/*
* 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.
*/
/* $Id: DigestFilterTestCase.java 679326 2008-07-24 09:35:34Z vhennebert $ */
package org.apache.fop;
import java.io.IOException;
import java.io.StringReader;
import java.security.NoSuchAlgorithmException;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.parsers.SAXParserFactory;
import junit.framework.TestCase;
import org.apache.fop.util.DigestFilter;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import org.xml.sax.XMLReader;
/**
* Test case for digesting SAX filter.
*
*/
public class DigestFilterTestCase extends TestCase {
private SAXParserFactory parserFactory;
/** @see junit.framework.TestCase#setUp() */
protected void setUp() {
parserFactory = SAXParserFactory.newInstance();
parserFactory.setNamespaceAware(true);
}
private boolean compareDigest(byte[] a, byte[] b) {
if (a.length != b.length) {
return false;
}
for (int i = 0; i < a.length; i++) {
if (a[i] != b[i]) {
return false;
}
}
return true;
}
private String digestToString(byte[] digest) {
StringBuffer buffer = new StringBuffer(2 * digest.length);
for (int i = 0; i < digest.length; i++) {
int val = digest[i];
int hi = (val >> 4) & 0xF;
int lo = val & 0xF;
if (hi < 10) {
buffer.append((char) (hi + 0x30));
} else {
buffer.append((char) (hi + 0x61 - 10));
}
if (lo < 10) {
buffer.append((char) (lo + 0x30));
} else {
buffer.append((char) (lo + 0x61 - 10));
}
}
return buffer.toString();
}
private byte[] runTest(String input)
throws
NoSuchAlgorithmException,
ParserConfigurationException,
SAXException,
IOException {
XMLReader parser = parserFactory.newSAXParser().getXMLReader();
DigestFilter digestFilter = new DigestFilter("MD5");
digestFilter.setParent(parser);
digestFilter.setFeature("http://xml.org/sax/features/namespaces", true);
parser.setContentHandler(digestFilter);
InputSource inputSource = new InputSource(new StringReader(input));
parser.parse(inputSource);
return digestFilter.getDigestValue();
}
public final void testLineFeed()
throws
NoSuchAlgorithmException,
ParserConfigurationException,
SAXException,
IOException {
byte[] lfDigest = runTest("<a>\n</a>");
byte[] crlfDigest = runTest("<a>\r\n</a>");
assertTrue(
"LF: "
+ digestToString(lfDigest)
+ " CRLF: "
+ digestToString(crlfDigest),
compareDigest(lfDigest, crlfDigest));
}
public final void testAttributeOrder()
throws
NoSuchAlgorithmException,
ParserConfigurationException,
SAXException,
IOException {
byte[] sortDigest = runTest("<a a1='1' a2='2' a3='3'/>");
byte[] permutationDigest = runTest("<a a2='2' a3='3' a1='1'/>");
assertTrue(
"Sort: "
+ digestToString(sortDigest)
+ " permuted: "
+ digestToString(permutationDigest),
compareDigest(sortDigest, permutationDigest));
byte[] reverseDigest = runTest("<a a3='3' a2='2' a1='1'/>");
assertTrue(
"Sort: "
+ digestToString(sortDigest)
+ " permuted: "
+ digestToString(reverseDigest),
compareDigest(sortDigest, reverseDigest));
}
public final void testNamespacePrefix()
throws
NoSuchAlgorithmException,
ParserConfigurationException,
SAXException,
IOException {
byte[] prefix1Digest = runTest("<a:a xmlns:a='foo'/>");
byte[] prefix2Digest = runTest("<b:a xmlns:b='foo'/>");
assertTrue(
"prefix1: "
+ digestToString(prefix1Digest)
+ " prefix2: "
+ digestToString(prefix2Digest),
compareDigest(prefix1Digest, prefix2Digest));
}
}