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 scroll =
  18       curve.GetScrollAmountAtTime(now + base::TimeDelta::FromMilliseconds(20));
  19   EXPECT_EQ(0, scroll.x());
  20   EXPECT_NEAR(scroll.y(), 96, 1);
  21
  22   scroll =
  23       curve.GetScrollAmountAtTime(now + base::TimeDelta::FromMilliseconds(250));
  24   EXPECT_EQ(0, scroll.x());
  25   EXPECT_NEAR(scroll.y(), 705, 1);
  26
  27   scroll =
  28       curve.GetScrollAmountAtTime(now + base::TimeDelta::FromSeconds(10));
  29   EXPECT_EQ(0, scroll.x());
  30   EXPECT_NEAR(scroll.y(), 392, 1);
  31
  32   EXPECT_TRUE(curve.GetScrollAmountAtTime(
  33       now + base::TimeDelta::FromSeconds(20)).IsZero());
  34 }
  35
  36 }  // namespace ui