lib/ui/painting/vertices_unittests.cc

// 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/lib/ui/painting/vertices.h"

#include <memory>

#include "flutter/common/task_runners.h"
#include "flutter/fml/synchronization/waitable_event.h"
#include "flutter/runtime/dart_vm.h"
#include "flutter/shell/common/shell_test.h"
#include "flutter/shell/common/thread_host.h"
#include "flutter/testing/testing.h"

namespace flutter {
namespace testing {

TEST_F(ShellTest, VerticesAccuratelyReportsSize) {
  auto message_latch = std::make_shared<fml::AutoResetWaitableEvent>();

  auto nativeValidateVertices = [message_latch](Dart_NativeArguments args) {
    auto handle = Dart_GetNativeArgument(args, 0);
    intptr_t peer = 0;
    Dart_Handle result = Dart_GetNativeInstanceField(
        handle, tonic::DartWrappable::kPeerIndex, &peer);
    ASSERT_FALSE(Dart_IsError(result));
    Vertices* vertices = reinterpret_cast<Vertices*>(peer);
    // GT because we don't want to be too dependent on platform specific
    // differences, or minor changes to Skia. The actual value of this on
    // macOS as of the test writing is 1441890ul. Just need to assert it's
    // big enough to get the Dart GC's attention.
    ASSERT_GT(vertices->GetAllocationSize(), 1300000ul);
    message_latch->Signal();
  };

  Settings settings = CreateSettingsForFixture();
  TaskRunners task_runners("test",                  // label
                           GetCurrentTaskRunner(),  // platform
                           CreateNewThread(),       // raster
                           CreateNewThread(),       // ui
                           CreateNewThread()        // io
  );

  AddNativeCallback("ValidateVertices",
                    CREATE_NATIVE_ENTRY(nativeValidateVertices));

  std::unique_ptr<Shell> shell =
      CreateShell(std::move(settings), std::move(task_runners));

  ASSERT_TRUE(shell->IsSetup());
  auto configuration = RunConfiguration::InferFromSettings(settings);
  configuration.SetEntrypoint("createVertices");

  shell->RunEngine(std::move(configuration), [](auto result) {
    ASSERT_EQ(result, Engine::RunStatus::Success);
  });

  message_latch->Wait();
  DestroyShell(std::move(shell), std::move(task_runners));
}

}  // namespace testing
}  // namespace flutter