| /* |
| * Copyright 2003-2004 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.commons.math; |
| |
| import junit.framework.TestCase; |
| |
| import java.io.ByteArrayOutputStream; |
| import java.io.PrintStream; |
| import java.io.PrintWriter; |
| |
| /** |
| * @version $Revision$ $Date$ |
| */ |
| public class MathExceptionTest extends TestCase { |
| /** |
| * |
| */ |
| public void testConstructor(){ |
| MathException ex = new MathException(); |
| assertNull(ex.getCause()); |
| assertNull(ex.getMessage()); |
| } |
| |
| /** |
| * |
| */ |
| public void testConstructorMessage(){ |
| String msg = "message"; |
| MathException ex = new MathException(msg); |
| assertNull(ex.getCause()); |
| assertEquals(msg, ex.getMessage()); |
| } |
| |
| /** |
| * |
| */ |
| public void testConstructorMessageCause(){ |
| String outMsg = "outer message"; |
| String inMsg = "inner message"; |
| Exception cause = new Exception(inMsg); |
| MathException ex = new MathException(outMsg, cause); |
| assertEquals(outMsg, ex.getMessage()); |
| assertEquals(cause, ex.getCause()); |
| } |
| |
| /** |
| * |
| */ |
| public void testConstructorCause(){ |
| String inMsg = "inner message"; |
| Exception cause = new Exception(inMsg); |
| MathException ex = new MathException(cause); |
| assertEquals(cause, ex.getCause()); |
| } |
| |
| /** |
| * Tests the printStackTrace() operation. |
| */ |
| public void testPrintStackTrace() { |
| String outMsg = "outer message"; |
| String inMsg = "inner message"; |
| MathException cause = new MathConfigurationException(inMsg); |
| MathException ex = new MathException(outMsg, cause); |
| 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() { |
| String outMsg = "outer message"; |
| String inMsg = "inner message"; |
| MathException cause = new MathConfigurationException(inMsg); |
| MathException ex = new MathException(outMsg, cause); |
| MathException image = (MathException) TestUtils.serializeAndRecover(ex); |
| |
| ByteArrayOutputStream baos = new ByteArrayOutputStream(); |
| PrintStream ps = new PrintStream(baos); |
| PrintWriter pw = new PrintWriter(ps, true); |
| ex.printStackTrace(ps); |
| String stack = baos.toString(); |
| |
| ByteArrayOutputStream baos2 = new ByteArrayOutputStream(); |
| PrintStream ps2 = new PrintStream(baos2); |
| PrintWriter pw2 = new PrintWriter(ps2, true); |
| 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) != -1); |
| assertTrue(stack2.indexOf("MathConfigurationException") != -1); |
| } |
| } |
| } |