TestAggregateImpl.java

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 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
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 * Lesser General Public License for more details.
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package org.teiid.dqp.internal.datamgr;

import junit.framework.TestCase;

import org.teiid.core.types.DataTypeManager;
import org.teiid.language.AggregateFunction;
import org.teiid.language.Literal;
import org.teiid.language.SQLConstants.NonReserved;
import org.teiid.query.sql.symbol.AggregateSymbol;
import org.teiid.query.sql.symbol.Constant;


public class TestAggregateImpl extends TestCase {

    /**
     * Constructor for TestAggregateImpl.
     * @param name
     */
    public TestAggregateImpl(String name) {
        super(name);
    }

    public static AggregateFunction example(String name, String functionName, boolean distinct, int value) throws Exception {
        AggregateSymbol symbol = new AggregateSymbol(functionName,
                                                     distinct,
                                                     new Constant(new Integer(value)));
        return TstLanguageBridgeFactory.factory.translate(symbol);
        
    }

    public void testGetName() throws Exception {
        assertEquals(AggregateFunction.COUNT, example("testName", NonReserved.COUNT, true, 42).getName()); //$NON-NLS-1$ 
    }

    public void testUserDefinedName() throws Exception {
        assertEquals("FIRST_VALUE", example("testName", "FIRST_VALUE", true, 42).getName()); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$ 
    }
    
    public void testIsDistinct() throws Exception {
        assertTrue(example("testName", NonReserved.COUNT, true, 42).isDistinct()); //$NON-NLS-1$
        assertFalse(example("testName", NonReserved.COUNT, false, 42).isDistinct()); //$NON-NLS-1$
    }

    public void testGetExpression() throws Exception {
        AggregateFunction agg = example("testName", NonReserved.COUNT, true, 42); //$NON-NLS-1$
        assertNotNull(agg.getExpression());
        assertTrue(agg.getExpression() instanceof Literal);
        assertEquals(new Integer(42), ((Literal)agg.getExpression()).getValue());
    }

    public void testGetType() throws Exception {
        assertEquals(DataTypeManager.DefaultDataClasses.INTEGER, example("x", NonReserved.COUNT, true, 42).getType()); //$NON-NLS-1$
    }

}