athena: Add a test for FillLayoutManager.

athena/common/fill_layout_manager_unittest.cc

+// 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 "athena/common/fill_layout_manager.h"
+
+#include "testing/gtest/include/gtest/gtest.h"
+#include "ui/aura/window.h"
+
+namespace athena {
+
+TEST(FillLayoutManagerTest, ChildWindowSizedCorrectly) {
+  scoped_ptr<aura::Window> parent(new aura::Window(NULL));
+  parent->SetBounds(gfx::Rect(10, 20, 30, 40));
+  parent->SetLayoutManager(new FillLayoutManager(parent.get()));
+
+  scoped_ptr<aura::Window> child(new aura::Window(NULL));
+  child->SetBounds(gfx::Rect(0, 0, 5, 10));
+
+  EXPECT_NE(child->bounds().size().ToString(),
+            parent->bounds().size().ToString());
+
+  parent->AddChild(child.get());
+  EXPECT_EQ(child->bounds().size().ToString(),
+            parent->bounds().size().ToString());
+
+  parent->SetBounds(gfx::Rect(0, 0, 100, 200));
+  EXPECT_EQ(child->bounds().size().ToString(),
+            parent->bounds().size().ToString());
+}
+
+}  // namespace athena