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
   9 namespace ui {
  10
  11 TEST(FlingCurveTest, Basic) {
  12   const gfx::Vector2dF velocity(0, 5000);
  13   base::TimeTicks now = base::TimeTicks::Now();
  14   FlingCurve curve(velocity, now);
  15
  16   gfx::Vector2dF delta;
  17   EXPECT_TRUE(curve.ComputeScrollDeltaAtTime(
  18       now + base::TimeDelta::FromMilliseconds(20), &delta));
  19   EXPECT_EQ(0, delta.x());
  20   EXPECT_NEAR(delta.y(), 96, 1);
  21
  22   EXPECT_TRUE(curve.ComputeScrollDeltaAtTime(
  23       now + base::TimeDelta::FromMilliseconds(250), &delta));
  24   EXPECT_EQ(0, delta.x());
  25   EXPECT_NEAR(delta.y(), 705, 1);
  26
  27   EXPECT_FALSE(curve.ComputeScrollDeltaAtTime(
  28       now + base::TimeDelta::FromSeconds(10), &delta));
  29   EXPECT_EQ(0, delta.x());
  30   EXPECT_NEAR(delta.y(), 392, 1);
  31
  32   EXPECT_FALSE(curve.ComputeScrollDeltaAtTime(
  33       now + base::TimeDelta::FromSeconds(20), &delta));
  34   EXPECT_TRUE(delta.IsZero());
  35 }
  36
  37 }  // namespace ui