupal html strategy is done and the fallback to Twig itself works.
     */
    public function testRenderStrategies() : void {
        
        /** @var \Drupal\Core\Template\TwigExtension $extension */
        $extension = \Drupal::service('twig.extension');
        
        /** @var \Drupal\Core\Template\TwigEnvironment $twig */
        $twig = \Drupal::service('twig');
        $this->assertSame('test&amp;', $extension->escapeFilter($twig, 'test&'), 'TwigExtension::escapeFilter() renders escaped & when strategy is html (default).');
        $this->assertSame('test\\u0026', $extension->escapeFilter($twig, 'test&', 'js'), 'TwigExtension::escapeFilter() renders escaped & when strategy is js.');
    }

}