/*
* 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.commons.math;
import junit.framework.TestCase;
import java.io.ByteArrayOutputStream;
import java.io.PrintStream;
import java.io.PrintWriter;
import java.util.Locale;
import org.apache.commons.math.exception.util.DummyLocalizable;
import org.apache.commons.math.exception.util.Localizable;
import org.apache.commons.math.exception.util.LocalizedFormats;
/**
* @version $Revision: 1035475 $ $Date: 2010-11-15 23:39:25 +0100 (lun. 15 nov. 2010) $
*/
public class MathExceptionTest extends TestCase {
public void testConstructor(){
MathException ex = new MathException();
assertNull(ex.getCause());
assertEquals("", ex.getMessage());
assertEquals("", ex.getMessage(Locale.FRENCH));
}
public void testConstructorPatternArguments(){
LocalizedFormats pattern = LocalizedFormats.ROTATION_MATRIX_DIMENSIONS;
Object[] arguments = { Integer.valueOf(6), Integer.valueOf(4) };
MathException ex = new MathException(pattern, arguments);
assertNull(ex.getCause());
assertEquals(pattern, ex.getGeneralPattern());
assertEquals(arguments.length, ex.getArguments().length);
for (int i = 0; i < arguments.length; ++i) {
assertEquals(arguments[i], ex.getArguments()[i]);
}
assertFalse(pattern.equals(ex.getMessage()));
assertFalse(ex.getMessage().equals(ex.getMessage(Locale.FRENCH)));
}
public void testConstructorCause(){
String inMsg = "inner message";
Exception cause = new Exception(inMsg);
MathException ex = new MathException(cause);
assertEquals(cause, ex.getCause());
}
public void testConstructorPatternArgumentsCause(){
LocalizedFormats pattern = LocalizedFormats.ROTATION_MATRIX_DIMENSIONS;
Object[] arguments = { Integer.valueOf(6), Integer.valueOf(4) };
String inMsg = "inner message";
Exception cause = new Exception(inMsg);
MathException ex = new MathException(cause, pattern, arguments);
assertEquals(cause, ex.getCause());
assertEquals(pattern, ex.getGeneralPattern());
assertEquals(arguments.length, ex.getArguments().length);
for (int i = 0; i < arguments.length; ++i) {
assertEquals(arguments[i], ex.getArguments()[i]);
}
assertFalse(pattern.equals(ex.getMessage()));
assertFalse(ex.getMessage().equals(ex.getMessage(Locale.FRENCH)));
}
/**
* Tests the printStackTrace() operation.
*/
public void testPrintStackTrace() {
Localizable outMsg = new DummyLocalizable("outer message");
Localizable inMsg = new DummyLocalizable("inner message");
MathException cause = new MathConfigurationException(inMsg);
MathException ex = new MathException(cause, outMsg);
ByteArrayOutputStream baos = new ByteArrayOutputStream();
PrintStream ps = new PrintStream(baos);
ex.printStackTrace(ps);
String stack = baos.toString();
String outerMsg = "org.apache.commons.math.MathException: outer message";
String innerMsg = "Caused by: " +
"org.apache.commons.math.MathConfigurationException: inner message";
assertTrue(stack.startsWith(outerMsg));
assertTrue(stack.indexOf(innerMsg) > 0);
PrintWriter pw = new PrintWriter(ps, true);
ex.printStackTrace(pw);
stack = baos.toString();
assertTrue(stack.startsWith(outerMsg));
assertTrue(stack.indexOf(innerMsg) > 0);
}
/**
* Test serialization
*/
public void testSerialization() {
Localizable outMsg = new DummyLocalizable("outer message");
Localizable inMsg = new DummyLocalizable("inner message");
MathException cause = new MathConfigurationException(inMsg);
MathException ex = new MathException(cause, outMsg);
MathException image = (MathException) TestUtils.serializeAndRecover(ex);
ByteArrayOutputStream baos = new ByteArrayOutputStream();
PrintStream ps = new PrintStream(baos);
ex.printStackTrace(ps);
String stack = baos.toString();
ByteArrayOutputStream baos2 = new ByteArrayOutputStream();
PrintStream ps2 = new PrintStream(baos2);
image.printStackTrace(ps2);
String stack2 = baos2.toString();
// See if JDK supports nested exceptions. If not, stack trace of
// inner exception will not be serialized
boolean jdkSupportsNesting = false;
try {
Throwable.class.getDeclaredMethod("getCause", new Class[0]);
jdkSupportsNesting = true;
} catch (NoSuchMethodException e) {
jdkSupportsNesting = false;
}
if (jdkSupportsNesting) {
assertEquals(stack, stack2);
} else {
assertTrue(stack2.indexOf(inMsg.getSourceString()) != -1);
assertTrue(stack2.indexOf("MathConfigurationException") != -1);
}
}
}