blob: ff0234d41cad58fa76f77b78721f3d1128ac5706 [file] [log] [blame]
// Copyright 2013 The Flutter 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 "flutter/display_list/display_list.h"
#include "flutter/display_list/display_list_builder.h"
#include "flutter/display_list/display_list_test_utils.h"
#include "flutter/flow/raster_cache.h"
#include "flutter/flow/testing/mock_raster_cache.h"
#include "gtest/gtest.h"
#include "third_party/skia/include/core/SkCanvas.h"
#include "third_party/skia/include/core/SkPaint.h"
#include "third_party/skia/include/core/SkPicture.h"
#include "third_party/skia/include/core/SkPictureRecorder.h"
namespace flutter {
namespace testing {
TEST(RasterCache, SimpleInitialization) {
flutter::RasterCache cache;
ASSERT_TRUE(true);
}
TEST(RasterCache, ThresholdIsRespectedForSkPicture) {
size_t threshold = 2;
flutter::RasterCache cache(threshold);
SkMatrix matrix = SkMatrix::I();
auto picture = GetSamplePicture();
SkCanvas dummy_canvas;
PrerollContextHolder preroll_context_holder = GetSamplePrerollContextHolder();
cache.PrepareNewFrame();
ASSERT_FALSE(cache.Prepare(&preroll_context_holder.preroll_context,
picture.get(), true, false, matrix));
// 1st access.
ASSERT_FALSE(cache.Draw(*picture, dummy_canvas));
cache.CleanupAfterFrame();
cache.PrepareNewFrame();
ASSERT_FALSE(cache.Prepare(&preroll_context_holder.preroll_context,
picture.get(), true, false, matrix));
// 2nd access.
ASSERT_FALSE(cache.Draw(*picture, dummy_canvas));
cache.CleanupAfterFrame();
cache.PrepareNewFrame();
// Now Prepare should cache it.
ASSERT_TRUE(cache.Prepare(&preroll_context_holder.preroll_context,
picture.get(), true, false, matrix));
ASSERT_TRUE(cache.Draw(*picture, dummy_canvas));
}
TEST(RasterCache, MetricsOmitUnpopulatedEntries) {
size_t threshold = 2;
flutter::RasterCache cache(threshold);
SkMatrix matrix = SkMatrix::I();
auto picture = GetSamplePicture();
SkCanvas dummy_canvas;
PrerollContextHolder preroll_context_holder = GetSamplePrerollContextHolder();
cache.PrepareNewFrame();
ASSERT_FALSE(cache.Prepare(&preroll_context_holder.preroll_context,
picture.get(), true, false, matrix));
// 1st access.
ASSERT_FALSE(cache.Draw(*picture, dummy_canvas));
cache.CleanupAfterFrame();
ASSERT_EQ(cache.picture_metrics().total_count(), 0u);
ASSERT_EQ(cache.picture_metrics().total_bytes(), 0u);
cache.PrepareNewFrame();
ASSERT_FALSE(cache.Prepare(&preroll_context_holder.preroll_context,
picture.get(), true, false, matrix));
// 2nd access.
ASSERT_FALSE(cache.Draw(*picture, dummy_canvas));
cache.CleanupAfterFrame();
ASSERT_EQ(cache.picture_metrics().total_count(), 0u);
ASSERT_EQ(cache.picture_metrics().total_bytes(), 0u);
cache.PrepareNewFrame();
// Now Prepare should cache it.
ASSERT_TRUE(cache.Prepare(&preroll_context_holder.preroll_context,
picture.get(), true, false, matrix));
ASSERT_TRUE(cache.Draw(*picture, dummy_canvas));
cache.CleanupAfterFrame();
ASSERT_EQ(cache.picture_metrics().total_count(), 1u);
// 150w * 100h * 4bpp
ASSERT_EQ(cache.picture_metrics().total_bytes(), 60000u);
}
TEST(RasterCache, ThresholdIsRespectedForDisplayList) {
size_t threshold = 2;
flutter::RasterCache cache(threshold);
SkMatrix matrix = SkMatrix::I();
auto display_list = GetSampleDisplayList();
SkCanvas dummy_canvas;
PrerollContextHolder preroll_context_holder = GetSamplePrerollContextHolder();
cache.PrepareNewFrame();
ASSERT_FALSE(cache.Prepare(&preroll_context_holder.preroll_context,
display_list.get(), true, false, matrix));
// 1st access.
ASSERT_FALSE(cache.Draw(*display_list, dummy_canvas));
cache.CleanupAfterFrame();
cache.PrepareNewFrame();
ASSERT_FALSE(cache.Prepare(&preroll_context_holder.preroll_context,
display_list.get(), true, false, matrix));
// 2nd access.
ASSERT_FALSE(cache.Draw(*display_list, dummy_canvas));
cache.CleanupAfterFrame();
cache.PrepareNewFrame();
// Now Prepare should cache it.
ASSERT_TRUE(cache.Prepare(&preroll_context_holder.preroll_context,
display_list.get(), true, false, matrix));
ASSERT_TRUE(cache.Draw(*display_list, dummy_canvas));
}
TEST(RasterCache, AccessThresholdOfZeroDisablesCachingForSkPicture) {
size_t threshold = 0;
flutter::RasterCache cache(threshold);
SkMatrix matrix = SkMatrix::I();
auto picture = GetSamplePicture();
SkCanvas dummy_canvas;
PrerollContextHolder preroll_context_holder = GetSamplePrerollContextHolder();
cache.PrepareNewFrame();
ASSERT_FALSE(cache.Prepare(&preroll_context_holder.preroll_context,
picture.get(), true, false, matrix));
ASSERT_FALSE(cache.Draw(*picture, dummy_canvas));
}
TEST(RasterCache, AccessThresholdOfZeroDisablesCachingForDisplayList) {
size_t threshold = 0;
flutter::RasterCache cache(threshold);
SkMatrix matrix = SkMatrix::I();
auto display_list = GetSampleDisplayList();
SkCanvas dummy_canvas;
PrerollContextHolder preroll_context_holder = GetSamplePrerollContextHolder();
cache.PrepareNewFrame();
ASSERT_FALSE(cache.Prepare(&preroll_context_holder.preroll_context,
display_list.get(), true, false, matrix));
ASSERT_FALSE(cache.Draw(*display_list, dummy_canvas));
}
TEST(RasterCache, PictureCacheLimitPerFrameIsRespectedWhenZeroForSkPicture) {
size_t picture_cache_limit_per_frame = 0;
flutter::RasterCache cache(3, picture_cache_limit_per_frame);
SkMatrix matrix = SkMatrix::I();
auto picture = GetSamplePicture();
SkCanvas dummy_canvas;
PrerollContextHolder preroll_context_holder = GetSamplePrerollContextHolder();
cache.PrepareNewFrame();
ASSERT_FALSE(cache.Prepare(&preroll_context_holder.preroll_context,
picture.get(), true, false, matrix));
ASSERT_FALSE(cache.Draw(*picture, dummy_canvas));
}
TEST(RasterCache, PictureCacheLimitPerFrameIsRespectedWhenZeroForDisplayList) {
size_t picture_cache_limit_per_frame = 0;
flutter::RasterCache cache(3, picture_cache_limit_per_frame);
SkMatrix matrix = SkMatrix::I();
auto display_list = GetSampleDisplayList();
SkCanvas dummy_canvas;
PrerollContextHolder preroll_context_holder = GetSamplePrerollContextHolder();
cache.PrepareNewFrame();
ASSERT_FALSE(cache.Prepare(&preroll_context_holder.preroll_context,
display_list.get(), true, false, matrix));
ASSERT_FALSE(cache.Draw(*display_list, dummy_canvas));
}
TEST(RasterCache, SweepsRemoveUnusedSkPictures) {
size_t threshold = 1;
flutter::RasterCache cache(threshold);
SkMatrix matrix = SkMatrix::I();
auto picture = GetSamplePicture();
SkCanvas dummy_canvas;
PrerollContextHolder preroll_context_holder = GetSamplePrerollContextHolder();
cache.PrepareNewFrame();
ASSERT_FALSE(cache.Prepare(&preroll_context_holder.preroll_context,
picture.get(), true, false, matrix)); // 1
ASSERT_FALSE(cache.Draw(*picture, dummy_canvas));
cache.CleanupAfterFrame();
cache.PrepareNewFrame();
ASSERT_TRUE(cache.Prepare(&preroll_context_holder.preroll_context,
picture.get(), true, false, matrix)); // 2
ASSERT_TRUE(cache.Draw(*picture, dummy_canvas));
cache.CleanupAfterFrame();
cache.PrepareNewFrame();
cache.CleanupAfterFrame(); // Extra frame without a Get image access.
cache.PrepareNewFrame();
ASSERT_FALSE(cache.Draw(*picture, dummy_canvas));
}
TEST(RasterCache, SweepsRemoveUnusedDisplayLists) {
size_t threshold = 1;
flutter::RasterCache cache(threshold);
SkMatrix matrix = SkMatrix::I();
auto display_list = GetSampleDisplayList();
SkCanvas dummy_canvas;
PrerollContextHolder preroll_context_holder = GetSamplePrerollContextHolder();
cache.PrepareNewFrame();
ASSERT_FALSE(cache.Prepare(&preroll_context_holder.preroll_context,
display_list.get(), true, false, matrix)); // 1
ASSERT_FALSE(cache.Draw(*display_list, dummy_canvas));
cache.CleanupAfterFrame();
cache.PrepareNewFrame();
ASSERT_TRUE(cache.Prepare(&preroll_context_holder.preroll_context,
display_list.get(), true, false, matrix)); // 2
ASSERT_TRUE(cache.Draw(*display_list, dummy_canvas));
cache.CleanupAfterFrame();
cache.PrepareNewFrame();
cache.CleanupAfterFrame(); // Extra frame without a Get image access.
cache.PrepareNewFrame();
ASSERT_FALSE(cache.Draw(*display_list, dummy_canvas));
}
// Construct a cache result whose device target rectangle rounds out to be one
// pixel wider than the cached image. Verify that it can be drawn without
// triggering any assertions.
TEST(RasterCache, DeviceRectRoundOutForSkPicture) {
size_t threshold = 1;
flutter::RasterCache cache(threshold);
SkPictureRecorder recorder;
SkRect logical_rect = SkRect::MakeLTRB(28, 0, 354.56731, 310.288);
recorder.beginRecording(logical_rect);
SkPaint paint;
paint.setColor(SK_ColorRED);
recorder.getRecordingCanvas()->drawRect(logical_rect, paint);
sk_sp<SkPicture> picture = recorder.finishRecordingAsPicture();
SkMatrix ctm = SkMatrix::MakeAll(1.3312, 0, 233, 0, 1.3312, 206, 0, 0, 1);
SkCanvas canvas(100, 100, nullptr);
canvas.setMatrix(ctm);
PrerollContextHolder preroll_context_holder = GetSamplePrerollContextHolder();
cache.PrepareNewFrame();
ASSERT_FALSE(cache.Prepare(&preroll_context_holder.preroll_context,
picture.get(), true, false, ctm));
ASSERT_FALSE(cache.Draw(*picture, canvas));
cache.CleanupAfterFrame();
cache.PrepareNewFrame();
ASSERT_TRUE(cache.Prepare(&preroll_context_holder.preroll_context,
picture.get(), true, false, ctm));
ASSERT_TRUE(cache.Draw(*picture, canvas));
canvas.translate(248, 0);
ASSERT_TRUE(cache.Draw(*picture, canvas));
}
// Construct a cache result whose device target rectangle rounds out to be one
// pixel wider than the cached image. Verify that it can be drawn without
// triggering any assertions.
TEST(RasterCache, DeviceRectRoundOutForDisplayList) {
size_t threshold = 1;
flutter::RasterCache cache(threshold);
SkRect logical_rect = SkRect::MakeLTRB(28, 0, 354.56731, 310.288);
DisplayListBuilder builder(logical_rect);
builder.setColor(SK_ColorRED);
builder.drawRect(logical_rect);
sk_sp<DisplayList> display_list = builder.Build();
SkMatrix ctm = SkMatrix::MakeAll(1.3312, 0, 233, 0, 1.3312, 206, 0, 0, 1);
SkCanvas canvas(100, 100, nullptr);
canvas.setMatrix(ctm);
PrerollContextHolder preroll_context_holder = GetSamplePrerollContextHolder();
cache.PrepareNewFrame();
ASSERT_FALSE(cache.Prepare(&preroll_context_holder.preroll_context,
display_list.get(), true, false, ctm));
ASSERT_FALSE(cache.Draw(*display_list, canvas));
cache.CleanupAfterFrame();
cache.PrepareNewFrame();
ASSERT_TRUE(cache.Prepare(&preroll_context_holder.preroll_context,
display_list.get(), true, false, ctm));
ASSERT_TRUE(cache.Draw(*display_list, canvas));
canvas.translate(248, 0);
ASSERT_TRUE(cache.Draw(*display_list, canvas));
}
TEST(RasterCache, NestedOpCountMetricUsedForSkPicture) {
size_t threshold = 1;
flutter::RasterCache cache(threshold);
SkMatrix matrix = SkMatrix::I();
auto picture = GetSampleNestedPicture();
ASSERT_EQ(picture->approximateOpCount(), 1);
ASSERT_EQ(picture->approximateOpCount(true), 36);
SkCanvas dummy_canvas;
PrerollContextHolder preroll_context_holder = GetSamplePrerollContextHolder();
cache.PrepareNewFrame();
ASSERT_FALSE(cache.Prepare(&preroll_context_holder.preroll_context,
picture.get(), false, false, matrix));
ASSERT_FALSE(cache.Draw(*picture, dummy_canvas));
cache.CleanupAfterFrame();
cache.PrepareNewFrame();
ASSERT_TRUE(cache.Prepare(&preroll_context_holder.preroll_context,
picture.get(), false, false, matrix));
ASSERT_TRUE(cache.Draw(*picture, dummy_canvas));
}
TEST(RasterCache, NestedOpCountMetricUsedForDisplayList) {
size_t threshold = 1;
flutter::RasterCache cache(threshold);
SkMatrix matrix = SkMatrix::I();
auto display_list = GetSampleNestedDisplayList();
ASSERT_EQ(display_list->op_count(), 1u);
ASSERT_EQ(display_list->op_count(true), 36u);
SkCanvas dummy_canvas;
PrerollContextHolder preroll_context_holder = GetSamplePrerollContextHolder();
cache.PrepareNewFrame();
ASSERT_FALSE(cache.Prepare(&preroll_context_holder.preroll_context,
display_list.get(), false, false, matrix));
ASSERT_FALSE(cache.Draw(*display_list, dummy_canvas));
cache.CleanupAfterFrame();
cache.PrepareNewFrame();
ASSERT_TRUE(cache.Prepare(&preroll_context_holder.preroll_context,
display_list.get(), false, false, matrix));
ASSERT_TRUE(cache.Draw(*display_list, dummy_canvas));
}
TEST(RasterCache, NaiveComplexityScoringDisplayList) {
DisplayListComplexityCalculator* calculator =
DisplayListNaiveComplexityCalculator::GetInstance();
size_t threshold = 1;
flutter::RasterCache cache(threshold);
SkMatrix matrix = SkMatrix::I();
// Five raster ops will not be cached
auto display_list = GetSampleDisplayList(5);
unsigned int complexity_score = calculator->Compute(display_list.get());
ASSERT_EQ(complexity_score, 5u);
ASSERT_EQ(display_list->op_count(), 5u);
ASSERT_FALSE(calculator->ShouldBeCached(complexity_score));
SkCanvas dummy_canvas;
PrerollContextHolder preroll_context_holder = GetSamplePrerollContextHolder();
cache.PrepareNewFrame();
ASSERT_FALSE(cache.Prepare(&preroll_context_holder.preroll_context,
display_list.get(), false, false, matrix));
ASSERT_FALSE(cache.Draw(*display_list, dummy_canvas));
cache.CleanupAfterFrame();
cache.PrepareNewFrame();
ASSERT_FALSE(cache.Prepare(&preroll_context_holder.preroll_context,
display_list.get(), false, false, matrix));
ASSERT_FALSE(cache.Draw(*display_list, dummy_canvas));
// Six raster ops should be cached
display_list = GetSampleDisplayList(6);
complexity_score = calculator->Compute(display_list.get());
ASSERT_EQ(complexity_score, 6u);
ASSERT_EQ(display_list->op_count(), 6u);
ASSERT_TRUE(calculator->ShouldBeCached(complexity_score));
cache.PrepareNewFrame();
ASSERT_FALSE(cache.Prepare(&preroll_context_holder.preroll_context,
display_list.get(), false, false, matrix));
ASSERT_FALSE(cache.Draw(*display_list, dummy_canvas));
cache.CleanupAfterFrame();
cache.PrepareNewFrame();
ASSERT_TRUE(cache.Prepare(&preroll_context_holder.preroll_context,
display_list.get(), false, false, matrix));
ASSERT_TRUE(cache.Draw(*display_list, dummy_canvas));
}
TEST(RasterCache, SkPictureWithSingularMatrixIsNotCached) {
size_t threshold = 2;
flutter::RasterCache cache(threshold);
SkMatrix matrices[] = {
SkMatrix::Scale(0, 1),
SkMatrix::Scale(1, 0),
SkMatrix::Skew(1, 1),
};
int matrixCount = sizeof(matrices) / sizeof(matrices[0]);
auto picture = GetSamplePicture();
SkCanvas dummy_canvas;
PrerollContextHolder preroll_context_holder = GetSamplePrerollContextHolder();
for (int i = 0; i < 10; i++) {
cache.PrepareNewFrame();
for (int j = 0; j < matrixCount; j++) {
ASSERT_FALSE(cache.Prepare(&preroll_context_holder.preroll_context,
picture.get(), true, false, matrices[j]));
}
for (int j = 0; j < matrixCount; j++) {
dummy_canvas.setMatrix(matrices[j]);
ASSERT_FALSE(cache.Draw(*picture, dummy_canvas));
}
cache.CleanupAfterFrame();
}
}
TEST(RasterCache, DisplayListWithSingularMatrixIsNotCached) {
size_t threshold = 2;
flutter::RasterCache cache(threshold);
SkMatrix matrices[] = {
SkMatrix::Scale(0, 1),
SkMatrix::Scale(1, 0),
SkMatrix::Skew(1, 1),
};
int matrixCount = sizeof(matrices) / sizeof(matrices[0]);
auto display_list = GetSampleDisplayList();
SkCanvas dummy_canvas;
PrerollContextHolder preroll_context_holder = GetSamplePrerollContextHolder();
for (int i = 0; i < 10; i++) {
cache.PrepareNewFrame();
for (int j = 0; j < matrixCount; j++) {
ASSERT_FALSE(cache.Prepare(&preroll_context_holder.preroll_context,
display_list.get(), true, false, matrices[j]));
}
for (int j = 0; j < matrixCount; j++) {
dummy_canvas.setMatrix(matrices[j]);
ASSERT_FALSE(cache.Draw(*display_list, dummy_canvas));
}
cache.CleanupAfterFrame();
}
}
TEST(RasterCache, RasterCacheKeyHashFunction) {
RasterCacheKey::Map<int> map;
auto hash_function = map.hash_function();
SkMatrix matrix = SkMatrix::I();
uint64_t id = 5;
RasterCacheKey layer_key(id, RasterCacheKeyType::kLayer, matrix);
RasterCacheKey picture_key(id, RasterCacheKeyType::kPicture, matrix);
RasterCacheKey display_list_key(id, RasterCacheKeyType::kDisplayList, matrix);
RasterCacheKey layer_children_key(id, RasterCacheKeyType::kLayerChildren,
matrix);
auto raster_cache_key_id = RasterCacheKeyID({id});
auto layer_hash_code = hash_function(layer_key);
ASSERT_EQ(layer_hash_code, fml::HashCombine(raster_cache_key_id.GetHash(),
RasterCacheKeyType::kLayer));
auto picture_hash_code = hash_function(picture_key);
ASSERT_EQ(picture_hash_code, fml::HashCombine(raster_cache_key_id.GetHash(),
RasterCacheKeyType::kPicture));
auto display_list_hash_code = hash_function(display_list_key);
ASSERT_EQ(display_list_hash_code,
fml::HashCombine(raster_cache_key_id.GetHash(),
RasterCacheKeyType::kDisplayList));
auto layer_children_hash_code = hash_function(layer_children_key);
ASSERT_EQ(layer_children_hash_code,
fml::HashCombine(raster_cache_key_id.GetHash(),
RasterCacheKeyType::kLayerChildren));
}
TEST(RasterCache, RasterCacheKeySameID) {
RasterCacheKey::Map<int> map;
SkMatrix matrix = SkMatrix::I();
uint64_t id = 5;
RasterCacheKey layer_key(id, RasterCacheKeyType::kLayer, matrix);
RasterCacheKey picture_key(id, RasterCacheKeyType::kPicture, matrix);
RasterCacheKey display_list_key(id, RasterCacheKeyType::kDisplayList, matrix);
RasterCacheKey layer_children_key(id, RasterCacheKeyType::kLayerChildren,
matrix);
map[layer_key] = 100;
map[picture_key] = 200;
map[display_list_key] = 300;
map[layer_children_key] = 400;
ASSERT_EQ(map[layer_key], 100);
ASSERT_EQ(map[picture_key], 200);
ASSERT_EQ(map[display_list_key], 300);
ASSERT_EQ(map[layer_children_key], 400);
}
TEST(RasterCache, RasterCacheKeySameType) {
RasterCacheKey::Map<int> map;
SkMatrix matrix = SkMatrix::I();
RasterCacheKeyType type = RasterCacheKeyType::kLayer;
RasterCacheKey layer_first_key(5, type, matrix);
RasterCacheKey layer_second_key(10, type, matrix);
RasterCacheKey layer_third_key(15, type, matrix);
map[layer_first_key] = 50;
map[layer_second_key] = 100;
map[layer_third_key] = 150;
ASSERT_EQ(map[layer_first_key], 50);
ASSERT_EQ(map[layer_second_key], 100);
ASSERT_EQ(map[layer_third_key], 150);
type = RasterCacheKeyType::kPicture;
RasterCacheKey picture_first_key(20, type, matrix);
RasterCacheKey picture_second_key(25, type, matrix);
RasterCacheKey picture_third_key(30, type, matrix);
map[picture_first_key] = 200;
map[picture_second_key] = 250;
map[picture_third_key] = 300;
ASSERT_EQ(map[picture_first_key], 200);
ASSERT_EQ(map[picture_second_key], 250);
ASSERT_EQ(map[picture_third_key], 300);
type = RasterCacheKeyType::kDisplayList;
RasterCacheKey display_list_first_key(35, type, matrix);
RasterCacheKey display_list_second_key(40, type, matrix);
RasterCacheKey display_list_third_key(45, type, matrix);
map[display_list_first_key] = 350;
map[display_list_second_key] = 400;
map[display_list_third_key] = 450;
ASSERT_EQ(map[display_list_first_key], 350);
ASSERT_EQ(map[display_list_second_key], 400);
ASSERT_EQ(map[display_list_third_key], 450);
type = RasterCacheKeyType::kLayerChildren;
RasterCacheKey layer_children_first_key(RasterCacheKeyID({1, 2, 3}), type,
matrix);
RasterCacheKey layer_children_second_key(RasterCacheKeyID({2, 3, 1}), type,
matrix);
RasterCacheKey layer_children_third_key(RasterCacheKeyID({3, 2, 1}), type,
matrix);
map[layer_children_first_key] = 100;
map[layer_children_second_key] = 200;
map[layer_children_third_key] = 300;
ASSERT_EQ(map[layer_children_first_key], 100);
ASSERT_EQ(map[layer_children_second_key], 200);
ASSERT_EQ(map[layer_children_third_key], 300);
}
TEST(RasterCache, RasterCacheKeyID_Equal) {
RasterCacheKeyID first = RasterCacheKeyID({1});
RasterCacheKeyID second = RasterCacheKeyID({1});
RasterCacheKeyID third = RasterCacheKeyID({2});
ASSERT_EQ(first, second);
ASSERT_NE(first, third);
RasterCacheKeyID fourth = RasterCacheKeyID({1, 2});
RasterCacheKeyID fifth = RasterCacheKeyID({1, 2});
RasterCacheKeyID sixth = RasterCacheKeyID({2, 1});
ASSERT_EQ(fourth, fifth);
ASSERT_NE(fourth, sixth);
}
TEST(RasterCache, RasterCacheKeyID_HashCode) {
uint64_t foo = 1;
uint64_t bar = 2;
RasterCacheKeyID first = RasterCacheKeyID({foo});
RasterCacheKeyID second = RasterCacheKeyID({foo, bar});
RasterCacheKeyID third = RasterCacheKeyID({bar, foo});
ASSERT_EQ(first.GetHash(), fml::HashCombine(foo));
ASSERT_EQ(second.GetHash(), fml::HashCombine(foo, bar));
ASSERT_EQ(third.GetHash(), fml::HashCombine(bar, foo));
}
} // namespace testing
} // namespace flutter