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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/dispatch/action_queue.h"
#include "mir/test/fd_utils.h"
#include <gtest/gtest.h>
#include <gmock/gmock.h>
namespace mt = mir::test;
namespace md = mir::dispatch;
using namespace ::testing;
TEST(ActionQueue, watch_fd_becomes_readable_on_enqueue)
{
md::ActionQueue queue;
ASSERT_FALSE(mt::fd_is_readable(queue.watch_fd()));
queue.enqueue([]{});
ASSERT_TRUE(mt::fd_is_readable(queue.watch_fd()));
}
TEST(ActionQueue, executes_action_on_dispatch)
{
md::ActionQueue queue;
auto action_exeuted = false;
queue.enqueue([&](){action_exeuted = true;});
ASSERT_FALSE(action_exeuted);
queue.dispatch(md::FdEvent::readable);
ASSERT_TRUE(action_exeuted);
}
TEST(ActionQueue, calls_nothing_on_error)
{
md::ActionQueue queue;
auto action_exeuted = false;
queue.enqueue([&](){action_exeuted = true;});
queue.dispatch(md::FdEvent::error);
ASSERT_FALSE(action_exeuted);
}
TEST(ActionQueue, executes_action_only_once)
{
md::ActionQueue queue;
auto count_executed = 0;
queue.enqueue([&](){++count_executed;});
queue.dispatch(md::FdEvent::readable);
// The queue now doesn't need to be dispatched...
EXPECT_FALSE(mt::fd_is_readable(queue.watch_fd()));
// ...but might be anyway, in the case of multithreaded dispatching.
queue.dispatch(md::FdEvent::readable);
queue.dispatch(md::FdEvent::readable);
// Even so, we expect our action to be executed only once.
EXPECT_THAT(count_executed, Eq(1));
}
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