src/test/org/apache/commons/lang/exception/AbstractNestableTestCase.java - commons-lang - Git at Google

 /*
  * 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.lang.exception;

 import java.io.ByteArrayOutputStream;
 import java.io.PrintStream;
 import java.io.PrintWriter;

 import junit.framework.TestCase;
 /**
  * Tests implementations of the org.apache.commons.lang.exception.Nestable
  * interface.
  *
  * @author <a href="mailto:steven@caswell.name">Steven Caswell</a>
  * @version $Id$
  */
 public abstract class AbstractNestableTestCase extends TestCase
 {

     /**
      * Constructs an instance of
      * <code>AbstractNestableTestCase</code>.
      *
      * @param name the test name
      */
     public AbstractNestableTestCase(String name)
     {
         super(name);
     }

     /**
      * Tests the getCause() operation.
      */
     public void testGetCause()
     {
         Nestable ne1 = getNestable();
         assertNull("nestable exception() cause is null", ne1.getCause());

         Nestable ne2 = getNestable("ne2");
         assertNull("nestable exception(\"ne2\") cause is null", ne2.getCause());

         Nestable ne3 = getNestable(getThrowable("ne3 exception"));
         assertNotNull("nestable exception(Throwable(\"ne3 exception\") cause is not null",
             ne3.getCause());
         assertTrue("nestable exception(Throwable(\"ne3 exception\") cause message == ne3 exception",
             ne3.getCause().getMessage().equals("ne3 exception"));

         Nestable ne4 = getNestable("ne4", getThrowable("ne4 exception"));
         assertNotNull("nestable exception(\"ne4\", Throwable(\"ne4 exception\") cause is not null",
             ne4.getCause());

         Nestable ne5 = getNestable("ne5", (Throwable) null);
         assertNull("nestable exception(\"ne5\", null) cause is null",
             ne5.getCause());

         Nestable ne6 = getNestable(null, getThrowable("ne6 exception"));
         assertNotNull("nestable exception(null, Throwable(\"ne6 exception\") cause is not null",
             ne6.getCause());
     }

     /**
      * Tests the getThrowableCount() operation.
      */
     public void testGetThrowableCount()
     {
         Nestable ne1 = getNestable();
         assertEquals("ne1 throwable count", 1, ne1.getThrowableCount());

         Nestable ne2 = getNestable("ne2");
         assertEquals("ne2 throwable count", 1, ne2.getThrowableCount());

         Nestable ne3 = getNestable(getThrowable("ne3 exception"));
         assertEquals("ne3 throwable count", 2, ne3.getThrowableCount());

         Nestable ne4 = getNestable("ne4", getThrowable("ne4 exception"));
         assertEquals("ne4 throwable count", 2, ne4.getThrowableCount());

         Nestable ne5 = getNestable("ne5", (Throwable) null);
         assertEquals("ne 5 throwable count", 1, ne5.getThrowableCount());

         Nestable ne6 = getNestable(null, getThrowable("ne6 exception"));
         assertEquals("ne 6 throwable count", 2, ne6.getThrowableCount());

         Nestable ne7 = getNestable("ne7o", getNestable("ne7i", getThrowable("ne7 exception")));
         assertEquals("ne 7 throwable count", 3, ne7.getThrowableCount());

         Nestable ne8 = getNestable("level 1", getNestable("level 2", getNestable(getNestable("level 4", getThrowable("level 5")))));
         assertEquals("ne 8 throwable count", 5, ne8.getThrowableCount());
     }

     /**
      * Tests the getMessage() operation.
      */
     public void testGetMessage()
     {
         Nestable ne1 = getNestable();
         assertNull("nestable exception() message is null", ne1.getMessage());

         Nestable ne2 = getNestable("ne2");
         assertNotNull("nestable exception(\"ne2\") message is not null", ne2.getMessage());
         assertEquals("nestable exception(\"ne2\") message == ne2", ne2.getMessage(), "ne2");

         Nestable ne3 = getNestable(getThrowable("ne3 exception"));
         assertNotNull("nestable exception(Throwable(\"ne3 exception\") message is not null",
             ne3.getMessage());
         assertEquals("nestable exception(Throwable(\"ne3 exception\") message equals cause.toString()",
             ne3.getMessage(), ne3.getCause().toString());

         Nestable ne4 = getNestable("ne4", getThrowable("ne4 exception"));
         assertNotNull("nestable exception(\"ne4\", Throwable(\"ne4 exception\") message is not null",
             ne4.getMessage());
         assertEquals("nestable exception(\"ne4\", Throwable(\"ne4 exception\") message == ne4",
             ne4.getMessage(), "ne4");

         Nestable ne5 = getNestable("ne5", (Throwable) null);
         assertNotNull("nestable exception(\"ne5\", null) message is not null",
             ne5.getMessage());
         assertEquals("nestable exception(\"ne5\", null) message == ne5",
             ne5.getMessage(), "ne5");

         Throwable t6 = getThrowable("ne6 exception");
         Nestable ne6 = getNestable(null, t6);
         assertNotNull("nestable exception(null, Throwable(\"ne6 exception\") message is not null",
             ne6.getMessage());
         assertEquals("nestable exception(null, Throwable(\"ne6 exception\") message equals cause.toString()",
             ne6.getMessage(), ne6.getCause().toString());

         Nestable ne7 = getNestable("ne7o", getNestable("ne7i", getThrowable("ne7 exception")));
         assertEquals("nestable exception(\"ne7o\", getNestable(\"ne7i\", Throwable(\"ne7 exception\"))) message is ne7o: ne7i: ne7 exception",
             ne7.getMessage(), "ne7o");

         Nestable ne8 = getNestable();
         assertNull("nestable exception() message is null",
             ne8.getMessage());

     }

     /**
      * Tests the getMessage(int) operation.
      */
     public void testGetMessageI()
     {
         String[] msgs = new String[5];
         msgs[0] = "level 1";
         msgs[1] = "level 2";
         msgs[2] = null;
         msgs[3] = "level 4";
         msgs[4] = "level 5";
         Nestable ne = getNestable(msgs[0], getNestable(msgs[1], getNestable(getNestable(msgs[3], getThrowable(msgs[4])))));
         for(int i = 0; i < msgs.length; i++)
         {
             assertEquals("message " + i, msgs[i], ne.getMessage(i));
         }

         // Test for index out of bounds
         try
         {
             String msg = ne.getMessage(-1);
             fail("getMessage(-1) should have thrown IndexOutOfBoundsException");
         }
         catch(IndexOutOfBoundsException ioode)
         {
         }
         try
         {
             String msg = ne.getMessage(msgs.length + 100);
             fail("getMessage(999) should have thrown IndexOutOfBoundsException");
         }
         catch(IndexOutOfBoundsException ioode)
         {
         }
     }

     /**
      * Tests the getMessages() operation.
      */
     public void testGetMessages()
     {
         String[] msgs = new String[5];
         msgs[0] = "level 1";
         msgs[1] = "level 2";
         msgs[2] = null;
         msgs[3] = "level 4";
         msgs[4] = "level 5";
         Nestable ne = getNestable(msgs[0], getNestable(msgs[1], getNestable(getNestable(msgs[3], getThrowable(msgs[4])))));
         String[] nMsgs = ne.getMessages();
         assertEquals("messages length", msgs.length, nMsgs.length);
         for(int i = 0; i < nMsgs.length; i++)
         {
             assertEquals("message " + i, msgs[i], nMsgs[i]);
         }
     }

     /**
      * Tests the getThrowable(int) operation.
      */
     public void testGetThrowableI()
     {
         Nestable n = null;
         String msgs[] = null;
         Class[] throwables = null;

         msgs = new String[2];
         msgs[0] = null;
         msgs[1] = "level 2";
         throwables = new Class[2];
         throwables[0] = getTester1Class();
         throwables[1] = getThrowableClass();
         n = getTester1(getThrowable(msgs[1]));
         doNestableExceptionGetThrowableI(n, throwables, msgs);

         msgs = new String[5];
         msgs[0] = "level 1";
         msgs[1] = "level 2";
         msgs[2] = null;
         msgs[3] = "level 4";
         msgs[4] = "level 5";
         throwables = new Class[5];
         throwables[0] = getTester1Class();
         throwables[1] = getTester2Class();
         throwables[2] = getTester1Class();
         throwables[3] = getTester2Class();
         throwables[4] = getThrowableClass();
         n = getTester1(msgs[0], getTester2(msgs[1], getTester1(getTester2(msgs[3], getThrowable(msgs[4])))));
         doNestableExceptionGetThrowableI(n, throwables, msgs);
     }

     private void doNestableExceptionGetThrowableI(Nestable n, Class[] classes, String[] msgs)
     {
         Throwable t = null;
         String msg = null;

         for(int i = 0; i < classes.length; i++)
         {
             t = n.getThrowable(i);
             assertEquals("throwable class", classes[i], t.getClass());
             if(Nestable.class.isInstance(t))
             {
                 msg = ((Nestable) t).getMessage(0);
             }
             else
             {
                 msg = t.getMessage();
             }
             assertEquals("throwable message", msgs[i], msg);
         }

         // Test for index out of bounds
         try
         {
             t = n.getThrowable(-1);
             fail("getThrowable(-1) should have thrown IndexOutOfBoundsException");
         }
         catch(IndexOutOfBoundsException ioobe)
         {
         }
         try
         {
             t = n.getThrowable(999);
             fail("getThrowable(999) should have thrown IndexOutOfBoundsException");
         }
         catch(IndexOutOfBoundsException ioobe)
         {
         }
     }

     /**
      * Tests the getThrowables() operation.
      */
     public void testGetThrowables()
     {
         Nestable n = null;
         String msgs[] = null;
         Class[] throwables = null;

         msgs = new String[2];
         msgs[0] = null;
         msgs[1] = "level 2";
         throwables = new Class[2];
         throwables[0] = getTester1Class();
         throwables[1] = getThrowableClass();
         n = getTester1(getThrowable(msgs[1]));
         doNestableExceptionGetThrowables(n, throwables, msgs);

         msgs = new String[5];
         msgs[0] = "level 1";
         msgs[1] = "level 2";
         msgs[2] = null;
         msgs[3] = "level 4";
         msgs[4] = "level 5";
         throwables = new Class[5];
         throwables[0] = getTester1Class();
         throwables[1] = getTester2Class();
         throwables[2] = getTester1Class();
         throwables[3] = getTester2Class();
         throwables[4] = getThrowableClass();
         n = getTester1(msgs[0], getTester2(msgs[1], getTester1(getTester2(msgs[3], getThrowable(msgs[4])))));
         doNestableExceptionGetThrowables(n, throwables, msgs);
     }

     private void doNestableExceptionGetThrowables(Nestable n, Class[] classes, String[] msgs)
     {
         String msg = null;

         Throwable throwables[] = n.getThrowables();
         assertEquals("throwables length", classes.length, throwables.length);
         for(int i = 0; i < classes.length; i++)
         {
             assertEquals("throwable class", classes[i], throwables[i].getClass());
             Throwable t = throwables[i];
             if(Nestable.class.isInstance(t))
             {
                 msg = ((Nestable) t).getMessage(0);
             }
             else
             {
                 msg = t.getMessage();
             }
             assertEquals("throwable message", msgs[i], msg);
         }
     }

     /**
      * Tests the indexOfThrowable() operation.
      */
     public void testIndexOfThrowable()
     {
         Nestable n = null;
         String msgs[] = null;
         Class[] throwables = null;

         msgs = new String[5];
         msgs[0] = "level 1";
         msgs[1] = "level 2";
         msgs[2] = null;
         msgs[3] = "level 4";
         msgs[4] = "level 5";
         throwables = new Class[5];
         throwables[0] = getTester1Class();
         throwables[1] = getTester2Class();
         throwables[2] = getTester1Class();
         throwables[3] = getTester2Class();
         throwables[4] = getThrowableClass();
         int[] indexes = {0, 1, 0, 1, 4};
         n = getTester1(msgs[0], getTester2(msgs[1], getTester1(getTester2(msgs[3], getThrowable(msgs[4])))));
         for(int i = 0; i < throwables.length; i++)
         {
             doNestableExceptionIndexOfThrowable(n, throwables[i], indexes[i], msgs[indexes[i]]);
         }
         doNestableExceptionIndexOfThrowable(n, getBaseThrowableClass(), 0, msgs[0]);
         doNestableExceptionIndexOfThrowable(n, java.util.Date.class, -1, null);
         doNestableExceptionIndexOfThrowable(n, null, -1, null);
     }

     private void doNestableExceptionIndexOfThrowable(Nestable n, Class type, int expectedIndex, String expectedMsg)
     {
         Throwable t = null;

         int index = n.indexOfThrowable(type);
         assertEquals("index of throwable " + (type == null ? "null" : type.getName()), expectedIndex, index);
         if(expectedIndex > -1)
         {
             t = n.getThrowable(index);
             if(expectedMsg != null)
             {
                 String msg = null;
                 if(Nestable.class.isInstance(t))
                 {
                     msg = ((Nestable) t).getMessage(0);
                 }
                 else
                 {
                     msg = t.getMessage();
                 }
                 assertEquals("message of indexed throwable", expectedMsg, msg);
             }
         }
     }

     /**
      * Tests the indexOfThrowable(int) operation.
      */
     public void testIndexOfThrowableI()
     {
         Nestable n = null;
         String msgs[] = null;
         Class[] throwables = null;

         msgs = new String[5];
         msgs[0] = "level 1";
         msgs[1] = "level 2";
         msgs[2] = null;
         msgs[3] = "level 4";
         msgs[4] = "level 5";
         throwables = new Class[5];
         throwables[0] = getTester1Class();
         throwables[1] = getTester2Class();
         throwables[2] = getTester1Class();
         throwables[3] = getTester2Class();
         throwables[4] = getThrowableClass();
         int[] indexes = {0, 1, 0, 1, 4};
         n = getTester1(msgs[0], getTester2(msgs[1], getTester1(getTester2(msgs[3], getThrowable(msgs[4])))));
         for(int i = 0; i < throwables.length; i++)
         {
             doNestableExceptionIndexOfThrowableI(n, throwables[i], 0, indexes[i], msgs[indexes[i]]);
         }
         doNestableExceptionIndexOfThrowableI(n, getTester2Class(), 2, 3, msgs[3]);
         doNestableExceptionIndexOfThrowableI(n, getTester1Class(), 1, 2, msgs[2]);
         doNestableExceptionIndexOfThrowableI(n, getTester1Class(), 3, -1, null);
         doNestableExceptionIndexOfThrowableI(n, getTester1Class(), 4, -1, null);
         doNestableExceptionIndexOfThrowableI(n, getThrowableClass(), 2, 4, msgs[4]);
         doNestableExceptionIndexOfThrowableI(n, java.util.Date.class, 0, -1, null);
         doNestableExceptionIndexOfThrowableI(n, null, 0, -1, null);

         // Test for index out of bounds
         try
         {
             int index = n.indexOfThrowable(getTester1Class(), -1);
             fail("method should have thrown IndexOutOfBoundsException");
         }
         catch(IndexOutOfBoundsException iooob)
         {
         }
         try
         {
             int index = n.indexOfThrowable(getTester1Class(), 5);
             fail("method should have thrown IndexOutOfBoundsException");
         }
         catch(IndexOutOfBoundsException iooob)
         {
         }

     }

     private void doNestableExceptionIndexOfThrowableI(Nestable n, Class type, int fromIndex, int expectedIndex, String expectedMsg)
     {
         Throwable t = null;

         int index = n.indexOfThrowable(type, fromIndex);
         assertEquals("index of throwable " + (type == null ? "null" : type.getName()), expectedIndex, index);
         if(expectedIndex > -1)
         {
             t = n.getThrowable(index);
             if(expectedMsg != null)
             {
                 String msg = null;
                 if(Nestable.class.isInstance(t))
                 {
                     msg = ((Nestable) t).getMessage(0);
                 }
                 else
                 {
                     msg = t.getMessage();
                 }
                 assertEquals("message of indexed throwable", expectedMsg, msg);
             }
         }

     }

     /**
      * Tests the printPartialStackTrace() operation.
      */
     public void testPrintPartialStackTrace()
     {
         Nestable ne9 = getNestable("ne9", getThrowable("ne9 exception"));
         ByteArrayOutputStream baos2 = new ByteArrayOutputStream();
         PrintStream ps2 = new PrintStream(baos2);
         PrintWriter pw2 = new PrintWriter(ps2, true);
         ne9.printPartialStackTrace(pw2);
         String stack2 = baos2.toString();
         String startsWith = ne9.getClass().getName() + ": ne9";
         assertTrue("stack trace startsWith == " + startsWith,
             stack2.startsWith(startsWith));
         assertEquals("stack trace indexOf rethrown == -1",
             stack2.indexOf("rethrown"), -1);
     }

     /**
      * Tests the printStackTrace() operation.
      */
     public void testPrintStackTrace()
     {
         Nestable ne8 = getNestable("ne8", getThrowable("ne8 exception"));
         ByteArrayOutputStream baos1 = new ByteArrayOutputStream();
         PrintStream ps1 = new PrintStream(baos1);
         PrintWriter pw1 = new PrintWriter(ps1, true);
         ne8.printStackTrace(pw1);
         String stack1 = baos1.toString();
         String startsWith = ne8.getClass().getName() + ": ne8";
         assertTrue("stack trace startsWith == " + startsWith,
             stack1.startsWith(startsWith));
         String indexOf = getThrowableClass().getName() + ": ne8 exception";
         assertTrue("stack trace indexOf " + indexOf + " > -1",
             stack1.indexOf(indexOf) > -1);
     }

     /**
      * Returns an instance of the <code>Nestable</code> implementation being
      * tested.
      *
      * @return the instance
      */
     public abstract Nestable getNestable();

     /**
      * Returns an instance of the <code>Nestable</code> implementation being
      * tested.
      *
      * @param n <code>Nestable</code> argument to be provided to the instance
      * constructor
      * @return the instance
      */
     public abstract Nestable getNestable(Nestable n);

     /**
      * Returns an instance of the <code>Nestable</code> implementation being
      * tested.
      *
      * @param msg <code>String</code> argument to be provided to the instance
      * constructor
      * @return the instance
      */
     public abstract Nestable getNestable(String msg);

     /**
      * Returns an instance of the <code>Nestable</code> implementation being
      * tested.
      *
      * @param msg <code>String</code> argument to be provided to the instance
      * constructor
      * @param n <code>Nestable</code> argument to be provided to the instance
      * constructor
      * @return the instance
      */
     public abstract Nestable getNestable(String msg, Nestable n);

     /**
      * Returns an instance of the <code>Nestable</code> implementation being
      * tested.
      *
      * @param msg <code>String</code> argument to be provided to the instance
      * constructor
      * @param t <code>Throwable</code> argument to be provided to the instance
      * constructor
      * @return the instance
      */
     public abstract Nestable getNestable(String msg, Throwable t);

     /**
      * Returns an instance of the <code>Nestable</code> implementation being
      * tested.
      *
      * @param t <code>Throwable</code> argument to be provided to the instance
      * constructor
      * @return the instance
      */
     public abstract Nestable getNestable(Throwable t);

     /**
      * Returns an instance of a <code>Throwable</code> to be used in
      * constructing instances of the <code>Nestable</code> implementation being
      * tested.
      *
      * @param msg <code>String</code> argument to be provided to the instance
      * constructor
      * @return the instance
      */
     public abstract Throwable getThrowable(String msg);

     /**
      * Returns an instance of one tester <code>Nestable</code> implementation.
      *
      * @param n <code>Nestable</code> argument to be provided to the instance
      * constructor
      * @return the instance
      */
     public abstract Nestable getTester1(Nestable n);

     /**
      * Returns an instance of one tester <code>Nestable</code> implementation.
      *
      * @param t <code>Throwable</code> argument to be provided to the instance
      * constructor
      * @return the instance
      */
     public abstract Nestable getTester1(Throwable t);

     /**
      * Returns an instance of one tester <code>Nestable</code> implementation.
      *
      * @param msg <code>String</code> argument to be provided to the instance
      * constructor
      * @param n <code>Nestable</code> argument to be provided to the instance
      * constructor
      * @return the instance
      */
     public abstract Nestable getTester1(String msg, Nestable n);

     /**
      * Returns an instance of one tester <code>Nestable</code> implementation.
      *
      * @param msg <code>String</code> argument to be provided to the instance
      * constructor
      * @param t <code>Throwable</code> argument to be provided to the instance
      * constructor
      * @return the instance
      */
     public abstract Nestable getTester1(String msg, Throwable t);

     /**
      * Returns an instance of a second tester <code>Nestable</code>
      * implementation.
      *
      * @param msg <code>String</code> argument to be provided to the instance
      * constructor
      * @param n <code>Nestable</code> argument to be provided to the instance
      * constructor
      * @return the instance
      */
     public abstract Nestable getTester2(String msg, Nestable n);

     /**
      * Returns an instance of a second tester <code>Nestable</code>
      * implementation.
      *
      * @param msg <code>String</code> argument to be provided to the instance
      * constructor
      * @param t <code>Throwable</code> argument to be provided to the instance
      * constructor
      * @return the instance
      */
     public abstract Nestable getTester2(String msg, Throwable t);

     /**
      * Returns the class of the first tester <code>Nestable</code>
      * implementation.
      *
      * @return the class
      */
     public abstract Class getTester1Class();

     /**
      * Returns the class of the second tester <code>Nestable</code>
      * implementation.
      *
      * @return the class
      */
     public abstract Class getTester2Class();

     /**
      * Returns the class of the <code>Throwable</code> used in constructing
      * instances of the <code>Nestable</code> implementation being tested.
      *
      * @return the class
      */
     public abstract Class getThrowableClass();

     /**
      * Returns the base class being used, typically Error, Eception or RuntimeException.
      *
      * @return the class
      */
     public abstract Class getBaseThrowableClass();

 }
	/*
	* 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.lang.exception;

	import java.io.ByteArrayOutputStream;
	import java.io.PrintStream;
	import java.io.PrintWriter;

	import junit.framework.TestCase;
	/**
	* Tests implementations of the org.apache.commons.lang.exception.Nestable
	* interface.
	*
	* @author <a href="mailto:steven@caswell.name">Steven Caswell</a>
	* @version $Id$
	*/
	public abstract class AbstractNestableTestCase extends TestCase
	{

	/**
	* Constructs an instance of
	* <code>AbstractNestableTestCase</code>.
	*
	* @param name the test name
	*/
	public AbstractNestableTestCase(String name)
	{
	super(name);
	}

	/**
	* Tests the getCause() operation.
	*/
	public void testGetCause()
	{
	Nestable ne1 = getNestable();
	assertNull("nestable exception() cause is null", ne1.getCause());

	Nestable ne2 = getNestable("ne2");
	assertNull("nestable exception(\"ne2\") cause is null", ne2.getCause());

	Nestable ne3 = getNestable(getThrowable("ne3 exception"));
	assertNotNull("nestable exception(Throwable(\"ne3 exception\") cause is not null",
	ne3.getCause());
	assertTrue("nestable exception(Throwable(\"ne3 exception\") cause message == ne3 exception",
	ne3.getCause().getMessage().equals("ne3 exception"));

	Nestable ne4 = getNestable("ne4", getThrowable("ne4 exception"));
	assertNotNull("nestable exception(\"ne4\", Throwable(\"ne4 exception\") cause is not null",
	ne4.getCause());

	Nestable ne5 = getNestable("ne5", (Throwable) null);
	assertNull("nestable exception(\"ne5\", null) cause is null",
	ne5.getCause());

	Nestable ne6 = getNestable(null, getThrowable("ne6 exception"));
	assertNotNull("nestable exception(null, Throwable(\"ne6 exception\") cause is not null",
	ne6.getCause());
	}

	/**
	* Tests the getThrowableCount() operation.
	*/
	public void testGetThrowableCount()
	{
	Nestable ne1 = getNestable();
	assertEquals("ne1 throwable count", 1, ne1.getThrowableCount());

	Nestable ne2 = getNestable("ne2");
	assertEquals("ne2 throwable count", 1, ne2.getThrowableCount());

	Nestable ne3 = getNestable(getThrowable("ne3 exception"));
	assertEquals("ne3 throwable count", 2, ne3.getThrowableCount());

	Nestable ne4 = getNestable("ne4", getThrowable("ne4 exception"));
	assertEquals("ne4 throwable count", 2, ne4.getThrowableCount());

	Nestable ne5 = getNestable("ne5", (Throwable) null);
	assertEquals("ne 5 throwable count", 1, ne5.getThrowableCount());

	Nestable ne6 = getNestable(null, getThrowable("ne6 exception"));
	assertEquals("ne 6 throwable count", 2, ne6.getThrowableCount());

	Nestable ne7 = getNestable("ne7o", getNestable("ne7i", getThrowable("ne7 exception")));
	assertEquals("ne 7 throwable count", 3, ne7.getThrowableCount());

	Nestable ne8 = getNestable("level 1", getNestable("level 2", getNestable(getNestable("level 4", getThrowable("level 5")))));
	assertEquals("ne 8 throwable count", 5, ne8.getThrowableCount());
	}

	/**
	* Tests the getMessage() operation.
	*/
	public void testGetMessage()
	{
	Nestable ne1 = getNestable();
	assertNull("nestable exception() message is null", ne1.getMessage());

	Nestable ne2 = getNestable("ne2");
	assertNotNull("nestable exception(\"ne2\") message is not null", ne2.getMessage());
	assertEquals("nestable exception(\"ne2\") message == ne2", ne2.getMessage(), "ne2");

	Nestable ne3 = getNestable(getThrowable("ne3 exception"));
	assertNotNull("nestable exception(Throwable(\"ne3 exception\") message is not null",
	ne3.getMessage());
	assertEquals("nestable exception(Throwable(\"ne3 exception\") message equals cause.toString()",
	ne3.getMessage(), ne3.getCause().toString());

	Nestable ne4 = getNestable("ne4", getThrowable("ne4 exception"));
	assertNotNull("nestable exception(\"ne4\", Throwable(\"ne4 exception\") message is not null",
	ne4.getMessage());
	assertEquals("nestable exception(\"ne4\", Throwable(\"ne4 exception\") message == ne4",
	ne4.getMessage(), "ne4");

	Nestable ne5 = getNestable("ne5", (Throwable) null);
	assertNotNull("nestable exception(\"ne5\", null) message is not null",
	ne5.getMessage());
	assertEquals("nestable exception(\"ne5\", null) message == ne5",
	ne5.getMessage(), "ne5");

	Throwable t6 = getThrowable("ne6 exception");
	Nestable ne6 = getNestable(null, t6);
	assertNotNull("nestable exception(null, Throwable(\"ne6 exception\") message is not null",
	ne6.getMessage());
	assertEquals("nestable exception(null, Throwable(\"ne6 exception\") message equals cause.toString()",
	ne6.getMessage(), ne6.getCause().toString());

	Nestable ne7 = getNestable("ne7o", getNestable("ne7i", getThrowable("ne7 exception")));
	assertEquals("nestable exception(\"ne7o\", getNestable(\"ne7i\", Throwable(\"ne7 exception\"))) message is ne7o: ne7i: ne7 exception",
	ne7.getMessage(), "ne7o");

	Nestable ne8 = getNestable();
	assertNull("nestable exception() message is null",
	ne8.getMessage());

	}

	/**
	* Tests the getMessage(int) operation.
	*/
	public void testGetMessageI()
	{
	String[] msgs = new String[5];
	msgs[0] = "level 1";
	msgs[1] = "level 2";
	msgs[2] = null;
	msgs[3] = "level 4";
	msgs[4] = "level 5";
	Nestable ne = getNestable(msgs[0], getNestable(msgs[1], getNestable(getNestable(msgs[3], getThrowable(msgs[4])))));
	for(int i = 0; i < msgs.length; i++)
	{
	assertEquals("message " + i, msgs[i], ne.getMessage(i));
	}

	// Test for index out of bounds
	try
	{
	String msg = ne.getMessage(-1);
	fail("getMessage(-1) should have thrown IndexOutOfBoundsException");
	}
	catch(IndexOutOfBoundsException ioode)
	{
	}
	try
	{
	String msg = ne.getMessage(msgs.length + 100);
	fail("getMessage(999) should have thrown IndexOutOfBoundsException");
	}
	catch(IndexOutOfBoundsException ioode)
	{
	}
	}

	/**
	* Tests the getMessages() operation.
	*/
	public void testGetMessages()
	{
	String[] msgs = new String[5];
	msgs[0] = "level 1";
	msgs[1] = "level 2";
	msgs[2] = null;
	msgs[3] = "level 4";
	msgs[4] = "level 5";
	Nestable ne = getNestable(msgs[0], getNestable(msgs[1], getNestable(getNestable(msgs[3], getThrowable(msgs[4])))));
	String[] nMsgs = ne.getMessages();
	assertEquals("messages length", msgs.length, nMsgs.length);
	for(int i = 0; i < nMsgs.length; i++)
	{
	assertEquals("message " + i, msgs[i], nMsgs[i]);
	}
	}

	/**
	* Tests the getThrowable(int) operation.
	*/
	public void testGetThrowableI()
	{
	Nestable n = null;
	String msgs[] = null;
	Class[] throwables = null;

	msgs = new String[2];
	msgs[0] = null;
	msgs[1] = "level 2";
	throwables = new Class[2];
	throwables[0] = getTester1Class();
	throwables[1] = getThrowableClass();
	n = getTester1(getThrowable(msgs[1]));
	doNestableExceptionGetThrowableI(n, throwables, msgs);

	msgs = new String[5];
	msgs[0] = "level 1";
	msgs[1] = "level 2";
	msgs[2] = null;
	msgs[3] = "level 4";
	msgs[4] = "level 5";
	throwables = new Class[5];
	throwables[0] = getTester1Class();
	throwables[1] = getTester2Class();
	throwables[2] = getTester1Class();
	throwables[3] = getTester2Class();
	throwables[4] = getThrowableClass();
	n = getTester1(msgs[0], getTester2(msgs[1], getTester1(getTester2(msgs[3], getThrowable(msgs[4])))));
	doNestableExceptionGetThrowableI(n, throwables, msgs);
	}

	private void doNestableExceptionGetThrowableI(Nestable n, Class[] classes, String[] msgs)
	{
	Throwable t = null;
	String msg = null;

	for(int i = 0; i < classes.length; i++)
	{
	t = n.getThrowable(i);
	assertEquals("throwable class", classes[i], t.getClass());
	if(Nestable.class.isInstance(t))
	{
	msg = ((Nestable) t).getMessage(0);
	}
	else
	{
	msg = t.getMessage();
	}
	assertEquals("throwable message", msgs[i], msg);
	}

	// Test for index out of bounds
	try
	{
	t = n.getThrowable(-1);
	fail("getThrowable(-1) should have thrown IndexOutOfBoundsException");
	}
	catch(IndexOutOfBoundsException ioobe)
	{
	}
	try
	{
	t = n.getThrowable(999);
	fail("getThrowable(999) should have thrown IndexOutOfBoundsException");
	}
	catch(IndexOutOfBoundsException ioobe)
	{
	}
	}

	/**
	* Tests the getThrowables() operation.
	*/
	public void testGetThrowables()
	{
	Nestable n = null;
	String msgs[] = null;
	Class[] throwables = null;

	msgs = new String[2];
	msgs[0] = null;
	msgs[1] = "level 2";
	throwables = new Class[2];
	throwables[0] = getTester1Class();
	throwables[1] = getThrowableClass();
	n = getTester1(getThrowable(msgs[1]));
	doNestableExceptionGetThrowables(n, throwables, msgs);

	msgs = new String[5];
	msgs[0] = "level 1";
	msgs[1] = "level 2";
	msgs[2] = null;
	msgs[3] = "level 4";
	msgs[4] = "level 5";
	throwables = new Class[5];
	throwables[0] = getTester1Class();
	throwables[1] = getTester2Class();
	throwables[2] = getTester1Class();
	throwables[3] = getTester2Class();
	throwables[4] = getThrowableClass();
	n = getTester1(msgs[0], getTester2(msgs[1], getTester1(getTester2(msgs[3], getThrowable(msgs[4])))));
	doNestableExceptionGetThrowables(n, throwables, msgs);
	}

	private void doNestableExceptionGetThrowables(Nestable n, Class[] classes, String[] msgs)
	{
	String msg = null;

	Throwable throwables[] = n.getThrowables();
	assertEquals("throwables length", classes.length, throwables.length);
	for(int i = 0; i < classes.length; i++)
	{
	assertEquals("throwable class", classes[i], throwables[i].getClass());
	Throwable t = throwables[i];
	if(Nestable.class.isInstance(t))
	{
	msg = ((Nestable) t).getMessage(0);
	}
	else
	{
	msg = t.getMessage();
	}
	assertEquals("throwable message", msgs[i], msg);
	}
	}

	/**
	* Tests the indexOfThrowable() operation.
	*/
	public void testIndexOfThrowable()
	{
	Nestable n = null;
	String msgs[] = null;
	Class[] throwables = null;

	msgs = new String[5];
	msgs[0] = "level 1";
	msgs[1] = "level 2";
	msgs[2] = null;
	msgs[3] = "level 4";
	msgs[4] = "level 5";
	throwables = new Class[5];
	throwables[0] = getTester1Class();
	throwables[1] = getTester2Class();
	throwables[2] = getTester1Class();
	throwables[3] = getTester2Class();
	throwables[4] = getThrowableClass();
	int[] indexes = {0, 1, 0, 1, 4};
	n = getTester1(msgs[0], getTester2(msgs[1], getTester1(getTester2(msgs[3], getThrowable(msgs[4])))));
	for(int i = 0; i < throwables.length; i++)
	{
	doNestableExceptionIndexOfThrowable(n, throwables[i], indexes[i], msgs[indexes[i]]);
	}
	doNestableExceptionIndexOfThrowable(n, getBaseThrowableClass(), 0, msgs[0]);
	doNestableExceptionIndexOfThrowable(n, java.util.Date.class, -1, null);
	doNestableExceptionIndexOfThrowable(n, null, -1, null);
	}

	private void doNestableExceptionIndexOfThrowable(Nestable n, Class type, int expectedIndex, String expectedMsg)
	{
	Throwable t = null;

	int index = n.indexOfThrowable(type);
	assertEquals("index of throwable " + (type == null ? "null" : type.getName()), expectedIndex, index);
	if(expectedIndex > -1)
	{
	t = n.getThrowable(index);
	if(expectedMsg != null)
	{
	String msg = null;
	if(Nestable.class.isInstance(t))
	{
	msg = ((Nestable) t).getMessage(0);
	}
	else
	{
	msg = t.getMessage();
	}
	assertEquals("message of indexed throwable", expectedMsg, msg);
	}
	}
	}

	/**
	* Tests the indexOfThrowable(int) operation.
	*/
	public void testIndexOfThrowableI()
	{
	Nestable n = null;
	String msgs[] = null;
	Class[] throwables = null;

	msgs = new String[5];
	msgs[0] = "level 1";
	msgs[1] = "level 2";
	msgs[2] = null;
	msgs[3] = "level 4";
	msgs[4] = "level 5";
	throwables = new Class[5];
	throwables[0] = getTester1Class();
	throwables[1] = getTester2Class();
	throwables[2] = getTester1Class();
	throwables[3] = getTester2Class();
	throwables[4] = getThrowableClass();
	int[] indexes = {0, 1, 0, 1, 4};
	n = getTester1(msgs[0], getTester2(msgs[1], getTester1(getTester2(msgs[3], getThrowable(msgs[4])))));
	for(int i = 0; i < throwables.length; i++)
	{
	doNestableExceptionIndexOfThrowableI(n, throwables[i], 0, indexes[i], msgs[indexes[i]]);
	}
	doNestableExceptionIndexOfThrowableI(n, getTester2Class(), 2, 3, msgs[3]);
	doNestableExceptionIndexOfThrowableI(n, getTester1Class(), 1, 2, msgs[2]);
	doNestableExceptionIndexOfThrowableI(n, getTester1Class(), 3, -1, null);
	doNestableExceptionIndexOfThrowableI(n, getTester1Class(), 4, -1, null);
	doNestableExceptionIndexOfThrowableI(n, getThrowableClass(), 2, 4, msgs[4]);
	doNestableExceptionIndexOfThrowableI(n, java.util.Date.class, 0, -1, null);
	doNestableExceptionIndexOfThrowableI(n, null, 0, -1, null);

	// Test for index out of bounds
	try
	{
	int index = n.indexOfThrowable(getTester1Class(), -1);
	fail("method should have thrown IndexOutOfBoundsException");
	}
	catch(IndexOutOfBoundsException iooob)
	{
	}
	try
	{
	int index = n.indexOfThrowable(getTester1Class(), 5);
	fail("method should have thrown IndexOutOfBoundsException");
	}
	catch(IndexOutOfBoundsException iooob)
	{
	}

	}

	private void doNestableExceptionIndexOfThrowableI(Nestable n, Class type, int fromIndex, int expectedIndex, String expectedMsg)
	{
	Throwable t = null;

	int index = n.indexOfThrowable(type, fromIndex);
	assertEquals("index of throwable " + (type == null ? "null" : type.getName()), expectedIndex, index);
	if(expectedIndex > -1)
	{
	t = n.getThrowable(index);
	if(expectedMsg != null)
	{
	String msg = null;
	if(Nestable.class.isInstance(t))
	{
	msg = ((Nestable) t).getMessage(0);
	}
	else
	{
	msg = t.getMessage();
	}
	assertEquals("message of indexed throwable", expectedMsg, msg);
	}
	}

	}

	/**
	* Tests the printPartialStackTrace() operation.
	*/
	public void testPrintPartialStackTrace()
	{
	Nestable ne9 = getNestable("ne9", getThrowable("ne9 exception"));
	ByteArrayOutputStream baos2 = new ByteArrayOutputStream();
	PrintStream ps2 = new PrintStream(baos2);
	PrintWriter pw2 = new PrintWriter(ps2, true);
	ne9.printPartialStackTrace(pw2);
	String stack2 = baos2.toString();
	String startsWith = ne9.getClass().getName() + ": ne9";
	assertTrue("stack trace startsWith == " + startsWith,
	stack2.startsWith(startsWith));
	assertEquals("stack trace indexOf rethrown == -1",
	stack2.indexOf("rethrown"), -1);
	}

	/**
	* Tests the printStackTrace() operation.
	*/
	public void testPrintStackTrace()
	{
	Nestable ne8 = getNestable("ne8", getThrowable("ne8 exception"));
	ByteArrayOutputStream baos1 = new ByteArrayOutputStream();
	PrintStream ps1 = new PrintStream(baos1);
	PrintWriter pw1 = new PrintWriter(ps1, true);
	ne8.printStackTrace(pw1);
	String stack1 = baos1.toString();
	String startsWith = ne8.getClass().getName() + ": ne8";
	assertTrue("stack trace startsWith == " + startsWith,
	stack1.startsWith(startsWith));
	String indexOf = getThrowableClass().getName() + ": ne8 exception";
	assertTrue("stack trace indexOf " + indexOf + " > -1",
	stack1.indexOf(indexOf) > -1);
	}

	/**
	* Returns an instance of the <code>Nestable</code> implementation being
	* tested.
	*
	* @return the instance
	*/
	public abstract Nestable getNestable();

	/**
	* Returns an instance of the <code>Nestable</code> implementation being
	* tested.
	*
	* @param n <code>Nestable</code> argument to be provided to the instance
	* constructor
	* @return the instance
	*/
	public abstract Nestable getNestable(Nestable n);

	/**
	* Returns an instance of the <code>Nestable</code> implementation being
	* tested.
	*
	* @param msg <code>String</code> argument to be provided to the instance
	* constructor
	* @return the instance
	*/
	public abstract Nestable getNestable(String msg);

	/**
	* Returns an instance of the <code>Nestable</code> implementation being
	* tested.
	*
	* @param msg <code>String</code> argument to be provided to the instance
	* constructor
	* @param n <code>Nestable</code> argument to be provided to the instance
	* constructor
	* @return the instance
	*/
	public abstract Nestable getNestable(String msg, Nestable n);

	/**
	* Returns an instance of the <code>Nestable</code> implementation being
	* tested.
	*
	* @param msg <code>String</code> argument to be provided to the instance
	* constructor
	* @param t <code>Throwable</code> argument to be provided to the instance
	* constructor
	* @return the instance
	*/
	public abstract Nestable getNestable(String msg, Throwable t);

	/**
	* Returns an instance of the <code>Nestable</code> implementation being
	* tested.
	*
	* @param t <code>Throwable</code> argument to be provided to the instance
	* constructor
	* @return the instance
	*/
	public abstract Nestable getNestable(Throwable t);

	/**
	* Returns an instance of a <code>Throwable</code> to be used in
	* constructing instances of the <code>Nestable</code> implementation being
	* tested.
	*
	* @param msg <code>String</code> argument to be provided to the instance
	* constructor
	* @return the instance
	*/
	public abstract Throwable getThrowable(String msg);

	/**
	* Returns an instance of one tester <code>Nestable</code> implementation.
	*
	* @param n <code>Nestable</code> argument to be provided to the instance
	* constructor
	* @return the instance
	*/
	public abstract Nestable getTester1(Nestable n);

	/**
	* Returns an instance of one tester <code>Nestable</code> implementation.
	*
	* @param t <code>Throwable</code> argument to be provided to the instance
	* constructor
	* @return the instance
	*/
	public abstract Nestable getTester1(Throwable t);

	/**
	* Returns an instance of one tester <code>Nestable</code> implementation.
	*
	* @param msg <code>String</code> argument to be provided to the instance
	* constructor
	* @param n <code>Nestable</code> argument to be provided to the instance
	* constructor
	* @return the instance
	*/
	public abstract Nestable getTester1(String msg, Nestable n);

	/**
	* Returns an instance of one tester <code>Nestable</code> implementation.
	*
	* @param msg <code>String</code> argument to be provided to the instance
	* constructor
	* @param t <code>Throwable</code> argument to be provided to the instance
	* constructor
	* @return the instance
	*/
	public abstract Nestable getTester1(String msg, Throwable t);

	/**
	* Returns an instance of a second tester <code>Nestable</code>
	* implementation.
	*
	* @param msg <code>String</code> argument to be provided to the instance
	* constructor
	* @param n <code>Nestable</code> argument to be provided to the instance
	* constructor
	* @return the instance
	*/
	public abstract Nestable getTester2(String msg, Nestable n);

	/**
	* Returns an instance of a second tester <code>Nestable</code>
	* implementation.
	*
	* @param msg <code>String</code> argument to be provided to the instance
	* constructor
	* @param t <code>Throwable</code> argument to be provided to the instance
	* constructor
	* @return the instance
	*/
	public abstract Nestable getTester2(String msg, Throwable t);

	/**
	* Returns the class of the first tester <code>Nestable</code>
	* implementation.
	*
	* @return the class
	*/
	public abstract Class getTester1Class();

	/**
	* Returns the class of the second tester <code>Nestable</code>
	* implementation.
	*
	* @return the class
	*/
	public abstract Class getTester2Class();

	/**
	* Returns the class of the <code>Throwable</code> used in constructing
	* instances of the <code>Nestable</code> implementation being tested.
	*
	* @return the class
	*/
	public abstract Class getThrowableClass();

	/**
	* Returns the base class being used, typically Error, Eception or RuntimeException.
	*
	* @return the class
	*/
	public abstract Class getBaseThrowableClass();

	}