| /* |
| * 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.drill.exec.udfs; |
| |
| import org.apache.drill.categories.SqlFunctionTest; |
| import org.apache.drill.categories.UnlikelyTest; |
| import org.apache.drill.test.ClusterFixture; |
| import org.apache.drill.test.ClusterFixtureBuilder; |
| import org.apache.drill.test.ClusterTest; |
| import org.junit.BeforeClass; |
| import org.junit.Test; |
| import org.junit.experimental.categories.Category; |
| |
| import static org.junit.Assert.assertEquals; |
| |
| @Category({UnlikelyTest.class, SqlFunctionTest.class}) |
| public class TestStringDistanceFunctions extends ClusterTest { |
| |
| @BeforeClass |
| public static void setup() throws Exception { |
| ClusterFixtureBuilder builder = ClusterFixture.builder(dirTestWatcher); |
| startCluster(builder); |
| } |
| |
| @Test |
| public void testCosineDistance() throws Exception { |
| double result = queryBuilder() |
| .sql("select cosine_distance( 'Big car', 'red car' ) as distance FROM (VALUES(1))") |
| .singletonDouble(); |
| assertEquals(0.5000000000000001, result, 0.0); |
| } |
| |
| @Test |
| public void testHammingDistance() throws Exception { |
| double result = queryBuilder() |
| .sql("select hamming_distance( 'Big car', 'red car' ) as distance FROM (VALUES(1))") |
| .singletonDouble(); |
| assertEquals(3.0, result, 0.0); |
| } |
| |
| @Test |
| public void testJaccardDistance() throws Exception { |
| double result = queryBuilder() |
| .sql("select jaccard_distance( 'Big car', 'red car' ) as distance FROM (VALUES(1))") |
| .singletonDouble(); |
| assertEquals(0.5555555555555556, result, 0.0); |
| } |
| |
| @Test |
| public void testJaroDistance() throws Exception { |
| double result = queryBuilder() |
| .sql("select jaro_distance( 'Big car', 'red car' ) as distance FROM (VALUES(1))") |
| .singletonDouble(); |
| assertEquals(0.2857142857142857, result, 0.0); |
| } |
| |
| @Test |
| public void testLevenshteinDistance() throws Exception { |
| double result = queryBuilder() |
| .sql("select levenshtein_distance( 'Big car', 'red car' ) as distance FROM (VALUES(1))") |
| .singletonDouble(); |
| assertEquals(3.0, result, 0.0); |
| } |
| } |