// Copyright 2006 The Apache Software Foundation
//
// 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 org.apache.tapestry.internal.services;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.net.URL;
import java.util.Arrays;
import org.apache.tapestry.internal.test.InternalBaseTestCase;
import org.apache.tapestry.services.ResourceDigestGenerator;
import org.testng.annotations.Test;
public class ResourceDigestGeneratorImplTest extends InternalBaseTestCase
{
@Test
public void typical_file() throws Exception
{
URL url = getClass().getResource("ResourceDigestGeneratorImplTest.class");
ResourceDigestGenerator g = new ResourceDigestGeneratorImpl(Arrays.asList("class"));
String digest = g.generateDigest(url);
assertTrue(digest.length() > 0);
String checksum2 = g.generateDigest(url);
assertEquals(checksum2, digest);
}
@Test
public void digest_changes_with_changes_to_file() throws Exception
{
File file = File.createTempFile("digest.", ".dat");
URL url = file.toURL();
ResourceDigestGenerator g = new ResourceDigestGeneratorImpl(Arrays.asList("class"));
String prevDigest = g.generateDigest(url);
for (int i = 0; i < 5; i++)
{
writeJunkTofile(file);
String digest = g.generateDigest(url);
assertFalse(digest.equals(prevDigest));
prevDigest = digest;
}
}
private void writeJunkTofile(File file) throws IOException
{
OutputStream os = new BufferedOutputStream(new FileOutputStream(file, true));
OutputStreamWriter writer = new OutputStreamWriter(os);
for (int i = 0; i < 1000; i++)
writer.write("All work and no play makes Jack a dull boy. ");
writer.close();
}
}