TestExprNodeIdentifierVisitor.java

/*
 ***************************************************************************************
 *  Copyright (C) 2006 EsperTech, Inc. All rights reserved.                            *
 *  http://www.espertech.com/esper                                                     *
 *  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.ops;

import com.espertech.esper.epl.expression.core.ExprNode;
import com.espertech.esper.epl.expression.visitor.ExprNodeIdentifierVisitor;
import com.espertech.esper.supportunit.epl.SupportExprNodeFactory;
import junit.framework.TestCase;

public class TestExprNodeIdentifierVisitor extends TestCase {
    private ExprNode exprNode;

    public void setUp() throws Exception {
        exprNode = SupportExprNodeFactory.makeMathNode();
    }

    public void testVisit() throws Exception {
        // test without aggregation nodes
        ExprNodeIdentifierVisitor visitor = new ExprNodeIdentifierVisitor(false);
        exprNode.accept(visitor);

        assertEquals(2, visitor.getExprProperties().size());
        assertEquals(0, (Object) visitor.getExprProperties().get(0).getFirst());
        assertEquals("intBoxed", (Object) visitor.getExprProperties().get(0).getSecond());
        assertEquals(0, (Object) visitor.getExprProperties().get(1).getFirst());
        assertEquals("intPrimitive", (Object) visitor.getExprProperties().get(1).getSecond());

        // test with aggregation nodes, such as "intBoxed * sum(intPrimitive)"
        exprNode = SupportExprNodeFactory.makeSumAndFactorNode();
        visitor = new ExprNodeIdentifierVisitor(true);
        exprNode.accept(visitor);
        assertEquals(2, visitor.getExprProperties().size());
        assertEquals("intBoxed", (Object) visitor.getExprProperties().get(0).getSecond());
        assertEquals("intPrimitive", (Object) visitor.getExprProperties().get(1).getSecond());

        visitor = new ExprNodeIdentifierVisitor(false);
        exprNode.accept(visitor);
        assertEquals(1, visitor.getExprProperties().size());
        assertEquals("intBoxed", (Object) visitor.getExprProperties().get(0).getSecond());
    }
}