Refactors code for WebGestureCurve to ui/events/gestures/blink

content/child/web_gesture_curve_impl_unittest.cc

-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "content/child/web_gesture_curve_impl.h"
-
-#include "base/memory/scoped_ptr.h"
-#include "testing/gtest/include/gtest/gtest.h"
-#include "third_party/WebKit/public/platform/WebFloatSize.h"
-#include "third_party/WebKit/public/platform/WebGestureCurve.h"
-#include "third_party/WebKit/public/platform/WebGestureCurveTarget.h"
-#include "ui/events/gestures/fling_curve.h"
-
-using blink::WebFloatSize;
-using blink::WebGestureCurve;
-using blink::WebGestureCurveTarget;
-
-namespace content {
-namespace {
-
-class MockGestureCurveTarget : public WebGestureCurveTarget {
- public:
-  virtual bool scrollBy(const WebFloatSize& delta,
-                        const WebFloatSize& velocity) override {
-    cumulative_delta_.width += delta.width;
-    cumulative_delta_.height += delta.height;
-    current_velocity_ = velocity;
-    return true;
-  }
-
-  const WebFloatSize& cumulative_delta() const { return cumulative_delta_; }
-  const WebFloatSize& current_velocity() const { return current_velocity_; }
-
- private:
-  WebFloatSize cumulative_delta_;
-  WebFloatSize current_velocity_;
-};
-
-}  // namespace anonymous
-
-TEST(WebGestureCurveImplTest, Basic) {
-  gfx::Vector2dF velocity(5000, 0);
-  gfx::Vector2dF offset;
-  base::TimeTicks time;
-  auto curve = WebGestureCurveImpl::CreateFromUICurveForTesting(
-      scoped_ptr<ui::GestureCurve>(new ui::FlingCurve(velocity, time)), offset);
-
-  // coded into the create call above.
-  MockGestureCurveTarget target;
-  EXPECT_TRUE(curve->apply(0, &target));
-  EXPECT_TRUE(curve->apply(0.25, &target));
-  EXPECT_NEAR(target.current_velocity().width, 1878, 1);
-  EXPECT_EQ(target.current_velocity().height, 0);
-  EXPECT_GT(target.cumulative_delta().width, 0);
-  EXPECT_TRUE(curve->apply(0.45, &target));  // Use non-uniform tick spacing.
-
-  // Ensure fling persists even if successive timestamps are identical.
-  gfx::Vector2dF cumulative_delta = target.cumulative_delta();
-  gfx::Vector2dF current_velocity = target.current_velocity();
-  EXPECT_TRUE(curve->apply(0.45, &target));
-  EXPECT_EQ(cumulative_delta, gfx::Vector2dF(target.cumulative_delta()));
-  EXPECT_EQ(current_velocity, gfx::Vector2dF(target.current_velocity()));
-
-  EXPECT_TRUE(curve->apply(0.75, &target));
-  EXPECT_FALSE(curve->apply(1.5, &target));
-  EXPECT_NEAR(target.cumulative_delta().width, 1193, 1);
-  EXPECT_EQ(target.cumulative_delta().height, 0);
-  EXPECT_EQ(target.current_velocity().width, 0);
-  EXPECT_EQ(target.current_velocity().height, 0);
-}
-
-}  // namespace content