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// Copyright 2023 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "components/reporting/util/statusor.h"
#include <memory>
#include <utility>
#include "base/functional/bind.h"
#include "base/functional/callback_forward.h"
#include "base/memory/weak_ptr.h"
#include "base/task/sequenced_task_runner.h"
#include "base/task/thread_pool.h"
#include "base/test/task_environment.h"
#include "base/types/expected.h"
#include "components/reporting/util/status.h"
#include "components/reporting/util/status_macros.h"
#include "components/reporting/util/test_support_callbacks.h"
#include "testing/gmock/include/gmock/gmock.h"
#include "testing/gtest/include/gtest/gtest.h"
using ::testing::AllOf;
using ::testing::Eq;
using ::testing::Property;
using ::testing::StrEq;
namespace reporting {
namespace {
TEST(StatusOr, MoveConstructFromAndExtractToStatusImplicitly) {
Status status(error::INTERNAL, "internal error");
base::unexpected<Status> unexpected_status(status);
StatusOr<int> status_or(std::move(unexpected_status));
Status extracted_status{std::move(status_or).error()};
EXPECT_EQ(status, extracted_status);
}
TEST(StatusOr, CopyConstructFromAndExtractToStatusImplicitly) {
Status status(error::INTERNAL, "internal error");
base::unexpected<Status> unexpected_status(status);
StatusOr<int> status_or(unexpected_status);
Status extracted_status{status_or.error()};
EXPECT_EQ(status, extracted_status);
}
TEST(StatusOr, CallbackAfterDeletion) {
base::test::TaskEnvironment test_env{};
class Handler {
public:
using Result = StatusOr<int64_t>;
Handler() = default;
Handler(const Handler&) = delete;
Handler& operator=(const Handler&) = delete;
void Handle(base::OnceCallback<void(Result)> done_cb) {
std::move(done_cb).Run(12345L);
}
base::WeakPtr<Handler> GetWeakPtr() {
return weak_ptr_factory_.GetWeakPtr();
}
private:
base::WeakPtrFactory<Handler> weak_ptr_factory_{this};
};
// Create seq task runner as required by weak pointers.
auto task_runner = base::ThreadPool::CreateSequencedTaskRunner({});
test::TestEvent<Handler::Result> cb_dead;
base::OnceClosure async_cb_dead;
{
std::unique_ptr<Handler, base::OnTaskRunnerDeleter> handler{
new Handler, base::OnTaskRunnerDeleter(task_runner)};
test::TestEvent<Handler::Result> cb_alive;
task_runner->PostTask(
FROM_HERE,
base::BindOnce(&Handler::Handle, handler->GetWeakPtr(), cb_alive.cb()));
const auto result = cb_alive.result();
ASSERT_TRUE(result.has_value()) << result.error();
EXPECT_THAT(result.value(), Eq(12345L));
async_cb_dead = base::BindOnce(
&Handler::Handle, handler->GetWeakPtr(),
Scoped<Handler::Result>(
cb_dead.cb(), base::unexpected(Status(error::UNAVAILABLE,
"Handler destructed"))));
}
// Out of scope: run after Handler has been deleted (on sequence!).
task_runner->PostTask(FROM_HERE, std::move(async_cb_dead));
// Make sure callback is still invoked, but with error.
const auto result = cb_dead.result();
EXPECT_FALSE(result.has_value());
EXPECT_THAT(
result.error(),
AllOf(Property(&Status::error_code, Eq(error::UNAVAILABLE)),
Property(&Status::error_message, StrEq("Handler destructed"))));
}
} // namespace
} // namespace reporting
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