Commons IO example source code file (RegexFileFilterTestCase.java)

This example Commons IO source code file (RegexFileFilterTestCase.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

exception, file, file, filebasedtestcase, filter, filter, illegalargumentexception, illegalargumentexception, io, iofilefilter, override, regex, regexfilefilter, regexfilefilter, regexfilefiltertestcase, string

The Commons IO RegexFileFilterTestCase.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.filefilter;

import java.io.File;
import java.util.regex.Pattern;

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

/**
 * Used to test RegexFileFilterUtils.
 */
public class RegexFileFilterTestCase extends FileBasedTestCase {

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

    @Override
    public void setUp() {
        getTestDirectory().mkdirs();
    }

    @Override
    public void tearDown() throws Exception {
        FileUtils.deleteDirectory(getTestDirectory());
    }

    public void assertFiltering(IOFileFilter filter, File file, boolean expected) throws Exception {
        // Note. This only tests the (File, String) version if the parent of
        //       the File passed in is not null
        assertEquals(
            "Filter(File) " + filter.getClass().getName() + " not " + expected + " for " + file,
            expected, filter.accept(file));

        if (file != null && file.getParentFile() != null) {
            assertEquals(
                "Filter(File, String) " + filter.getClass().getName() + " not " + expected + " for " + file,
                expected, filter.accept(file.getParentFile(), file.getName()));
        } else if (file == null) {
            assertEquals(
                "Filter(File, String) " + filter.getClass().getName() + " not " + expected + " for null",
                expected, filter.accept(file));
        }
    }

    public void testRegex() throws Exception {
        IOFileFilter filter = new RegexFileFilter("^.*[tT]est(-\\d+)?\\.java$");
        assertFiltering(filter, new File("Test.java"), true);
        assertFiltering(filter, new File("test-10.java"), true);
        assertFiltering(filter, new File("test-.java"), false);

        filter = new RegexFileFilter("^[Tt]est.java$");
        assertFiltering(filter, new File("Test.java"), true);
        assertFiltering(filter, new File("test.java"), true);
        assertFiltering(filter, new File("tEST.java"), false);

        filter = new RegexFileFilter(Pattern.compile("^test.java$", Pattern.CASE_INSENSITIVE));
        assertFiltering(filter, new File("Test.java"), true);
        assertFiltering(filter, new File("test.java"), true);
        assertFiltering(filter, new File("tEST.java"), true);

        filter = new RegexFileFilter("^test.java$", Pattern.CASE_INSENSITIVE);
        assertFiltering(filter, new File("Test.java"), true);
        assertFiltering(filter, new File("test.java"), true);
        assertFiltering(filter, new File("tEST.java"), true);

        filter = new RegexFileFilter("^test.java$", IOCase.INSENSITIVE);
        assertFiltering(filter, new File("Test.java"), true);
        assertFiltering(filter, new File("test.java"), true);
        assertFiltering(filter, new File("tEST.java"), true);

        try {
            new RegexFileFilter((String)null);
            fail();
        } catch (IllegalArgumentException ex) {
            // expected
        }

        try {
            new RegexFileFilter((String)null, Pattern.CASE_INSENSITIVE);
            fail();
        } catch (IllegalArgumentException ex) {
            // expected
        }

        try {
            new RegexFileFilter((String)null, IOCase.INSENSITIVE);
            fail();
        } catch (IllegalArgumentException ex) {
            // expected
        }

        try {
            new RegexFileFilter((java.util.regex.Pattern)null);
            fail();
        } catch (IllegalArgumentException ex) {
            // expected
        }
    }
         
}