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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 "base/task/single_thread_task_runner.h"
#include "base/memory/scoped_refptr.h"
#include "base/run_loop.h"
#include "base/task/sequenced_task_runner.h"
#include "base/task/single_thread_task_runner.h"
#include "base/test/gtest_util.h"
#include "base/test/task_environment.h"
#include "base/test/test_simple_task_runner.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace base {
TEST(SingleThreadTaskRunnerCurrentDefaultHandleTest, Basic) {
scoped_refptr<SingleThreadTaskRunner> task_runner(
MakeRefCounted<TestSimpleTaskRunner>());
EXPECT_FALSE(SingleThreadTaskRunner::HasCurrentDefault());
{
SingleThreadTaskRunner::CurrentDefaultHandle sttcd1(task_runner);
EXPECT_TRUE(SingleThreadTaskRunner::HasCurrentDefault());
EXPECT_EQ(task_runner, SingleThreadTaskRunner::GetCurrentDefault());
}
EXPECT_FALSE(SingleThreadTaskRunner::HasCurrentDefault());
}
TEST(SingleThreadTaskRunnerCurrentDefaultHandleTest, DeathOnImplicitOverride) {
scoped_refptr<SingleThreadTaskRunner> task_runner(
MakeRefCounted<TestSimpleTaskRunner>());
scoped_refptr<SingleThreadTaskRunner> overidding_task_runner(
MakeRefCounted<TestSimpleTaskRunner>());
SingleThreadTaskRunner::CurrentDefaultHandle sttcd(task_runner);
EXPECT_DCHECK_DEATH({
SingleThreadTaskRunner::CurrentDefaultHandle overriding_sttcd(
overidding_task_runner);
});
}
TEST(SingleThreadTaskRunnerCurrentDefaultHandleTest, OverrideExistingSTTCD) {
scoped_refptr<SingleThreadTaskRunner> task_runner_1(
MakeRefCounted<TestSimpleTaskRunner>());
scoped_refptr<SingleThreadTaskRunner> task_runner_2(
MakeRefCounted<TestSimpleTaskRunner>());
scoped_refptr<SingleThreadTaskRunner> task_runner_3(
MakeRefCounted<TestSimpleTaskRunner>());
scoped_refptr<SingleThreadTaskRunner> task_runner_4(
MakeRefCounted<TestSimpleTaskRunner>());
EXPECT_FALSE(SingleThreadTaskRunner::HasCurrentDefault());
{
// STTCD in place prior to override.
SingleThreadTaskRunner::CurrentDefaultHandle sttcd1(task_runner_1);
EXPECT_TRUE(SingleThreadTaskRunner::HasCurrentDefault());
EXPECT_EQ(task_runner_1, SingleThreadTaskRunner::GetCurrentDefault());
{
// Override.
SingleThreadTaskRunner::CurrentHandleOverrideForTesting sttcd_override_2(
task_runner_2);
EXPECT_TRUE(SingleThreadTaskRunner::HasCurrentDefault());
EXPECT_EQ(task_runner_2, SingleThreadTaskRunner::GetCurrentDefault());
{
// Nested override.
SingleThreadTaskRunner::CurrentHandleOverrideForTesting
sttcd_override_3(task_runner_3);
EXPECT_TRUE(SingleThreadTaskRunner::HasCurrentDefault());
EXPECT_EQ(task_runner_3, SingleThreadTaskRunner::GetCurrentDefault());
}
// Back to single override.
EXPECT_TRUE(SingleThreadTaskRunner::HasCurrentDefault());
EXPECT_EQ(task_runner_2, SingleThreadTaskRunner::GetCurrentDefault());
{
// Backup to double override with another STTCD.
SingleThreadTaskRunner::CurrentHandleOverrideForTesting
sttcd_override_4(task_runner_4);
EXPECT_TRUE(SingleThreadTaskRunner::HasCurrentDefault());
EXPECT_EQ(task_runner_4, SingleThreadTaskRunner::GetCurrentDefault());
}
}
// Back to simple STTCD.
EXPECT_TRUE(SingleThreadTaskRunner::HasCurrentDefault());
EXPECT_EQ(task_runner_1, SingleThreadTaskRunner::GetCurrentDefault());
}
EXPECT_FALSE(SingleThreadTaskRunner::HasCurrentDefault());
}
TEST(SingleThreadTaskRunnerCurrentDefaultHandleTest, OverrideNoExistingSTTCD) {
scoped_refptr<SingleThreadTaskRunner> task_runner_1(
MakeRefCounted<TestSimpleTaskRunner>());
scoped_refptr<SingleThreadTaskRunner> task_runner_2(
MakeRefCounted<TestSimpleTaskRunner>());
EXPECT_FALSE(SingleThreadTaskRunner::HasCurrentDefault());
{
// Override with no STTCD in place.
SingleThreadTaskRunner::CurrentHandleOverrideForTesting sttcd_override_1(
task_runner_1);
EXPECT_TRUE(SingleThreadTaskRunner::HasCurrentDefault());
EXPECT_EQ(task_runner_1, SingleThreadTaskRunner::GetCurrentDefault());
{
// Nested override works the same.
SingleThreadTaskRunner::CurrentHandleOverrideForTesting sttcd_override_2(
task_runner_2);
EXPECT_TRUE(SingleThreadTaskRunner::HasCurrentDefault());
EXPECT_EQ(task_runner_2, SingleThreadTaskRunner::GetCurrentDefault());
}
// Back to single override.
EXPECT_TRUE(SingleThreadTaskRunner::HasCurrentDefault());
EXPECT_EQ(task_runner_1, SingleThreadTaskRunner::GetCurrentDefault());
}
EXPECT_FALSE(SingleThreadTaskRunner::HasCurrentDefault());
}
TEST(SingleThreadTaskRunnerCurrentDefaultHandleTest, DeathOnSTTCDOverOverride) {
scoped_refptr<SingleThreadTaskRunner> task_runner(
MakeRefCounted<TestSimpleTaskRunner>());
scoped_refptr<SingleThreadTaskRunner> overidding_task_runner(
MakeRefCounted<TestSimpleTaskRunner>());
SingleThreadTaskRunner::CurrentHandleOverrideForTesting sttcd_override(
task_runner);
EXPECT_DCHECK_DEATH({
SingleThreadTaskRunner::CurrentDefaultHandle overriding_sttrcd(
overidding_task_runner);
});
}
TEST(SingleThreadTaskRunnerCurrentDefaultHandleTest, NestedRunLoop) {
test::SingleThreadTaskEnvironment task_environment;
EXPECT_TRUE(SingleThreadTaskRunner::HasCurrentDefault());
scoped_refptr<SingleThreadTaskRunner> task_runner(
MakeRefCounted<TestSimpleTaskRunner>());
SingleThreadTaskRunner::CurrentHandleOverride sttrcd_override(
task_runner,
/*allow_nested_runloop=*/true);
EXPECT_TRUE(SingleThreadTaskRunner::HasCurrentDefault());
EXPECT_EQ(task_runner, SingleThreadTaskRunner::GetCurrentDefault());
EXPECT_EQ(task_runner, SequencedTaskRunner::GetCurrentDefault());
RunLoop().RunUntilIdle();
}
TEST(SingleThreadTaskRunnerCurrentDefaultHandleTest, DeathOnNestedRunLoop) {
test::SingleThreadTaskEnvironment task_environment;
EXPECT_TRUE(SingleThreadTaskRunner::HasCurrentDefault());
scoped_refptr<SingleThreadTaskRunner> task_runner(
MakeRefCounted<TestSimpleTaskRunner>());
SingleThreadTaskRunner::CurrentHandleOverrideForTesting sttcd_override(
task_runner);
EXPECT_TRUE(SingleThreadTaskRunner::HasCurrentDefault());
EXPECT_EQ(task_runner, SingleThreadTaskRunner::GetCurrentDefault());
EXPECT_EQ(task_runner, SequencedTaskRunner::GetCurrentDefault());
EXPECT_DCHECK_DEATH({ RunLoop().RunUntilIdle(); });
}
} // namespace base
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