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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 "ash/test/layer_animation_verifier.h"
#include "third_party/googletest/src/googletest/include/gtest/gtest.h"
#include "ui/compositor/compositor.h"
#include "ui/compositor/layer.h"
#include "ui/compositor/layer_animator.h"
#include "ui/views/view.h"
#include "ui/views/widget/widget.h"
namespace ash {
namespace {
// A threshold set empirically.
constexpr int kMinimumComparisonCount = 8;
// Returns whether `layer` is in animation progress.
bool IsLayerUnderAnimation(ui::Layer* layer) {
return layer->GetAnimator()->is_animating();
}
} // namespace
LayerAnimationVerifier::LayerAnimationVerifier(ui::Layer* layer_with_animation,
views::View* observed_view)
: layer_with_animation_(layer_with_animation),
observed_view_(observed_view) {
DCHECK_EQ(GetCompositor(), observed_view->GetWidget()->GetCompositor());
// Ensure that `LayerAnimationVerifier` observes a layer animation from start
// to end without missing any part. Due to the same reason, the layer
// animation is expected to have completed when `LayerAnimationVerifier` is
// destructed.
EXPECT_FALSE(IsLayerUnderAnimation(layer_with_animation_));
GetCompositor()->AddObserver(this);
}
LayerAnimationVerifier::~LayerAnimationVerifier() {
GetCompositor()->RemoveObserver(this);
EXPECT_FALSE(IsLayerUnderAnimation(layer_with_animation_));
// We need to collect enough data to verify the animation.
EXPECT_GT(comparison_count_, kMinimumComparisonCount);
}
void LayerAnimationVerifier::OnCompositingDidCommit(
ui::Compositor* compositor) {
const gfx::Rect current_screen_bounds = observed_view_->GetBoundsInScreen();
// Compare with `last_screen_bounds_` if any.
if (last_screen_bounds_) {
CompareWithLastBoundsRect(current_screen_bounds);
return;
}
last_screen_bounds_ = current_screen_bounds;
EXPECT_FALSE(x_direction_);
EXPECT_FALSE(y_direction_);
}
void LayerAnimationVerifier::CompareWithLastBoundsRect(
const gfx::Rect& current_screen_bounds) {
++comparison_count_;
if (!x_direction_) {
if (current_screen_bounds.x() != last_screen_bounds_->x()) {
x_direction_ = CalculateMoveDirection(current_screen_bounds.x(),
last_screen_bounds_->x());
}
} else {
EXPECT_EQ(*x_direction_, CalculateMoveDirection(current_screen_bounds.x(),
last_screen_bounds_->x()));
}
if (!y_direction_) {
if (current_screen_bounds.y() != last_screen_bounds_->y()) {
y_direction_ = CalculateMoveDirection(current_screen_bounds.y(),
last_screen_bounds_->y());
}
} else {
EXPECT_EQ(*y_direction_, CalculateMoveDirection(current_screen_bounds.y(),
last_screen_bounds_->y()));
}
}
LayerAnimationVerifier::MoveDirection
LayerAnimationVerifier::CalculateMoveDirection(int current_data,
int last_data) const {
if (current_data >= last_data)
return MoveDirection::kForward;
return MoveDirection::kBackward;
}
ui::Compositor* LayerAnimationVerifier::GetCompositor() {
return layer_with_animation_->GetCompositor();
}
} // namespace ash
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