ui/events/gestures/blink/web_gesture_curve_impl_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/blink/web_gesture_curve_impl.h"
   6
   7 #include "base/memory/scoped_ptr.h"
   8 #include "testing/gtest/include/gtest/gtest.h"
   9 #include "third_party/WebKit/public/platform/WebFloatSize.h"
  10 #include "third_party/WebKit/public/platform/WebGestureCurve.h"
  11 #include "third_party/WebKit/public/platform/WebGestureCurveTarget.h"
  12 #include "ui/events/gestures/fling_curve.h"
  13
  14 using blink::WebFloatSize;
  15 using blink::WebGestureCurve;
  16 using blink::WebGestureCurveTarget;
  17
  18 namespace ui {
  19 namespace {
  20
  21 class MockGestureCurveTarget : public WebGestureCurveTarget {
  22  public:
  23   virtual bool scrollBy(const WebFloatSize& delta,
  24                         const WebFloatSize& velocity) override {
  25     cumulative_delta_.width += delta.width;
  26     cumulative_delta_.height += delta.height;
  27     current_velocity_ = velocity;
  28     return true;
  29   }
  30
  31   const WebFloatSize& cumulative_delta() const { return cumulative_delta_; }
  32   const WebFloatSize& current_velocity() const { return current_velocity_; }
  33
  34  private:
  35   WebFloatSize cumulative_delta_;
  36   WebFloatSize current_velocity_;
  37 };
  38
  39 }  // namespace anonymous
  40
  41 TEST(WebGestureCurveImplTest, Basic) {
  42   gfx::Vector2dF velocity(5000, 0);
  43   gfx::Vector2dF offset;
  44   base::TimeTicks time;
  45   auto curve = WebGestureCurveImpl::CreateFromUICurveForTesting(
  46       scoped_ptr<ui::GestureCurve>(new ui::FlingCurve(velocity, time)), offset);
  47
  48   // coded into the create call above.
  49   MockGestureCurveTarget target;
  50   EXPECT_TRUE(curve->apply(0, &target));
  51   EXPECT_TRUE(curve->apply(0.25, &target));
  52   EXPECT_NEAR(target.current_velocity().width, 1878, 1);
  53   EXPECT_EQ(target.current_velocity().height, 0);
  54   EXPECT_GT(target.cumulative_delta().width, 0);
  55   EXPECT_TRUE(curve->apply(0.45, &target));  // Use non-uniform tick spacing.
  56
  57   // Ensure fling persists even if successive timestamps are identical.
  58   gfx::Vector2dF cumulative_delta = target.cumulative_delta();
  59   gfx::Vector2dF current_velocity = target.current_velocity();
  60   EXPECT_TRUE(curve->apply(0.45, &target));
  61   EXPECT_EQ(cumulative_delta, gfx::Vector2dF(target.cumulative_delta()));
  62   EXPECT_EQ(current_velocity, gfx::Vector2dF(target.current_velocity()));
  63
  64   EXPECT_TRUE(curve->apply(0.75, &target));
  65   EXPECT_FALSE(curve->apply(1.5, &target));
  66   EXPECT_NEAR(target.cumulative_delta().width, 1193, 1);
  67   EXPECT_EQ(target.cumulative_delta().height, 0);
  68   EXPECT_EQ(target.current_velocity().width, 0);
  69   EXPECT_EQ(target.current_velocity().height, 0);
  70 }
  71
  72 }  // namespace ui