107 lines
3.4 KiB
Java
107 lines
3.4 KiB
Java
/*
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* Copyright (C) 2010 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* 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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package com.android.inputmethod.latin;
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import android.test.AndroidTestCase;
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public class EditDistanceTests extends AndroidTestCase {
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@Override
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protected void setUp() throws Exception {
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super.setUp();
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}
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@Override
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protected void tearDown() throws Exception {
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super.tearDown();
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}
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/*
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* dist(kitten, sitting) == 3
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*
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* kitten-
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* .|||.|
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* sitting
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*/
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public void testExample1() {
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final int dist = LatinIMEUtil.editDistance("kitten", "sitting");
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assertEquals("edit distance between 'kitten' and 'sitting' is 3",
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3, dist);
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}
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/*
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* dist(Sunday, Saturday) == 3
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*
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* Saturday
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* | |.|||
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* S--unday
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*/
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public void testExample2() {
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final int dist = LatinIMEUtil.editDistance("Saturday", "Sunday");
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assertEquals("edit distance between 'Saturday' and 'Sunday' is 3",
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3, dist);
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}
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public void testBothEmpty() {
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final int dist = LatinIMEUtil.editDistance("", "");
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assertEquals("when both string are empty, no edits are needed",
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0, dist);
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}
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public void testFirstArgIsEmpty() {
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final int dist = LatinIMEUtil.editDistance("", "aaaa");
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assertEquals("when only one string of the arguments is empty,"
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+ " the edit distance is the length of the other.",
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4, dist);
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}
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public void testSecoondArgIsEmpty() {
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final int dist = LatinIMEUtil.editDistance("aaaa", "");
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assertEquals("when only one string of the arguments is empty,"
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+ " the edit distance is the length of the other.",
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4, dist);
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}
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public void testSameStrings() {
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final String arg1 = "The quick brown fox jumps over the lazy dog.";
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final String arg2 = "The quick brown fox jumps over the lazy dog.";
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final int dist = LatinIMEUtil.editDistance(arg1, arg2);
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assertEquals("when same strings are passed, distance equals 0.",
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0, dist);
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}
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public void testSameReference() {
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final String arg = "The quick brown fox jumps over the lazy dog.";
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final int dist = LatinIMEUtil.editDistance(arg, arg);
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assertEquals("when same string references are passed, the distance equals 0.",
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0, dist);
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}
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public void testNullArg() {
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try {
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LatinIMEUtil.editDistance(null, "aaa");
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fail("IllegalArgumentException should be thrown.");
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} catch (Exception e) {
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assertTrue(e instanceof IllegalArgumentException);
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}
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try {
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LatinIMEUtil.editDistance("aaa", null);
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fail("IllegalArgumentException should be thrown.");
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} catch (Exception e) {
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assertTrue(e instanceof IllegalArgumentException);
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}
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}
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}
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