com.googlecode.xmlzen.utils.FileUtilsTest.java Source code

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Here is the source code for com.googlecode.xmlzen.utils.FileUtilsTest.java

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/*
 * Copyright 2009 Tomas Varaneckas 
 * http://www.varaneckas.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 com.googlecode.xmlzen.utils;

import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.junit.Test;

import com.googlecode.xmlzen.XmlZenException;

/**
 * Unit tests for {@link FileUtils}
 * 
 * @author Tomas Varaneckas <tomas.varaneckas@gmail.com>
 * @version $Id$
 */
public class FileUtilsTest {

    private static final Log log = LogFactory.getLog(FileUtils.class);

    @Test
    public void testBadFile() throws Exception {
        String n = FileUtils.readFile(new File("/dev/null"));
        assertTrue(n == null);
        File f = FileUtils.getClassPathFile("nonexistent");
        assertTrue(f == null);
        try {
            n = FileUtils.readFile(FileUtils.getClassPathFile("xmls/note.xml"), "FAKE-8");
            fail("Fake charset passed through");
        } catch (final XmlZenException e) {
            //expected
        }
    }

    @Test
    public void testGetClassPathFile() throws Exception {
        File f = FileUtils.getClassPathFile("xmls/note.xml");
        assertTrue(f.exists());
        f = FileUtils.getClassPathFile("voidvoid");
        assertTrue(f == null);
    }

    @Test
    public void testReadFile() throws Exception {
        File noteFile = FileUtils.getClassPathFile("xmls/note.xml");
        String note = FileUtils.readFile(noteFile);
        assertNotNull(note);
        assertTrue(note.length() > 0);
        log.debug("note.xml: " + note);
    }

    @Test
    public void testClose() throws Exception {
        FileUtils.close(null);
        FileInputStream in = new FileInputStream(FileUtils.getClassPathFile("xmls/note.xml"));
        in.read();
        FileUtils.close(in);
        try {
            in.read();
            fail("Stream should be closed: " + in);
        } catch (final IOException e) {
            //expected
        }
        FileUtils.close(in);
        try {
            FileUtils.close(new InputStream() {
                @Override
                public int read() throws IOException {
                    return 0;
                }

                @Override
                public void close() throws IOException {
                    throw new IOException("Fake close exception");
                }
            });
        } catch (final RuntimeException e) {
            fail("Should be caught somewhere else");
        }
    }
}