Explicit animation support

ui/gfx/compositor/layer_animation_sequence_unittest.cc

+// Copyright (c) 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 "base/basictypes.h"
+#include "base/compiler_specific.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/time.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "ui/gfx/rect.h"
+#include "ui/gfx/transform.h"
+#include "ui/gfx/compositor/layer_animation_delegate.h"
+#include "ui/gfx/compositor/layer_animation_element.h"
+#include "ui/gfx/compositor/layer_animation_sequence.h"
+#include "ui/gfx/compositor/test_utils.h"
+#include "ui/gfx/compositor/test_layer_animation_delegate.h"
+
+namespace ui {
+
+namespace {
+
+// Check that the sequence behaves sanely when it contains no elements.
+TEST(LayerAnimationSequenceTest, NoElement) {
+  LayerAnimationSequence sequence;
+  EXPECT_EQ(sequence.duration(), base::TimeDelta());
+  EXPECT_TRUE(sequence.properties().size() == 0);
+  LayerAnimationElement::AnimatableProperties properties;
+  EXPECT_FALSE(sequence.HasCommonProperty(properties));
+}
+
+// Check that the sequences progresses the delegate as expected when it contains
+// a single element.
+TEST(LayerAnimationSequenceTest, SingleElement) {
+  LayerAnimationSequence sequence;
+  TestLayerAnimationDelegate delegate;
+  float start = 0.0;
+  float middle = 0.5;
+  float target = 1.0;
+  base::TimeDelta delta = base::TimeDelta::FromSeconds(1);
+  sequence.AddElement(
+      LayerAnimationElement::CreateOpacityElement(target, delta));
+
+  for (int i = 0; i < 2; ++i) {
+    delegate.SetOpacityFromAnimation(start);
+    sequence.Progress(base::TimeDelta::FromMilliseconds(0), &delegate);
+    EXPECT_FLOAT_EQ(start, delegate.GetOpacityForAnimation());
+    sequence.Progress(base::TimeDelta::FromMilliseconds(500), &delegate);
+    EXPECT_FLOAT_EQ(middle, delegate.GetOpacityForAnimation());
+    sequence.Progress(base::TimeDelta::FromMilliseconds(1000), &delegate);
+    EXPECT_FLOAT_EQ(target, delegate.GetOpacityForAnimation());
+  }
+
+  EXPECT_TRUE(sequence.properties().size() == 1);
+  EXPECT_TRUE(sequence.properties().find(LayerAnimationElement::OPACITY) !=
+              sequence.properties().end());
+  EXPECT_EQ(delta, sequence.duration());
+}
+
+// Check that the sequences progresses the delegate as expected when it contains
+// multiple elements. Note, see the layer animator tests for cyclic sequences.
+TEST(LayerAnimationSequenceTest, MultipleElement) {
+  LayerAnimationSequence sequence;
+  TestLayerAnimationDelegate delegate;
+  float start_opacity = 0.0;
+  float middle_opacity = 0.5;
+  float target_opacity = 1.0;
+  base::TimeDelta delta = base::TimeDelta::FromSeconds(1);
+  sequence.AddElement(
+      LayerAnimationElement::CreateOpacityElement(target_opacity, delta));
+
+  // Pause bounds for a second.
+  LayerAnimationElement::AnimatableProperties properties;
+  properties.insert(LayerAnimationElement::BOUNDS);
+
+  sequence.AddElement(
+      LayerAnimationElement::CreatePauseElement(properties, delta));
+
+  Transform start_transform, target_transform, middle_transform;
+  start_transform.SetRotate(-90);
+  target_transform.SetRotate(90);
+
+  sequence.AddElement(
+      LayerAnimationElement::CreateTransformElement(target_transform, delta));
+
+  for (int i = 0; i < 2; ++i) {
+    delegate.SetOpacityFromAnimation(start_opacity);
+    delegate.SetTransformFromAnimation(start_transform);
+
+    sequence.Progress(base::TimeDelta::FromMilliseconds(0), &delegate);
+    EXPECT_FLOAT_EQ(start_opacity, delegate.GetOpacityForAnimation());
+    sequence.Progress(base::TimeDelta::FromMilliseconds(500), &delegate);
+    EXPECT_FLOAT_EQ(middle_opacity, delegate.GetOpacityForAnimation());
+    sequence.Progress(base::TimeDelta::FromMilliseconds(1000), &delegate);
+    EXPECT_FLOAT_EQ(target_opacity, delegate.GetOpacityForAnimation());
+    TestLayerAnimationDelegate copy = delegate;
+
+    // In the middle of the pause -- nothing should have changed.
+    sequence.Progress(base::TimeDelta::FromMilliseconds(1500), &delegate);
+    CheckApproximatelyEqual(delegate.GetBoundsForAnimation(),
+                            copy.GetBoundsForAnimation());
+    CheckApproximatelyEqual(delegate.GetTransformForAnimation(),
+                            copy.GetTransformForAnimation());
+    EXPECT_FLOAT_EQ(delegate.GetOpacityForAnimation(),
+                    copy.GetOpacityForAnimation());
+
+
+    sequence.Progress(base::TimeDelta::FromMilliseconds(2000), &delegate);
+    CheckApproximatelyEqual(start_transform,
+                            delegate.GetTransformForAnimation());
+    sequence.Progress(base::TimeDelta::FromMilliseconds(2500), &delegate);
+    CheckApproximatelyEqual(middle_transform,
+                            delegate.GetTransformForAnimation());
+    sequence.Progress(base::TimeDelta::FromMilliseconds(3000), &delegate);
+    CheckApproximatelyEqual(target_transform,
+                            delegate.GetTransformForAnimation());
+  }
+
+  EXPECT_TRUE(sequence.properties().size() == 3);
+  EXPECT_TRUE(sequence.properties().find(LayerAnimationElement::OPACITY) !=
+              sequence.properties().end());
+  EXPECT_TRUE(sequence.properties().find(LayerAnimationElement::TRANSFORM) !=
+              sequence.properties().end());
+  EXPECT_TRUE(sequence.properties().find(LayerAnimationElement::BOUNDS) !=
+              sequence.properties().end());
+  EXPECT_EQ(delta + delta + delta, sequence.duration());
+}
+
+} // namespace
+
+} // namespace ui