ui/events/gestures/fling_curve_unittest.cc

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "ui/events/gestures/fling_curve.h"
   6
   7 #include "testing/gtest/include/gtest/gtest.h"
   8 #include "ui/gfx/frame_time.h"
   9
  10 namespace ui {
  11
  12 TEST(FlingCurveTest, Basic) {
  13   const gfx::Vector2dF velocity(0, 5000);
  14   base::TimeTicks now = gfx::FrameTime::Now();
  15   FlingCurve curve(velocity, now);
  16
  17   gfx::Vector2dF delta;
  18   EXPECT_TRUE(curve.ComputeScrollDeltaAtTime(
  19       now + base::TimeDelta::FromMilliseconds(20), &delta));
  20   EXPECT_EQ(0, delta.x());
  21   EXPECT_NEAR(delta.y(), 96, 1);
  22
  23   EXPECT_TRUE(curve.ComputeScrollDeltaAtTime(
  24       now + base::TimeDelta::FromMilliseconds(250), &delta));
  25   EXPECT_EQ(0, delta.x());
  26   EXPECT_NEAR(delta.y(), 705, 1);
  27
  28   EXPECT_FALSE(curve.ComputeScrollDeltaAtTime(
  29       now + base::TimeDelta::FromSeconds(10), &delta));
  30   EXPECT_EQ(0, delta.x());
  31   EXPECT_NEAR(delta.y(), 392, 1);
  32
  33   EXPECT_FALSE(curve.ComputeScrollDeltaAtTime(
  34       now + base::TimeDelta::FromSeconds(20), &delta));
  35   EXPECT_TRUE(delta.IsZero());
  36 }
  37
  38 }  // namespace ui