es.molabs.io.utils.test.FileWatcherRunnableTest.java Source code

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Here is the source code for es.molabs.io.utils.test.FileWatcherRunnableTest.java

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/**
 * Copyright (C) 2016 Luis Moral Guerrero <luis.moral@gmail.com>
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package es.molabs.io.utils.test;

import java.io.File;
import java.net.URL;
import java.nio.charset.Charset;
import java.nio.file.FileSystems;
import java.nio.file.WatchService;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

import org.apache.commons.io.FileUtils;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.mockito.Mockito;
import org.mockito.runners.MockitoJUnitRunner;

import es.molabs.io.utils.FileWatcherHandler;
import es.molabs.io.utils.FileWatcherRunnable;

@RunWith(MockitoJUnitRunner.class)
public class FileWatcherRunnableTest {
    private final static long REFRESH_MARGIN = 500;

    private ExecutorService executor = null;

    @Test
    public void testEntryCreate() throws Throwable {
        URL file = getClass().getResource("/es/molabs/io/utils/test/filewatcher/");

        // Deletes the file if already exists
        File newFile = new File(file.getFile() + File.separator + "test-create.txt");
        if (newFile.exists())
            newFile.delete();

        WatchService watchService = FileSystems.getDefault().newWatchService();
        FileWatcherHandler handler = Mockito.mock(FileWatcherHandler.class);
        FileWatcherRunnable fileWatcherRunnable = new FileWatcherRunnable(watchService, handler);
        fileWatcherRunnable.addFile(file);
        executor.submit(fileWatcherRunnable);

        // Creates the file
        newFile.createNewFile();

        // Waits the refresh time
        Thread.sleep(fileWatcherRunnable.getRefreshTime() + REFRESH_MARGIN);

        // Checks that the event handler has been called one time      
        Mockito.verify(handler, Mockito.times(1)).entryCreate(Mockito.any());

        // Stops the service
        watchService.close();
    }

    @Test
    public void testEntryModify() throws Throwable {
        URL file = getClass().getResource("/es/molabs/io/utils/test/filewatcher/test.txt");

        WatchService watchService = FileSystems.getDefault().newWatchService();
        FileWatcherHandler handler = Mockito.mock(FileWatcherHandler.class);
        FileWatcherRunnable fileWatcherRunnable = new FileWatcherRunnable(watchService, handler);
        fileWatcherRunnable.addFile(file);
        executor.submit(fileWatcherRunnable);

        // Writes to the file
        FileUtils.write(new File(file.getFile()), "test data.", Charset.defaultCharset());

        // Waits the refresh time
        Thread.sleep(fileWatcherRunnable.getRefreshTime() + REFRESH_MARGIN);

        // Checks that the event handler has been called one time      
        Mockito.verify(handler, Mockito.times(1)).entryModify(Mockito.any());

        // Stops the service
        watchService.close();
    }

    @Test
    public void testEntryDelete() throws Throwable {
        URL file = getClass().getResource("/es/molabs/io/utils/test/filewatcher/");

        // Creates the file if it does not exist
        File newFile = new File(file.getFile() + File.separator + "test-delete.txt");
        if (!newFile.exists())
            newFile.createNewFile();

        WatchService watchService = FileSystems.getDefault().newWatchService();
        FileWatcherHandler handler = Mockito.mock(FileWatcherHandler.class);
        FileWatcherRunnable fileWatcherRunnable = new FileWatcherRunnable(watchService, handler);
        fileWatcherRunnable.addFile(file);
        executor.submit(fileWatcherRunnable);

        // Delete the file
        newFile.delete();

        // Waits the refresh time
        Thread.sleep(fileWatcherRunnable.getRefreshTime() + REFRESH_MARGIN);

        // Checks that the event handler has been called one time      
        Mockito.verify(handler, Mockito.times(1)).entryDelete(Mockito.any());

        // Stops the service
        watchService.close();
    }

    @Before
    public void setUp() {
        executor = Executors.newSingleThreadExecutor();
    }

    @After
    public void tearDown() {
        executor.shutdown();
    }
}