HidingLocalVarDefExpressionTest.java

/*
Copyright (c) 2008 Arno Haase, Andr� Arnold.
All rights reserved. This program and the accompanying materials
are made available under the terms of the Eclipse Public License v1.0
which accompanies this distribution, and is available at
http://www.eclipse.org/legal/epl-v10.html

Contributors:
    Arno Haase - initial API and implementation
    Andr� Arnold
 */
package org.eclipse.xtend.backend.expr;

import static org.eclipse.xtend.backend.testhelpers.BackendTestHelper.SOURCE_POS;
import static org.eclipse.xtend.backend.testhelpers.BackendTestHelper.createEmptyExecutionContext;
import static org.eclipse.xtend.backend.testhelpers.BackendTestHelper.createLiteral;
import static org.junit.Assert.assertEquals;

import org.eclipse.xtend.backend.common.ExecutionContext;
import org.eclipse.xtend.backend.common.ExpressionBase;
import org.junit.Test;


/**
 * 
 * @author Arno Haase (http://www.haase-consulting.com)
 * @author Andr� Arnold
 */
public class HidingLocalVarDefExpressionTest {
    
    @Test public void testLocalVar () {
        final ExecutionContext outerCtx = createEmptyExecutionContext();
        outerCtx.getLocalVarContext().getLocalVars().put ("a", "aValue");
        
        final ExpressionBase expr = new HidingLocalVarDefExpression ("a", createLiteral("bValue"), new ExpressionBase (SOURCE_POS) {
            @Override
            protected Object evaluateInternal (ExecutionContext innerCtx) {
                assertEquals ("bValue", innerCtx.getLocalVarContext().getLocalVars().get ("a"));
                return "xyz";
            }
        }, SOURCE_POS);
        
        assertEquals ("xyz", expr.evaluate (outerCtx));
        assertEquals ("aValue", outerCtx.getLocalVarContext().getLocalVars().get ("a"));
    }
}