SetPropertyExpressionTest.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 static org.junit.Assert.assertNull;
import static org.junit.Assert.assertSame;
import static org.junit.Assert.fail;

import java.util.ArrayList;

import org.eclipse.xtend.backend.common.ExecutionException;
import org.eclipse.xtend.backend.testhelpers.BeanWithSizeProperty;
import org.junit.Test;


/**
 * 
 * @author Arno Haase (http://www.haase-consulting.com)
 * @author Andr� Arnold
 */
public class SetPropertyExpressionTest {
    @Test public void testReadWrite () {
        final BeanWithSizeProperty bwsp = new BeanWithSizeProperty (5);
        
        assertSame (bwsp, eval (bwsp, "size", 9L));
        assertEquals (9L, bwsp.getSize());

        assertSame (bwsp, eval (bwsp, "size", 3L));
        assertEquals (3L, bwsp.getSize());
        
        assertNull (eval (null, "abc", "newValue"));
        
        try {
            eval (new ArrayList<Object>(), "size", 9L);
            fail ("exception expected");
        }
        catch (ExecutionException e) {
        }
    }
    
    private Object eval (Object target, String propName, Object newValue) {
        return new SetPropertyExpression (createLiteral (target), propName, createLiteral(newValue), SOURCE_POS).evaluate (createEmptyExecutionContext());
    }
}