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Mockrunner is a lightweight framework for unit testing applications in the J2EE environment. It supports servlets, filters, tag classes and Struts actions. It includes a JDBC a JMS and a JCA test framework and can be used to test EJB based applications.

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package com.mockrunner.mock.web;

import javax.servlet.jsp.el.ELException;
import javax.servlet.jsp.el.Expression;
import javax.servlet.jsp.el.ExpressionEvaluator;
import javax.servlet.jsp.el.FunctionMapper;
import javax.servlet.jsp.el.VariableResolver;

/**
 * Mock implementation of Expression.
 */
public class MockExpression extends Expression
{
    private ExpressionEvaluator evaluator;
    private String expression;
    private Class expectedType;
    private FunctionMapper mapper;
    
    public MockExpression(ExpressionEvaluator evaluator, String expression, Class expectedType, FunctionMapper mapper)
    {
        this.evaluator = evaluator;
        this.expression = expression;
        this.expectedType = expectedType;
        this.mapper = mapper;
    }

    public Object evaluate(VariableResolver resolver) throws ELException
    {
        return evaluator.evaluate(expression, expectedType, resolver, mapper);
    }
}