Add action for each button on opt-in IME menu.

ash/common/system/chromeos/ime_menu/ime_menu_tray_unittest.cc

Index: ash/common/system/chromeos/ime_menu/ime_menu_tray_unittest.cc
diff --git a/ash/common/system/chromeos/ime_menu/ime_menu_tray_unittest.cc b/ash/common/system/chromeos/ime_menu/ime_menu_tray_unittest.cc
index 9acd847f322645c731ced56b4e59194b6ad1b1cf..aca9ac493181b82360a7a46d2aa1f87d3513668f 100644
--- a/ash/common/system/chromeos/ime_menu/ime_menu_tray_unittest.cc
+++ b/ash/common/system/chromeos/ime_menu/ime_menu_tray_unittest.cc
@@ -5,6 +5,7 @@
 #include "ash/common/system/chromeos/ime_menu/ime_menu_tray.h"
 
 #include "ash/common/accelerators/accelerator_controller.h"
+#include "ash/common/accessibility_delegate.h"
 #include "ash/common/system/chromeos/ime_menu/ime_list_view.h"
 #include "ash/common/system/status_area_widget.h"
 #include "ash/common/system/tray/ime_info.h"
@@ -236,4 +237,50 @@ TEST_F(ImeMenuTrayTest, TestAccelerator) {
   EXPECT_FALSE(IsBubbleShown());
 }
 
+TEST_F(ImeMenuTrayTest, ShowEmojiKeyset) {
+  WmShell::Get()->system_tray_notifier()->NotifyRefreshIMEMenu(true);
+  ASSERT_TRUE(IsVisible());
+  ASSERT_FALSE(IsTrayBackgroundActive());
+
+  ui::GestureEvent tap(0, 0, 0, base::TimeTicks(),
+                       ui::GestureEventDetails(ui::ET_GESTURE_TAP));
+  GetTray()->PerformAction(tap);
+  EXPECT_TRUE(IsTrayBackgroundActive());
+  EXPECT_TRUE(IsBubbleShown());
+
+  WmShell::Get()->accessibility_delegate()->SetVirtualKeyboardEnabled(true);

[James Cook, 2016/09/14 21:14:28]

optional: The lines might wrap a little better if you put the
AccessibilityDelegate* in a local variable.

[Azure Wei, 2016/09/15 03:44:51]

Done.

+  ASSERT_TRUE(
+      WmShell::Get()->accessibility_delegate()->IsVirtualKeyboardEnabled());
+
+  GetTray()->ShowKeyboardWithKeyset("emoji");
+  // The menu should be hidden.
+  EXPECT_FALSE(IsBubbleShown());
+  // The virtual keyboard should be enabled.
+  ASSERT_TRUE(

[James Cook, 2016/09/14 21:14:28]

nit: This and below could be EXPECT_TRUE. In general, ASSERT_TRUE is for things
that will crash the test if they are false (like a null ptr) or things that are
a precondition for the test to run correctly (like you did at the top of this
test).

[Azure Wei, 2016/09/15 03:44:51]

Done. Thanks.

+      WmShell::Get()->accessibility_delegate()->IsVirtualKeyboardEnabled());
+
+  // Hides the keyboard.
+  GetTray()->OnKeyboardHidden();
+  // The keyboard should still be enabled.
+  ASSERT_TRUE(
+      WmShell::Get()->accessibility_delegate()->IsVirtualKeyboardEnabled());
+}
+
+TEST_F(ImeMenuTrayTest, ForceToShowEmojiKeyset) {
+  WmShell::Get()->accessibility_delegate()->SetVirtualKeyboardEnabled(false);
+  ASSERT_FALSE(
+      WmShell::Get()->accessibility_delegate()->IsVirtualKeyboardEnabled());
+
+  GetTray()->ShowKeyboardWithKeyset("emoji");
+  // The virtual keyboard should be enabled.
+  ASSERT_TRUE(

[James Cook, 2016/09/14 21:14:27]

ditto

[Azure Wei, 2016/09/15 03:44:51]

Done.

+      WmShell::Get()->accessibility_delegate()->IsVirtualKeyboardEnabled());
+
+  // Hides the keyboard.
+  GetTray()->OnKeyboardHidden();
+  // The keyboard should still be disabled.
+  ASSERT_FALSE(
+      WmShell::Get()->accessibility_delegate()->IsVirtualKeyboardEnabled());
+}

[James Cook, 2016/09/14 21:14:27]

Thanks for adding nice, simple tests!

+
 }  // namespace ash