/**
* 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.mahout.common.MahoutTestCase;
import org.junit.Test;
public final class GramKeyGroupComparatorTest extends MahoutTestCase {
@Test
public void testComparator() {
byte[] foo = new byte[1];
foo[0] = (byte) 1;
byte[] empty = new byte[0];
GramKey a = new GramKey(new Gram("foo", 1, Gram.Type.HEAD), empty); // base
GramKey b = new GramKey(new Gram("foo", 1, Gram.Type.HEAD), foo); // vary byte
GramKey c = new GramKey(new Gram("foo", 2, Gram.Type.HEAD), empty); // vary freq
GramKey d = new GramKey(new Gram("foo", 1, Gram.Type.TAIL), empty); // vary type
GramKey e = new GramKey(new Gram("bar", 5, Gram.Type.HEAD), empty); // vary string
GramKeyGroupComparator cmp = new GramKeyGroupComparator();
assertEquals(0, cmp.compare(a, b));
assertEquals(0, cmp.compare(a, c));
assertTrue(0 > cmp.compare(a, d));
assertTrue(0 < cmp.compare(a, e));
assertTrue(0 < cmp.compare(d, e));
}
}