/*
* Copyright (c) 2007-2014 Concurrent, Inc. All Rights Reserved.
*
* Project and contact information: http://www.cascading.org/
*
* This file is part of the Cascading project.
*
* Licensed 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 cascading.operation.aggregator;
import java.util.Iterator;
import cascading.CascadingTestCase;
import cascading.operation.Aggregator;
import cascading.tuple.Fields;
import cascading.tuple.Tuple;
import cascading.tuple.TupleListCollector;
import org.junit.Test;
/**
*
*/
public class AggregatorsTest extends CascadingTestCase
{
public AggregatorsTest()
{
}
@Test
public void testAverage()
{
Aggregator aggregator = new Average();
Tuple[] arguments = new Tuple[]{new Tuple( new Double( 1.0 ) ), new Tuple( new Double( 3.0 ) ),
new Tuple( new Double( 2.0 ) ), new Tuple( new Double( 4.0 ) ),
new Tuple( new Double( -5.0 ) )};
Fields resultFields = new Fields( "field" );
TupleListCollector resultEntryCollector = invokeAggregator( aggregator, arguments, resultFields );
Tuple tuple = resultEntryCollector.iterator().next();
assertEquals( "got expected value after aggregate", 1.0, tuple.getDouble( 0 ), 0.0d );
}
@Test
public void testCount()
{
Aggregator aggregator = new Count();
Tuple[] arguments = new Tuple[]{new Tuple( new Double( 1.0 ) ), new Tuple( new Double( 3.0 ) ),
new Tuple( new Double( 2.0 ) ), new Tuple( new Double( 4.0 ) ),
new Tuple( new Double( -5.0 ) )};
Fields resultFields = new Fields( "field" );
TupleListCollector resultEntryCollector = invokeAggregator( aggregator, arguments, resultFields );
Tuple tuple = resultEntryCollector.iterator().next();
assertEquals( "got expected value after aggregate", 5, tuple.getInteger( 0 ) );
}
@Test
public void testFirst()
{
Aggregator aggregator = new First();
Tuple[] arguments = new Tuple[]{new Tuple( new Double( 1.0 ) ), new Tuple( new Double( 3.0 ) ),
new Tuple( new Double( 2.0 ) ), new Tuple( new Double( 4.0 ) ),
new Tuple( new Double( -5.0 ) )};
Fields resultFields = new Fields( "field" );
TupleListCollector resultEntryCollector = invokeAggregator( aggregator, arguments, resultFields );
Tuple tuple = resultEntryCollector.iterator().next();
assertEquals( "got expected value after aggregate", 1.0, tuple.getDouble( 0 ), 0.0d );
}
@Test
public void testFirstN()
{
Aggregator aggregator = new First( 3 );
Tuple[] arguments = new Tuple[]{new Tuple( new Double( 1.0 ) ), new Tuple( new Double( 3.0 ) ),
new Tuple( new Double( 2.0 ) ), new Tuple( new Double( 4.0 ) ),
new Tuple( new Double( -5.0 ) )};
Fields resultFields = new Fields( "field" );
TupleListCollector resultEntryCollector = invokeAggregator( aggregator, arguments, resultFields );
Iterator<Tuple> iterator = resultEntryCollector.iterator();
assertEquals( "got expected value after aggregate", 1.0, iterator.next().getDouble( 0 ), 0.0d );
assertEquals( "got expected value after aggregate", 3.0, iterator.next().getDouble( 0 ), 0.0d );
assertEquals( "got expected value after aggregate", 2.0, iterator.next().getDouble( 0 ), 0.0d );
}
@Test
public void testLast()
{
Aggregator aggregator = new Last();
Tuple[] arguments = new Tuple[]{new Tuple( new Double( 1.0 ) ), new Tuple( new Double( 3.0 ) ),
new Tuple( new Double( 2.0 ) ), new Tuple( new Double( 4.0 ) ),
new Tuple( new Double( -5.0 ) )};
Fields resultFields = new Fields( "field" );
TupleListCollector resultEntryCollector = invokeAggregator( aggregator, arguments, resultFields );
Tuple tuple = resultEntryCollector.iterator().next();
assertEquals( "got expected value after aggregate", -5.0, tuple.getDouble( 0 ), 0.0d );
}
@Test
public void testMax()
{
Aggregator aggregator = new Max();
Tuple[] arguments = new Tuple[]{new Tuple( new Double( 1.0 ) ), new Tuple( new Double( 3.0 ) ),
new Tuple( new Double( 2.0 ) ), new Tuple( new Double( 4.0 ) ),
new Tuple( new Double( -5.0 ) )};
Fields resultFields = new Fields( "field" );
TupleListCollector resultEntryCollector = invokeAggregator( aggregator, arguments, resultFields );
Tuple tuple = resultEntryCollector.iterator().next();
assertEquals( "got expected value after aggregate", 4.0, tuple.getDouble( 0 ), 0.0d );
}
@Test
public void testMin()
{
Aggregator aggregator = new Min();
Tuple[] arguments = new Tuple[]{new Tuple( new Double( 1.0 ) ), new Tuple( new Double( 3.0 ) ),
new Tuple( new Double( 2.0 ) ), new Tuple( new Double( 4.0 ) ),
new Tuple( new Double( -5.0 ) )};
Fields resultFields = new Fields( "field" );
TupleListCollector resultEntryCollector = invokeAggregator( aggregator, arguments, resultFields );
Tuple tuple = resultEntryCollector.iterator().next();
assertEquals( "got expected value after aggregate", -5.0, tuple.getDouble( 0 ), 0.0d );
}
@Test
public void testSum()
{
Aggregator aggregator = new Sum();
Tuple[] arguments = new Tuple[]{new Tuple( new Double( 1.0 ) ), new Tuple( new Double( 3.0 ) ),
new Tuple( new Double( 2.0 ) ), new Tuple( new Double( 4.0 ) ),
new Tuple( new Double( -5.0 ) )};
Fields resultFields = new Fields( "field" );
TupleListCollector resultEntryCollector = invokeAggregator( aggregator, arguments, resultFields );
Tuple tuple = resultEntryCollector.iterator().next();
assertEquals( "got expected value after aggregate", 5.0, tuple.getDouble( 0 ), 0.0d );
}
@Test
public void testMaxValue()
{
Aggregator aggregator = new MaxValue();
Tuple[] arguments = new Tuple[]{new Tuple( new Double( 1.0 ) ), new Tuple( new Double( 3.0 ) ),
new Tuple( new Double( 2.0 ) ), new Tuple( new Double( 4.0 ) ),
new Tuple( new Double( -5.0 ) )};
Fields resultFields = new Fields( "field" );
TupleListCollector resultEntryCollector = invokeAggregator( aggregator, arguments, resultFields );
Tuple tuple = resultEntryCollector.iterator().next();
assertEquals( "got expected value after aggregate", 4.0, tuple.getDouble( 0 ), 0.0d );
}
@Test
public void testMinValue()
{
Aggregator aggregator = new MinValue();
Tuple[] arguments = new Tuple[]{new Tuple( new Double( 1.0 ) ), new Tuple( new Double( 3.0 ) ),
new Tuple( new Double( 2.0 ) ), new Tuple( new Double( 4.0 ) ),
new Tuple( new Double( -5.0 ) )};
Fields resultFields = new Fields( "field" );
TupleListCollector resultEntryCollector = invokeAggregator( aggregator, arguments, resultFields );
Tuple tuple = resultEntryCollector.iterator().next();
assertEquals( "got expected value after aggregate", -5.0, tuple.getDouble( 0 ), 0.0d );
}
@Test
public void testMaxValueNonNumber()
{
Aggregator aggregator = new MaxValue();
Tuple[] arguments = new Tuple[]{new Tuple( 'a' ), new Tuple( 'b' ),
new Tuple( 'c' ), new Tuple( 'd' ),
new Tuple( 'e' )};
Fields resultFields = new Fields( "field" );
TupleListCollector resultEntryCollector = invokeAggregator( aggregator, arguments, resultFields );
Tuple tuple = resultEntryCollector.iterator().next();
assertEquals( "got expected value after aggregate", 'e', tuple.getChar( 0 ) );
}
@Test
public void testMinValueNonNumber()
{
Aggregator aggregator = new MinValue();
Tuple[] arguments = new Tuple[]{new Tuple( 'a' ), new Tuple( 'b' ),
new Tuple( 'c' ), new Tuple( 'd' ),
new Tuple( 'e' )};
Fields resultFields = new Fields( "field" );
TupleListCollector resultEntryCollector = invokeAggregator( aggregator, arguments, resultFields );
Tuple tuple = resultEntryCollector.iterator().next();
assertEquals( "got expected value after aggregate", 'a', tuple.getChar( 0 ) );
}
}