/* * ************************************************************************************* * Copyright (C) 2008 EsperTech, Inc. All rights reserved. * * http://esper.codehaus.org * * http://www.espertech.com * * ---------------------------------------------------------------------------------- * * The software in this package is published under the terms of the GPL license * * a copy of which has been included with this distribution in the license.txt file. * * ************************************************************************************* */ package com.espertech.esper.epl.expression; import com.espertech.esper.support.epl.SupportExprNodeUtil; import junit.framework.TestCase; import com.espertech.esper.support.epl.SupportExprNode; import com.espertech.esper.type.MathArithTypeEnum; public class TestExprMathNode extends TestCase { private ExprMathNode arithNode; public void setUp() { arithNode = new ExprMathNode(MathArithTypeEnum.ADD, false, false); } public void testGetType() throws Exception { arithNode.addChildNode(new SupportExprNode(Double.class)); arithNode.addChildNode(new SupportExprNode(Integer.class)); arithNode.validate(ExprValidationContextFactory.makeEmpty()); assertEquals(Double.class, arithNode.getType()); } public void testToExpressionString() throws Exception { // Build (5*(4-2)), not the same as 5*4-2 ExprMathNode arithNodeChild = new ExprMathNode(MathArithTypeEnum.SUBTRACT, false, false); arithNodeChild.addChildNode(new SupportExprNode(4)); arithNodeChild.addChildNode(new SupportExprNode(2)); arithNode = new ExprMathNode(MathArithTypeEnum.MULTIPLY, false, false); arithNode.addChildNode(new SupportExprNode(5)); arithNode.addChildNode(arithNodeChild); assertEquals("(5*(4-2))", arithNode.toExpressionString()); } public void testValidate() { // Must have exactly 2 subnodes try { arithNode.validate(ExprValidationContextFactory.makeEmpty()); fail(); } catch (ExprValidationException ex) { // Expected } // Must have only number-type subnodes arithNode.addChildNode(new SupportExprNode(String.class)); arithNode.addChildNode(new SupportExprNode(Integer.class)); try { arithNode.validate(ExprValidationContextFactory.makeEmpty()); fail(); } catch (ExprValidationException ex) { // Expected } } public void testEvaluate() throws Exception { arithNode.addChildNode(new SupportExprNode(new Integer(10))); arithNode.addChildNode(new SupportExprNode(new Double(1.5))); ExprNodeUtility.getValidatedSubtree(arithNode, ExprValidationContextFactory.makeEmpty()); assertEquals(11.5d, arithNode.evaluate(null, false, null)); arithNode = makeNode(null, Integer.class, 5d, Double.class); assertNull(arithNode.evaluate(null, false, null)); arithNode = makeNode(5, Integer.class, null, Double.class); assertNull(arithNode.evaluate(null, false, null)); arithNode = makeNode(null, Integer.class, null, Double.class); assertNull(arithNode.evaluate(null, false, null)); } public void testEqualsNode() throws Exception { assertTrue(arithNode.equalsNode(arithNode)); assertFalse(arithNode.equalsNode(new ExprMathNode(MathArithTypeEnum.DIVIDE, false, false))); } private ExprMathNode makeNode(Object valueLeft, Class typeLeft, Object valueRight, Class typeRight) throws Exception { ExprMathNode mathNode = new ExprMathNode(MathArithTypeEnum.MULTIPLY, false, false); mathNode.addChildNode(new SupportExprNode(valueLeft, typeLeft)); mathNode.addChildNode(new SupportExprNode(valueRight, typeRight)); SupportExprNodeUtil.validate(mathNode); return mathNode; } }