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// Copyright 2017 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "content/browser/browser_main_loop.h"
#include "base/command_line.h"
#include "base/system/sys_info.h"
#include "base/task/thread_pool/thread_pool_instance.h"
#include "base/test/mock_callback.h"
#include "base/test/scoped_command_line.h"
#include "content/browser/browser_thread_impl.h"
#include "content/browser/scheduler/browser_task_executor.h"
#include "content/browser/startup_data_impl.h"
#include "content/browser/startup_helper.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/common/content_switches.h"
#include "content/public/common/main_function_params.h"
#include "content/public/test/test_utils.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace content {
using StrickMockTask =
testing::StrictMock<base::MockCallback<base::RepeatingCallback<void()>>>;
class BrowserMainLoopTest : public testing::Test {
protected:
BrowserMainLoopTest() {
base::test::ScopedCommandLine scoped_command_line;
scoped_command_line.GetProcessCommandLine()->AppendSwitch(
switches::kSingleProcess);
base::ThreadPoolInstance::Create("Browser");
StartBrowserThreadPool();
BrowserTaskExecutor::Create();
}
~BrowserMainLoopTest() override {
BrowserTaskExecutor::ResetForTesting();
for (int id = BrowserThread::UI; id < BrowserThread::ID_COUNT; ++id) {
BrowserThreadImpl::ResetGlobalsForTesting(
static_cast<BrowserThread::ID>(id));
}
base::ThreadPoolInstance::Get()->JoinForTesting();
base::ThreadPoolInstance::Set(nullptr);
}
const base::CommandLine* GetProcessCommandLine() {
return scoped_command_line_.GetProcessCommandLine();
}
private:
base::test::ScopedCommandLine scoped_command_line_;
}; // namespace content
// Verify that a single-process browser process has at least as many threads as
// the number of cores in its foreground pool.
TEST_F(BrowserMainLoopTest, CreateThreadsInSingleProcess) {
MainFunctionParams main_function_params(GetProcessCommandLine());
auto startup_data = std::make_unique<StartupDataImpl>();
startup_data->io_thread = BrowserTaskExecutor::CreateIOThread();
main_function_params.startup_data = std::move(startup_data);
BrowserMainLoop browser_main_loop(
std::move(main_function_params),
std::make_unique<base::ThreadPoolInstance::ScopedExecutionFence>());
browser_main_loop.Init();
browser_main_loop.CreateMainMessageLoop();
browser_main_loop.CreateThreads();
EXPECT_GE(base::ThreadPoolInstance::Get()
->GetMaxConcurrentNonBlockedTasksWithTraitsDeprecated(
{base::TaskPriority::USER_VISIBLE}),
static_cast<size_t>(base::SysInfo::NumberOfProcessors() - 1));
browser_main_loop.ShutdownThreadsAndCleanUp();
BrowserTaskExecutor::ResetForTesting();
}
TEST_F(BrowserMainLoopTest,
PostTaskToIOThreadBeforeThreadCreationDoesNotRunTask) {
MainFunctionParams main_function_params(GetProcessCommandLine());
auto startup_data = std::make_unique<StartupDataImpl>();
startup_data->io_thread = BrowserTaskExecutor::CreateIOThread();
main_function_params.startup_data = std::move(startup_data);
BrowserMainLoop browser_main_loop(
std::move(main_function_params),
std::make_unique<base::ThreadPoolInstance::ScopedExecutionFence>());
browser_main_loop.Init();
browser_main_loop.CreateMainMessageLoop();
StrickMockTask task;
// No task should run because IO thread has not been initialized yet.
GetIOThreadTaskRunner({})->PostTask(FROM_HERE, task.Get());
GetIOThreadTaskRunner({})->PostTask(FROM_HERE, task.Get());
content::RunAllPendingInMessageLoop(BrowserThread::IO);
EXPECT_CALL(task, Run).Times(2);
browser_main_loop.CreateThreads();
content::RunAllPendingInMessageLoop(BrowserThread::IO);
browser_main_loop.ShutdownThreadsAndCleanUp();
BrowserTaskExecutor::ResetForTesting();
}
} // namespace content
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