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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 "base/android/scoped_java_ref.h"
#include "cc/layers/layer.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "ui/android/overscroll_refresh.h"
#include "ui/android/overscroll_refresh_handler.h"
namespace ui {
class OverscrollRefreshTest : public OverscrollRefreshHandler,
public testing::Test {
public:
OverscrollRefreshTest() : OverscrollRefreshHandler(nullptr) {}
// OverscrollRefreshHandler implementation.
bool PullStart(float, float) override {
started_ = true;
return true;
}
void PullUpdate(float x_delta, float y_delta) override { delta_ += y_delta; }
void PullRelease(bool allow_refresh) override {
released_ = true;
refresh_allowed_ = allow_refresh;
}
void PullReset() override { reset_ = true; }
bool GetAndResetPullStarted() {
bool result = started_;
started_ = false;
return result;
}
float GetAndResetPullDelta() {
float result = delta_;
delta_ = 0;
return result;
}
bool GetAndResetPullReleased() {
bool result = released_;
released_ = false;
return result;
}
bool GetAndResetRefreshAllowed() {
bool result = refresh_allowed_;
refresh_allowed_ = false;
return result;
}
bool GetAndResetPullReset() {
bool result = reset_;
reset_ = false;
return result;
}
private:
float delta_ = 0;
bool started_ = false;
bool released_ = false;
bool reset_ = false;
bool refresh_allowed_ = false;
};
TEST_F(OverscrollRefreshTest, Basic) {
OverscrollRefresh effect(this);
EXPECT_FALSE(effect.IsActive());
EXPECT_FALSE(effect.IsAwaitingScrollUpdateAck());
effect.OnScrollBegin();
EXPECT_FALSE(effect.IsActive());
EXPECT_TRUE(effect.IsAwaitingScrollUpdateAck());
// The initial scroll should not be consumed, as it should first be offered
// to content.
gfx::Vector2dF scroll_up(0, 10);
EXPECT_FALSE(effect.WillHandleScrollUpdate(scroll_up));
EXPECT_FALSE(effect.IsActive());
EXPECT_TRUE(effect.IsAwaitingScrollUpdateAck());
// The unconsumed, overscrolling scroll will trigger the effect.
effect.OnOverscrolled();
EXPECT_TRUE(effect.IsActive());
EXPECT_FALSE(effect.IsAwaitingScrollUpdateAck());
EXPECT_TRUE(GetAndResetPullStarted());
// Further scrolls will be consumed.
EXPECT_TRUE(effect.WillHandleScrollUpdate(gfx::Vector2dF(0, 50)));
EXPECT_EQ(50.f, GetAndResetPullDelta());
EXPECT_TRUE(effect.IsActive());
// Even scrolls in the down direction should be consumed.
EXPECT_TRUE(effect.WillHandleScrollUpdate(gfx::Vector2dF(0, -50)));
EXPECT_EQ(-50.f, GetAndResetPullDelta());
EXPECT_TRUE(effect.IsActive());
// Ending the scroll while beyond the threshold should trigger a refresh.
gfx::Vector2dF zero_velocity;
EXPECT_FALSE(GetAndResetPullReleased());
effect.OnScrollEnd(zero_velocity);
EXPECT_FALSE(effect.IsActive());
EXPECT_TRUE(GetAndResetPullReleased());
EXPECT_TRUE(GetAndResetRefreshAllowed());
}
TEST_F(OverscrollRefreshTest, NotTriggeredIfInitialYOffsetIsNotZero) {
OverscrollRefresh effect(this);
// A positive y scroll offset at the start of scroll will prevent activation,
// even if the subsequent scroll overscrolls upward.
gfx::Vector2dF nonzero_offset(0, 10);
bool overflow_y_hidden = false;
effect.OnFrameUpdated(nonzero_offset, overflow_y_hidden);
effect.OnScrollBegin();
effect.OnFrameUpdated(gfx::Vector2dF(), overflow_y_hidden);
ASSERT_FALSE(effect.WillHandleScrollUpdate(gfx::Vector2dF(0, 10)));
EXPECT_FALSE(effect.IsActive());
EXPECT_FALSE(effect.IsAwaitingScrollUpdateAck());
effect.OnOverscrolled();
EXPECT_FALSE(effect.IsActive());
EXPECT_FALSE(effect.IsAwaitingScrollUpdateAck());
EXPECT_FALSE(effect.WillHandleScrollUpdate(gfx::Vector2dF(0, 500)));
effect.OnScrollEnd(gfx::Vector2dF());
EXPECT_FALSE(GetAndResetPullStarted());
EXPECT_FALSE(GetAndResetPullReleased());
}
TEST_F(OverscrollRefreshTest, NotTriggeredIfOverflowYHidden) {
OverscrollRefresh effect(this);
// overflow-y:hidden at the start of scroll will prevent activation.
gfx::Vector2dF zero_offset;
bool overflow_y_hidden = true;
effect.OnFrameUpdated(zero_offset, overflow_y_hidden);
effect.OnScrollBegin();
ASSERT_FALSE(effect.WillHandleScrollUpdate(gfx::Vector2dF(0, 10)));
EXPECT_FALSE(effect.IsActive());
EXPECT_FALSE(effect.IsAwaitingScrollUpdateAck());
effect.OnOverscrolled();
EXPECT_FALSE(effect.IsActive());
EXPECT_FALSE(effect.IsAwaitingScrollUpdateAck());
EXPECT_FALSE(effect.WillHandleScrollUpdate(gfx::Vector2dF(0, 500)));
effect.OnScrollEnd(gfx::Vector2dF());
EXPECT_FALSE(GetAndResetPullStarted());
EXPECT_FALSE(GetAndResetPullReleased());
}
TEST_F(OverscrollRefreshTest, NotTriggeredIfInitialScrollDownward) {
OverscrollRefresh effect(this);
effect.OnScrollBegin();
// A downward initial scroll will prevent activation, even if the subsequent
// scroll overscrolls upward.
ASSERT_FALSE(effect.WillHandleScrollUpdate(gfx::Vector2dF(0, -10)));
EXPECT_FALSE(effect.IsActive());
EXPECT_FALSE(effect.IsAwaitingScrollUpdateAck());
effect.OnOverscrolled();
EXPECT_FALSE(effect.IsActive());
EXPECT_FALSE(effect.IsAwaitingScrollUpdateAck());
EXPECT_FALSE(effect.WillHandleScrollUpdate(gfx::Vector2dF(0, 500)));
effect.OnScrollEnd(gfx::Vector2dF());
EXPECT_FALSE(GetAndResetPullReleased());
}
TEST_F(OverscrollRefreshTest, NotTriggeredIfInitialScrollOrTouchConsumed) {
OverscrollRefresh effect(this);
effect.OnScrollBegin();
ASSERT_FALSE(effect.WillHandleScrollUpdate(gfx::Vector2dF(0, 10)));
ASSERT_TRUE(effect.IsAwaitingScrollUpdateAck());
// Consumption of the initial touchmove or scroll should prevent future
// activation.
effect.Reset();
effect.OnOverscrolled();
EXPECT_FALSE(effect.IsActive());
EXPECT_FALSE(effect.IsAwaitingScrollUpdateAck());
EXPECT_FALSE(effect.WillHandleScrollUpdate(gfx::Vector2dF(0, 500)));
effect.OnOverscrolled();
EXPECT_FALSE(effect.IsActive());
EXPECT_FALSE(effect.IsAwaitingScrollUpdateAck());
EXPECT_FALSE(effect.WillHandleScrollUpdate(gfx::Vector2dF(0, 500)));
effect.OnScrollEnd(gfx::Vector2dF());
EXPECT_FALSE(GetAndResetPullStarted());
EXPECT_FALSE(GetAndResetPullReleased());
}
TEST_F(OverscrollRefreshTest, NotTriggeredIfFlungDownward) {
OverscrollRefresh effect(this);
effect.OnScrollBegin();
ASSERT_FALSE(effect.WillHandleScrollUpdate(gfx::Vector2dF(0, 10)));
ASSERT_TRUE(effect.IsAwaitingScrollUpdateAck());
effect.OnOverscrolled();
ASSERT_TRUE(effect.IsActive());
EXPECT_TRUE(GetAndResetPullStarted());
// Terminating the pull with a down-directed fling should prevent triggering.
effect.OnScrollEnd(gfx::Vector2dF(0, -1000));
EXPECT_TRUE(GetAndResetPullReleased());
EXPECT_FALSE(GetAndResetRefreshAllowed());
}
TEST_F(OverscrollRefreshTest, NotTriggeredIfReleasedWithoutActivation) {
OverscrollRefresh effect(this);
effect.OnScrollBegin();
ASSERT_FALSE(effect.WillHandleScrollUpdate(gfx::Vector2dF(0, 10)));
ASSERT_TRUE(effect.IsAwaitingScrollUpdateAck());
effect.OnOverscrolled();
ASSERT_TRUE(effect.IsActive());
EXPECT_TRUE(GetAndResetPullStarted());
// An early release should prevent the refresh action from firing.
effect.ReleaseWithoutActivation();
effect.OnScrollEnd(gfx::Vector2dF());
EXPECT_TRUE(GetAndResetPullReleased());
EXPECT_FALSE(GetAndResetRefreshAllowed());
}
TEST_F(OverscrollRefreshTest, NotTriggeredIfReset) {
OverscrollRefresh effect(this);
effect.OnScrollBegin();
ASSERT_FALSE(effect.WillHandleScrollUpdate(gfx::Vector2dF(0, 10)));
ASSERT_TRUE(effect.IsAwaitingScrollUpdateAck());
effect.OnOverscrolled();
ASSERT_TRUE(effect.IsActive());
EXPECT_TRUE(GetAndResetPullStarted());
// An early reset should prevent the refresh action from firing.
effect.Reset();
EXPECT_TRUE(GetAndResetPullReset());
effect.OnScrollEnd(gfx::Vector2dF());
EXPECT_FALSE(GetAndResetPullReleased());
}
} // namespace ui
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