Twig_Environment::compileSource PHP Method

    public function compileSource($source, $name = null)
    {
        try {
            return $this->compile($this->parse($this->tokenize($source, $name)));
        } catch (Twig_Error $e) {
            $e->setTemplateFile($name);
            throw $e;
        } catch (Exception $e) {
            throw new Twig_Error_Runtime(sprintf('An exception has been thrown during the compilation of a template ("%s").', $e->getMessage()), -1, $name, $e);
        }
    }

 /**
  * @dataProvider getGenerationTests
  */
 public function testGenerate($inputFile, $outputFile)
 {
     $env = new \Twig_Environment();
     $env->addExtension(new \Twig_Extension_Core());
     $env->addExtension(new TwigJsExtension());
     $env->setLoader(new \Twig_Loader_Filesystem(__DIR__ . '/Fixture/templates'));
     $env->setCompiler(new JsCompiler($env));
     $source = file_get_contents($inputFile);
     $this->assertEquals(file_get_contents($outputFile), $env->compileSource($source, $inputFile));
 }