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// 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 "ui/events/gestures/fling_curve.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace ui {
TEST(FlingCurveTest, Basic) {
const gfx::Vector2dF velocity(0, 5000);
base::TimeTicks now = base::TimeTicks::Now();
FlingCurve curve(velocity, now);
gfx::Vector2dF delta;
EXPECT_TRUE(curve.ComputeScrollDeltaAtTime(
now + base::TimeDelta::FromMilliseconds(20), &delta));
EXPECT_EQ(0, delta.x());
EXPECT_NEAR(delta.y(), 96, 1);
EXPECT_TRUE(curve.ComputeScrollDeltaAtTime(
now + base::TimeDelta::FromMilliseconds(250), &delta));
EXPECT_EQ(0, delta.x());
EXPECT_NEAR(delta.y(), 705, 1);
EXPECT_FALSE(curve.ComputeScrollDeltaAtTime(
now + base::TimeDelta::FromSeconds(10), &delta));
EXPECT_EQ(0, delta.x());
EXPECT_NEAR(delta.y(), 392, 1);
EXPECT_FALSE(curve.ComputeScrollDeltaAtTime(
now + base::TimeDelta::FromSeconds(20), &delta));
EXPECT_TRUE(delta.IsZero());
}
} // namespace ui
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