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// 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 "ui/events/gestures/blink/web_gesture_curve_impl.h"
#include <memory>
#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 ui {
namespace {
class MockGestureCurveTarget : public WebGestureCurveTarget {
public:
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(
std::unique_ptr<ui::GestureCurve>(new ui::FlingCurve(velocity, time)),
offset);
// coded into the create call above.
MockGestureCurveTarget target;
EXPECT_TRUE(curve->AdvanceAndApplyToTarget(0, &target));
EXPECT_TRUE(curve->AdvanceAndApplyToTarget(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->AdvanceAndApplyToTarget(
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->AdvanceAndApplyToTarget(0.45, &target));
EXPECT_EQ(cumulative_delta, gfx::Vector2dF(target.cumulative_delta()));
EXPECT_EQ(current_velocity, gfx::Vector2dF(target.current_velocity()));
EXPECT_TRUE(curve->AdvanceAndApplyToTarget(0.75, &target));
EXPECT_FALSE(curve->AdvanceAndApplyToTarget(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 ui
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