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/*
*
* Derby - Class org.apache.derbyTesting.functionTests.util.CanonTestCase
*
* 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.derbyTesting.functionTests.util;
import java.io.BufferedReader;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.URL;
import java.security.AccessController;
import java.security.PrivilegedActionException;
import java.security.PrivilegedExceptionAction;
import org.apache.derbyTesting.junit.BaseJDBCTestCase;
/**
* Run a test that compares itself to a master (canon) file.
* This is used to support cannon based tests that ran
* under the old Derby test harness without having to convert
* them. It is not recommended for new tests. New test should
* use the JUnit assert mechanisms.
*
*/
abstract class CanonTestCase extends BaseJDBCTestCase {
final static String DEFAULT_ENCODING = "US-ASCII";
final String outputEncoding;
private ByteArrayOutputStream rawBytes;
CanonTestCase(String name) {
this(name, null);
}
CanonTestCase(String name, String encoding) {
super(name);
outputEncoding = (encoding == null) ? DEFAULT_ENCODING : encoding;
}
OutputStream getOutputStream() {
return rawBytes = new ByteArrayOutputStream(20 * 1024);
}
/**
* Compare the output to the canon provided.
*
* @param canon
* Name of canon as a resource.
*/
void compareCanon(String canon) throws Throwable {
rawBytes.flush();
rawBytes.close();
byte[] testRawBytes = rawBytes.toByteArray();
rawBytes = null;
BufferedReader cannonReader = null;
BufferedReader testOutput = null;
try {
URL canonURL = getTestResource(canon);
assertNotNull("No master file " + canon, canonURL);
InputStream canonStream = openTestResource(canonURL);
cannonReader = new BufferedReader(
new InputStreamReader(canonStream, outputEncoding));
testOutput = new BufferedReader(
new InputStreamReader(
new ByteArrayInputStream(testRawBytes),
outputEncoding));
for (int lineNumber = 1;; lineNumber++) {
String testLine = testOutput.readLine();
String canonLine = cannonReader.readLine();
if (canonLine == null && testLine == null)
break;
if (canonLine == null)
fail("More output from test than expected");
if (testLine == null)
fail("Less output from test than expected, stoped at line"
+ lineNumber);
assertEquals("Output at line " + lineNumber, canonLine,
testLine);
}
} catch (Throwable t) {
dumpForFail(testRawBytes);
throw t;
} finally {
if (cannonReader != null) {
try {
cannonReader.close();
} catch (IOException e) {
}
}
if (testOutput != null) {
try {
testOutput.close();
} catch (IOException e) {
}
}
}
}
/**
* Dump the output that did not compare correctly into the failure folder
* with the name this.getName() + ".out".
*
* @param rawOutput
* @throws IOException
* @throws PrivilegedActionException
*/
private void dumpForFail(byte[] rawOutput) throws IOException,
PrivilegedActionException {
File folder = getFailureFolder();
final File outFile = new File(folder, getName() + ".out");
OutputStream outStream = AccessController
.doPrivileged(new PrivilegedExceptionAction<OutputStream>() {
public OutputStream run() throws IOException {
return new FileOutputStream(outFile);
}
});
outStream.write(rawOutput);
outStream.flush();
outStream.close();
}
}
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