ognltestcase.java

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//--------------------------------------------------------------------------
//  Copyright (c) 2004, Drew Davidson and Luke Blanshard
//  All rights reserved.
//
//  Redistribution and use in source and binary forms, with or without
//  modification, are permitted provided that the following conditions are
//  met:
//
//  Redistributions of source code must retain the above copyright notice,
//  this list of conditions and the following disclaimer.
//  Redistributions in binary form must reproduce the above copyright
//  notice, this list of conditions and the following disclaimer in the
//  documentation and/or other materials provided with the distribution.
//  Neither the name of the Drew Davidson nor the names of its contributors
//  may be used to endorse or promote products derived from this software
//  without specific prior written permission.
//
//  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
//  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
//  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
//  FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
//  COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
//  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
//  BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
//  OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
//  AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
//  OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
//  THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
//  DAMAGE.
//--------------------------------------------------------------------------
package org.ognl.test;

import java.io.*;
import java.lang.reflect.*;
import junit.framework.TestCase;
import ognl.Ognl;
import ognl.OgnlContext;
import ognl.OgnlException;
import ognl.SimpleNode;

public class OgnlTestCase extends TestCase
{
    protected OgnlContext               context;
    private String                      expressionString;
    private SimpleNode                  expression;
    private Object                      expectedResult;
    private Object                      root;
    private boolean                     hasSetValue;
    private Object                      setValue;
    private boolean                     hasExpectedAfterSetResult;
    private Object                      expectedAfterSetResult;

	/*===================================================================
		Public static methods
	  ===================================================================*/
	/**
		Returns true if object1 is equal to object2 in either the
		sense that they are the same object or, if both are non-null
		if they are equal in the <CODE>equals()</CODE> sense.
	 */
	public static boolean isEqual(Object object1, Object object2)
	{
        boolean     result = false;

      	if (object1 == object2) {
      	    result = true;
      	} else {
	      	if ((object1 != null) && object1.getClass().isArray()) {
	      	    if ((object2 != null) && object2.getClass().isArray() && (object2.getClass() == object1.getClass())) {
	      	        result = (Array.getLength(object1) == Array.getLength(object2));
                    if (result) {
                        for (int i = 0, icount = Array.getLength(object1); result && (i < icount); i++) {
                            result = isEqual(Array.get(object1, i), Array.get(object2, i));
                        }
                    }
	      	    }
	      	} else {
    	        result = (object1 != null) && (object2 != null) && object1.equals(object2);
    	    }
    	}
        return result;
	}

	/*===================================================================
		Constructors
	  ===================================================================*/
	public OgnlTestCase()
	{
	    super();
	}

	public OgnlTestCase(String name)
	{
	    super(name);
	}

    public OgnlTestCase(String name, Object root, String expressionString, Object expectedResult, Object setValue, Object expectedAfterSetResult)
    {
        this(name, root, expressionString, expectedResult, setValue);
        this.hasExpectedAfterSetResult = true;
        this.expectedAfterSetResult = expectedAfterSetResult;
    }

    public OgnlTestCase(String name, Object root, String expressionString, Object expectedResult, Object setValue)
    {
        this(name, root, expressionString, expectedResult);
        this.hasSetValue = true;
        this.setValue = setValue;
    }

    public OgnlTestCase(String name, Object root, String expressionString, Object expectedResult)
    {
        this(name);
        this.root = root;
        this.expressionString = expressionString;
        this.expectedResult = expectedResult;
    }

	/*===================================================================
		Public methods
	  ===================================================================*/
	public String getExpressionDump(SimpleNode node)
	{
	    StringWriter        writer = new StringWriter();

        node.dump(new PrintWriter(writer), "   ");
	    return writer.toString();
	}

	public String getExpressionString()
	{
	    return expressionString;
	}

	public SimpleNode getExpression() throws OgnlException
	{
	    if (expression == null) {
	        expression = (SimpleNode)Ognl.parseExpression(expressionString);
	    }
	    return expression;
	}

	public Object getExpectedResult()
	{
	    return expectedResult;
	}

	/*===================================================================
		Overridden methods
	  ===================================================================*/
    protected void runTest() throws Exception
    {
        Object          testedResult = null;

        try {
            SimpleNode  expr;

            testedResult = expectedResult;
            expr = getExpression();
            /*
            PrintWriter writer = new PrintWriter(System.err);
            System.err.println(expr.toString());
            expr.dump(writer, "");
            writer.flush();
            */
            assertTrue(isEqual(Ognl.getValue(expr, context, root), expectedResult));
            if (hasSetValue) {
                testedResult = hasExpectedAfterSetResult ? expectedAfterSetResult : setValue;
                Ognl.setValue(expr, context, root, setValue);
                assertTrue(isEqual(Ognl.getValue(expr, context, root), testedResult));
            }
        } catch (Exception ex) {
            if (testedResult instanceof Class) {
                assertTrue(((Class)testedResult).isAssignableFrom(ex.getClass()));
            } else {
                throw ex;
            }
        }
    }

    protected void setUp()
    {
        context = (OgnlContext)Ognl.createDefaultContext(null);
    }
}