1 package org.apache.lucene.analysis.cz;
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20 import java.io.IOException;
21 import java.io.StringReader;
23 import org.apache.lucene.analysis.BaseTokenStreamTestCase;
24 import org.apache.lucene.analysis.CharArraySet;
25 import org.apache.lucene.analysis.KeywordMarkerFilter;
26 import org.apache.lucene.analysis.MockTokenizer;
29 * Test the Czech Stemmer.
31 * Note: its algorithmic, so some stems are nonsense
34 public class TestCzechStemmer extends BaseTokenStreamTestCase {
37 * Test showing how masculine noun forms conflate
39 public void testMasculineNouns() throws IOException {
40 CzechAnalyzer cz = new CzechAnalyzer(TEST_VERSION_CURRENT);
42 /* animate ending with a hard consonant */
43 assertAnalyzesTo(cz, "pán", new String[] { "pán" });
44 assertAnalyzesTo(cz, "páni", new String[] { "pán" });
45 assertAnalyzesTo(cz, "pánové", new String[] { "pán" });
46 assertAnalyzesTo(cz, "pána", new String[] { "pán" });
47 assertAnalyzesTo(cz, "pánů", new String[] { "pán" });
48 assertAnalyzesTo(cz, "pánovi", new String[] { "pán" });
49 assertAnalyzesTo(cz, "pánům", new String[] { "pán" });
50 assertAnalyzesTo(cz, "pány", new String[] { "pán" });
51 assertAnalyzesTo(cz, "páne", new String[] { "pán" });
52 assertAnalyzesTo(cz, "pánech", new String[] { "pán" });
53 assertAnalyzesTo(cz, "pánem", new String[] { "pán" });
55 /* inanimate ending with hard consonant */
56 assertAnalyzesTo(cz, "hrad", new String[] { "hrad" });
57 assertAnalyzesTo(cz, "hradu", new String[] { "hrad" });
58 assertAnalyzesTo(cz, "hrade", new String[] { "hrad" });
59 assertAnalyzesTo(cz, "hradem", new String[] { "hrad" });
60 assertAnalyzesTo(cz, "hrady", new String[] { "hrad" });
61 assertAnalyzesTo(cz, "hradech", new String[] { "hrad" });
62 assertAnalyzesTo(cz, "hradům", new String[] { "hrad" });
63 assertAnalyzesTo(cz, "hradů", new String[] { "hrad" });
65 /* animate ending with a soft consonant */
66 assertAnalyzesTo(cz, "muž", new String[] { "muh" });
67 assertAnalyzesTo(cz, "muži", new String[] { "muh" });
68 assertAnalyzesTo(cz, "muže", new String[] { "muh" });
69 assertAnalyzesTo(cz, "mužů", new String[] { "muh" });
70 assertAnalyzesTo(cz, "mužům", new String[] { "muh" });
71 assertAnalyzesTo(cz, "mužích", new String[] { "muh" });
72 assertAnalyzesTo(cz, "mužem", new String[] { "muh" });
74 /* inanimate ending with a soft consonant */
75 assertAnalyzesTo(cz, "stroj", new String[] { "stroj" });
76 assertAnalyzesTo(cz, "stroje", new String[] { "stroj" });
77 assertAnalyzesTo(cz, "strojů", new String[] { "stroj" });
78 assertAnalyzesTo(cz, "stroji", new String[] { "stroj" });
79 assertAnalyzesTo(cz, "strojům", new String[] { "stroj" });
80 assertAnalyzesTo(cz, "strojích", new String[] { "stroj" });
81 assertAnalyzesTo(cz, "strojem", new String[] { "stroj" });
84 assertAnalyzesTo(cz, "předseda", new String[] { "předsd" });
85 assertAnalyzesTo(cz, "předsedové", new String[] { "předsd" });
86 assertAnalyzesTo(cz, "předsedy", new String[] { "předsd" });
87 assertAnalyzesTo(cz, "předsedů", new String[] { "předsd" });
88 assertAnalyzesTo(cz, "předsedovi", new String[] { "předsd" });
89 assertAnalyzesTo(cz, "předsedům", new String[] { "předsd" });
90 assertAnalyzesTo(cz, "předsedu", new String[] { "předsd" });
91 assertAnalyzesTo(cz, "předsedo", new String[] { "předsd" });
92 assertAnalyzesTo(cz, "předsedech", new String[] { "předsd" });
93 assertAnalyzesTo(cz, "předsedou", new String[] { "předsd" });
96 assertAnalyzesTo(cz, "soudce", new String[] { "soudk" });
97 assertAnalyzesTo(cz, "soudci", new String[] { "soudk" });
98 assertAnalyzesTo(cz, "soudců", new String[] { "soudk" });
99 assertAnalyzesTo(cz, "soudcům", new String[] { "soudk" });
100 assertAnalyzesTo(cz, "soudcích", new String[] { "soudk" });
101 assertAnalyzesTo(cz, "soudcem", new String[] { "soudk" });
105 * Test showing how feminine noun forms conflate
107 public void testFeminineNouns() throws IOException {
108 CzechAnalyzer cz = new CzechAnalyzer(TEST_VERSION_CURRENT);
110 /* ending with hard consonant */
111 assertAnalyzesTo(cz, "kost", new String[] { "kost" });
112 assertAnalyzesTo(cz, "kosti", new String[] { "kost" });
113 assertAnalyzesTo(cz, "kostí", new String[] { "kost" });
114 assertAnalyzesTo(cz, "kostem", new String[] { "kost" });
115 assertAnalyzesTo(cz, "kostech", new String[] { "kost" });
116 assertAnalyzesTo(cz, "kostmi", new String[] { "kost" });
118 /* ending with a soft consonant */
119 // note: in this example sing nom. and sing acc. don't conflate w/ the rest
120 assertAnalyzesTo(cz, "píseň", new String[] { "písň" });
121 assertAnalyzesTo(cz, "písně", new String[] { "písn" });
122 assertAnalyzesTo(cz, "písni", new String[] { "písn" });
123 assertAnalyzesTo(cz, "písněmi", new String[] { "písn" });
124 assertAnalyzesTo(cz, "písních", new String[] { "písn" });
125 assertAnalyzesTo(cz, "písním", new String[] { "písn" });
128 assertAnalyzesTo(cz, "růže", new String[] { "růh" });
129 assertAnalyzesTo(cz, "růží", new String[] { "růh" });
130 assertAnalyzesTo(cz, "růžím", new String[] { "růh" });
131 assertAnalyzesTo(cz, "růžích", new String[] { "růh" });
132 assertAnalyzesTo(cz, "růžemi", new String[] { "růh" });
133 assertAnalyzesTo(cz, "růži", new String[] { "růh" });
136 assertAnalyzesTo(cz, "žena", new String[] { "žn" });
137 assertAnalyzesTo(cz, "ženy", new String[] { "žn" });
138 assertAnalyzesTo(cz, "žen", new String[] { "žn" });
139 assertAnalyzesTo(cz, "ženě", new String[] { "žn" });
140 assertAnalyzesTo(cz, "ženám", new String[] { "žn" });
141 assertAnalyzesTo(cz, "ženu", new String[] { "žn" });
142 assertAnalyzesTo(cz, "ženo", new String[] { "žn" });
143 assertAnalyzesTo(cz, "ženách", new String[] { "žn" });
144 assertAnalyzesTo(cz, "ženou", new String[] { "žn" });
145 assertAnalyzesTo(cz, "ženami", new String[] { "žn" });
149 * Test showing how neuter noun forms conflate
151 public void testNeuterNouns() throws IOException {
152 CzechAnalyzer cz = new CzechAnalyzer(TEST_VERSION_CURRENT);
155 assertAnalyzesTo(cz, "město", new String[] { "měst" });
156 assertAnalyzesTo(cz, "města", new String[] { "měst" });
157 assertAnalyzesTo(cz, "měst", new String[] { "měst" });
158 assertAnalyzesTo(cz, "městu", new String[] { "měst" });
159 assertAnalyzesTo(cz, "městům", new String[] { "měst" });
160 assertAnalyzesTo(cz, "městě", new String[] { "měst" });
161 assertAnalyzesTo(cz, "městech", new String[] { "měst" });
162 assertAnalyzesTo(cz, "městem", new String[] { "měst" });
163 assertAnalyzesTo(cz, "městy", new String[] { "měst" });
166 assertAnalyzesTo(cz, "moře", new String[] { "moř" });
167 assertAnalyzesTo(cz, "moří", new String[] { "moř" });
168 assertAnalyzesTo(cz, "mořím", new String[] { "moř" });
169 assertAnalyzesTo(cz, "moři", new String[] { "moř" });
170 assertAnalyzesTo(cz, "mořích", new String[] { "moř" });
171 assertAnalyzesTo(cz, "mořem", new String[] { "moř" });
174 assertAnalyzesTo(cz, "kuře", new String[] { "kuř" });
175 assertAnalyzesTo(cz, "kuřata", new String[] { "kuř" });
176 assertAnalyzesTo(cz, "kuřete", new String[] { "kuř" });
177 assertAnalyzesTo(cz, "kuřat", new String[] { "kuř" });
178 assertAnalyzesTo(cz, "kuřeti", new String[] { "kuř" });
179 assertAnalyzesTo(cz, "kuřatům", new String[] { "kuř" });
180 assertAnalyzesTo(cz, "kuřatech", new String[] { "kuř" });
181 assertAnalyzesTo(cz, "kuřetem", new String[] { "kuř" });
182 assertAnalyzesTo(cz, "kuřaty", new String[] { "kuř" });
185 assertAnalyzesTo(cz, "stavení", new String[] { "stavn" });
186 assertAnalyzesTo(cz, "stavením", new String[] { "stavn" });
187 assertAnalyzesTo(cz, "staveních", new String[] { "stavn" });
188 assertAnalyzesTo(cz, "staveními", new String[] { "stavn" });
192 * Test showing how adjectival forms conflate
194 public void testAdjectives() throws IOException {
195 CzechAnalyzer cz = new CzechAnalyzer(TEST_VERSION_CURRENT);
197 /* ending with ý/á/é */
198 assertAnalyzesTo(cz, "mladý", new String[] { "mlad" });
199 assertAnalyzesTo(cz, "mladí", new String[] { "mlad" });
200 assertAnalyzesTo(cz, "mladého", new String[] { "mlad" });
201 assertAnalyzesTo(cz, "mladých", new String[] { "mlad" });
202 assertAnalyzesTo(cz, "mladému", new String[] { "mlad" });
203 assertAnalyzesTo(cz, "mladým", new String[] { "mlad" });
204 assertAnalyzesTo(cz, "mladé", new String[] { "mlad" });
205 assertAnalyzesTo(cz, "mladém", new String[] { "mlad" });
206 assertAnalyzesTo(cz, "mladými", new String[] { "mlad" });
207 assertAnalyzesTo(cz, "mladá", new String[] { "mlad" });
208 assertAnalyzesTo(cz, "mladou", new String[] { "mlad" });
211 assertAnalyzesTo(cz, "jarní", new String[] { "jarn" });
212 assertAnalyzesTo(cz, "jarního", new String[] { "jarn" });
213 assertAnalyzesTo(cz, "jarních", new String[] { "jarn" });
214 assertAnalyzesTo(cz, "jarnímu", new String[] { "jarn" });
215 assertAnalyzesTo(cz, "jarním", new String[] { "jarn" });
216 assertAnalyzesTo(cz, "jarními", new String[] { "jarn" });
220 * Test some possessive suffixes
222 public void testPossessive() throws IOException {
223 CzechAnalyzer cz = new CzechAnalyzer(TEST_VERSION_CURRENT);
224 assertAnalyzesTo(cz, "Karlův", new String[] { "karl" });
225 assertAnalyzesTo(cz, "jazykový", new String[] { "jazyk" });
229 * Test some exceptional rules, implemented as rewrites.
231 public void testExceptions() throws IOException {
232 CzechAnalyzer cz = new CzechAnalyzer(TEST_VERSION_CURRENT);
234 /* rewrite of št -> sk */
235 assertAnalyzesTo(cz, "český", new String[] { "česk" });
236 assertAnalyzesTo(cz, "čeští", new String[] { "česk" });
238 /* rewrite of čt -> ck */
239 assertAnalyzesTo(cz, "anglický", new String[] { "anglick" });
240 assertAnalyzesTo(cz, "angličtí", new String[] { "anglick" });
242 /* rewrite of z -> h */
243 assertAnalyzesTo(cz, "kniha", new String[] { "knih" });
244 assertAnalyzesTo(cz, "knize", new String[] { "knih" });
246 /* rewrite of ž -> h */
247 assertAnalyzesTo(cz, "mazat", new String[] { "mah" });
248 assertAnalyzesTo(cz, "mažu", new String[] { "mah" });
250 /* rewrite of c -> k */
251 assertAnalyzesTo(cz, "kluk", new String[] { "kluk" });
252 assertAnalyzesTo(cz, "kluci", new String[] { "kluk" });
253 assertAnalyzesTo(cz, "klucích", new String[] { "kluk" });
255 /* rewrite of č -> k */
256 assertAnalyzesTo(cz, "hezký", new String[] { "hezk" });
257 assertAnalyzesTo(cz, "hezčí", new String[] { "hezk" });
259 /* rewrite of *ů* -> *o* */
260 assertAnalyzesTo(cz, "hůl", new String[] { "hol" });
261 assertAnalyzesTo(cz, "hole", new String[] { "hol" });
263 /* rewrite of e* -> * */
264 assertAnalyzesTo(cz, "deska", new String[] { "desk" });
265 assertAnalyzesTo(cz, "desek", new String[] { "desk" });
269 * Test that very short words are not stemmed.
271 public void testDontStem() throws IOException {
272 CzechAnalyzer cz = new CzechAnalyzer(TEST_VERSION_CURRENT);
273 assertAnalyzesTo(cz, "e", new String[] { "e" });
274 assertAnalyzesTo(cz, "zi", new String[] { "zi" });
277 public void testWithKeywordAttribute() throws IOException {
278 CharArraySet set = new CharArraySet(TEST_VERSION_CURRENT, 1, true);
280 CzechStemFilter filter = new CzechStemFilter(new KeywordMarkerFilter(
281 new MockTokenizer(new StringReader("hole desek"), MockTokenizer.WHITESPACE, false), set));
282 assertTokenStreamContents(filter, new String[] { "hole", "desk" });