145 lines
5.9 KiB
C#
145 lines
5.9 KiB
C#
/*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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using NUnit.Framework;
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using SpellChecker.Net.Search.Spell;
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namespace SpellChecker.Net.Test.Search.Spell
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{
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[TestFixture]
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public class TestNGramDistance
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{
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[Test]
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public void TestGetDistance1()
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{
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StringDistance nsd = new NGramDistance(1);
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float d = nsd.GetDistance("al", "al");
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Assert.AreEqual(d, 1.0f, 0.001);
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d = nsd.GetDistance("a", "a");
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Assert.AreEqual(d, 1.0f, 0.001);
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d = nsd.GetDistance("b", "a");
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Assert.AreEqual(d, 0.0f, 0.001);
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d = nsd.GetDistance("martha", "marhta");
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Assert.AreEqual(d, 0.6666, 0.001);
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d = nsd.GetDistance("jones", "johnson");
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Assert.AreEqual(d, 0.4285, 0.001);
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d = nsd.GetDistance("natural", "contrary");
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Assert.AreEqual(d, 0.25, 0.001);
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d = nsd.GetDistance("abcvwxyz", "cabvwxyz");
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Assert.AreEqual(d, 0.75, 0.001);
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d = nsd.GetDistance("dwayne", "duane");
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Assert.AreEqual(d, 0.666, 0.001);
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d = nsd.GetDistance("dixon", "dicksonx");
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Assert.AreEqual(d, 0.5, 0.001);
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d = nsd.GetDistance("six", "ten");
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Assert.AreEqual(d, 0, 0.001);
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float d1 = nsd.GetDistance("zac ephron", "zac efron");
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float d2 = nsd.GetDistance("zac ephron", "kai ephron");
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Assert.AreEqual(d1, d2, 0.001);
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d1 = nsd.GetDistance("brittney spears", "britney spears");
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d2 = nsd.GetDistance("brittney spears", "brittney startzman");
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Assert.IsTrue(d1 > d2);
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d1 = nsd.GetDistance("12345678", "12890678");
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d2 = nsd.GetDistance("12345678", "72385698");
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Assert.AreEqual(d1, d2, 001);
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}
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[Test]
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public void TestGetDistance2()
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{
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StringDistance sd = new NGramDistance(2);
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float d = sd.GetDistance("al", "al");
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Assert.AreEqual(d, 1.0f, 0.001);
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d = sd.GetDistance("a", "a");
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Assert.AreEqual(d, 1.0f, 0.001);
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d = sd.GetDistance("b", "a");
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Assert.AreEqual(d, 0.0f, 0.001);
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d = sd.GetDistance("a", "aa");
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Assert.AreEqual(d, 0.5f, 0.001);
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d = sd.GetDistance("martha", "marhta");
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Assert.AreEqual(d, 0.6666, 0.001);
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d = sd.GetDistance("jones", "johnson");
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Assert.AreEqual(d, 0.4285, 0.001);
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d = sd.GetDistance("natural", "contrary");
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Assert.AreEqual(d, 0.25, 0.001);
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d = sd.GetDistance("abcvwxyz", "cabvwxyz");
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Assert.AreEqual(d, 0.625, 0.001);
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d = sd.GetDistance("dwayne", "duane");
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Assert.AreEqual(d, 0.5833, 0.001);
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d = sd.GetDistance("dixon", "dicksonx");
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Assert.AreEqual(d, 0.5, 0.001);
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d = sd.GetDistance("six", "ten");
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Assert.AreEqual(d, 0, 0.001);
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float d1 = sd.GetDistance("zac ephron", "zac efron");
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float d2 = sd.GetDistance("zac ephron", "kai ephron");
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Assert.IsTrue(d1 > d2);
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d1 = sd.GetDistance("brittney spears", "britney spears");
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d2 = sd.GetDistance("brittney spears", "brittney startzman");
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Assert.IsTrue(d1 > d2);
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d1 = sd.GetDistance("0012345678", "0012890678");
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d2 = sd.GetDistance("0012345678", "0072385698");
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Assert.AreEqual(d1, d2, 0.001);
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}
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[Test]
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public void TestGetDistance3()
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{
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StringDistance sd = new NGramDistance(3);
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float d = sd.GetDistance("al", "al");
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Assert.AreEqual(d, 1.0f, 0.001);
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d = sd.GetDistance("a", "a");
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Assert.AreEqual(d, 1.0f, 0.001);
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d = sd.GetDistance("b", "a");
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Assert.AreEqual(d, 0.0f, 0.001);
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d = sd.GetDistance("martha", "marhta");
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Assert.AreEqual(d, 0.7222, 0.001);
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d = sd.GetDistance("jones", "johnson");
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Assert.AreEqual(d, 0.4762, 0.001);
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d = sd.GetDistance("natural", "contrary");
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Assert.AreEqual(d, 0.2083, 0.001);
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d = sd.GetDistance("abcvwxyz", "cabvwxyz");
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Assert.AreEqual(d, 0.5625, 0.001);
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d = sd.GetDistance("dwayne", "duane");
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Assert.AreEqual(d, 0.5277, 0.001);
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d = sd.GetDistance("dixon", "dicksonx");
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Assert.AreEqual(d, 0.4583, 0.001);
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d = sd.GetDistance("six", "ten");
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Assert.AreEqual(d, 0, 0.001);
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float d1 = sd.GetDistance("zac ephron", "zac efron");
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float d2 = sd.GetDistance("zac ephron", "kai ephron");
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Assert.IsTrue(d1 > d2);
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d1 = sd.GetDistance("brittney spears", "britney spears");
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d2 = sd.GetDistance("brittney spears", "brittney startzman");
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Assert.IsTrue(d1 > d2);
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d1 = sd.GetDistance("0012345678", "0012890678");
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d2 = sd.GetDistance("0012345678", "0072385698");
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Assert.IsTrue(d1 < d2);
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}
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public void TestEmpty()
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{
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StringDistance nsd = new NGramDistance(1);
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float d = nsd.GetDistance("", "al");
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Assert.AreEqual(d, 0.0f, 0.001);
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}
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}
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}
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