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/*
* Copyright (C) 2009 The Android Open Source Project
*
* Licensed 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 com.android.providers.contacts.aggregation.util;
import android.test.suitebuilder.annotation.SmallTest;
import com.android.providers.contacts.NameNormalizer;
import com.android.providers.contacts.util.Hex;
import junit.framework.TestCase;
/**
* Unit tests for {@link NameDistance}.
*
* Run the test like this:
* <code>
* adb shell am instrument -e class com.android.providers.contacts.NameDistanceTest -w \
* com.android.providers.contacts.tests/android.test.InstrumentationTestRunner
* </code>
*/
@SmallTest
public class NameDistanceTest extends TestCase {
private NameDistance mNameDistance;
@Override
protected void setUp() throws Exception {
super.setUp();
mNameDistance = new NameDistance(30);
}
public void testExactMatch() {
assertFloat(1, "Dwayne", "Dwayne");
}
public void testWinklerBonus() {
assertFloat(0.961f, "Martha", "Marhta");
assertFloat(0.840f, "Dwayne", "Duane");
assertFloat(0.813f, "DIXON", "DICKSONX");
}
public void testJaroDistance() {
assertFloat(0.600f, "Donny", "Duane");
}
public void testPoorMatch() {
assertFloat(0.467f, "Johny", "Duane");
}
public void testNoMatches() {
assertFloat(0, "Abcd", "Efgh");
}
private void assertFloat(float expected, String name1, String name2) {
byte[] s1 = Hex.decodeHex(NameNormalizer.normalize(name1));
byte[] s2 = Hex.decodeHex(NameNormalizer.normalize(name2));
float actual = mNameDistance.getDistance(s1, s2);
assertTrue("Expected Jaro-Winkler distance: " + expected + ", actual: " + actual,
Math.abs(actual - expected) < 0.001);
}
}
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