/**
 *    Copyright (C) 2017 MongoDB Inc.
 *
 *    This program is free software: you can redistribute it and/or  modify
 *    it under the terms of the GNU Affero 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 Affero General Public License for more details.
 *
 *    You should have received a copy of the GNU Affero General Public License
 *    along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 *    As a special exception, the copyright holders give permission to link the
 *    code of portions of this program with the OpenSSL library under certain
 *    conditions as described in each individual source file and distribute
 *    linked combinations including the program with the OpenSSL library. You
 *    must comply with the GNU Affero General Public License in all respects
 *    for all of the code used other than as permitted herein. If you modify
 *    file(s) with this exception, you may extend this exception to your
 *    version of the file(s), but you are not obligated to do so. If you do not
 *    wish to do so, delete this exception statement from your version. If you
 *    delete this exception statement from all source files in the program,
 *    then also delete it in the license file.
 */

#include "mongo/platform/basic.h"

#include "mongo/db/operation_context_noop.h"
#include "mongo/db/s/namespace_metadata_change_notifications.h"
#include "mongo/db/service_context_noop.h"
#include "mongo/stdx/memory.h"
#include "mongo/stdx/thread.h"
#include "mongo/unittest/unittest.h"
#include "mongo/util/tick_source_mock.h"

namespace mongo {
namespace {

const NamespaceString kNss("foo.bar");

class NamespaceMetadataChangeNotificationsTest : public unittest::Test {
protected:
    NamespaceMetadataChangeNotificationsTest() {
        _serviceCtx.setTickSource(stdx::make_unique<TickSourceMock>());
    }

    void setUp() override {
        _client = _serviceCtx.makeClient("Test");
    }

    Client* client() const {
        return _client.get();
    }

private:
    ServiceContextNoop _serviceCtx;
    ServiceContext::UniqueClient _client;
};

TEST_F(NamespaceMetadataChangeNotificationsTest, WaitForNotify) {
    NamespaceMetadataChangeNotifications notifications;

    auto scopedNotif = notifications.createNotification(kNss);

    {
        auto opCtx = client()->makeOperationContext();
        opCtx->setDeadlineAfterNowBy(Milliseconds{0});
        ASSERT_THROWS_CODE(
            scopedNotif.get(opCtx.get()), AssertionException, ErrorCodes::ExceededTimeLimit);
    }

    notifications.notifyChange(kNss);

    {
        auto opCtx = client()->makeOperationContext();
        scopedNotif.get(opCtx.get());
    }
}

TEST_F(NamespaceMetadataChangeNotificationsTest, GiveUpWaitingForNotify) {
    NamespaceMetadataChangeNotifications notifications;

    {
        auto scopedNotif = notifications.createNotification(kNss);

        auto opCtx = client()->makeOperationContext();
        opCtx->setDeadlineAfterNowBy(Milliseconds{0});
        ASSERT_THROWS_CODE(
            scopedNotif.get(opCtx.get()), AssertionException, ErrorCodes::ExceededTimeLimit);
    }

    notifications.notifyChange(kNss);
}

TEST_F(NamespaceMetadataChangeNotificationsTest, MoveConstructionWaitForNotify) {
    NamespaceMetadataChangeNotifications notifications;

    auto scopedNotif = notifications.createNotification(kNss);
    auto movedScopedNotif = std::move(scopedNotif);

    {
        auto opCtx = client()->makeOperationContext();
        opCtx->setDeadlineAfterNowBy(Milliseconds{0});
        ASSERT_THROWS_CODE(
            movedScopedNotif.get(opCtx.get()), AssertionException, ErrorCodes::ExceededTimeLimit);
    }

    notifications.notifyChange(kNss);

    {
        auto opCtx = client()->makeOperationContext();
        movedScopedNotif.get(opCtx.get());
    }
}

}  // namespace
}  // namespace mongo