/**
* Copyright (C) 2009-2010 Wilfred Springer
*
* This file is part of Preon.
*
* Preon is free software; you can redistribute it and/or modify it under the
* terms of the GNU General Public License as published by the Free Software
* Foundation; either version 2, or (at your option) any later version.
*
* Preon is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
* A PARTICULAR PURPOSE. See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along with
* Preon; see the file COPYING. If not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Linking this library statically or dynamically with other modules is making a
* combined work based on this library. Thus, the terms and conditions of the
* GNU General Public License cover the whole combination.
*
* As a special exception, the copyright holders of this library give you
* permission to link this library with independent modules to produce an
* executable, regardless of the license terms of these independent modules, and
* to copy and distribute the resulting executable under terms of your choice,
* provided that you also meet, for each linked independent module, the terms
* and conditions of the license of that module. An independent module is a
* module which is not derived from or based on this library. If you modify this
* library, you may extend this exception to your version of the library, but
* you are not obligated to do so. If you do not wish to do so, delete this
* exception statement from your version.
*/
package org.codehaus.preon.el.ast;
import org.junit.Test;
import static org.junit.Assert.*;
import org.codehaus.preon.el.*;
import org.codehaus.preon.el.ast.ArithmeticNode.Operator;
import org.codehaus.preon.el.util.StringBuilderDocument;
/**
* A number of tests for expression simplification.
*
* @author Wilfred Springer (wis)
*
*/
public class NodeSimplificationTest {
@Test
public void testSimplifySimple() {
IntegerNode<Object> node1 = new IntegerNode<Object>(12);
IntegerNode<Object> node2 = new IntegerNode<Object>(5);
ArithmeticNode<Object> node3 = new ArithmeticNode<Object>(Operator.plus, node1, node2);
node3.simplify();
StringBuilderDocument doc = new StringBuilderDocument();
node3.document(doc);
assertEquals("the sum of 12 and 5", doc.toString());
Node<Integer, Object> node4 = node3.simplify();
doc = new StringBuilderDocument();
node4.document(doc);
assertEquals("17", doc.toString());
}
@Test
public void testSimplifyTriple() {
IntegerNode<Object> node1 = new IntegerNode<Object>(12);
IntegerNode<Object> node2 = new IntegerNode<Object>(5);
IntegerNode<Object> node3 = new IntegerNode<Object>(5);
ArithmeticNode<Object> node4 = new ArithmeticNode<Object>(Operator.plus, node1, node2);
node4 = new ArithmeticNode<Object>(Operator.plus, node4, node3);
Node<Integer, Object> result = node4.simplify();
StringBuilderDocument doc = new StringBuilderDocument();
result.document(doc);
assertEquals("22", doc.toString());
}
@Test
public void testTripleWithVarible() {
IntegerNode<Object> node1 = new IntegerNode<Object>(12);
IntegerNode<Object> node2 = new IntegerNode<Object>(5);
IntegerReferenceNode<Object> node3 = new IntegerReferenceNode<Object>(
new TestReference("a"));
ArithmeticNode<Object> node4 = new ArithmeticNode<Object>(Operator.plus, node1, node2);
node4 = new ArithmeticNode<Object>(Operator.plus, node4, node3);
Node<Integer, Object> result = node4.simplify();
StringBuilderDocument doc = new StringBuilderDocument();
result.document(doc);
assertEquals("the sum of 17 and a", doc.toString());
}
private class TestReference implements Reference<Object> {
private String name;
public TestReference(String name) {
this.name = name;
}
public ReferenceContext<Object> getReferenceContext() {
return null;
}
public boolean isAssignableTo(Class<?> type) {
return false;
}
public java.lang.Object resolve(Object context) {
return null;
}
public Reference<Object> selectAttribute(String name) throws BindingException {
return null;
}
public Reference<Object> selectItem(String index) throws BindingException {
return null;
}
public Reference<Object> selectItem(Expression<Integer, Object> index)
throws BindingException {
return null;
}
public void document(Document target) {
target.text(name);
}
public Class<?> getType() {
return null;
}
public Reference<Object> narrow(Class<?> type) {
return null;
}
public boolean isBasedOn(ReferenceContext<java.lang.Object> objectReferenceContext) {
return false;
}
public Reference<Object> rescope(ReferenceContext<Object> objectReferenceContext) {
return this;
}
}
}