1/* 2 * Copyright (C) 2009 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License 15 */ 16 17package com.android.providers.contacts.aggregation.util; 18 19import android.test.suitebuilder.annotation.SmallTest; 20 21import com.android.providers.contacts.NameNormalizer; 22import com.android.providers.contacts.util.Hex; 23 24import junit.framework.TestCase; 25 26/** 27 * Unit tests for {@link NameDistance}. 28 * 29 * Run the test like this: 30 * <code> 31 * adb shell am instrument -e class com.android.providers.contacts.NameDistanceTest -w \ 32 * com.android.providers.contacts.tests/android.test.InstrumentationTestRunner 33 * </code> 34 */ 35@SmallTest 36public class NameDistanceTest extends TestCase { 37 38 private NameDistance mNameDistance; 39 40 @Override 41 protected void setUp() throws Exception { 42 super.setUp(); 43 44 mNameDistance = new NameDistance(30); 45 } 46 47 public void testExactMatch() { 48 assertFloat(1, "Dwayne", "Dwayne"); 49 } 50 51 public void testWinklerBonus() { 52 assertFloat(0.961f, "Martha", "Marhta"); 53 assertFloat(0.840f, "Dwayne", "Duane"); 54 assertFloat(0.813f, "DIXON", "DICKSONX"); 55 } 56 57 public void testJaroDistance() { 58 assertFloat(0.600f, "Donny", "Duane"); 59 } 60 61 public void testPoorMatch() { 62 assertFloat(0.467f, "Johny", "Duane"); 63 } 64 65 public void testNoMatches() { 66 assertFloat(0, "Abcd", "Efgh"); 67 } 68 69 private void assertFloat(float expected, String name1, String name2) { 70 byte[] s1 = Hex.decodeHex(NameNormalizer.normalize(name1)); 71 byte[] s2 = Hex.decodeHex(NameNormalizer.normalize(name2)); 72 73 float actual = mNameDistance.getDistance(s1, s2); 74 assertTrue("Expected Jaro-Winkler distance: " + expected + ", actual: " + actual, 75 Math.abs(actual - expected) < 0.001); 76 } 77} 78