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* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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 org.apache.lucene.analysis;
import java.io.Reader;
import java.io.StringReader;
import java.util.Arrays;
import java.util.Random;
import org.apache.lucene.document.Document;
import org.apache.lucene.document.Field;
import org.apache.lucene.document.FieldType;
import org.apache.lucene.index.PostingsEnum;
import org.apache.lucene.index.Fields;
import org.apache.lucene.index.IndexOptions;
import org.apache.lucene.index.LeafReader;
import org.apache.lucene.index.RandomIndexWriter;
import org.apache.lucene.index.Terms;
import org.apache.lucene.index.TermsEnum;
import org.apache.lucene.util.BytesRef;
import org.apache.lucene.util.TestUtil;
import org.apache.lucene.util.automaton.Automata;
import org.apache.lucene.util.automaton.AutomatonTestUtil;
import org.apache.lucene.util.automaton.CharacterRunAutomaton;
import org.apache.lucene.util.automaton.Operations;
import org.apache.lucene.util.automaton.RegExp;
import static org.apache.lucene.util.automaton.Operations.DEFAULT_MAX_DETERMINIZED_STATES;
public class TestMockAnalyzer extends BaseTokenStreamTestCase {
/** Test a configuration that behaves a lot like WhitespaceAnalyzer */
public void testWhitespace() throws Exception {
Analyzer a = new MockAnalyzer(random());
assertAnalyzesTo(a, "A bc defg hiJklmn opqrstuv wxy z ",
new String[] { "a", "bc", "defg", "hijklmn", "opqrstuv", "wxy", "z" });
assertAnalyzesTo(a, "aba cadaba shazam",
new String[] { "aba", "cadaba", "shazam" });
assertAnalyzesTo(a, "break on whitespace",
new String[] { "break", "on", "whitespace" });
}
/** Test a configuration that behaves a lot like SimpleAnalyzer */
public void testSimple() throws Exception {
Analyzer a = new MockAnalyzer(random(), MockTokenizer.SIMPLE, true);
assertAnalyzesTo(a, "a-bc123 defg+hijklmn567opqrstuv78wxy_z ",
new String[] { "a", "bc", "defg", "hijklmn", "opqrstuv", "wxy", "z" });
assertAnalyzesTo(a, "aba4cadaba-Shazam",
new String[] { "aba", "cadaba", "shazam" });
assertAnalyzesTo(a, "break+on/Letters",
new String[] { "break", "on", "letters" });
}
/** Test a configuration that behaves a lot like KeywordAnalyzer */
public void testKeyword() throws Exception {
Analyzer a = new MockAnalyzer(random(), MockTokenizer.KEYWORD, false);
assertAnalyzesTo(a, "a-bc123 defg+hijklmn567opqrstuv78wxy_z ",
new String[] { "a-bc123 defg+hijklmn567opqrstuv78wxy_z " });
assertAnalyzesTo(a, "aba4cadaba-Shazam",
new String[] { "aba4cadaba-Shazam" });
assertAnalyzesTo(a, "break+on/Nothing",
new String[] { "break+on/Nothing" });
// currently though emits no tokens for empty string: maybe we can do it,
// but we don't want to emit tokens infinitely...
assertAnalyzesTo(a, "", new String[0]);
}
// Test some regular expressions as tokenization patterns
/** Test a configuration where each character is a term */
public void testSingleChar() throws Exception {
CharacterRunAutomaton single =
new CharacterRunAutomaton(new RegExp(".").toAutomaton());
Analyzer a = new MockAnalyzer(random(), single, false);
assertAnalyzesTo(a, "foobar",
new String[] { "f", "o", "o", "b", "a", "r" },
new int[] { 0, 1, 2, 3, 4, 5 },
new int[] { 1, 2, 3, 4, 5, 6 }
);
checkRandomData(random(), a, 100);
}
/** Test a configuration where two characters makes a term */
public void testTwoChars() throws Exception {
CharacterRunAutomaton single =
new CharacterRunAutomaton(new RegExp("..").toAutomaton());
Analyzer a = new MockAnalyzer(random(), single, false);
assertAnalyzesTo(a, "foobar",
new String[] { "fo", "ob", "ar"},
new int[] { 0, 2, 4 },
new int[] { 2, 4, 6 }
);
// make sure when last term is a "partial" match that end() is correct
assertTokenStreamContents(a.tokenStream("bogus", "fooba"),
new String[] { "fo", "ob" },
new int[] { 0, 2 },
new int[] { 2, 4 },
new int[] { 1, 1 },
new Integer(5)
);
checkRandomData(random(), a, 100);
}
/** Test a configuration where three characters makes a term */
public void testThreeChars() throws Exception {
CharacterRunAutomaton single =
new CharacterRunAutomaton(new RegExp("...").toAutomaton());
Analyzer a = new MockAnalyzer(random(), single, false);
assertAnalyzesTo(a, "foobar",
new String[] { "foo", "bar"},
new int[] { 0, 3 },
new int[] { 3, 6 }
);
// make sure when last term is a "partial" match that end() is correct
assertTokenStreamContents(a.tokenStream("bogus", "fooba"),
new String[] { "foo" },
new int[] { 0 },
new int[] { 3 },
new int[] { 1 },
new Integer(5)
);
checkRandomData(random(), a, 100);
}
/** Test a configuration where word starts with one uppercase */
public void testUppercase() throws Exception {
CharacterRunAutomaton single =
new CharacterRunAutomaton(new RegExp("[A-Z][a-z]*").toAutomaton());
Analyzer a = new MockAnalyzer(random(), single, false);
assertAnalyzesTo(a, "FooBarBAZ",
new String[] { "Foo", "Bar", "B", "A", "Z"},
new int[] { 0, 3, 6, 7, 8 },
new int[] { 3, 6, 7, 8, 9 }
);
assertAnalyzesTo(a, "aFooBar",
new String[] { "Foo", "Bar" },
new int[] { 1, 4 },
new int[] { 4, 7 }
);
checkRandomData(random(), a, 100);
}
/** Test a configuration that behaves a lot like StopAnalyzer */
public void testStop() throws Exception {
Analyzer a = new MockAnalyzer(random(), MockTokenizer.SIMPLE, true, MockTokenFilter.ENGLISH_STOPSET);
assertAnalyzesTo(a, "the quick brown a fox",
new String[] { "quick", "brown", "fox" },
new int[] { 2, 1, 2 });
}
/** Test a configuration that behaves a lot like KeepWordFilter */
public void testKeep() throws Exception {
CharacterRunAutomaton keepWords =
new CharacterRunAutomaton(
Operations.complement(
Operations.union(
Arrays.asList(Automata.makeString("foo"), Automata.makeString("bar"))),
DEFAULT_MAX_DETERMINIZED_STATES));
Analyzer a = new MockAnalyzer(random(), MockTokenizer.SIMPLE, true, keepWords);
assertAnalyzesTo(a, "quick foo brown bar bar fox foo",
new String[] { "foo", "bar", "bar", "foo" },
new int[] { 2, 2, 1, 2 });
}
/** Test a configuration that behaves a lot like LengthFilter */
public void testLength() throws Exception {
CharacterRunAutomaton length5 = new CharacterRunAutomaton(new RegExp(".{5,}").toAutomaton());
Analyzer a = new MockAnalyzer(random(), MockTokenizer.WHITESPACE, true, length5);
assertAnalyzesTo(a, "ok toolong fine notfine",
new String[] { "ok", "fine" },
new int[] { 1, 2 });
}
/** Test MockTokenizer encountering a too long token */
public void testTooLongToken() throws Exception {
Analyzer whitespace = new Analyzer() {
@Override
protected TokenStreamComponents createComponents(String fieldName) {
Tokenizer t = new MockTokenizer(MockTokenizer.WHITESPACE, false, 5);
return new TokenStreamComponents(t, t);
}
};
assertTokenStreamContents(whitespace.tokenStream("bogus", "test 123 toolong ok "),
new String[] { "test", "123", "toolo", "ng", "ok" },
new int[] { 0, 5, 9, 14, 17 },
new int[] { 4, 8, 14, 16, 19 },
new Integer(20));
assertTokenStreamContents(whitespace.tokenStream("bogus", "test 123 toolo"),
new String[] { "test", "123", "toolo" },
new int[] { 0, 5, 9 },
new int[] { 4, 8, 14 },
new Integer(14));
}
public void testLUCENE_3042() throws Exception {
String testString = "t";
Analyzer analyzer = new MockAnalyzer(random());
try (TokenStream stream = analyzer.tokenStream("dummy", testString)) {
stream.reset();
while (stream.incrementToken()) {
// consume
}
stream.end();
}
assertAnalyzesTo(analyzer, testString, new String[] { "t" });
}
/** blast some random strings through the analyzer */
public void testRandomStrings() throws Exception {
checkRandomData(random(), new MockAnalyzer(random()), atLeast(1000));
}
/** blast some random strings through differently configured tokenizers */
public void testRandomRegexps() throws Exception {
int iters = TEST_NIGHTLY ? atLeast(30) : atLeast(1);
for (int i = 0; i < iters; i++) {
final CharacterRunAutomaton dfa = new CharacterRunAutomaton(AutomatonTestUtil.randomAutomaton(random()), Integer.MAX_VALUE);
final boolean lowercase = random().nextBoolean();
final int limit = TestUtil.nextInt(random(), 0, 500);
Analyzer a = new Analyzer() {
@Override
protected TokenStreamComponents createComponents(String fieldName) {
Tokenizer t = new MockTokenizer(dfa, lowercase, limit);
return new TokenStreamComponents(t, t);
}
};
checkRandomData(random(), a, 100);
a.close();
}
}
public void testForwardOffsets() throws Exception {
int num = atLeast(1000);
for (int i = 0; i < num; i++) {
String s = TestUtil.randomHtmlishString(random(), 20);
StringReader reader = new StringReader(s);
MockCharFilter charfilter = new MockCharFilter(reader, 2);
MockAnalyzer analyzer = new MockAnalyzer(random());
try (TokenStream ts = analyzer.tokenStream("bogus", charfilter)) {
ts.reset();
while (ts.incrementToken()) {
;
}
ts.end();
}
}
}
public void testWrapReader() throws Exception {
// LUCENE-5153: test that wrapping an analyzer's reader is allowed
final Random random = random();
final Analyzer delegate = new MockAnalyzer(random);
Analyzer a = new AnalyzerWrapper(delegate.getReuseStrategy()) {
@Override
protected Reader wrapReader(String fieldName, Reader reader) {
return new MockCharFilter(reader, 7);
}
@Override
protected Analyzer getWrappedAnalyzer(String fieldName) {
return delegate;
}
};
checkOneTerm(a, "abc", "aabc");
}
public void testChangeGaps() throws Exception {
// LUCENE-5324: check that it is possible to change the wrapper's gaps
final int positionGap = random().nextInt(1000);
final int offsetGap = random().nextInt(1000);
final Analyzer delegate = new MockAnalyzer(random());
final Analyzer a = new DelegatingAnalyzerWrapper(delegate.getReuseStrategy()) {
@Override
protected Analyzer getWrappedAnalyzer(String fieldName) {
return delegate;
}
@Override
public int getPositionIncrementGap(String fieldName) {
return positionGap;
}
@Override
public int getOffsetGap(String fieldName) {
return offsetGap;
}
};
final RandomIndexWriter writer = new RandomIndexWriter(random(), newDirectory(), a);
final Document doc = new Document();
final FieldType ft = new FieldType();
ft.setIndexOptions(IndexOptions.DOCS);
ft.setTokenized(true);
ft.setStoreTermVectors(true);
ft.setStoreTermVectorPositions(true);
ft.setStoreTermVectorOffsets(true);
doc.add(new Field("f", "a", ft));
doc.add(new Field("f", "a", ft));
writer.addDocument(doc);
final LeafReader reader = getOnlyLeafReader(writer.getReader());
final Fields fields = reader.getTermVectors(0);
final Terms terms = fields.terms("f");
final TermsEnum te = terms.iterator();
assertEquals(new BytesRef("a"), te.next());
final PostingsEnum dpe = te.postings(null, PostingsEnum.ALL);
assertEquals(0, dpe.nextDoc());
assertEquals(2, dpe.freq());
assertEquals(0, dpe.nextPosition());
assertEquals(0, dpe.startOffset());
final int endOffset = dpe.endOffset();
assertEquals(1 + positionGap, dpe.nextPosition());
assertEquals(1 + endOffset + offsetGap, dpe.endOffset());
assertEquals(null, te.next());
reader.close();
writer.close();
writer.w.getDirectory().close();
}
}