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// Copyright 2012 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/keyframed_animation_curve.h"
#include "cc/transform_operations.h"
#include "testing/gmock/include/gmock/gmock.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace cc {
namespace {
void expectTranslateX(double translateX, const gfx::Transform& transform)
{
EXPECT_FLOAT_EQ(translateX, transform.matrix().getDouble(0, 3));
}
// Tests that a float animation with one keyframe works as expected.
TEST(KeyframedAnimationCurveTest, OneFloatKeyframe)
{
scoped_ptr<KeyframedFloatAnimationCurve> curve(KeyframedFloatAnimationCurve::create());
curve->addKeyframe(FloatKeyframe::create(0, 2, scoped_ptr<TimingFunction>()));
EXPECT_FLOAT_EQ(2, curve->getValue(-1));
EXPECT_FLOAT_EQ(2, curve->getValue(0));
EXPECT_FLOAT_EQ(2, curve->getValue(0.5));
EXPECT_FLOAT_EQ(2, curve->getValue(1));
EXPECT_FLOAT_EQ(2, curve->getValue(2));
}
// Tests that a float animation with two keyframes works as expected.
TEST(KeyframedAnimationCurveTest, TwoFloatKeyframe)
{
scoped_ptr<KeyframedFloatAnimationCurve> curve(KeyframedFloatAnimationCurve::create());
curve->addKeyframe(FloatKeyframe::create(0, 2, scoped_ptr<TimingFunction>()));
curve->addKeyframe(FloatKeyframe::create(1, 4, scoped_ptr<TimingFunction>()));
EXPECT_FLOAT_EQ(2, curve->getValue(-1));
EXPECT_FLOAT_EQ(2, curve->getValue(0));
EXPECT_FLOAT_EQ(3, curve->getValue(0.5));
EXPECT_FLOAT_EQ(4, curve->getValue(1));
EXPECT_FLOAT_EQ(4, curve->getValue(2));
}
// Tests that a float animation with three keyframes works as expected.
TEST(KeyframedAnimationCurveTest, ThreeFloatKeyframe)
{
scoped_ptr<KeyframedFloatAnimationCurve> curve(KeyframedFloatAnimationCurve::create());
curve->addKeyframe(FloatKeyframe::create(0, 2, scoped_ptr<TimingFunction>()));
curve->addKeyframe(FloatKeyframe::create(1, 4, scoped_ptr<TimingFunction>()));
curve->addKeyframe(FloatKeyframe::create(2, 8, scoped_ptr<TimingFunction>()));
EXPECT_FLOAT_EQ(2, curve->getValue(-1));
EXPECT_FLOAT_EQ(2, curve->getValue(0));
EXPECT_FLOAT_EQ(3, curve->getValue(0.5));
EXPECT_FLOAT_EQ(4, curve->getValue(1));
EXPECT_FLOAT_EQ(6, curve->getValue(1.5));
EXPECT_FLOAT_EQ(8, curve->getValue(2));
EXPECT_FLOAT_EQ(8, curve->getValue(3));
}
// Tests that a float animation with multiple keys at a given time works sanely.
TEST(KeyframedAnimationCurveTest, RepeatedFloatKeyTimes)
{
scoped_ptr<KeyframedFloatAnimationCurve> curve(KeyframedFloatAnimationCurve::create());
curve->addKeyframe(FloatKeyframe::create(0, 4, scoped_ptr<TimingFunction>()));
curve->addKeyframe(FloatKeyframe::create(1, 4, scoped_ptr<TimingFunction>()));
curve->addKeyframe(FloatKeyframe::create(1, 6, scoped_ptr<TimingFunction>()));
curve->addKeyframe(FloatKeyframe::create(2, 6, scoped_ptr<TimingFunction>()));
EXPECT_FLOAT_EQ(4, curve->getValue(-1));
EXPECT_FLOAT_EQ(4, curve->getValue(0));
EXPECT_FLOAT_EQ(4, curve->getValue(0.5));
// There is a discontinuity at 1. Any value between 4 and 6 is valid.
float value = curve->getValue(1);
EXPECT_TRUE(value >= 4 && value <= 6);
EXPECT_FLOAT_EQ(6, curve->getValue(1.5));
EXPECT_FLOAT_EQ(6, curve->getValue(2));
EXPECT_FLOAT_EQ(6, curve->getValue(3));
}
// Tests that a transform animation with one keyframe works as expected.
TEST(KeyframedAnimationCurveTest, OneTransformKeyframe)
{
scoped_ptr<KeyframedTransformAnimationCurve> curve(KeyframedTransformAnimationCurve::create());
TransformOperations operations;
operations.AppendTranslate(2, 0, 0);
curve->addKeyframe(TransformKeyframe::create(0, operations, scoped_ptr<TimingFunction>()));
expectTranslateX(2, curve->getValue(-1));
expectTranslateX(2, curve->getValue(0));
expectTranslateX(2, curve->getValue(0.5));
expectTranslateX(2, curve->getValue(1));
expectTranslateX(2, curve->getValue(2));
}
// Tests that a transform animation with two keyframes works as expected.
TEST(KeyframedAnimationCurveTest, TwoTransformKeyframe)
{
scoped_ptr<KeyframedTransformAnimationCurve> curve(KeyframedTransformAnimationCurve::create());
TransformOperations operations1;
operations1.AppendTranslate(2, 0, 0);
TransformOperations operations2;
operations2.AppendTranslate(4, 0, 0);
curve->addKeyframe(TransformKeyframe::create(0, operations1, scoped_ptr<TimingFunction>()));
curve->addKeyframe(TransformKeyframe::create(1, operations2, scoped_ptr<TimingFunction>()));
expectTranslateX(2, curve->getValue(-1));
expectTranslateX(2, curve->getValue(0));
expectTranslateX(3, curve->getValue(0.5));
expectTranslateX(4, curve->getValue(1));
expectTranslateX(4, curve->getValue(2));
}
// Tests that a transform animation with three keyframes works as expected.
TEST(KeyframedAnimationCurveTest, ThreeTransformKeyframe)
{
scoped_ptr<KeyframedTransformAnimationCurve> curve(KeyframedTransformAnimationCurve::create());
TransformOperations operations1;
operations1.AppendTranslate(2, 0, 0);
TransformOperations operations2;
operations2.AppendTranslate(4, 0, 0);
TransformOperations operations3;
operations3.AppendTranslate(8, 0, 0);
curve->addKeyframe(TransformKeyframe::create(0, operations1, scoped_ptr<TimingFunction>()));
curve->addKeyframe(TransformKeyframe::create(1, operations2, scoped_ptr<TimingFunction>()));
curve->addKeyframe(TransformKeyframe::create(2, operations3, scoped_ptr<TimingFunction>()));
expectTranslateX(2, curve->getValue(-1));
expectTranslateX(2, curve->getValue(0));
expectTranslateX(3, curve->getValue(0.5));
expectTranslateX(4, curve->getValue(1));
expectTranslateX(6, curve->getValue(1.5));
expectTranslateX(8, curve->getValue(2));
expectTranslateX(8, curve->getValue(3));
}
// Tests that a transform animation with multiple keys at a given time works sanely.
TEST(KeyframedAnimationCurveTest, RepeatedTransformKeyTimes)
{
scoped_ptr<KeyframedTransformAnimationCurve> curve(KeyframedTransformAnimationCurve::create());
// A step function.
TransformOperations operations1;
operations1.AppendTranslate(4, 0, 0);
TransformOperations operations2;
operations2.AppendTranslate(4, 0, 0);
TransformOperations operations3;
operations3.AppendTranslate(6, 0, 0);
TransformOperations operations4;
operations4.AppendTranslate(6, 0, 0);
curve->addKeyframe(TransformKeyframe::create(0, operations1, scoped_ptr<TimingFunction>()));
curve->addKeyframe(TransformKeyframe::create(1, operations2, scoped_ptr<TimingFunction>()));
curve->addKeyframe(TransformKeyframe::create(1, operations3, scoped_ptr<TimingFunction>()));
curve->addKeyframe(TransformKeyframe::create(2, operations4, scoped_ptr<TimingFunction>()));
expectTranslateX(4, curve->getValue(-1));
expectTranslateX(4, curve->getValue(0));
expectTranslateX(4, curve->getValue(0.5));
// There is a discontinuity at 1. Any value between 4 and 6 is valid.
gfx::Transform value = curve->getValue(1);
EXPECT_TRUE(value.matrix().getDouble(0, 3) >= 4 && value.matrix().getDouble(0, 3) <= 6);
expectTranslateX(6, curve->getValue(1.5));
expectTranslateX(6, curve->getValue(2));
expectTranslateX(6, curve->getValue(3));
}
// Tests that the keyframes may be added out of order.
TEST(KeyframedAnimationCurveTest, UnsortedKeyframes)
{
scoped_ptr<KeyframedFloatAnimationCurve> curve(KeyframedFloatAnimationCurve::create());
curve->addKeyframe(FloatKeyframe::create(2, 8, scoped_ptr<TimingFunction>()));
curve->addKeyframe(FloatKeyframe::create(0, 2, scoped_ptr<TimingFunction>()));
curve->addKeyframe(FloatKeyframe::create(1, 4, scoped_ptr<TimingFunction>()));
EXPECT_FLOAT_EQ(2, curve->getValue(-1));
EXPECT_FLOAT_EQ(2, curve->getValue(0));
EXPECT_FLOAT_EQ(3, curve->getValue(0.5));
EXPECT_FLOAT_EQ(4, curve->getValue(1));
EXPECT_FLOAT_EQ(6, curve->getValue(1.5));
EXPECT_FLOAT_EQ(8, curve->getValue(2));
EXPECT_FLOAT_EQ(8, curve->getValue(3));
}
// Tests that a cubic bezier timing function works as expected.
TEST(KeyframedAnimationCurveTest, CubicBezierTimingFunction)
{
scoped_ptr<KeyframedFloatAnimationCurve> curve(KeyframedFloatAnimationCurve::create());
curve->addKeyframe(FloatKeyframe::create(0, 0, CubicBezierTimingFunction::create(0.25, 0, 0.75, 1).PassAs<TimingFunction>()));
curve->addKeyframe(FloatKeyframe::create(1, 1, scoped_ptr<TimingFunction>()));
EXPECT_FLOAT_EQ(0, curve->getValue(0));
EXPECT_LT(0, curve->getValue(0.25));
EXPECT_GT(0.25, curve->getValue(0.25));
EXPECT_NEAR(curve->getValue(0.5), 0.5, 0.00015);
EXPECT_LT(0.75, curve->getValue(0.75));
EXPECT_GT(1, curve->getValue(0.75));
EXPECT_FLOAT_EQ(1, curve->getValue(1));
}
} // namespace
} // namespace cc
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