/**
 * Licensed to Apereo under one or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information regarding copyright ownership. Apereo
 * licenses this file to you 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 the
 * following location:
 *
 * <p>http://www.apache.org/licenses/LICENSE-2.0
 *
 * <p>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 org.apereo.portal.utils;

import static junit.framework.Assert.assertEquals;

import com.google.common.base.Functions;
import java.io.File;
import java.io.InputStream;
import java.util.Collections;
import java.util.Map;
import org.apache.commons.io.FileUtils;
import org.apache.commons.io.IOUtils;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.springframework.core.io.Resource;
import org.springframework.scheduling.concurrent.ThreadPoolExecutorFactoryBean;

/**
 */
public class ConcurrentDirectoryScannerTest {
    private ThreadPoolExecutorFactoryBean executorServiceFactory;
    private ConcurrentDirectoryScanner directoryScanner;
    private File testDirectory;

    @Before
    public void setup() throws Exception {
        testDirectory = File.createTempFile("ConcurrentDirectoryScannerTest_", "_dir");
        testDirectory.delete();
        testDirectory.mkdirs();

        final InputStream dataZipStream =
                this.getClass().getResourceAsStream("/org/apereo/portal/utils/DirScannerData.zip");
        ZipUtils.extract(dataZipStream, testDirectory);
        IOUtils.closeQuietly(dataZipStream);

        executorServiceFactory = new ThreadPoolExecutorFactoryBean();
        executorServiceFactory.setCorePoolSize(0);
        executorServiceFactory.setMaxPoolSize(1);
        executorServiceFactory.setQueueCapacity(500);
        executorServiceFactory.setKeepAliveSeconds(30);
        executorServiceFactory.setAllowCoreThreadTimeOut(true);
        executorServiceFactory.setDaemon(true);
        executorServiceFactory.afterPropertiesSet();

        this.directoryScanner = new ConcurrentDirectoryScanner(executorServiceFactory.getObject());
    }

    @After
    public void teardown() throws Exception {
        executorServiceFactory.destroy();
        FileUtils.deleteDirectory(testDirectory);
    }

    @Test
    public void testDirectoryScanner() {
        final AntPatternFileFilter fileFilter =
                new AntPatternFileFilter(
                        true,
                        true,
                        Collections.<String>singleton("**"),
                        Collections.<String>emptySet());

        final Map<File, Resource> results =
                directoryScanner.scanDirectoryWithResults(
                        testDirectory, fileFilter, Functions.<Resource>identity());

        assertEquals(7, results.size());
    }
}