Commons IO example source code file (FileUtilsCleanDirectoryTestCase.java)

This example Commons IO source code file (FileUtilsCleanDirectoryTestCase.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Commons IO tags/keywords

arraylist, exception, exception, file, file, fileutilscleandirectorytestcase, interruptedexception, io, ioexception, ioexception, list, override, unable, util, win, win

The Commons IO FileUtilsCleanDirectoryTestCase.java source code

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF 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
 * 
 *      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 org.apache.commons.io;

import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

import org.apache.commons.io.testtools.FileBasedTestCase;

/**
 * Test cases for FileUtils.cleanDirectory() method.
 *
 * @version $Id: FileUtilsCleanDirectoryTestCase.java 919474 2010-03-05 16:31:43Z sebb $
 * @author Chris Eldredge
 */
public class FileUtilsCleanDirectoryTestCase extends FileBasedTestCase {
    final File top = getLocalTestDirectory();

    public FileUtilsCleanDirectoryTestCase(String name) {
        super(name);
    }

    private File getLocalTestDirectory() {
        return new File(getTestDirectory(), "list-files");
    }

    /**
     * @see junit.framework.TestCase#setUp()
     */
    @Override
    protected void setUp() throws Exception {
        top.mkdirs();
    }

    /**
     * @see junit.framework.TestCase#tearDown()
     */
    @Override
    protected void tearDown() throws Exception {
        chmod(top, 775, true);
        FileUtils.deleteDirectory(top);
    }

    //-----------------------------------------------------------------------
    public void testCleanEmpty() throws Exception {
        assertEquals(0, top.list().length);

        FileUtils.cleanDirectory(top);

        assertEquals(0, top.list().length);
    }

    public void testDeletesRegular() throws Exception {
        FileUtils.touch(new File(top, "regular"));
        FileUtils.touch(new File(top, ".hidden"));

        assertEquals(2, top.list().length);

        FileUtils.cleanDirectory(top);

        assertEquals(0, top.list().length);
    }

    public void testDeletesNested() throws Exception {
        final File nested = new File(top, "nested");

        assertTrue(nested.mkdirs());

        FileUtils.touch(new File(nested, "file"));

        assertEquals(1, top.list().length);

        FileUtils.cleanDirectory(top);

        assertEquals(0, top.list().length);
    }

    public void testThrowsOnNullList() throws Exception {
        if (System.getProperty("os.name").startsWith("Win")  ||  !chmod(top, 0, false)) {
            // test wont work if we can't restrict permissions on the
            // directory, so skip it.
            return;
        }

        try {
            FileUtils.cleanDirectory(top);
            fail("expected IOException");
        } catch (IOException e) {
            assertEquals("Failed to list contents of " +
                    top.getAbsolutePath(), e.getMessage());
        }
    }

    public void testThrowsOnCannotDeleteFile() throws Exception {
        final File file = new File(top, "restricted");
        FileUtils.touch(file);

        if (System.getProperty("os.name").startsWith("Win")  ||  !chmod(top, 500, false)) {
            // test wont work if we can't restrict permissions on the
            // directory, so skip it.
            return;
        }

        try {
            FileUtils.cleanDirectory(top);
            fail("expected IOException");
        } catch (IOException e) {
            assertEquals("Unable to delete file: " +
                    file.getAbsolutePath(), e.getMessage());
        }
    }

    private boolean chmod(File file, int mode, boolean recurse)
            throws InterruptedException {
        // TODO: Refactor this to FileSystemUtils
        List<String> args = new ArrayList();
        args.add("chmod");

        if (recurse) {
            args.add("-R");
        }

        args.add(Integer.toString(mode));
        args.add(file.getAbsolutePath());

        Process proc;

        try {
            proc = Runtime.getRuntime().exec(
                    args.toArray(new String[args.size()]));
        } catch (IOException e) {
            return false;
        }
        int result = proc.waitFor();
        return (result == 0);
    }

}