MinHashUDFTest.java

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 * 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
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 *
 *   http://www.apache.org/licenses/LICENSE-2.0
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package hivemall.knn.lsh;

import hivemall.knn.lsh.MinHashesUDF;

import java.util.Arrays;

import org.apache.hadoop.hive.ql.metadata.HiveException;
import org.junit.Test;
import org.junit.Assert;

public class MinHashUDFTest {

    @Test
    public void testEvaluate() throws HiveException {
        MinHashesUDF minhash = new MinHashesUDF();

        Assert.assertEquals(5, minhash.evaluate(Arrays.asList(1, 2, 3, 4)).size());
        Assert.assertEquals(9, minhash.evaluate(Arrays.asList(1, 2, 3, 4), 9, 2).size());

        Assert.assertEquals(minhash.evaluate(Arrays.asList(1, 2, 3, 4)),
            minhash.evaluate(Arrays.asList(1, 2, 3, 4), 5, 2));

        Assert.assertEquals(minhash.evaluate(Arrays.asList(1, 2, 3, 4)),
            minhash.evaluate(Arrays.asList("1", "2", "3", "4"), true));

        Assert.assertEquals(minhash.evaluate(Arrays.asList(1, 2, 3, 4)),
            minhash.evaluate(Arrays.asList("1:1.0", "2:1.0", "3:1.0", "4:1.0"), false));
    }
}