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/*
* Copyright © Canonical Ltd.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 or 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "mir_test_framework/process.h"
#include <condition_variable>
#include <mutex>
#include <gtest/gtest.h>
namespace mtf = mir_test_framework;
namespace mir
{
struct MainFunctionFactory
{
static void an_empty_main_function()
{
}
static void an_infinitely_waiting_main_function()
{
std::mutex m;
std::unique_lock ul(m);
std::condition_variable cv;
cv.wait(ul);
}
static void a_value_altering_main_function(
int& value,
int expected_value_after_increment)
{
value++;
EXPECT_EQ(
expected_value_after_increment,
value);
}
};
struct ExitFunctionFactory
{
static int a_successful_exit_function()
{
return EXIT_SUCCESS;
}
static int a_failing_exit_function()
{
return EXIT_FAILURE;
}
static int a_gtest_exit_function()
{
return ::testing::Test::HasFailure() ? EXIT_FAILURE : EXIT_SUCCESS;
}
};
TEST(ProcessResult,
a_default_result_never_succeeds)
{
mtf::Result r;
EXPECT_FALSE(r.succeeded());
}
TEST(ProcessResult,
a_signalled_result_does_not_succeed)
{
mtf::Result r;
r.reason = mtf::TerminationReason::child_terminated_by_signal;
EXPECT_FALSE(r.succeeded());
}
TEST(ProcessResult,
a_normally_terminated_result_succeeds_only_with_exit_success)
{
mtf::Result r;
r.reason = mtf::TerminationReason::child_terminated_normally;
r.exit_code = EXIT_FAILURE;
EXPECT_FALSE(r.succeeded());
r.exit_code = EXIT_SUCCESS;
EXPECT_TRUE(r.succeeded());
}
TEST(Process,
a_main_fn_is_executed)
{
int value = 0;
auto p = mtf::fork_and_run_in_a_different_process(
std::bind(
MainFunctionFactory::a_value_altering_main_function,
value,
1),
ExitFunctionFactory::a_gtest_exit_function);
EXPECT_TRUE(p->wait_for_termination().succeeded());
}
TEST(Process,
a_successful_exit_function_succeeds)
{
auto p = mtf::fork_and_run_in_a_different_process(
MainFunctionFactory::an_empty_main_function,
ExitFunctionFactory::a_successful_exit_function);
EXPECT_TRUE(p->wait_for_termination().succeeded());
}
TEST(Process,
a_failing_exit_function_does_not_succeed)
{
auto p = mtf::fork_and_run_in_a_different_process(
MainFunctionFactory::an_empty_main_function,
ExitFunctionFactory::a_failing_exit_function);
EXPECT_FALSE(p->wait_for_termination().succeeded());
}
TEST(Process,
a_terminated_child_is_recognized_as_being_signalled)
{
auto p = mtf::fork_and_run_in_a_different_process(
MainFunctionFactory::an_infinitely_waiting_main_function,
ExitFunctionFactory::a_successful_exit_function);
p->terminate();
EXPECT_TRUE(p->wait_for_termination().signalled());
}
TEST(Process,
a_killed_child_is_recognized_as_being_signalled)
{
auto p = mtf::fork_and_run_in_a_different_process(
MainFunctionFactory::an_infinitely_waiting_main_function,
ExitFunctionFactory::a_successful_exit_function);
p->kill();
EXPECT_TRUE(p->wait_for_termination().signalled());
}
}
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