/*
* *************************************************************************************
* 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.epl.agg.aggregator.AggregationMethod;
import com.espertech.esper.epl.agg.service.AggregationMethodFactory;
import com.espertech.esper.support.epl.SupportExprNode;
import com.espertech.esper.support.epl.SupportExprNodeFactory;
public class TestExprAvedevNode extends TestExprAggregateNodeAdapter
{
public void setUp() throws Exception
{
super.validatedNodeToTest = makeNode(5, Integer.class);
}
public void testGetType() throws Exception
{
assertEquals(Double.class, validatedNodeToTest.getType());
}
public void testToExpressionString() throws Exception
{
assertEquals("avedev(5)", validatedNodeToTest.toExpressionString());
}
public void testEqualsNode() throws Exception
{
assertTrue(validatedNodeToTest.equalsNode(validatedNodeToTest));
assertFalse(validatedNodeToTest.equalsNode(new ExprStddevNode(false, false)));
}
public void testAggregateFunction()
{
AggregationMethodFactory aggFactory = validatedNodeToTest.getFactory();
AggregationMethod agg = aggFactory.make(SupportExprNodeFactory.getMethodResService(), -1, 1, 1);
assertEquals(Double.class, agg.getValueType());
assertNull(agg.getValue());
agg.enter(82);
assertEquals(0D, agg.getValue());
agg.enter(78);
assertEquals(2D, agg.getValue());
agg.enter(70);
double result = (Double)agg.getValue();
assertEquals("4.4444", Double.toString(result).substring(0, 6));
agg.enter(58);
assertEquals(8D, agg.getValue());
agg.enter(42);
assertEquals(12.8D, agg.getValue());
agg.leave(82);
assertEquals(12D, agg.getValue());
agg.leave(58);
result = (Double)agg.getValue();
assertEquals("14.2222", Double.toString(result).substring(0, 7));
}
private ExprAvedevNode makeNode(Object value, Class type) throws Exception
{
ExprAvedevNode avedevNode = new ExprAvedevNode(false, false);
avedevNode.addChildNode(new SupportExprNode(value, type));
SupportExprNodeFactory.validate3Stream(avedevNode);
return avedevNode;
}
}