athena: Add a test for split-view controller.

athena/wm/split_view_controller_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/wm/split_view_controller.h"
+
+#include "athena/common/fill_layout_manager.h"
+#include "athena/test/athena_test_base.h"
+#include "athena/wm/public/window_list_provider.h"
+#include "base/memory/scoped_vector.h"
+#include "ui/aura/test/test_window_delegate.h"
+#include "ui/aura/window.h"
+
+namespace athena {
+
+typedef test::AthenaTestBase SplitViewControllerTest;
+
+class SimpleWindowListProvider : public WindowListProvider {
+ public:
+  explicit SimpleWindowListProvider(aura::Window* container)
+      : container_(container) {}
+  virtual ~SimpleWindowListProvider() {}
+
+ private:
+  // WindowListProvider:
+  virtual aura::Window::Windows GetWindowList() const OVERRIDE {
+    return container_->children();
+  }
+
+  virtual void MoveToFront(aura::Window* window) OVERRIDE {
+    CHECK_EQ(container_, window->parent());
+    container_->StackChildAtTop(window);
+  }
+
+  aura::Window* container_;
+
+  DISALLOW_COPY_AND_ASSIGN(SimpleWindowListProvider);
+};
+
+// Tests that when split mode is activated, the windows on the left and right
+// are selected correctly.
+TEST_F(SplitViewControllerTest, SplitModeActivation) {
+  aura::test::TestWindowDelegate delegate;
+  ScopedVector<aura::Window> windows;
+  const int kNumWindows = 6;
+  for (size_t i = 0; i < kNumWindows; ++i) {
+    aura::Window* window = new aura::Window(&delegate);
+    window->Init(aura::WINDOW_LAYER_SOLID_COLOR);
+    root_window()->AddChild(window);
+    windows.push_back(window);
+  }
+
+  SimpleWindowListProvider list_provider(root_window());
+  SplitViewController controller(root_window(), &list_provider, NULL);
+  ASSERT_FALSE(controller.IsSplitViewModeActive());
+
+  controller.ActivateSplitMode(NULL, NULL);
+  ASSERT_TRUE(controller.IsSplitViewModeActive());
+  // The last two windows should be on the left and right, respectively.
+  EXPECT_EQ(windows[kNumWindows - 1], controller.left_window());
+  EXPECT_EQ(windows[kNumWindows - 2], controller.right_window());
+
+  // Select the window that is currently on the left for the right panel. The
+  // windows should switch.
+  controller.ActivateSplitMode(NULL, windows[kNumWindows - 1]);
+  EXPECT_EQ(windows[kNumWindows - 2], controller.left_window());
+  EXPECT_EQ(windows[kNumWindows - 1], controller.right_window());
+
+  controller.ActivateSplitMode(windows[kNumWindows - 1], NULL);
+  EXPECT_EQ(windows[kNumWindows - 1], controller.left_window());
+  EXPECT_EQ(windows[kNumWindows - 2], controller.right_window());
+
+  // Select one of the windows behind the stacks for the right panel. The window
+  // on the left should remain unchanged.
+  controller.ActivateSplitMode(NULL, windows[0]);
+  EXPECT_EQ(windows[kNumWindows - 1], controller.left_window());
+  EXPECT_EQ(windows[0], controller.right_window());

[mfomitchev, 2014/08/14 22:30:20]

Should we also confirm that windows[0] moves to the top of the window provider
list when we do this?

[sadrul, 2014/08/15 00:20:14]

Done.

+
+  controller.ActivateSplitMode(windows[1], NULL);
+  EXPECT_EQ(windows[1], controller.left_window());
+  EXPECT_EQ(windows[0], controller.right_window());

[mfomitchev, 2014/08/14 22:30:20]

Confirm windows[1] moves to the top?

[sadrul, 2014/08/15 00:20:14]

Done.

+}

[mfomitchev, 2014/08/14 22:30:20]

Can you also add a test for passing two non-null windows?

[sadrul, 2014/08/15 00:20:14]

Done.

+
+}  // namespace athena