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// Copyright 2013 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/animation/scroll_offset_animation_curve.h"
#include "cc/animation/timing_function.h"
#include "cc/base/time_util.h"
#include "cc/test/geometry_test_utils.h"
#include "testing/gtest/include/gtest/gtest.h"
const double kConstantDuration = 9.0;
const double kDurationDivisor = 60.0;
namespace cc {
namespace {
TEST(ScrollOffsetAnimationCurveTest, DeltaBasedDuration) {
gfx::ScrollOffset target_value(100.f, 200.f);
scoped_ptr<ScrollOffsetAnimationCurve> curve(
ScrollOffsetAnimationCurve::Create(target_value,
EaseInOutTimingFunction::Create()));
curve->SetInitialValue(target_value);
EXPECT_DOUBLE_EQ(0.0, curve->Duration().InSecondsF());
// x decreases, y stays the same.
curve->SetInitialValue(gfx::ScrollOffset(136.f, 200.f));
EXPECT_DOUBLE_EQ(0.1, curve->Duration().InSecondsF());
// x increases, y stays the same.
curve->SetInitialValue(gfx::ScrollOffset(19.f, 200.f));
EXPECT_DOUBLE_EQ(0.15, curve->Duration().InSecondsF());
// x stays the same, y decreases.
curve->SetInitialValue(gfx::ScrollOffset(100.f, 344.f));
EXPECT_DOUBLE_EQ(0.2, curve->Duration().InSecondsF());
// x stays the same, y increases.
curve->SetInitialValue(gfx::ScrollOffset(100.f, 191.f));
EXPECT_DOUBLE_EQ(0.05, curve->Duration().InSecondsF());
// x decreases, y decreases.
curve->SetInitialValue(gfx::ScrollOffset(32500.f, 500.f));
EXPECT_DOUBLE_EQ(3.0, curve->Duration().InSecondsF());
// x decreases, y increases.
curve->SetInitialValue(gfx::ScrollOffset(150.f, 119.f));
EXPECT_DOUBLE_EQ(0.15, curve->Duration().InSecondsF());
// x increases, y decreases.
curve->SetInitialValue(gfx::ScrollOffset(0.f, 14600.f));
EXPECT_DOUBLE_EQ(2.0, curve->Duration().InSecondsF());
// x increases, y increases.
curve->SetInitialValue(gfx::ScrollOffset(95.f, 191.f));
EXPECT_DOUBLE_EQ(0.05, curve->Duration().InSecondsF());
}
TEST(ScrollOffsetAnimationCurveTest, GetValue) {
gfx::ScrollOffset initial_value(2.f, 40.f);
gfx::ScrollOffset target_value(10.f, 20.f);
scoped_ptr<ScrollOffsetAnimationCurve> curve(
ScrollOffsetAnimationCurve::Create(target_value,
EaseInOutTimingFunction::Create()));
curve->SetInitialValue(initial_value);
base::TimeDelta duration = curve->Duration();
EXPECT_GT(curve->Duration().InSecondsF(), 0);
EXPECT_LT(curve->Duration().InSecondsF(), 0.1);
EXPECT_EQ(AnimationCurve::SCROLL_OFFSET, curve->Type());
EXPECT_EQ(duration, curve->Duration());
EXPECT_VECTOR2DF_EQ(initial_value,
curve->GetValue(base::TimeDelta::FromSecondsD(-1.0)));
EXPECT_VECTOR2DF_EQ(initial_value, curve->GetValue(base::TimeDelta()));
EXPECT_VECTOR2DF_NEAR(gfx::ScrollOffset(6.f, 30.f),
curve->GetValue(TimeUtil::Scale(duration, 0.5f)),
0.00025);
EXPECT_VECTOR2DF_EQ(target_value, curve->GetValue(duration));
EXPECT_VECTOR2DF_EQ(
target_value,
curve->GetValue(duration + base::TimeDelta::FromSecondsD(1.0)));
// Verify that GetValue takes the timing function into account.
gfx::ScrollOffset value = curve->GetValue(TimeUtil::Scale(duration, 0.25f));
EXPECT_NEAR(3.0333f, value.x(), 0.0002f);
EXPECT_NEAR(37.4168f, value.y(), 0.0002f);
}
// Verify that a clone behaves exactly like the original.
TEST(ScrollOffsetAnimationCurveTest, Clone) {
gfx::ScrollOffset initial_value(2.f, 40.f);
gfx::ScrollOffset target_value(10.f, 20.f);
scoped_ptr<ScrollOffsetAnimationCurve> curve(
ScrollOffsetAnimationCurve::Create(target_value,
EaseInOutTimingFunction::Create()));
curve->SetInitialValue(initial_value);
base::TimeDelta duration = curve->Duration();
scoped_ptr<AnimationCurve> clone(curve->Clone());
EXPECT_EQ(AnimationCurve::SCROLL_OFFSET, clone->Type());
EXPECT_EQ(duration, clone->Duration());
EXPECT_VECTOR2DF_EQ(initial_value,
clone->ToScrollOffsetAnimationCurve()->GetValue(
base::TimeDelta::FromSecondsD(-1.0)));
EXPECT_VECTOR2DF_EQ(
initial_value,
clone->ToScrollOffsetAnimationCurve()->GetValue(base::TimeDelta()));
EXPECT_VECTOR2DF_NEAR(gfx::ScrollOffset(6.f, 30.f),
clone->ToScrollOffsetAnimationCurve()->GetValue(
TimeUtil::Scale(duration, 0.5f)),
0.00025);
EXPECT_VECTOR2DF_EQ(
target_value, clone->ToScrollOffsetAnimationCurve()->GetValue(duration));
EXPECT_VECTOR2DF_EQ(target_value,
clone->ToScrollOffsetAnimationCurve()->GetValue(
duration + base::TimeDelta::FromSecondsD(1.f)));
// Verify that the timing function was cloned correctly.
gfx::ScrollOffset value = clone->ToScrollOffsetAnimationCurve()->GetValue(
TimeUtil::Scale(duration, 0.25f));
EXPECT_NEAR(3.0333f, value.x(), 0.0002f);
EXPECT_NEAR(37.4168f, value.y(), 0.0002f);
}
TEST(ScrollOffsetAnimationCurveTest, UpdateTarget) {
gfx::ScrollOffset initial_value(0.f, 0.f);
gfx::ScrollOffset target_value(0.f, 3600.f);
double duration = kConstantDuration / kDurationDivisor;
scoped_ptr<ScrollOffsetAnimationCurve> curve(
ScrollOffsetAnimationCurve::Create(
target_value, EaseInOutTimingFunction::Create(),
ScrollOffsetAnimationCurve::DurationBehavior::CONSTANT));
curve->SetInitialValue(initial_value);
EXPECT_NEAR(duration, curve->Duration().InSecondsF(), 0.0002f);
EXPECT_NEAR(
1800.0,
curve->GetValue(base::TimeDelta::FromSecondsD(duration / 2.0)).y(),
0.0002f);
EXPECT_NEAR(3600.0,
curve->GetValue(base::TimeDelta::FromSecondsD(duration)).y(),
0.0002f);
curve->UpdateTarget(duration / 2, gfx::ScrollOffset(0.0, 9900.0));
EXPECT_NEAR(duration * 1.5, curve->Duration().InSecondsF(), 0.0002f);
EXPECT_NEAR(
1800.0,
curve->GetValue(base::TimeDelta::FromSecondsD(duration / 2.0)).y(),
0.0002f);
EXPECT_NEAR(6827.6,
curve->GetValue(base::TimeDelta::FromSecondsD(duration)).y(),
0.1f);
EXPECT_NEAR(
9900.0,
curve->GetValue(base::TimeDelta::FromSecondsD(duration * 1.5)).y(),
0.0002f);
curve->UpdateTarget(duration, gfx::ScrollOffset(0.0, 7200.0));
// A closer target at high velocity reduces the duration.
EXPECT_NEAR(duration * 1.0794, curve->Duration().InSecondsF(), 0.0002f);
EXPECT_NEAR(6827.6,
curve->GetValue(base::TimeDelta::FromSecondsD(duration)).y(),
0.1f);
EXPECT_NEAR(
7200.0,
curve->GetValue(base::TimeDelta::FromSecondsD(duration * 1.08)).y(),
0.0002f);
}
TEST(ScrollOffsetAnimationCurveTest, InverseDeltaDuration) {
scoped_ptr<ScrollOffsetAnimationCurve> curve(
ScrollOffsetAnimationCurve::Create(
gfx::ScrollOffset(0.f, 100.f), EaseInOutTimingFunction::Create(),
ScrollOffsetAnimationCurve::DurationBehavior::INVERSE_DELTA));
curve->SetInitialValue(gfx::ScrollOffset());
double smallDeltaDuration = curve->Duration().InSecondsF();
curve->UpdateTarget(0.f, gfx::ScrollOffset(0.f, 300.f));
double mediumDeltaDuration = curve->Duration().InSecondsF();
curve->UpdateTarget(0.f, gfx::ScrollOffset(0.f, 500.f));
double largeDeltaDuration = curve->Duration().InSecondsF();
EXPECT_GT(smallDeltaDuration, mediumDeltaDuration);
EXPECT_GT(mediumDeltaDuration, largeDeltaDuration);
curve->UpdateTarget(0.f, gfx::ScrollOffset(0.f, 5000.f));
EXPECT_EQ(largeDeltaDuration, curve->Duration().InSecondsF());
}
} // namespace
} // namespace cc
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