Focus launcher if spoken feedback is enabled and no other windows visible.

ash/wm/ash_activation_controller_unittest.cc

+// Copyright (c) 2012 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 "ash/wm/ash_activation_controller.h"
+
+#include "ash/launcher/launcher.h"
+#include "ash/root_window_controller.h"
+#include "ash/shell_delegate.h"
+#include "ash/test/ash_test_base.h"
+#include "ash/wm/property_util.h"
+#include "ui/aura/window.h"
+
+namespace ash {
+
+namespace {
+
+class AshActivationControllerTest : public test::AshTestBase {
+ public:
+  AshActivationControllerTest() {}
+  virtual ~AshActivationControllerTest() {}
+
+  virtual void SetUp() OVERRIDE {
+    test::AshTestBase::SetUp();
+    ash_activation_controller_.reset(new internal::AshActivationController());
+    launcher_ = Launcher::ForPrimaryDisplay();
+    launcher_widget_ = launcher_->widget();
+    launcher_window_ =

[sky, 2012/12/10 15:37:51]

launcher_window_ = launcher_widget_->GetNativeWindow()

[mtomasz, 2012/12/11 05:03:32]

Done.

+        Launcher::ForPrimaryDisplay()->widget()->GetNativeWindow();
+    DCHECK(launcher_ != NULL);

[sky, 2012/12/10 15:37:51]

DCHECK->ASSERT_TRUE Also, this should be between 26/27 otheriwe 27 will have
crashed.

[mtomasz, 2012/12/11 05:03:32]

Done.

+    DCHECK(launcher_widget_ != NULL);
+    DCHECK(launcher_window_ != NULL);
+  }
+
+  void SetSpokenFeedbackState(bool enabled) {
+    if (Shell::GetInstance()->delegate()->IsSpokenFeedbackEnabled() !=
+        enabled) {
+      Shell::GetInstance()->delegate()->ToggleSpokenFeedback();
+    }
+  }
+
+ protected:
+  scoped_ptr<internal::ActivationControllerDelegate> ash_activation_controller_;
+  ash::Launcher* launcher_;

[sky, 2012/12/10 15:37:51]

Member initialize these to NULL.

[mtomasz, 2012/12/11 05:03:32]

Done.

+  views::Widget* launcher_widget_;
+  aura::Window* launcher_window_;
+
+  DISALLOW_COPY_AND_ASSIGN(AshActivationControllerTest);
+};
+
+TEST_F(AshActivationControllerTest, LauncherFallback) {
+  // When spoken feedback is disabled, then fallback should not occur.
+  {
+    SetSpokenFeedbackState(false);
+    aura::Window* result = ash_activation_controller_->WillActivateWindow(NULL);

[sky, 2012/12/10 15:37:51]

Rather than explicitly calling through like this can't you test activation/focus
directly?

[mtomasz, 2012/12/11 05:03:32]

I could, but would it be better? We would loose isolation without gaining
anything since ActivationController is already tested. This unit test checks
correctness of AshActivationController class and nothing more while avoiding
calling external dependencies whenever possible.

[sky, 2012/12/11 16:30:47]

I'm for testing actual window activation since in the end that is what you care
about, especially since you can do it via a unit test still.

[mtomasz, 2012/12/13 07:55:29]

My concern is that I don't think we want AshActivationController's unit tests
fail if AshActivationController is not broken, but ActivationController (or
Launcher) is. That's my main concern. If I depend on ActivationController
(and/or Launcher), then it would happen. I'll do that if you want, though.

I am not sure if I understand correctly. Do you want me to make an end to end
test, like from deactivating the last window and then checking if the launcher
got finally activated? I think this is an integration test with lots of
dependencies. Don't we have a better place for such tests than *_unittest in wm
directory?

[sky, 2012/12/13 19:16:27]

Exactly.
How so? This test has access to everything. It should just be a matter of
showing the test window, closing it and checking the launcher has focus.

[mtomasz, 2012/12/14 05:31:42]

Done.

+    EXPECT_EQ(NULL, result);
+  }
+
+  // When spoken feedback is enabled, then fallback should occur.
+  {
+    SetSpokenFeedbackState(true);
+    aura::Window* result = ash_activation_controller_->WillActivateWindow(NULL);
+    EXPECT_EQ(launcher_window_, result);
+  }
+
+  // No fallback when activating another window.
+  {
+    aura::Window* test_window = CreateTestWindowInShellWithId(0);
+    aura::Window* result = ash_activation_controller_->
+        WillActivateWindow(test_window);
+    EXPECT_EQ(test_window, result);
+  }
+}
+
+TEST_F(AshActivationControllerTest, LauncherFallbackOnShutdown) {
+  SetSpokenFeedbackState(true);
+  // While shutting down a root window controller, activation controller
+  // is notified about destroyed windows and therefore will try to activate
+  // a launcher as fallback, which would result in segmentation faults since
+  // the launcher's window or the workspace's controller may be already
+  // destroyed.
+  GetRootWindowController(Shell::GetActiveRootWindow())->CloseChildWindows();
+
+  aura::Window* result = ash_activation_controller_->WillActivateWindow(NULL);
+  EXPECT_EQ(NULL, result);
+}
+
+}  // namespace
+
+}  // namespace ash