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/*
*
* 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.qpid.test.utils;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.FileOutputStream;
import junit.framework.TestCase;
import org.apache.qpid.util.FileUtils;
/**
* Utility methods intended to be used in unit tests that manipulate files
*/
public class TestFileUtils
{
private static final String SYSTEM_TMP_DIR = System.getProperty("java.io.tmpdir");
private static final String SUFFIX = "tmp";
/**
* Create and return a temporary directory that will be deleted on exit.
*/
public static File createTestDirectory()
{
String dirNameStem = TestFileUtils.class.getSimpleName() + "-testDir";
return createTestDirectory(dirNameStem, true);
}
/**
* Creates an empty directory with a name like /tmp/dirNameStem-12345678
*/
public static File createTestDirectory(String dirNameStem, boolean deleteOnExit)
{
File testDir = new File(SYSTEM_TMP_DIR, dirNameStem + "-" + System.currentTimeMillis());
if (testDir.exists())
{
FileUtils.delete(testDir, true);
}
testDir.mkdirs();
if (deleteOnExit)
{
testDir.deleteOnExit();
}
return testDir;
}
public static File createTempFile(TestCase testcase)
{
return createTempFile(testcase, SUFFIX);
}
public static File createTempFile(TestCase testcase, String suffix)
{
String prefix = testcase.getClass().getSimpleName() + "-" + testcase.getName();
File tmpFile;
try
{
tmpFile = File.createTempFile(prefix, suffix);
tmpFile.deleteOnExit();
}
catch (IOException e)
{
throw new RuntimeException("Cannot create temporary file with prefix " + prefix + " and suffix " + SUFFIX, e);
}
return tmpFile;
}
/**
* Creates a temporary file from the resource name given, using the resource name as the file suffix.
*
* This is required because the tests use the jar files as their class path.
*/
public static File createTempFileFromResource(TestCase testCase, String resourceName)
{
File dst = createTempFile(testCase, resourceName);
InputStream in = testCase.getClass().getResourceAsStream(resourceName);
try
{
FileUtils.copy(in, dst);
}
catch (Exception e)
{
throw new RuntimeException("Cannot copy resource " + resourceName +
" to temp file " + dst.getAbsolutePath(), e);
}
dst.deleteOnExit();
return dst;
}
/**
* Creates a temporary file for given test with given suffix in file name.
* The given content is stored in the file using UTF-8 encoding.
*/
public static File createTempFile(TestCase testcase, String suffix, String content)
{
File file = createTempFile(testcase, suffix);
if (content != null)
{
FileOutputStream fos = null;
try
{
fos = new FileOutputStream(file);
fos.write(content.getBytes("UTF-8"));
fos.flush();
}
catch (Exception e)
{
throw new RuntimeException("Cannot add the content into temp file " + file.getAbsolutePath(), e);
}
finally
{
if (fos != null)
{
try
{
fos.close();
}
catch (IOException e)
{
throw new RuntimeException("Cannot close output stream into temp file " + file.getAbsolutePath(), e);
}
}
}
}
return file;
}
}
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