[Filesystem] Added unit tests for rename method.

Author: jakzal

src/Symfony/Component/Filesystem/Tests/FilesystemTest.php

@@ -342,6 +342,32 @@ public function testChmodChangesModeOfTraversableFileObject()
  $this->assertEquals(753, $this->getFilePermisions($directory));
  }
 
+ public function testRename()
+ {
+ $file = $this->workspace.DIRECTORY_SEPARATOR.'file';
+ $newPath = $this->workspace.DIRECTORY_SEPARATOR.'new_file';
+ touch($file);
+
+ $this->filesystem->rename($file, $newPath);
+
+ $this->assertFileNotExists($file);
+ $this->assertFileExists($newPath);
+ }
+
+ /**
+ * @expectedException \RuntimeException
+ */
+ public function testRenameThrowsExceptionIfTargetAlreadyExists()
+ {
+ $file = $this->workspace.DIRECTORY_SEPARATOR.'file';
+ $newPath = $this->workspace.DIRECTORY_SEPARATOR.'new_file';
+
+ touch($file);
+ touch($newPath);
+
+ $this->filesystem->rename($file, $newPath);
+ }
+
  /**
  * Returns file permissions as three digits (i.e. 755)
  *