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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 java.util.HashMap;
import java.util.Map;

import javax.servlet.jsp.el.ELException;
import javax.servlet.jsp.el.VariableResolver;

/**
 * Mock implementation of VariableResolver.
 * This implementation cannot be used for real EL
 * expressions. Real EL expression support is only
 * available for the Unified Expression Language API
 * using the {@link JasperJspFactory}.
 */
public class MockVariableResolver implements VariableResolver
{
    private Map variables = new HashMap();
    
    /**
     * Adds a variable that resolves to the specified object.
     * @param name the variable name
     * @param value the variable value
     */
    public void addVariable(String name, Object value)
    {
        variables.put(name, value);
    }
    
    /**
     * Clears all variables.
     */
    public void clearVariables()
    {
        variables.clear();
    }

    public Object resolveVariable(String name) throws ELException
    {
        return variables.get(name);
    }
}