Implement "pinned" mode in ash.

ash/wm/screen_pinning_controller_unittest.cc

Index: ash/wm/screen_pinning_controller_unittest.cc
diff --git a/ash/wm/screen_pinning_controller_unittest.cc b/ash/wm/screen_pinning_controller_unittest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..c5334a67e80a6a9b8859ae967498543f5374a6f8
--- /dev/null
+++ b/ash/wm/screen_pinning_controller_unittest.cc
@@ -0,0 +1,155 @@
+// Copyright 2016 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/screen_pinning_controller.h"
+
+#include <vector>
+
+#include "ash/aura/wm_window_aura.h"
+#include "ash/common/wm/window_state.h"
+#include "ash/common/wm/wm_event.h"
+#include "ash/common/wm_shell.h"
+#include "ash/common/wm_window.h"
+#include "ash/test/ash_test_base.h"
+#include "ash/wm/window_util.h"
+#include "base/stl_util.h"
+#include "ui/aura/window.h"
+
+namespace ash {
+namespace {
+
+int FindIndex(const std::vector<aura::Window*>& windows,
+              const aura::Window* target) {
+  auto iter = std::find(windows.begin(), windows.end(), target);
+  return iter != windows.end() ? iter - windows.begin() : -1;
+}
+
+}  // namespace
+
+using ScreenPinningControllerTest = test::AshTestBase;
+
+TEST_F(ScreenPinningControllerTest, IsPinned) {
+  aura::Window* w1 = CreateTestWindowInShellWithId(0);
+  wm::ActivateWindow(w1);
+
+  wm::PinWindow(w1);
+  EXPECT_TRUE(WmShell::Get()->IsPinned());
+}
+
+TEST_F(ScreenPinningControllerTest, OnlyOnePinnedWindow) {
+  aura::Window* w1 = CreateTestWindowInShellWithId(0);
+  aura::Window* w2 = CreateTestWindowInShellWithId(1);
+  wm::ActivateWindow(w1);
+
+  wm::PinWindow(w1);
+  EXPECT_TRUE(WmWindowAura::Get(w1)->GetWindowState()->IsPinned());
+  EXPECT_FALSE(WmWindowAura::Get(w2)->GetWindowState()->IsPinned());
+
+  // Prohibit to pin two (or more) windows.
+  wm::PinWindow(w2);
+  EXPECT_TRUE(WmWindowAura::Get(w1)->GetWindowState()->IsPinned());
+  EXPECT_FALSE(WmWindowAura::Get(w2)->GetWindowState()->IsPinned());
+}
+
+TEST_F(ScreenPinningControllerTest, FullscreenInPinnedMode) {
+  aura::Window* w1 = CreateTestWindowInShellWithId(0);
+  aura::Window* w2 = CreateTestWindowInShellWithId(1);
+  wm::ActivateWindow(w1);
+
+  wm::PinWindow(w1);
+  {
+    // Window w1 should be in front of w2.
+    std::vector<aura::Window*> siblings = w1->parent()->children();
+    int index1 = FindIndex(siblings, w1);
+    int index2 = FindIndex(siblings, w2);
+    EXPECT_NE(-1, index1);
+    EXPECT_NE(-1, index2);
+    EXPECT_GT(index1, index2);
+  }
+
+  // Set w2 to fullscreen.
+  {
+    wm::ActivateWindow(w2);
+    const wm::WMEvent event(wm::WM_EVENT_TOGGLE_FULLSCREEN);
+    WmWindowAura::Get(w2)->GetWindowState()->OnWMEvent(&event);
+  }
+  {
+    // Verify that w1 is still in front of w2.
+    std::vector<aura::Window*> siblings = w1->parent()->children();
+    int index1 = FindIndex(siblings, w1);
+    int index2 = FindIndex(siblings, w2);
+    EXPECT_NE(-1, index1);
+    EXPECT_NE(-1, index2);
+    EXPECT_GT(index1, index2);
+  }
+
+  // Unset w2's fullscreen.
+  {
+    wm::ActivateWindow(w2);
+    const wm::WMEvent event(wm::WM_EVENT_TOGGLE_FULLSCREEN);
+    WmWindowAura::Get(w2)->GetWindowState()->OnWMEvent(&event);
+  }
+  {
+    // Verify that w1 is still in front of w2.
+    std::vector<aura::Window*> siblings = w1->parent()->children();
+    int index1 = FindIndex(siblings, w1);
+    int index2 = FindIndex(siblings, w2);
+    EXPECT_NE(-1, index1);
+    EXPECT_NE(-1, index2);
+    EXPECT_GT(index1, index2);
+  }
+
+  // Maximize w2.
+  {
+    wm::ActivateWindow(w2);
+    const wm::WMEvent event(wm::WM_EVENT_TOGGLE_MAXIMIZE);
+    WmWindowAura::Get(w2)->GetWindowState()->OnWMEvent(&event);
+  }
+  {
+    // Verify that w1 is still in front of w2.
+    std::vector<aura::Window*> siblings = w1->parent()->children();
+    int index1 = FindIndex(siblings, w1);
+    int index2 = FindIndex(siblings, w2);
+    EXPECT_NE(-1, index1);
+    EXPECT_NE(-1, index2);
+    EXPECT_GT(index1, index2);
+  }
+
+  // Unset w2's maximize.
+  {
+    wm::ActivateWindow(w2);
+    const wm::WMEvent event(wm::WM_EVENT_TOGGLE_MAXIMIZE);
+    WmWindowAura::Get(w2)->GetWindowState()->OnWMEvent(&event);
+  }
+  {
+    // Verify that w1 is still in front of w2.
+    std::vector<aura::Window*> siblings = w1->parent()->children();
+    int index1 = FindIndex(siblings, w1);
+    int index2 = FindIndex(siblings, w2);
+    EXPECT_NE(-1, index1);
+    EXPECT_NE(-1, index2);
+    EXPECT_GT(index1, index2);
+  }
+
+  // Restore w1.
+  WmWindowAura::Get(w1)->GetWindowState()->Restore();
+
+  // Now, fullscreen-ize w2 should put it in front of w1.
+  {
+    wm::ActivateWindow(w2);
+    const wm::WMEvent event(wm::WM_EVENT_TOGGLE_FULLSCREEN);
+    WmWindowAura::Get(w2)->GetWindowState()->OnWMEvent(&event);
+  }
+  {
+    // Verify that w1 is still in front of w2.
+    std::vector<aura::Window*> siblings = w1->parent()->children();
+    int index1 = FindIndex(siblings, w1);
+    int index2 = FindIndex(siblings, w2);
+    EXPECT_NE(-1, index1);
+    EXPECT_NE(-1, index2);
+    EXPECT_GT(index2, index1);
+  }
+}
+
+}  // namespace ash