Add key based scrolling on magnified screen for kiosk mode.

ash/magnifier/magnifier_key_scroller_unittest.cc

Index: ash/magnifier/magnifier_key_scroller_unittest.cc
diff --git a/ash/magnifier/magnifier_key_scroller_unittest.cc b/ash/magnifier/magnifier_key_scroller_unittest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..6c3db63c914ddf67a7c995fd3a5b37c4435814f8
--- /dev/null
+++ b/ash/magnifier/magnifier_key_scroller_unittest.cc
@@ -0,0 +1,111 @@
+// 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 "ash/magnifier/magnifier_key_scroller.h"
+
+#include "ash/magnifier/magnification_controller.h"
+#include "ash/shell.h"
+#include "ash/test/ash_test_base.h"
+#include "ash/wm/window_util.h"
+#include "ui/aura/test/event_generator.h"
+#include "ui/aura/test/test_window_delegate.h"
+
+namespace ash {
+namespace {
+
+class KeyEventDelegate : public aura::test::TestWindowDelegate {
+ public:
+  KeyEventDelegate() {}
+  virtual ~KeyEventDelegate() {}
+
+  // ui::EventHandler overrides:
+  virtual void OnKeyEvent(ui::KeyEvent* event) OVERRIDE {
+    key_event.reset(new ui::KeyEvent(
+        event->type(), event->key_code(), event->flags(), false));
+  }
+
+  const ui::KeyEvent* event() const { return key_event.get(); }
+  void reset() { key_event.reset(); }
+
+ private:
+  scoped_ptr<ui::KeyEvent> key_event;
+
+  DISALLOW_COPY_AND_ASSIGN(KeyEventDelegate);
+};
+
+}  // namespace
+
+typedef ash::test::AshTestBase MagnifierKeyScrollerTest;
+
+TEST_F(MagnifierKeyScrollerTest, Basic) {
+  KeyEventDelegate delegate;
+  scoped_ptr<aura::Window> window(CreateTestWindowInShellWithDelegate(
+      &delegate,
+      0,
+      gfx::Rect(10, 10, 100, 100)));
+  wm::ActivateWindow(window.get());
+
+  MagnifierKeyScroller::ScopedEnablerForTest scoped;
+  Shell* shell = Shell::GetInstance();
+  MagnificationController* controller = shell->magnification_controller();
+  controller->SetEnabled(true);
+
+  EXPECT_EQ("200,150", controller->GetWindowPosition().ToString());
+  aura::test::EventGenerator& generator = GetEventGenerator();
+
+  // Click and Release generates the press event upon release.
+  generator.PressKey(ui::VKEY_DOWN, ui::EF_SHIFT_DOWN);
+  EXPECT_EQ("200,150", controller->GetWindowPosition().ToString());
+  EXPECT_FALSE(delegate.event());
+
+  generator.ReleaseKey(ui::VKEY_DOWN, 0);
+  EXPECT_EQ("200,150", controller->GetWindowPosition().ToString());
+  RunAllPendingInMessageLoop();
+  EXPECT_TRUE(delegate.event());
+  EXPECT_EQ(ui::ET_KEY_PRESSED, delegate.event()->type());
+  delegate.reset();
+
+  // Click and hold scrolls the magnifier screen.
+  generator.PressKey(ui::VKEY_DOWN, ui::EF_SHIFT_DOWN);
+  EXPECT_EQ("200,150", controller->GetWindowPosition().ToString());
+  EXPECT_FALSE(delegate.event());
+
+  generator.PressKey(ui::VKEY_DOWN, ui::EF_SHIFT_DOWN);
+  EXPECT_EQ("200,300", controller->GetWindowPosition().ToString());
+  EXPECT_FALSE(delegate.event());
+
+  generator.ReleaseKey(ui::VKEY_DOWN, 0);
+  EXPECT_EQ("200,300", controller->GetWindowPosition().ToString());
+  EXPECT_FALSE(delegate.event());
+
+  // Events are passed normally when the magnifier is off.
+  controller->SetEnabled(false);
+
+  generator.PressKey(ui::VKEY_DOWN, ui::EF_SHIFT_DOWN);
+  EXPECT_TRUE(delegate.event());
+  EXPECT_EQ(ui::ET_KEY_PRESSED, delegate.event()->type());
+  delegate.reset();
+
+  generator.ReleaseKey(ui::VKEY_DOWN, 0);
+  EXPECT_TRUE(delegate.event());
+  EXPECT_EQ(ui::ET_KEY_RELEASED, delegate.event()->type());
+  delegate.reset();
+
+  generator.PressKey(ui::VKEY_DOWN, ui::EF_SHIFT_DOWN);
+  EXPECT_TRUE(delegate.event());
+  EXPECT_EQ(ui::ET_KEY_PRESSED, delegate.event()->type());
+  delegate.reset();
+
+  generator.PressKey(ui::VKEY_DOWN, ui::EF_SHIFT_DOWN);
+  EXPECT_TRUE(delegate.event());
+  EXPECT_EQ(ui::ET_KEY_PRESSED, delegate.event()->type());
+  delegate.reset();
+
+  generator.ReleaseKey(ui::VKEY_DOWN, 0);
+  EXPECT_TRUE(delegate.event());
+  EXPECT_EQ(ui::ET_KEY_RELEASED, delegate.event()->type());
+  delegate.reset();
+}
+
+}  // namespace ash