Added listDirectory function

src/Gittern/Gaufrette/GitternCommitishReadOnlyAdapter.php

@@ -6,6 +6,8 @@
 use Gittern\Entity\GitObject\Blob;
 use Gittern\Entity\GitObject\Commit;
 use Gittern\Entity\GitObject\Tree;
+use Gittern\Entity\GitObject\Node\BlobNode;
+use Gittern\Entity\GitObject\Node\TreeNode;
 
 use Gaufrette\Adapter\Base as BaseAdapter;
 
@@ -124,4 +126,23 @@ public function supportsMetadata()
   {
     return false;
   }
-}
+
+  public function listDirectory($directory = '')
+  {
+      $directory_tree = $this->getGitObjectForKey($directory);
+      $files = $dirs = array();
+      foreach ($directory_tree->getNodes() as $node) {
+        if ($node instanceof BlobNode) {
+            $files[] = $node->getName();
+        }
+        if ($node instanceof TreeNode) {
+            $dirs[] = $node->getName();
+        }
+      }
+
+      return array(
+         'keys' => $files,
+         'dirs' => $dirs
+      );
+  }
+}

tests/Gittern/Gaufrette/GitternCommitishReadOnlyAdapterTest.php

@@ -149,4 +149,41 @@ public function testDoesntSupportMetadata()
   {
     $this->assertFalse($this->adapter->supportsMetadata());
   }
-}
+
+  public function testCanListEmptyDirectory()
+  {
+    $test_dir = '';
+    $dirname = 'child_dir';
+    $filename = 'test_file.xml';
+    $foo_tree_mock = M::mock('Gittern\Entity\GitObject\Node\TreeNode');
+    $foo_tree_mock->shouldReceive('getName')->atLeast()->once()->andReturn($dirname);
+    $foo_blob_mock = M::mock('Gittern\Entity\GitObject\Node\BlobNode');
+    $foo_blob_mock->shouldReceive('getName')->atLeast()->once()->andReturn($filename);
+    $this->tree_mock->shouldReceive('getNodeNamed')->with('')->andReturn($this->tree_mock);
+    $this->tree_mock->shouldReceive('getRelatedObject')->andReturn($this->tree_mock);
+    $this->tree_mock->shouldReceive('getNodes')->atLeast()->once()->andReturn(array($foo_tree_mock, $foo_blob_mock));
+
+    $list = $this->adapter->listDirectory($test_dir);
+    $this->assertEquals(array($filename), $list['keys']);
+    $this->assertEquals(array($dirname), $list['dirs']);
+  }
+
+  public function testCanListGivenDirectory()
+  {
+      $test_dir = 'translations';
+      $filename = 'test_file.xml';
+
+      $tree_node_mock = M::mock('Gittern\Entity\GitObject\Node\TreeNode');
+      $tree_mock = M::mock('Gittern\Entity\GitObject\Tree');
+      $blob_mock = M::mock('Gittern\Entity\GitObject\Node\BlobNode');
+      $blob_mock->shouldReceive('getName')->atLeast()->once()->andReturn($filename);
+      $this->tree_mock->shouldReceive('getNodeNamed')->with($test_dir)->andReturn($tree_node_mock);
+      $tree_node_mock->shouldReceive('getRelatedObject')->andReturn($tree_mock);
+      $tree_mock->shouldReceive('getNodes')->atLeast()->once()->andReturn(array($blob_mock));
+
+      $list = $this->adapter->listDirectory($test_dir);
+      $this->assertEquals(array($filename), $list['key']);
+      $this->assertEmpty($list['dirs']);
+  }
+
+}