AndExpressionTest.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.testhelpers.ExceptionThrowingExpression;
import org.junit.Test;


/**
 * 
 * @author Arno Haase (http://www.haase-consulting.com)
 * @author Andr� Arnold
 */
public class AndExpressionTest {
    @Test public void testLogic () {
        assertEquals (true, eval (true, true));
        assertEquals (false, eval (true, false));
        assertEquals (false, eval (false, true));
        assertEquals (false, eval (false, false));

        assertEquals (null, eval (null, false));
        assertEquals (null, eval (null, true));
        assertEquals (false, eval (false, null));
        assertEquals (null, eval (true, null));
        assertEquals (null, eval (null, null));
    }
    
    private Object eval (Boolean b1, Boolean b2) {
        return new AndExpression (createLiteral (b1), createLiteral (b2), SOURCE_POS).evaluate (createEmptyExecutionContext());
    }
    
    @Test public void testShortcutEvaluation () {
        assertEquals (false, new AndExpression (createLiteral (false), new ExceptionThrowingExpression(), SOURCE_POS).evaluate (createEmptyExecutionContext()));
    }
}