/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.pig.piggybank.test.evaluation.datetime;

import org.apache.pig.data.Tuple;
import org.apache.pig.data.TupleFactory;
import org.apache.pig.piggybank.evaluation.datetime.DiffDate;
import org.junit.Test;

import junit.framework.TestCase;

public class TestDiffDate extends TestCase {
    @Test
    public void testDiffDate() throws Exception {
        Tuple t1 = TupleFactory.getInstance().newTuple(2);
        t1.set(0, "20090608");
        t1.set(1, "20090701");
        
        Tuple t2 = TupleFactory.getInstance().newTuple(2);
        t2.set(0, "20090701");
        t2.set(1, "20080501");
        
        Tuple t3 = TupleFactory.getInstance().newTuple(2);
        t3.set(0, null);
        t3.set(1, "20090701");
        
        Tuple t4 = TupleFactory.getInstance().newTuple(2);
        t4.set(0, "20090608");
        t4.set(1, null);
        
        DiffDate func = new DiffDate();
        Integer r = func.exec(t1);
        assertTrue(r==-23);
        
        r = func.exec(t2);
        assertTrue(r==426);
        
        r = func.exec(t3);
        assertTrue(r==null);
        
        r = func.exec(t4);
        assertTrue(r==null);
    }
}