/*
 * Copyright (c) "Neo4j"
 * Neo4j Sweden AB [http://neo4j.com]
 *
 * This file is part of Neo4j.
 *
 * Neo4j is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * 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/>.
 */
package org.neo4j.kernel.impl.api.index;

import static org.assertj.core.api.Assertions.assertThat;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.verify;

import org.junit.jupiter.api.Test;
import org.neo4j.test.OnDemandJobScheduler;

class IndexPopulationJobControllerTest {

    private final OnDemandJobScheduler executer = new OnDemandJobScheduler();
    private final IndexPopulationJobController jobController = new IndexPopulationJobController(executer);

    @Test
    void trackPopulationJobs() {
        assertThat(jobController.getPopulationJobs()).isEmpty();

        IndexPopulationJob populationJob = mock(IndexPopulationJob.class);
        jobController.startIndexPopulation(populationJob);
        assertThat(jobController.getPopulationJobs()).hasSize(1);

        IndexPopulationJob populationJob2 = mock(IndexPopulationJob.class);
        jobController.startIndexPopulation(populationJob2);
        assertThat(jobController.getPopulationJobs()).hasSize(2);
    }

    @Test
    void stopOngoingPopulationJobs() throws InterruptedException {
        IndexPopulationJob populationJob = getIndexPopulationJob();
        IndexPopulationJob populationJob2 = getIndexPopulationJob();
        jobController.startIndexPopulation(populationJob);
        jobController.startIndexPopulation(populationJob2);

        jobController.stop();

        verify(populationJob).stop();
        verify(populationJob2).stop();
    }

    @Test
    void untrackFinishedPopulations() {
        IndexPopulationJob populationJob = getIndexPopulationJob();
        jobController.startIndexPopulation(populationJob);

        assertThat(jobController.getPopulationJobs()).hasSize(1);

        executer.runJob();

        assertThat(jobController.getPopulationJobs()).hasSize(0);
        verify(populationJob).run();
    }

    private static IndexPopulationJob getIndexPopulationJob() {
        return mock(IndexPopulationJob.class);
    }
}
