Exports gesture manager to a separate file and adds its unittests.

athena/home/home_card_gesture_manager_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/home/home_card_gesture_manager.h"
+
+#include "athena/home/home_card_constants.h"
+#include "athena/home/public/home_card.h"
+#include "athena/test/athena_test_base.h"
+#include "base/time/time.h"
+#include "ui/events/event.h"
+#include "ui/events/event_constants.h"
+
+namespace athena {
+
+class HomeCardGestureManagerTest : public test::AthenaTestBase,
+                                   public HomeCardGestureManager::Delegate {
+ public:
+  HomeCardGestureManagerTest()
+      : final_state_(HomeCard::HIDDEN),
+        last_from_state_(HomeCard::HIDDEN),
+        last_to_state_(HomeCard::HIDDEN),
+        last_progress_(0.0f),
+        last_y_(0),
+        progress_count_(0),
+        end_count_(0) {}
+  virtual ~HomeCardGestureManagerTest() {}
+
+  // testing::Test:
+  virtual void SetUp() OVERRIDE {
+    test::AthenaTestBase::SetUp();
+    gesture_manager_.reset(new HomeCardGestureManager(this, screen_bounds()));
+  }
+
+ protected:
+  int GetEndCountAndReset() {
+    int result = end_count_;
+    end_count_ = 0;
+    return result;
+  }
+  int GetProgressCountAndReset() {
+    int result = progress_count_;
+    progress_count_ = 0;
+    return result;
+  }
+
+  // Process a gesture event for our use case.
+  bool ProcessGestureEvent(ui::EventType type, int y) {
+    ui::GestureEvent event(0, y, ui::EF_NONE, base::TimeDelta(),
+                           ui::GestureEventDetails(type, 0, (y - last_y_)));
+    // Assumes the initial location is based on minimized height.
+    if (type == ui::ET_GESTURE_SCROLL_BEGIN) {
+      gfx::Point location = event.location();
+      location.set_y(
+          location.y() - (screen_bounds().bottom() - kHomeCardMinimizedHeight));
+      event.set_location(location);
+    }
+    gesture_manager_->ProcessGestureEvent(&event);
+    last_y_ = y;
+    return event.handled();
+  }
+  void ProcessFlingGesture(float velocity) {
+    ui::GestureEvent event(0, last_y_, ui::EF_NONE, base::TimeDelta(),
+                           ui::GestureEventDetails(
+                               ui::ET_SCROLL_FLING_START, 0, velocity));
+    gesture_manager_->ProcessGestureEvent(&event);
+  }
+
+  HomeCard::State final_state_;
+  HomeCard::State last_from_state_;
+  HomeCard::State last_to_state_;
+  float last_progress_;
+
+ private:
+  gfx::Rect screen_bounds() const {
+    return gfx::Rect(0, 0, 1280, 1024);
+  }
+
+  // HomeCardGestureManager::Delegate:
+  virtual void OnGestureEnded(HomeCard::State final_state) OVERRIDE {
+    final_state_ = final_state;
+    ++end_count_;
+  }
+
+  virtual void OnGestureProgressed(HomeCard::State from_state,
+                                   HomeCard::State to_state,
+                                   float progress) OVERRIDE {
+    last_from_state_ = from_state;
+    last_to_state_ = to_state;
+    last_progress_ = progress;
+    ++progress_count_;
+  }
+
+  int last_y_;
+  int progress_count_;
+  int end_count_;
+  scoped_ptr<HomeCardGestureManager> gesture_manager_;
+
+  DISALLOW_COPY_AND_ASSIGN(HomeCardGestureManagerTest);
+};
+
+TEST_F(HomeCardGestureManagerTest, Basic) {
+  EXPECT_TRUE(ProcessGestureEvent(ui::ET_GESTURE_SCROLL_BEGIN, 1020));
+  EXPECT_EQ(0, GetEndCountAndReset());
+  EXPECT_EQ(0, GetProgressCountAndReset());
+
+  ProcessGestureEvent(ui::ET_GESTURE_SCROLL_UPDATE, 1019);
+  EXPECT_EQ(1, GetProgressCountAndReset());
+  EXPECT_EQ(HomeCard::VISIBLE_MINIMIZED, last_from_state_);
+  EXPECT_EQ(HomeCard::VISIBLE_BOTTOM, last_to_state_);
+  EXPECT_GT(1.0f, last_progress_);
+
+  ProcessGestureEvent(ui::ET_GESTURE_SCROLL_UPDATE, 1010);
+  float progress_1010 = last_progress_;
+  ProcessGestureEvent(ui::ET_GESTURE_SCROLL_UPDATE, 1008);
+  ProcessGestureEvent(ui::ET_GESTURE_SCROLL_UPDATE, 1000);
+  EXPECT_EQ(3, GetProgressCountAndReset());
+  EXPECT_EQ(HomeCard::VISIBLE_MINIMIZED, last_from_state_);
+  EXPECT_EQ(HomeCard::VISIBLE_BOTTOM, last_to_state_);
+  EXPECT_LT(progress_1010, last_progress_);
+
+  ProcessGestureEvent(ui::ET_GESTURE_SCROLL_UPDATE, 900);
+  ProcessGestureEvent(ui::ET_GESTURE_SCROLL_UPDATE, 800);
+  EXPECT_EQ(2, GetProgressCountAndReset());
+  EXPECT_EQ(HomeCard::VISIBLE_BOTTOM, last_from_state_);
+  EXPECT_EQ(HomeCard::VISIBLE_CENTERED, last_to_state_);
+  float progress_800 = last_progress_;
+  EXPECT_GT(1.0f, last_progress_);
+  EXPECT_LT(0.0f, last_progress_);
+
+  ProcessGestureEvent(ui::ET_GESTURE_SCROLL_UPDATE, 790);
+  EXPECT_EQ(HomeCard::VISIBLE_BOTTOM, last_from_state_);
+  EXPECT_EQ(HomeCard::VISIBLE_CENTERED, last_to_state_);
+  EXPECT_LT(progress_800, last_progress_);
+
+  ProcessGestureEvent(ui::ET_GESTURE_SCROLL_UPDATE, 810);
+  EXPECT_EQ(HomeCard::VISIBLE_CENTERED, last_from_state_);
+  EXPECT_EQ(HomeCard::VISIBLE_BOTTOM, last_to_state_);
+  EXPECT_GT(progress_800, (1.0f - last_progress_));
+
+  EXPECT_TRUE(ProcessGestureEvent(ui::ET_GESTURE_SCROLL_END, 810));
+  EXPECT_EQ(1, GetEndCountAndReset());
+  EXPECT_EQ(HomeCard::VISIBLE_BOTTOM, final_state_);
+}
+
+TEST_F(HomeCardGestureManagerTest, FlingUpAtEnd) {
+  EXPECT_TRUE(ProcessGestureEvent(ui::ET_GESTURE_SCROLL_BEGIN, 1020));
+  EXPECT_EQ(0, GetEndCountAndReset());
+  EXPECT_EQ(0, GetProgressCountAndReset());
+
+  ProcessGestureEvent(ui::ET_GESTURE_SCROLL_UPDATE, 1010);
+  ProcessGestureEvent(ui::ET_GESTURE_SCROLL_UPDATE, 800);
+  ProcessFlingGesture(-150.0f);
+  EXPECT_EQ(1, GetEndCountAndReset());
+  EXPECT_EQ(HomeCard::VISIBLE_CENTERED, final_state_);
+}
+
+TEST_F(HomeCardGestureManagerTest, FlingDownAtEnd) {
+  EXPECT_TRUE(ProcessGestureEvent(ui::ET_GESTURE_SCROLL_BEGIN, 1020));
+  EXPECT_EQ(0, GetEndCountAndReset());
+  EXPECT_EQ(0, GetProgressCountAndReset());
+
+  ProcessGestureEvent(ui::ET_GESTURE_SCROLL_UPDATE, 1010);
+  ProcessGestureEvent(ui::ET_GESTURE_SCROLL_UPDATE, 800);
+  ProcessGestureEvent(ui::ET_GESTURE_SCROLL_UPDATE, 200);
+  ProcessFlingGesture(150.0f);
+  EXPECT_EQ(1, GetEndCountAndReset());
+  EXPECT_EQ(HomeCard::VISIBLE_BOTTOM, final_state_);
+}
+
+}  // namespace athena