WatcherTest.java

/**
 * Copyright (C) 2015 Bonitasoft S.A.
 * Bonitasoft, 32 rue Gustave Eiffel - 38000 Grenoble
 * This program 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 2.0 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.bonitasoft.web.designer.livebuild;

import static org.assertj.core.api.Assertions.assertThat;

import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.StandardOpenOption;

import org.apache.commons.io.monitor.FileAlterationMonitor;
import org.bonitasoft.web.designer.utils.rule.TemporaryFolder;
import org.junit.*;
import org.junit.runner.RunWith;
import org.mockito.runners.MockitoJUnitRunner;

@RunWith(MockitoJUnitRunner.class)
public class WatcherTest {

    private final static long SLEEP_DELAY = 20;
    private final static long POLLING_DELAY = 10;

    @Rule
    public TemporaryFolder folder = new TemporaryFolder();

    private static FileAlterationMonitor monitor = new FileAlterationMonitor(POLLING_DELAY);

    private Watcher watcher = new Watcher(new ObserverFactory(), monitor);
    private Path subDirectory;

    @BeforeClass
    public static void startMonitor() throws Exception {
        monitor.start();
    }

    @AfterClass
    public static void stopMonitor() throws Exception {
        monitor.stop();
    }

    @Before
    public void setUp() throws Exception {
        subDirectory = Files.createDirectory(folder.toPath().resolve("un répertoire"));
    }

    @Test
    public void should_trigger_a_created_event_when_a_file_is_created() throws Exception {
        PathListenerStub listener = new PathListenerStub();
        watcher.watch(folder.toPath(), listener);

        Path file = Files.createFile(subDirectory.resolve("file"));

        Thread.sleep(SLEEP_DELAY);
        assertThat(listener.getChanged()).containsExactly(file);
    }

    @Test
    public void should_trigger_a_modified_event_when_a_file_is_modified() throws Exception {
        Path existingFile = Files.createFile(subDirectory.resolve("file"));
        PathListenerStub listener = new PathListenerStub();
        watcher.watch(folder.toPath(), listener);

        Files.write(existingFile, "hello".getBytes(), StandardOpenOption.APPEND);

        Thread.sleep(SLEEP_DELAY);
        assertThat(listener.getChanged()).containsExactly(existingFile);
    }

}