content/child/touch_fling_gesture_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 // Tests for the TouchFlingGestureCurve.
   6
   7 #include "content/child/touch_fling_gesture_curve.h"
   8
   9 #include "base/memory/scoped_ptr.h"
  10 #include "testing/gtest/include/gtest/gtest.h"
  11 #include "third_party/WebKit/public/platform/WebFloatPoint.h"
  12 #include "third_party/WebKit/public/platform/WebFloatSize.h"
  13 #include "third_party/WebKit/public/platform/WebGestureCurve.h"
  14 #include "third_party/WebKit/public/platform/WebGestureCurveTarget.h"
  15 #include "third_party/WebKit/public/platform/WebSize.h"
  16
  17 using blink::WebFloatPoint;
  18 using blink::WebFloatSize;
  19 using blink::WebGestureCurve;
  20 using blink::WebGestureCurveTarget;
  21 using blink::WebSize;
  22
  23 namespace {
  24
  25 class MockGestureCurveTarget : public WebGestureCurveTarget {
  26  public:
  27   virtual bool scrollBy(const WebFloatSize& delta,
  28                         const WebFloatSize& velocity) override {
  29     cumulative_delta_.width += delta.width;
  30     cumulative_delta_.height += delta.height;
  31     current_velocity_ = velocity;
  32     return true;
  33   }
  34
  35   WebFloatSize cumulative_delta() const { return cumulative_delta_; }
  36   void resetCumulativeDelta() { cumulative_delta_ = WebFloatSize(); }
  37
  38   WebFloatSize current_velocity() const { return current_velocity_; }
  39
  40  private:
  41   WebFloatSize cumulative_delta_;
  42   WebFloatSize current_velocity_;
  43 };
  44
  45 } // namespace anonymous
  46
  47 TEST(TouchFlingGestureCurve, flingCurveTouch)
  48 {
  49   double initialVelocity = 5000;
  50   MockGestureCurveTarget target;
  51
  52   scoped_ptr<WebGestureCurve> curve(content::TouchFlingGestureCurve::Create(
  53       WebFloatPoint(initialVelocity, 0), WebSize()));
  54
  55   // Note: the expectations below are dependent on the curve parameters hard
  56   // coded into the create call above.
  57   EXPECT_TRUE(curve->apply(0, &target));
  58   EXPECT_TRUE(curve->apply(0.25, &target));
  59   EXPECT_NEAR(target.current_velocity().width, 1878, 1);
  60   EXPECT_EQ(target.current_velocity().height, 0);
  61   EXPECT_TRUE(curve->apply(0.45f, &target)); // Use non-uniform tick spacing.
  62   EXPECT_TRUE(curve->apply(1, &target));
  63   EXPECT_FALSE(curve->apply(1.5, &target));
  64   EXPECT_NEAR(target.cumulative_delta().width, 1193, 1);
  65   EXPECT_EQ(target.cumulative_delta().height, 0);
  66   EXPECT_EQ(target.current_velocity().width, 0);
  67   EXPECT_EQ(target.current_velocity().height, 0);
  68 }
  69