/**
* 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.mahout.vectorizer.collocations.llr;
import org.apache.hadoop.mapreduce.Partitioner;
import org.apache.mahout.common.MahoutTestCase;
import org.junit.Test;
public final class GramKeyPartitionerTest extends MahoutTestCase {
@Test
public void testPartition() {
byte[] foo = new byte[1];
foo[0] = 1;
foo[0] = 2;
byte[] empty = new byte[0];
GramKey a = new GramKey(new Gram("foo", 1, Gram.Type.HEAD), empty);
GramKey b = new GramKey(new Gram("foo", 1, Gram.Type.HEAD), foo);
byte[] bar = new byte[1];
GramKey c = new GramKey(new Gram("foo", 2, Gram.Type.HEAD), bar);
GramKey d = new GramKey(new Gram("foo", 1, Gram.Type.TAIL), empty);
GramKey e = new GramKey(new Gram("foo", 2, Gram.Type.TAIL), foo);
Partitioner<GramKey, Gram> p = new GramKeyPartitioner();
int numPartitions = 5;
int ap = p.getPartition(a, null, numPartitions);
int bp = p.getPartition(b, null, numPartitions);
int cp = p.getPartition(c, null, numPartitions);
int dp = p.getPartition(d, null, numPartitions);
int ep = p.getPartition(e, null, numPartitions);
assertEquals(ap, bp);
assertEquals(ap, cp);
assertEquals(dp, ep);
}
}