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// Copyright 2012 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/task_runner.h"
#include <memory>
#include <utility>
#include "base/functional/bind.h"
#include "base/location.h"
#include "base/run_loop.h"
#include "base/task/single_thread_task_runner.h"
#include "base/test/task_environment.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace base {
namespace {
int ReturnFourtyTwo() {
return 42;
}
void StoreValue(int* destination, int value) {
*destination = value;
}
void StoreDoubleValue(double* destination, double value) {
*destination = value;
}
int g_foo_destruct_count = 0;
int g_foo_free_count = 0;
struct Foo {
~Foo() { ++g_foo_destruct_count; }
};
std::unique_ptr<Foo> CreateFoo() {
return std::make_unique<Foo>();
}
void ExpectFoo(std::unique_ptr<Foo> foo) {
EXPECT_TRUE(foo.get());
std::unique_ptr<Foo> local_foo(std::move(foo));
EXPECT_TRUE(local_foo.get());
EXPECT_FALSE(foo.get());
}
struct FooDeleter {
void operator()(Foo* foo) const {
++g_foo_free_count;
delete foo;
}
};
std::unique_ptr<Foo, FooDeleter> CreateScopedFoo() {
return std::unique_ptr<Foo, FooDeleter>(new Foo);
}
void ExpectScopedFoo(std::unique_ptr<Foo, FooDeleter> foo) {
EXPECT_TRUE(foo.get());
std::unique_ptr<Foo, FooDeleter> local_foo(std::move(foo));
EXPECT_TRUE(local_foo.get());
EXPECT_FALSE(foo.get());
}
struct FooWithoutDefaultConstructor {
explicit FooWithoutDefaultConstructor(int value) : value(value) {}
int value;
};
FooWithoutDefaultConstructor CreateFooWithoutDefaultConstructor(int value) {
return FooWithoutDefaultConstructor(value);
}
void SaveFooWithoutDefaultConstructor(int* output_value,
FooWithoutDefaultConstructor input) {
*output_value = input.value;
}
class TaskRunnerTest : public testing::Test {
public:
TaskRunnerTest() = default;
void SetUp() override {
g_foo_destruct_count = 0;
g_foo_free_count = 0;
}
};
} // namespace
TEST_F(TaskRunnerTest, PostTaskAndReplyWithResult) {
int result = 0;
test::SingleThreadTaskEnvironment task_environment;
SingleThreadTaskRunner::GetCurrentDefault()->PostTaskAndReplyWithResult(
FROM_HERE, BindOnce(&ReturnFourtyTwo), BindOnce(&StoreValue, &result));
RunLoop().RunUntilIdle();
EXPECT_EQ(42, result);
}
TEST_F(TaskRunnerTest, PostTaskAndReplyWithResultRepeatingCallbacks) {
int result = 0;
test::SingleThreadTaskEnvironment task_environment;
SingleThreadTaskRunner::GetCurrentDefault()->PostTaskAndReplyWithResult(
FROM_HERE, BindRepeating(&ReturnFourtyTwo),
BindRepeating(&StoreValue, &result));
RunLoop().RunUntilIdle();
EXPECT_EQ(42, result);
}
TEST_F(TaskRunnerTest, PostTaskAndReplyWithResultImplicitConvert) {
double result = 0;
test::SingleThreadTaskEnvironment task_environment;
SingleThreadTaskRunner::GetCurrentDefault()->PostTaskAndReplyWithResult(
FROM_HERE, BindOnce(&ReturnFourtyTwo),
BindOnce(&StoreDoubleValue, &result));
RunLoop().RunUntilIdle();
EXPECT_DOUBLE_EQ(42.0, result);
}
TEST_F(TaskRunnerTest, PostTaskAndReplyWithResultPassed) {
test::SingleThreadTaskEnvironment task_environment;
SingleThreadTaskRunner::GetCurrentDefault()->PostTaskAndReplyWithResult(
FROM_HERE, BindOnce(&CreateFoo), BindOnce(&ExpectFoo));
RunLoop().RunUntilIdle();
EXPECT_EQ(1, g_foo_destruct_count);
EXPECT_EQ(0, g_foo_free_count);
}
TEST_F(TaskRunnerTest, PostTaskAndReplyWithResultPassedFreeProc) {
test::SingleThreadTaskEnvironment task_environment;
SingleThreadTaskRunner::GetCurrentDefault()->PostTaskAndReplyWithResult(
FROM_HERE, BindOnce(&CreateScopedFoo), BindOnce(&ExpectScopedFoo));
RunLoop().RunUntilIdle();
EXPECT_EQ(1, g_foo_destruct_count);
EXPECT_EQ(1, g_foo_free_count);
}
TEST_F(TaskRunnerTest, PostTaskAndReplyWithResultWithoutDefaultConstructor) {
const int kSomeVal = 17;
test::SingleThreadTaskEnvironment task_environment;
int actual = 0;
SingleThreadTaskRunner::GetCurrentDefault()->PostTaskAndReplyWithResult(
FROM_HERE, BindOnce(&CreateFooWithoutDefaultConstructor, kSomeVal),
BindOnce(&SaveFooWithoutDefaultConstructor, &actual));
RunLoop().RunUntilIdle();
EXPECT_EQ(kSomeVal, actual);
}
} // namespace base
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