[HttpKernel] fix deprecating KernelInterface::getRootDir()

Author: nicolas-grekas

CHANGELOG.md

@@ -4,7 +4,7 @@ CHANGELOG
 4.2.0
 -----
 
- * deprecated `Kernel::getRootDir()` and the `kernel.root_dir` parameter
+ * deprecated `KernelInterface::getRootDir()` and the `kernel.root_dir` parameter
  * deprecated `KernelInterface::getName()` and the `kernel.name` parameter
 
 4.1.0

KernelInterface.php

@@ -123,6 +123,8 @@ public function isDebug();
      * Gets the application root dir (path of the project's Kernel class).
      *
      * @return string The Kernel root dir
+     *
+     * @deprecated since Symfony 4.2
      */
     public function getRootDir();
 

Tests/Fixtures/KernelWithoutBundles.php

@@ -26,6 +26,11 @@ public function registerContainerConfiguration(LoaderInterface $loader)
     {
     }
 
+    public function getProjectDir()
+    {
+        return __DIR__;
+    }
+
     protected function build(ContainerBuilder $container)
     {
         $container->setParameter('test_executed', true);

Tests/KernelTest.php

@@ -521,7 +521,7 @@ public function testProjectDirExtension()
         $kernel->boot();
 
         $this->assertSame(__DIR__.'/Fixtures', $kernel->getProjectDir());
-        $this->assertSame(__DIR__.'/Fixtures', $kernel->getContainer()->getParameter('kernel.project_dir'));
+        $this->assertSame(__DIR__.\DIRECTORY_SEPARATOR.'Fixtures', $kernel->getContainer()->getParameter('kernel.project_dir'));
     }
 
     public function testKernelReset()