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Diffstat (limited to 'linguistics/src/test/java/com/yahoo/language/opennlp/OpenNlpTokenizationTestCase.java')
| -rw-r--r-- | linguistics/src/test/java/com/yahoo/language/opennlp/OpenNlpTokenizationTestCase.java | 237 |
1 files changed, 237 insertions, 0 deletions
diff --git a/linguistics/src/test/java/com/yahoo/language/opennlp/OpenNlpTokenizationTestCase.java b/linguistics/src/test/java/com/yahoo/language/opennlp/OpenNlpTokenizationTestCase.java new file mode 100644 index 00000000000..914e3817568 --- /dev/null +++ b/linguistics/src/test/java/com/yahoo/language/opennlp/OpenNlpTokenizationTestCase.java @@ -0,0 +1,237 @@ +// Copyright 2017 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root. +package com.yahoo.language.opennlp; + +import com.yahoo.language.Language; +import com.yahoo.language.process.StemMode; +import com.yahoo.language.process.Token; +import com.yahoo.language.process.Tokenizer; +import org.junit.Test; + +import java.util.*; + +import static com.yahoo.language.LinguisticsCase.toLowerCase; +import static org.hamcrest.CoreMatchers.is; +import static org.junit.Assert.*; + +/** + * Test of tokenization, with stemming and accent removal + * + * @author <a href="mailto:mathiasm@yahoo-inc.com">Mathias Mølster Lidal</a> + */ +public class OpenNlpTokenizationTestCase { + + private final Tokenizer tokenizer = new OpenNlpTokenizer(); + + @Test + public void testTokenizer() { + assertTokenize("This is a test, 123", + Arrays.asList("this", "is", "a", "test", "123"), + Arrays.asList("This", " ", "is", " ", "a", " ", "test", ",", " ", "123")); + } + + @Test + public void testUnderScoreTokenization() { + assertTokenize("ugcapi_1", Language.ENGLISH, StemMode.SHORTEST, true, Arrays.asList("ugcapi", "1"), null); + } + + @Test + public void testPhrasesWithPunctuation() { + assertTokenize("PHY_101.html a space/time or space-time course", Language.ENGLISH, StemMode.NONE, + false, + Arrays.asList("phy", "101", "html", "a", "space", "time", "or", "space", "time", "course"), + null); + assertTokenize("PHY_101.", Language.ENGLISH, StemMode.NONE, false, Arrays.asList("phy", "101"), null); + assertTokenize("101.3", Language.ENGLISH, StemMode.NONE, false, Arrays.asList("101", "3"), null); + } + + @Test + public void testDoubleWidthTokenization() { + // "sony" + assertTokenize("\uFF53\uFF4F\uFF4E\uFF59", Language.ENGLISH, StemMode.NONE, false, + Arrays.asList("sony"), null); + assertTokenize("\uFF53\uFF4F\uFF4E\uFF59", Language.ENGLISH, StemMode.SHORTEST, false, + Arrays.asList("sony"), null); + // "SONY" + assertTokenize("\uFF33\uFF2F\uFF2E\uFF39", Language.ENGLISH, StemMode.NONE, false, + Arrays.asList("sony"), null); + assertTokenize("\uFF33\uFF2F\uFF2E\uFF39", Language.ENGLISH, StemMode.SHORTEST, false, + Arrays.asList("sony"), null); + // "on" + assertTokenize("\uFF4F\uFF4E", Language.ENGLISH, StemMode.NONE, false, + Arrays.asList("on"), null); + assertTokenize("\uFF4F\uFF4E", Language.ENGLISH, StemMode.SHORTEST, false, + Arrays.asList("on"), null); + // "ON" + assertTokenize("\uFF2F\uFF2E", Language.ENGLISH, StemMode.NONE, false, + Arrays.asList("on"), null); + assertTokenize("\uFF2F\uFF2E", Language.ENGLISH, StemMode.SHORTEST, false, + Arrays.asList("on"), null); + assertTokenize("наименование", Language.RUSSIAN, StemMode.SHORTEST, false, + Arrays.asList("наименован"), null); + } + + @Test + public void testLargeTextTokenization() { + StringBuilder sb = new StringBuilder(); + String s = "teststring "; + for (int i = 0; i < 100000; i++) { + sb.append(s); + } + + String input = sb.toString(); + + int numTokens = 0; + List<Long> pos = new ArrayList<>(); + for (Token t : tokenizer.tokenize(input, Language.ENGLISH, StemMode.NONE, false)) { + numTokens++; + if ((numTokens % 100) == 0) { + pos.add(t.getOffset()); + } + } + + assertEquals("Check that all tokens have been tokenized", numTokens, 200000); + assertTrue("Increasing token pos", assertMonoIncr(pos)); + } + + @Test + public void testLargeTokenGuard() { + StringBuilder str = new StringBuilder(); + for (int i = 0; i < 128 * 256; i++) { + str.append("ab"); + } + Iterator<Token> it = tokenizer.tokenize(str.toString(), Language.ENGLISH, StemMode.NONE, false).iterator(); + assertTrue(it.hasNext()); + assertNotNull(it.next().getTokenString()); + assertFalse(it.hasNext()); + } + + @Test + public void testTokenIterator() { + Iterator<Token> it = tokenizer.tokenize("", Language.ENGLISH, StemMode.NONE, false).iterator(); + assertFalse(it.hasNext()); + try { + it.next(); + fail(); + } catch (NoSuchElementException e) { + // success + } + + it = tokenizer.tokenize("", Language.ENGLISH, StemMode.NONE, false).iterator(); + assertFalse(it.hasNext()); + + it = tokenizer.tokenize("one two three", Language.ENGLISH, StemMode.NONE, false).iterator(); + assertNotNull(it.next()); + assertNotNull(it.next()); + assertNotNull(it.next()); + assertNotNull(it.next()); + assertNotNull(it.next()); + assertFalse(it.hasNext()); + } + + @Test + public void testGetOffsetLength() { + String input = "Deka-Chef Weber r\u00e4umt Kommunikationsfehler ein"; + long[] expOffset = { 0, 4, 5, 9, 10, 15, 16, 21, 22, 42, 43 }; + int[] len = { 4, 1, 4, 1, 5, 1, 5, 1, 20, 1, 3 }; + + int idx = 0; + for (Token token : tokenizer.tokenize(input, Language.GERMAN, StemMode.SHORTEST, false)) { + assertThat("Token offset for token #" + idx, token.getOffset(), is(expOffset[idx])); + assertThat("Token len for token #" + idx, token.getOrig().length(), is(len[idx])); + idx++; + } + } + + @Test + public void testRecursiveDecompose() { + for (Token t : tokenizer.tokenize("\u00a510%", Language.ENGLISH, StemMode.SHORTEST, false)) { + recurseDecompose(t); + } + } + + @Test + public void testIndexability() { + String input = "tafsirnya\u0648\u0643\u064F\u0646\u0652"; + for (StemMode stemMode : new StemMode[] { StemMode.NONE, + StemMode.SHORTEST }) { + for (Language l : new Language[] { Language.INDONESIAN, + Language.ENGLISH, Language.ARABIC }) { + for (boolean accentDrop : new boolean[] { true, false }) { + for (Token token : tokenizer.tokenize(input, + l, stemMode, accentDrop)) { + if (token.getTokenString().length() == 0) { + assertFalse(token.isIndexable()); + } + } + } + } + } + } + + private void recurseDecompose(Token t) { + assertTrue(t.getOffset() >= 0); + assertTrue(t.getOrig().length() >= 0); + + int numComp = t.getNumComponents(); + for (int i = 0; i < numComp; i++) { + Token comp = t.getComponent(i); + recurseDecompose(comp); + } + } + + private boolean assertMonoIncr(Iterable<Long> n) { + long trailing = -1; + for (long i : n) { + if (i < trailing) { + return false; + } + trailing = i; + } + return true; + } + + private void assertTokenize(String input, List<String> indexed, List<String> orig) { + assertTokenize(input, Language.ENGLISH, StemMode.NONE, false, indexed, orig); + } + + /** + * <p>Compare the results of running an input string through the tokenizer with an "index" truth, and an optional + * "orig" truth.</p> + * + * @param input The text to process, passed to tokenizer. + * @param language The language tag, passed to tokenizer. + * @param stemMode If stemMode != NONE, test will silently succeed if tokenizer does not do stemming. + * @param accentDrop Passed to the tokenizer. + * @param indexed Compared to the "TokenString" result from the tokenizer. + * @param orig Compared to the "Orig" result from the tokenizer. + */ + private void assertTokenize(String input, Language language, StemMode stemMode, boolean accentDrop, + List<String> indexed, List<String> orig) { + int i = 0; + int j = 0; + for (Token token : tokenizer.tokenize(input, language, stemMode, accentDrop)) { + // System.err.println("got token orig '"+token.getOrig()+"'"); + // System.err.println("got token stem '"+token.getTokenString(stemMode)+"'"); + if (token.getNumComponents() > 0) { + for (int comp = 0; comp < token.getNumComponents(); comp++) { + Token t = token.getComponent(comp); + if (t.getType().isIndexable()) { + assertThat("comp index: " + i, toLowerCase(t.getTokenString()), is(indexed.get(i++))); + } + } + } else { + if (token.getType().isIndexable()) { + assertThat("exp index: " + i, toLowerCase(token.getTokenString()), is(indexed.get(i++))); + } + } + if (orig != null) { + assertThat("orig index: " + j, token.getOrig(), is(orig.get(j++))); + } + } + assertThat("indexed length", i, is(indexed.size())); + if (orig != null) { + assertThat("orig length", j, is(orig.size())); + } + } + +} |