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// Copyright 2021 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ui/native_theme/scrollbar_animator_mac.h"
#include "base/logging.h"
#include "base/test/task_environment.h"
#include "base/time/time.h"
#include "testing/gmock/include/gmock/gmock.h"
#include "testing/gtest/include/gtest/gtest.h"
using testing::Return;
namespace ui {
namespace {
constexpr int kExpandedWidth = 32;
constexpr int kUnexpandedWidth = 16;
constexpr auto kTimeToFadeOut = base::Milliseconds(500);
constexpr auto kAnimationTime = base::Milliseconds(250);
class MockClient : public OverlayScrollbarAnimatorMac::Client {
public:
MOCK_CONST_METHOD0(IsMouseInScrollbarFrameRect, bool());
MOCK_METHOD1(SetHidden, void(bool));
MOCK_METHOD0(SetThumbNeedsDisplay, void());
MOCK_METHOD0(SetTrackNeedsDisplay, void());
};
class MacScrollbarAnimatorTest : public ::testing::Test {
public:
MacScrollbarAnimatorTest()
: task_environment_(base::test::TaskEnvironment::TimeSource::MOCK_TIME) {
scrollbar_ = std::make_unique<OverlayScrollbarAnimatorMac>(
&client_, kExpandedWidth, kUnexpandedWidth,
task_environment_.GetMainThreadTaskRunner());
}
~MacScrollbarAnimatorTest() override = default;
base::test::TaskEnvironment task_environment_;
MockClient client_;
std::unique_ptr<OverlayScrollbarAnimatorMac> scrollbar_;
};
TEST_F(MacScrollbarAnimatorTest, DidScrollThenFadeOut) {
// The scrollbar_ starts as invisible.
EXPECT_EQ(scrollbar_->GetThumbAlpha(), 0.f);
EXPECT_EQ(scrollbar_->GetTrackAlpha(), 0.f);
// Scroll with the mouse not in the track.
EXPECT_CALL(client_, IsMouseInScrollbarFrameRect()).WillOnce(Return(false));
EXPECT_CALL(client_, SetHidden(false));
EXPECT_CALL(client_, SetThumbNeedsDisplay());
scrollbar_->DidScroll();
EXPECT_EQ(scrollbar_->GetThumbAlpha(), 1.f);
EXPECT_EQ(scrollbar_->GetTrackAlpha(), 0.f);
EXPECT_EQ(scrollbar_->GetThumbWidth(), kUnexpandedWidth);
// Fast-forward until just before the timeout threshold is hit.
EXPECT_CALL(client_, SetThumbNeedsDisplay()).Times(0);
task_environment_.FastForwardBy(kTimeToFadeOut);
EXPECT_EQ(scrollbar_->GetThumbAlpha(), 1.f);
EXPECT_EQ(scrollbar_->GetTrackAlpha(), 0.f);
// Fast-forward through half of the fade-out animation.
EXPECT_CALL(client_, SetThumbNeedsDisplay()).WillRepeatedly(Return());
task_environment_.FastForwardBy(kAnimationTime / 2);
EXPECT_GT(scrollbar_->GetThumbAlpha(), 0.f);
EXPECT_LT(scrollbar_->GetThumbAlpha(), 1.f);
EXPECT_EQ(scrollbar_->GetThumbWidth(), kUnexpandedWidth);
// Fast-forward through past the end of the fade-out animation. The scrollbar_
// should be hidden.
EXPECT_CALL(client_, SetHidden(true));
task_environment_.FastForwardBy(kAnimationTime);
EXPECT_EQ(scrollbar_->GetThumbAlpha(), 0.f);
EXPECT_EQ(scrollbar_->GetTrackAlpha(), 0.f);
}
TEST_F(MacScrollbarAnimatorTest, DidScrollStartsInTrack) {
// Scroll with the mouse in the track.
EXPECT_CALL(client_, IsMouseInScrollbarFrameRect()).WillOnce(Return(true));
EXPECT_CALL(client_, SetHidden(false));
EXPECT_CALL(client_, SetThumbNeedsDisplay());
EXPECT_CALL(client_, SetTrackNeedsDisplay());
scrollbar_->DidScroll();
EXPECT_EQ(scrollbar_->GetThumbAlpha(), 1.f);
EXPECT_EQ(scrollbar_->GetTrackAlpha(), 1.f);
EXPECT_EQ(scrollbar_->GetThumbWidth(), kExpandedWidth);
// Fast-forward long past the fade-out animation would happen. Nothing should
// happen.
EXPECT_CALL(client_, SetThumbNeedsDisplay()).Times(0);
EXPECT_CALL(client_, SetTrackNeedsDisplay()).Times(0);
task_environment_.FastForwardBy(10 * kTimeToFadeOut);
EXPECT_EQ(scrollbar_->GetThumbAlpha(), 1.f);
EXPECT_EQ(scrollbar_->GetTrackAlpha(), 1.f);
EXPECT_EQ(scrollbar_->GetThumbWidth(), kExpandedWidth);
// Scroll again. Again, nothing should happen.
scrollbar_->DidScroll();
EXPECT_EQ(scrollbar_->GetThumbAlpha(), 1.f);
EXPECT_EQ(scrollbar_->GetTrackAlpha(), 1.f);
EXPECT_EQ(scrollbar_->GetThumbWidth(), kExpandedWidth);
// Have the mouse leave the scrollbar_. Fast-forward not enough time for the
// scrollbar_ to fade out, then have the mouse re-enter. Exit again. Still
// nothing should happen.
scrollbar_->MouseDidExit();
task_environment_.FastForwardBy(kTimeToFadeOut / 2);
scrollbar_->MouseDidEnter();
EXPECT_EQ(scrollbar_->GetThumbAlpha(), 1.f);
EXPECT_EQ(scrollbar_->GetTrackAlpha(), 1.f);
EXPECT_EQ(scrollbar_->GetThumbWidth(), kExpandedWidth);
scrollbar_->MouseDidExit();
EXPECT_EQ(scrollbar_->GetThumbAlpha(), 1.f);
EXPECT_EQ(scrollbar_->GetTrackAlpha(), 1.f);
EXPECT_EQ(scrollbar_->GetThumbWidth(), kExpandedWidth);
// Wait most of the fade-out timer's time. Nothing should happen in this
// interval.
task_environment_.FastForwardBy(3 * kTimeToFadeOut / 4);
EXPECT_EQ(scrollbar_->GetThumbAlpha(), 1.f);
EXPECT_EQ(scrollbar_->GetTrackAlpha(), 1.f);
EXPECT_EQ(scrollbar_->GetThumbWidth(), kExpandedWidth);
// Allow the fade-out animation to progress about halfway through.
EXPECT_CALL(client_, SetThumbNeedsDisplay()).WillRepeatedly(Return());
EXPECT_CALL(client_, SetTrackNeedsDisplay()).WillRepeatedly(Return());
task_environment_.FastForwardBy(kTimeToFadeOut / 4 + kAnimationTime / 2);
EXPECT_GT(scrollbar_->GetThumbAlpha(), 0.f);
EXPECT_LT(scrollbar_->GetThumbAlpha(), 1.f);
EXPECT_GT(scrollbar_->GetTrackAlpha(), 0.f);
EXPECT_LT(scrollbar_->GetTrackAlpha(), 1.f);
EXPECT_EQ(scrollbar_->GetThumbWidth(), kExpandedWidth);
// Scroll, interrupting the fade-out animation.
EXPECT_CALL(client_, SetThumbNeedsDisplay()).Times(1);
EXPECT_CALL(client_, SetTrackNeedsDisplay()).Times(1);
scrollbar_->DidScroll();
EXPECT_EQ(scrollbar_->GetThumbAlpha(), 1.f);
EXPECT_EQ(scrollbar_->GetTrackAlpha(), 1.f);
EXPECT_EQ(scrollbar_->GetThumbWidth(), kExpandedWidth);
// Wait most of the fade-out timer's time. Nothing should happen in this time.
EXPECT_CALL(client_, SetThumbNeedsDisplay()).Times(0);
EXPECT_CALL(client_, SetTrackNeedsDisplay()).Times(0);
task_environment_.FastForwardBy(3 * kTimeToFadeOut / 4);
// Allow the fade-out animation to progress halfway again.
EXPECT_CALL(client_, SetThumbNeedsDisplay()).WillRepeatedly(Return());
EXPECT_CALL(client_, SetTrackNeedsDisplay()).WillRepeatedly(Return());
task_environment_.FastForwardBy(kTimeToFadeOut / 4 + kAnimationTime / 2);
EXPECT_GT(scrollbar_->GetThumbAlpha(), 0.f);
EXPECT_LT(scrollbar_->GetThumbAlpha(), 1.f);
EXPECT_GT(scrollbar_->GetTrackAlpha(), 0.f);
EXPECT_LT(scrollbar_->GetTrackAlpha(), 1.f);
EXPECT_EQ(scrollbar_->GetThumbWidth(), kExpandedWidth);
// And let it progress to completion. The scrollbar_ should hide itself.
EXPECT_CALL(client_, SetHidden(true));
task_environment_.FastForwardBy(kAnimationTime);
EXPECT_EQ(scrollbar_->GetThumbAlpha(), 0.f);
EXPECT_EQ(scrollbar_->GetTrackAlpha(), 0.f);
EXPECT_EQ(scrollbar_->GetThumbWidth(), kUnexpandedWidth);
}
TEST_F(MacScrollbarAnimatorTest, EnterTrack) {
// First try to enter the track before showing the scrollbar_. Nothing should
// happen.
EXPECT_EQ(scrollbar_->GetThumbAlpha(), 0.f);
EXPECT_EQ(scrollbar_->GetTrackAlpha(), 0.f);
scrollbar_->MouseDidEnter();
EXPECT_EQ(scrollbar_->GetThumbAlpha(), 0.f);
EXPECT_EQ(scrollbar_->GetTrackAlpha(), 0.f);
// Scroll with the mouse in the track.
EXPECT_CALL(client_, IsMouseInScrollbarFrameRect()).WillOnce(Return(false));
EXPECT_CALL(client_, SetHidden(false));
EXPECT_CALL(client_, SetThumbNeedsDisplay());
scrollbar_->DidScroll();
EXPECT_EQ(scrollbar_->GetThumbAlpha(), 1.f);
EXPECT_EQ(scrollbar_->GetTrackAlpha(), 0.f);
EXPECT_EQ(scrollbar_->GetThumbWidth(), kUnexpandedWidth);
// Have the mouse enter the scrollbar_ area.
scrollbar_->MouseDidEnter();
EXPECT_EQ(scrollbar_->GetThumbAlpha(), 1.f);
EXPECT_EQ(scrollbar_->GetTrackAlpha(), 0.f);
EXPECT_EQ(scrollbar_->GetThumbWidth(), kUnexpandedWidth);
// Fast-forward part of the animation.
EXPECT_CALL(client_, SetThumbNeedsDisplay()).WillRepeatedly(Return());
EXPECT_CALL(client_, SetTrackNeedsDisplay()).WillRepeatedly(Return());
task_environment_.FastForwardBy(kAnimationTime / 2);
EXPECT_EQ(scrollbar_->GetThumbAlpha(), 1.f);
EXPECT_GT(scrollbar_->GetTrackAlpha(), 0.f);
EXPECT_LT(scrollbar_->GetTrackAlpha(), 1.f);
EXPECT_GT(scrollbar_->GetThumbWidth(), kUnexpandedWidth);
EXPECT_LT(scrollbar_->GetThumbWidth(), kExpandedWidth);
// Fast-forward through the rest of the animation.
task_environment_.FastForwardBy(kAnimationTime);
EXPECT_EQ(scrollbar_->GetThumbAlpha(), 1.f);
EXPECT_EQ(scrollbar_->GetTrackAlpha(), 1.f);
EXPECT_EQ(scrollbar_->GetThumbWidth(), kExpandedWidth);
// Fast-forward for a long time. Nothing should happen (no fade-out).
EXPECT_CALL(client_, SetThumbNeedsDisplay()).Times(0);
EXPECT_CALL(client_, SetTrackNeedsDisplay()).Times(0);
task_environment_.FastForwardBy(10 * kTimeToFadeOut);
EXPECT_EQ(scrollbar_->GetThumbAlpha(), 1.f);
EXPECT_EQ(scrollbar_->GetTrackAlpha(), 1.f);
EXPECT_EQ(scrollbar_->GetThumbWidth(), kExpandedWidth);
// Move the mouse out and wait for the the fade-out should start.
scrollbar_->MouseDidExit();
task_environment_.FastForwardBy(kTimeToFadeOut);
EXPECT_CALL(client_, SetThumbNeedsDisplay()).WillRepeatedly(Return());
EXPECT_CALL(client_, SetTrackNeedsDisplay()).WillRepeatedly(Return());
task_environment_.FastForwardBy(kAnimationTime / 2);
EXPECT_GT(scrollbar_->GetThumbAlpha(), 0.f);
EXPECT_LT(scrollbar_->GetThumbAlpha(), 1.f);
EXPECT_GT(scrollbar_->GetTrackAlpha(), 0.f);
EXPECT_LT(scrollbar_->GetTrackAlpha(), 1.f);
EXPECT_EQ(scrollbar_->GetThumbWidth(), kExpandedWidth);
// Re-enter. This will immediately return us to full opacity.
EXPECT_CALL(client_, SetThumbNeedsDisplay()).Times(1);
EXPECT_CALL(client_, SetTrackNeedsDisplay()).Times(1);
scrollbar_->MouseDidEnter();
EXPECT_EQ(scrollbar_->GetThumbAlpha(), 1.f);
EXPECT_EQ(scrollbar_->GetTrackAlpha(), 1.f);
EXPECT_EQ(scrollbar_->GetThumbWidth(), kExpandedWidth);
// Wait for a long time. Nothing should happen.
EXPECT_CALL(client_, SetThumbNeedsDisplay()).Times(0);
EXPECT_CALL(client_, SetTrackNeedsDisplay()).Times(0);
task_environment_.FastForwardBy(10 * kTimeToFadeOut);
EXPECT_EQ(scrollbar_->GetThumbAlpha(), 1.f);
EXPECT_EQ(scrollbar_->GetTrackAlpha(), 1.f);
EXPECT_EQ(scrollbar_->GetThumbWidth(), kExpandedWidth);
// Re-leave the track. Again nothing should happen.
scrollbar_->MouseDidExit();
// Fast-forward through the start of the fade-out.
task_environment_.FastForwardBy(kTimeToFadeOut);
EXPECT_CALL(client_, SetThumbNeedsDisplay()).WillRepeatedly(Return());
EXPECT_CALL(client_, SetTrackNeedsDisplay()).WillRepeatedly(Return());
task_environment_.FastForwardBy(kAnimationTime / 2);
EXPECT_GT(scrollbar_->GetThumbAlpha(), 0.f);
EXPECT_LT(scrollbar_->GetThumbAlpha(), 1.f);
EXPECT_GT(scrollbar_->GetTrackAlpha(), 0.f);
EXPECT_LT(scrollbar_->GetTrackAlpha(), 1.f);
EXPECT_EQ(scrollbar_->GetThumbWidth(), kExpandedWidth);
// Fast-forward until the fade-out completes.
EXPECT_CALL(client_, SetHidden(true));
task_environment_.FastForwardBy(kAnimationTime);
EXPECT_EQ(scrollbar_->GetThumbAlpha(), 0.f);
EXPECT_EQ(scrollbar_->GetTrackAlpha(), 0.f);
EXPECT_EQ(scrollbar_->GetThumbWidth(), kUnexpandedWidth);
}
} // namespace
} // namespace ui
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