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/*
* Copyright © 2012-2013 Canonical Ltd.
*
* This program is free software: you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License version 3,
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* Authored by: Thomas Voß <thomas.voss@canonical.com>
*/
#ifndef CORE_TESTING_FORK_AND_RUN_H_
#define CORE_TESTING_FORK_AND_RUN_H_
#include <core/posix/exit.h>
#include <core/posix/fork.h>
#include <core/posix/visibility.h>
#include <functional>
namespace core
{
namespace testing
{
/**
* @brief The ForkAndRunResult enum models the different failure modes of fork_and_run.
*/
enum class ForkAndRunResult
{
empty = 0, ///< Special value indicating no bit being set.
client_failed = 1 << 0, ///< The client failed.
service_failed = 1 << 1 ///< The service failed.
};
CORE_POSIX_DLL_PUBLIC ForkAndRunResult operator|(ForkAndRunResult lhs, ForkAndRunResult rhs);
CORE_POSIX_DLL_PUBLIC ForkAndRunResult operator&(ForkAndRunResult lhs, ForkAndRunResult rhs);
/**
* @brief Forks two processes for both the service and the client.
*
* The function does the following:
* - Forks a process for the service and runs the respective closure.
* - Forks a process for the client and runs the respective closure.
* - After the client has finished, the service is signalled with sigterm.
*
* @throw std::system_error if an error occurred during process interaction.
* @throw std::runtime_error for signalling all other error conditions.
* @param [in] service The service to be executed in a child process.
* @param [in] client The client to be executed in a child process.
* @return ForkAndRunResult indicating if either of service or client failed.
*/
CORE_POSIX_DLL_PUBLIC ForkAndRunResult fork_and_run(
const std::function<core::posix::exit::Status()>& service,
const std::function<core::posix::exit::Status()>& client);
}
}
/**
* Test definition macro which runs a TEST in a forked process.
* Note that you can only use EXPECT_*, not
* ASSERT_*!
*
* Usage:
* TESTP(test_suite, test_name, {
* test code ...
* EXPECT_* ...
* })
*/
#define TESTP(test_suite, test_name, CODE) \
TEST(test_suite, test_name) { \
auto test = [&]() { \
CODE \
return HasFailure() ? core::posix::exit::Status::failure \
: core::posix::exit::Status::success; \
}; \
auto child = core::posix::fork( \
test, \
core::posix::StandardStream::empty); \
auto result = child.wait_for(core::posix::wait::Flags::untraced); \
EXPECT_EQ(core::posix::wait::Result::Status::exited, result.status); \
EXPECT_EQ(core::posix::exit::Status::success, result.detail.if_exited.status); \
} \
/**
* Test definition macro which runs a TEST_F in a forked process.
* Note that you can only use EXPECT_*, not ASSERT_*!
*
* Usage:
* TESTP_F(FixtureName, TestName, {
* ... test code ...
* EXPECT_* ...
* })
*/
#define TESTP_F(test_fixture, test_name, CODE) \
TEST_F(test_fixture, test_name) { \
auto test = [&]() { \
CODE \
return HasFailure() ? core::posix::exit::Status::failure \
: core::posix::exit::Status::success; \
}; \
auto child = core::posix::fork( \
test, \
core::posix::StandardStream::empty); \
auto result = child.wait_for(core::posix::wait::Flags::untraced); \
EXPECT_EQ(core::posix::wait::Result::Status::exited, result.status); \
EXPECT_EQ(core::posix::exit::Status::success, result.detail.if_exited.status); \
} \
#endif // CORE_TESTING_FORK_AND_RUN_H_
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