Commons IO example source code file (SizeFileComparatorTest.java)

This example Commons IO source code file (SizeFileComparatorTest.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

comparatorabstracttestcase, comparatorabstracttestcase, exception, exception, file, file, io, override, sizefilecomparatortest, sizefilecomparatortest

The Commons IO SizeFileComparatorTest.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.comparator;

import java.io.File;

/**
 * Test case for {@link SizeFileComparator}.
 */
public class SizeFileComparatorTest extends ComparatorAbstractTestCase {

    private File smallerDir;
    private File largerDir;
    private File smallerFile;
    private File largerFile;

    /**
     * Construct a new test case with the specified name.
     *
     * @param name Name of the test
     */
    public SizeFileComparatorTest(String name) {
        super(name);
    }

    /** @see junit.framework.TestCase#setUp() */
    @Override
    protected void setUp() throws Exception {
        super.setUp();
        comparator = (AbstractFileComparator)SizeFileComparator.SIZE_COMPARATOR;
        reverse = SizeFileComparator.SIZE_REVERSE;
        File dir = getTestDirectory();
        smallerDir = new File(dir, "smallerdir");
        largerDir = new File(dir, "largerdir");
        smallerFile = new File(smallerDir, "smaller.txt");
        File equalFile = new File(dir, "equal.txt");
        largerFile = new File(largerDir, "larger.txt");
        smallerDir.mkdir();
        largerDir.mkdir();
        createFile(smallerFile, 32);
        createFile(equalFile, 48);
        createFile(largerFile, 64);
        equalFile1 = equalFile;
        equalFile2 = equalFile;
        lessFile   = smallerFile;
        moreFile   = largerFile;
    }

    /**
     * Test a file which doesn't exist.
     */
    public void testNonexistantFile() {
        File nonexistantFile = new File(new File("."), "nonexistant.txt");
        assertFalse(nonexistantFile.exists());
        assertTrue("less",  comparator.compare(nonexistantFile, moreFile) < 0);
    }

    /**
     * Test a file which doesn't exist.
     */
    public void testCompareDirectorySizes() {
        assertEquals("sumDirectoryContents=false", 0, comparator.compare(smallerDir, largerDir));
        assertEquals("less", -1, SizeFileComparator.SIZE_SUMDIR_COMPARATOR.compare(smallerDir, largerDir));
        assertEquals("less", 1,  SizeFileComparator.SIZE_SUMDIR_REVERSE.compare(smallerDir, largerDir));
    }
}