CC Animations: Port Impl-only-scrolling to use compositor animation timelines.

cc/trees/layer_tree_host_impl_unittest.cc

 // Copyright 2011 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 "cc/trees/layer_tree_host_impl.h"
 
 #include <algorithm>
 #include <cmath>
 
 #include "base/bind.h"
@@ skipping 414 matching lines @@
   bool did_request_commit_;
   bool did_request_redraw_;
   bool did_request_animate_;
   bool did_request_prepare_tiles_;
   bool did_complete_page_scale_animation_;
   bool reduce_memory_result_;
   base::Closure animation_task_;
   base::TimeDelta requested_animation_delay_;
 };
 
+// A test fixture for new animation timelines tests.
+class LayerTreeHostImplTimelinesTest : public LayerTreeHostImplTest {
+ public:
+  void SetUp() override {
+    LayerTreeSettings settings = DefaultSettings();
+    settings.use_compositor_animation_timelines = true;
+    CreateHostImpl(settings, CreateOutputSurface());
+  }
+};
+
 TEST_F(LayerTreeHostImplTest, NotifyIfCanDrawChanged) {
   bool always_draw = false;
   CheckNotifyCalledIfCanDrawChanged(always_draw);
 }
 
 TEST_F(LayerTreeHostImplTest, CanDrawIncompleteFrames) {
   CreateHostImpl(DefaultSettings(),
                  FakeOutputSurface::CreateAlwaysDrawAndSwap3d());
 
   bool always_draw = true;
@@ skipping 7194 matching lines @@
   EXPECT_EQ(scrolling_layer, host_impl_->CurrentlyScrollingLayer());
 
   host_impl_->Animate(start_time + base::TimeDelta::FromMilliseconds(250));
   host_impl_->UpdateAnimationState(true);
 
   EXPECT_VECTOR_EQ(gfx::ScrollOffset(0, 100),
                    scrolling_layer->CurrentScrollOffset());
   EXPECT_EQ(NULL, host_impl_->CurrentlyScrollingLayer());
 }
 
+// Evolved from LayerTreeHostImplTest.ScrollAnimated.
+TEST_F(LayerTreeHostImplTimelinesTest, ScrollAnimated) {
+  SetupScrollAndContentsLayers(gfx::Size(100, 200));

[loyso (OOO), 2015/07/07 04:14:38]

This is a copy-paste of LayerTreeHostImplTest.ScrollAnimated except different
test fixture (LayerTreeHostImplTimelinesTest). :(

+  DrawFrame();
+
+  base::TimeTicks start_time =
+      base::TimeTicks() + base::TimeDelta::FromMilliseconds(100);
+
+  EXPECT_EQ(InputHandler::SCROLL_STARTED,
+            host_impl_->ScrollAnimated(gfx::Point(), gfx::Vector2d(0, 50)));
+
+  LayerImpl* scrolling_layer = host_impl_->CurrentlyScrollingLayer();
+
+  host_impl_->Animate(start_time);
+  host_impl_->UpdateAnimationState(true);
+
+  EXPECT_EQ(gfx::ScrollOffset(), scrolling_layer->CurrentScrollOffset());
+
+  host_impl_->Animate(start_time + base::TimeDelta::FromMilliseconds(50));
+  host_impl_->UpdateAnimationState(true);
+
+  float y = scrolling_layer->CurrentScrollOffset().y();
+  EXPECT_TRUE(y > 1 && y < 49);
+
+  // Update target.
+  EXPECT_EQ(InputHandler::SCROLL_STARTED,
+            host_impl_->ScrollAnimated(gfx::Point(), gfx::Vector2d(0, 50)));
+
+  host_impl_->Animate(start_time + base::TimeDelta::FromMilliseconds(200));
+  host_impl_->UpdateAnimationState(true);
+
+  y = scrolling_layer->CurrentScrollOffset().y();
+  EXPECT_TRUE(y > 50 && y < 100);
+  EXPECT_EQ(scrolling_layer, host_impl_->CurrentlyScrollingLayer());
+
+  host_impl_->Animate(start_time + base::TimeDelta::FromMilliseconds(250));
+  host_impl_->UpdateAnimationState(true);
+
+  EXPECT_VECTOR_EQ(gfx::ScrollOffset(0, 100),
+                   scrolling_layer->CurrentScrollOffset());
+  EXPECT_EQ(NULL, host_impl_->CurrentlyScrollingLayer());
+}
+
 TEST_F(LayerTreeHostImplTest, InvalidLayerNotAddedToRasterQueue) {
   host_impl_->CreatePendingTree();
 
   Region empty_invalidation;
   scoped_refptr<RasterSource> pile_with_tiles(
       FakePicturePileImpl::CreateFilledPileWithDefaultTileSize(
           gfx::Size(10, 10)));
 
   scoped_ptr<FakePictureLayerImpl> layer =
       FakePictureLayerImpl::Create(host_impl_->pending_tree(), 11);
@@ skipping 419 matching lines @@
   // Hold an unowned pointer to the output surface to use for mock expectations.
   MockReclaimResourcesOutputSurface* mock_output_surface = output_surface.get();
 
   CreateHostImpl(DefaultSettings(), output_surface.Pass());
   EXPECT_CALL(*mock_output_surface, ForceReclaimResources()).Times(1);
   host_impl_->BeginCommit();
 }
 
 }  // namespace
 }  // namespace cc