1 files changed, 52 insertions, 0 deletions
diff --git a/chromium/ui/wm/core/window_util_unittest.cc b/chromium/ui/wm/core/window_util_unittest.cc
new file mode 100644
index 00000000000..35be2259179
--- /dev/null
+++ b/chromium/ui/wm/core/window_util_unittest.cc
@@ -0,0 +1,52 @@
+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "ui/wm/core/window_util.h"
+
+#include "base/memory/scoped_ptr.h"
+#include "ui/aura/test/aura_test_base.h"
+#include "ui/aura/test/test_windows.h"
+#include "ui/aura/window.h"
+#include "ui/compositor/layer.h"
+#include "ui/compositor/layer_tree_owner.h"
+
+namespace wm {
+
+typedef aura::test::AuraTestBase WindowUtilTest;
+
+// Test if the recreate layers does not recreate layers that have
+// already been acquired.
+TEST_F(WindowUtilTest, RecreateLayers) {
+  scoped_ptr<aura::Window> window1(
+      aura::test::CreateTestWindowWithId(0, NULL));
+  scoped_ptr<aura::Window> window11(
+      aura::test::CreateTestWindowWithId(1, window1.get()));
+  scoped_ptr<aura::Window> window12(
+      aura::test::CreateTestWindowWithId(2, window1.get()));
+
+  ASSERT_EQ(2u, window1->layer()->children().size());
+
+  scoped_ptr<ui::Layer> acquired(window11->AcquireLayer());
+  EXPECT_TRUE(acquired.get());
+  EXPECT_EQ(acquired.get(), window11->layer());
+
+  scoped_ptr<ui::LayerTreeOwner> tree =
+      wm::RecreateLayers(window1.get());
+
+  // The detached layer should not have the layer that has
+  // already been detached.
+  ASSERT_EQ(1u, tree->root()->children().size());
+  // Child layer is new instance.
+  EXPECT_NE(window11->layer(), tree->root()->children()[0]);
+  EXPECT_NE(window12->layer(), tree->root()->children()[0]);
+
+  // The original window should have both.
+  ASSERT_EQ(2u, window1->layer()->children().size());
+  EXPECT_EQ(window11->layer(), window1->layer()->children()[0]);
+  EXPECT_EQ(window12->layer(), window1->layer()->children()[1]);
+
+  // Delete the window before the acquired layer is deleted.
+  window11.reset();
+}
+}  // namespace wm