Explicit container priority

athena/screen/screen_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/screen/public/screen_manager.h"
+
+#include <string>
+
+#include "athena/test/athena_test_base.h"
+#include "ui/aura/window.h"
+
+typedef athena::test::AthenaTestBase ScreenManagerTest;
+
+namespace athena {
+namespace {
+
+aura::Window* Create(const std::string& name, int z_order_priority) {
+  ScreenManager::ContainerParams params(name, z_order_priority);
+  return ScreenManager::Get()->CreateContainer(params);
+}
+
+void CheckZOrder(aura::Window* w1, aura::Window* w2) {
+  aura::Window* parent = w1->parent();
+  const aura::Window::Windows& children = parent->children();
+  aura::Window::Windows::const_iterator begin_iter = children.begin();
+  aura::Window::Windows::const_iterator end_iter = children.end();
+
+  aura::Window::Windows::const_iterator w1_iter =
+      std::find(begin_iter, end_iter, w1);
+  aura::Window::Windows::const_iterator w2_iter =
+      std::find(begin_iter, end_iter, w2);
+  EXPECT_NE(end_iter, w1_iter);
+  EXPECT_NE(end_iter, w2_iter);
+  EXPECT_TRUE(w1_iter < w2_iter);
+}
+
+}  // namespace
+
+TEST_F(ScreenManagerTest, Zorder) {
+  aura::Window* window_10 = Create("test10", 10);
+  aura::Window* window_11 = Create("test11", 11);
+  aura::Window* window_12 = Create("test12", 12);
+
+  {
+    SCOPED_TRACE("Init");
+    CheckZOrder(window_10, window_11);
+    CheckZOrder(window_11, window_12);
+  }
+  {
+    SCOPED_TRACE("Delete");
+    delete window_11;
+    CheckZOrder(window_10, window_12);
+  }
+  {
+    SCOPED_TRACE("Insert");
+    window_11 = Create("test11", 11);
+    CheckZOrder(window_10, window_11);
+    CheckZOrder(window_11, window_12);
+  }
+}
+
+}  // namespace athena