org.apache.lucene.analysis

## Class BaseTokenStreamTestCase

- java.lang.Object
- - org.junit.Assert
  - - org.apache.lucene.util.LuceneTestCase
    - - org.apache.lucene.analysis.BaseTokenStreamTestCase

- Direct Known Subclasses:
    EmojiTokenizationTestUnicode_11_0, WordBreakTestUnicode_9_0_0

      public abstract class BaseTokenStreamTestCase
      extends LuceneTestCase

  Base class for all Lucene unit tests that use TokenStreams.

  When writing unit tests for analysis components, it's highly recommended to use the helper methods here (especially in conjunction with `MockAnalyzer` or `MockTokenizer`), as they contain many assertions and checks to catch bugs.

  See Also:
    `MockAnalyzer`, `MockTokenizer`

- - ### Nested Class Summary

    Nested Classes
    Modifier and Type | Class and Description
    --- | ---
    `static interface` | `BaseTokenStreamTestCase.CheckClearAttributesAttribute` Attribute that records if it was cleared or not.
    `static class` | `BaseTokenStreamTestCase.CheckClearAttributesAttributeImpl` Attribute that records if it was cleared or not.

    - ### Nested classes/interfaces inherited from class org.apache.lucene.util.LuceneTestCase

      `LuceneTestCase.AwaitsFix, LuceneTestCase.BadApple, LuceneTestCase.Monster, LuceneTestCase.Nightly, LuceneTestCase.Slow, LuceneTestCase.SuppressCodecs, LuceneTestCase.SuppressFileSystems, LuceneTestCase.SuppressFsync, LuceneTestCase.SuppressReproduceLine, LuceneTestCase.SuppressSysoutChecks, LuceneTestCase.SuppressTempFileChecks, LuceneTestCase.ThrowingRunnable, LuceneTestCase.Weekly`

  - ### Field Summary

    - ### Fields inherited from class org.apache.lucene.util.LuceneTestCase

      `assertsAreEnabled, classRules, DEFAULT_LINE_DOCS_FILE, INFOSTREAM, JENKINS_LARGE_LINE_DOCS_FILE, LEAVE_TEMPORARY, MAYBE_CACHE_POLICY, RANDOM_MULTIPLIER, ruleChain, suiteFailureMarker, SYSPROP_AWAITSFIX, SYSPROP_BADAPPLES, SYSPROP_FAILFAST, SYSPROP_MAXFAILURES, SYSPROP_MONSTER, SYSPROP_NIGHTLY, SYSPROP_SLOW, SYSPROP_WEEKLY, TEST_ASSERTS_ENABLED, TEST_AWAITSFIX, TEST_BADAPPLES, TEST_CODEC, TEST_DIRECTORY, TEST_DOCVALUESFORMAT, TEST_LINE_DOCS_FILE, TEST_MONSTER, TEST_NIGHTLY, TEST_POSTINGSFORMAT, TEST_SLOW, TEST_THROTTLING, TEST_WEEKLY, VERBOSE`

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `BaseTokenStreamTestCase()`

  - ### Method Summary

    All Methods Static Methods Instance Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `static void` | `assertAnalyzesTo(Analyzer a, String input, String[] output)`
    `static void` | `assertAnalyzesTo(Analyzer a, String input, String[] output, int[] posIncrements)`
    `static void` | `assertAnalyzesTo(Analyzer a, String input, String[] output, int[] startOffsets, int[] endOffsets)`
    `static void` | `assertAnalyzesTo(Analyzer a, String input, String[] output, int[] startOffsets, int[] endOffsets, int[] posIncrements)`
    `static void` | `assertAnalyzesTo(Analyzer a, String input, String[] output, int[] startOffsets, int[] endOffsets, String[] types, int[] posIncrements)`
    `static void` | `assertAnalyzesTo(Analyzer a, String input, String[] output, int[] startOffsets, int[] endOffsets, String[] types, int[] posIncrements, int[] posLengths)`
    `static void` | `assertAnalyzesTo(Analyzer a, String input, String[] output, int[] startOffsets, int[] endOffsets, String[] types, int[] posIncrements, int[] posLengths, boolean graphOffsetsAreCorrect)`
    `static void` | `assertAnalyzesTo(Analyzer a, String input, String[] output, int[] startOffsets, int[] endOffsets, String[] types, int[] posIncrements, int[] posLengths, boolean graphOffsetsAreCorrect, byte[][] payloads)`
    `static void` | `assertAnalyzesTo(Analyzer a, String input, String[] output, String[] types)`
    `static void` | `assertAnalyzesToPositions(Analyzer a, String input, String[] output, int[] posIncrements, int[] posLengths)`
    `static void` | `assertAnalyzesToPositions(Analyzer a, String input, String[] output, String[] types, int[] posIncrements, int[] posLengths)`
    `static void` | `assertGraphStrings(Analyzer analyzer, String text, String... expectedStrings)` Enumerates all accepted strings in the token graph created by the analyzer on the provided text, and then asserts that it's equal to the expected strings.
    `static void` | `assertGraphStrings(TokenStream tokenStream, String... expectedStrings)` Enumerates all accepted strings in the token graph created by the already initialized `TokenStream`.
    `static void` | `assertStreamHasNumberOfTokens(TokenStream ts, int expectedCount)` Asserts that the given stream has expected number of tokens.
    `static void` | `assertTokenStreamContents(TokenStream ts, String[] output)`
    `static void` | `assertTokenStreamContents(TokenStream ts, String[] output, int[] posIncrements)`
    `static void` | `assertTokenStreamContents(TokenStream ts, String[] output, int[] startOffsets, int[] endOffsets)`
    `static void` | `assertTokenStreamContents(TokenStream ts, String[] output, int[] startOffsets, int[] endOffsets, int[] posIncrements)`
    `static void` | `assertTokenStreamContents(TokenStream ts, String[] output, int[] startOffsets, int[] endOffsets, int[] posIncrements, int[] posLengths, Integer finalOffset)`
    `static void` | `assertTokenStreamContents(TokenStream ts, String[] output, int[] startOffsets, int[] endOffsets, int[] posIncrements, Integer finalOffset)`
    `static void` | `assertTokenStreamContents(TokenStream ts, String[] output, int[] startOffsets, int[] endOffsets, Integer finalOffset)`
    `static void` | `assertTokenStreamContents(TokenStream ts, String[] output, int[] startOffsets, int[] endOffsets, String[] types, int[] posIncrements)`
    `static void` | `assertTokenStreamContents(TokenStream ts, String[] output, int[] startOffsets, int[] endOffsets, String[] types, int[] posIncrements, int[] posLengths)`
    `static void` | `assertTokenStreamContents(TokenStream ts, String[] output, int[] startOffsets, int[] endOffsets, String[] types, int[] posIncrements, int[] posLengths, Integer finalOffset)`
    `static void` | `assertTokenStreamContents(TokenStream ts, String[] output, int[] startOffsets, int[] endOffsets, String[] types, int[] posIncrements, int[] posLengths, Integer finalOffset, boolean graphOffsetsAreCorrect)`
    `static void` | `assertTokenStreamContents(TokenStream ts, String[] output, int[] startOffsets, int[] endOffsets, String[] types, int[] posIncrements, int[] posLengths, Integer finalOffset, boolean[] keywordAtts, boolean graphOffsetsAreCorrect)`
    `static void` | `assertTokenStreamContents(TokenStream ts, String[] output, int[] startOffsets, int[] endOffsets, String[] types, int[] posIncrements, int[] posLengths, Integer finalOffset, Integer finalPosInc, boolean[] keywordAtts, boolean graphOffsetsAreCorrect, byte[][] payloads)`
    `static void` | `assertTokenStreamContents(TokenStream ts, String[] output, int[] startOffsets, int[] endOffsets, String[] types, int[] posIncrements, Integer finalOffset)`
    `static void` | `assertTokenStreamContents(TokenStream ts, String[] output, String[] types)`
    `static void` | `checkAnalysisConsistency(Random random, Analyzer a, boolean useCharFilter, String text)`
    `static void` | `checkAnalysisConsistency(Random random, Analyzer a, boolean useCharFilter, String text, boolean graphOffsetsAreCorrect)`
    `static void` | `checkOneTerm(Analyzer a, String input, String expected)`
    `static void` | `checkRandomData(Random random, Analyzer a, int iterations)` utility method for blasting tokenstreams with data to make sure they don't do anything crazy
    `static void` | `checkRandomData(Random random, Analyzer a, int iterations, boolean simple)` utility method for blasting tokenstreams with data to make sure they don't do anything crazy
    `static void` | `checkRandomData(Random random, Analyzer a, int iterations, int maxWordLength)` utility method for blasting tokenstreams with data to make sure they don't do anything crazy
    `static void` | `checkRandomData(Random random, Analyzer a, int iterations, int maxWordLength, boolean simple)`
    `static void` | `checkRandomData(Random random, Analyzer a, int iterations, int maxWordLength, boolean simple, boolean graphOffsetsAreCorrect)`
    `static String` | `escape(String s)`
    `static Set<String>` | `getGraphStrings(Analyzer analyzer, String text)` Returns all paths accepted by the token stream graph produced by analyzing text with the provided analyzer.
    `static Set<String>` | `getGraphStrings(TokenStream tokenStream)` Returns all paths accepted by the token stream graph produced by the already initialized `TokenStream`.
    `protected static MockTokenizer` | `keywordMockTokenizer(Reader input)`
    `protected static MockTokenizer` | `keywordMockTokenizer(String input)`
    `static AttributeFactory` | `newAttributeFactory()` Returns a random AttributeFactory impl
    `static AttributeFactory` | `newAttributeFactory(Random random)` Returns a random AttributeFactory impl
    `protected String` | `toDot(Analyzer a, String inputText)`
    `protected void` | `toDotFile(Analyzer a, String inputText, String localFileName)`
    `static String` | `toString(Analyzer analyzer, String text)` Returns a `String` summary of the tokens this analyzer produces on this text
    `protected static MockTokenizer` | `whitespaceMockTokenizer(Reader input)`
    `protected static MockTokenizer` | `whitespaceMockTokenizer(String input)`

    - ### Methods inherited from class org.apache.lucene.util.LuceneTestCase

      `addVirusChecker, assertDeletedDocsEquals, assertDocsAndPositionsEnumEquals, assertDocsEnumEquals, assertDocsSkippingEquals, assertDocValuesEquals, assertDocValuesEquals, assertFieldInfosEquals, assertNormsEquals, assertPointsEquals, assertPositionsSkippingEquals, assertReaderEquals, assertReaderStatisticsEquals, assertStoredFieldEquals, assertStoredFieldsEquals, assertTermsEnumEquals, assertTermsEquals, assertTermsEquals, assertTermsStatisticsEquals, assertTermStatsEquals, assertTermVectorsEquals, asSet, assumeFalse, assumeNoException, assumeTrue, assumeWorkingMMapOnWindows, atLeast, atLeast, closeAfterSuite, closeAfterTest, collate, createTempDir, createTempDir, createTempFile, createTempFile, dumpArray, dumpIterator, expectThrows, expectThrows, expectThrows, expectThrowsAnyOf, expectThrowsAnyOf, getBaseTempDirForTestClass, getDataInputStream, getDataPath, getOnlyLeafReader, getTestClass, getTestName, hasWorkingMMapOnWindows, isTestThread, localeForLanguageTag, maybeChangeLiveIndexWriterConfig, maybeWrapReader, newAlcoholicMergePolicy, newAlcoholicMergePolicy, newDirectory, newDirectory, newDirectory, newDirectory, newDirectory, newField, newField, newFSDirectory, newFSDirectory, newIndexWriterConfig, newIndexWriterConfig, newIndexWriterConfig, newIOContext, newIOContext, newLogMergePolicy, newLogMergePolicy, newLogMergePolicy, newLogMergePolicy, newLogMergePolicy, newMaybeVirusCheckingDirectory, newMaybeVirusCheckingFSDirectory, newMergePolicy, newMergePolicy, newMergePolicy, newMockDirectory, newMockDirectory, newMockDirectory, newMockFSDirectory, newMockFSDirectory, newSearcher, newSearcher, newSearcher, newStringField, newStringField, newStringField, newStringField, newTextField, newTextField, newTieredMergePolicy, newTieredMergePolicy, overrideDefaultQueryCache, overrideTestDefaultQueryCache, random, randomLocale, randomTimeZone, rarely, rarely, replaceMaxFailureRule, resetDefaultQueryCache, restoreCPUCoreCount, restoreIndexWriterMaxDocs, restoreSpins, runWithRestrictedPermissions, setIndexWriterMaxDocs, setUp, setupCPUCoreCount, setupSpins, slowFileExists, tearDown, usually, usually, wrapReader`

    - ### Methods inherited from class org.junit.Assert

      `assertArrayEquals, assertArrayEquals, assertArrayEquals, assertArrayEquals, assertArrayEquals, assertArrayEquals, assertArrayEquals, assertArrayEquals, assertArrayEquals, assertArrayEquals, assertArrayEquals, assertArrayEquals, assertArrayEquals, assertArrayEquals, assertArrayEquals, assertArrayEquals, assertArrayEquals, assertArrayEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertFalse, assertFalse, assertNotEquals, assertNotEquals, assertNotEquals, assertNotEquals, assertNotEquals, assertNotEquals, assertNotEquals, assertNotEquals, assertNotNull, assertNotNull, assertNotSame, assertNotSame, assertNull, assertNull, assertSame, assertSame, assertThat, assertThat, assertTrue, assertTrue, fail, fail`

    - ### Methods inherited from class java.lang.Object

      `clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

- - ### Constructor Detail

    - #### BaseTokenStreamTestCase

          public BaseTokenStreamTestCase()

  - ### Method Detail

    - #### assertTokenStreamContents

          public static void assertTokenStreamContents(TokenStream ts,
                                                       String[] output,
                                                       int[] startOffsets,
                                                       int[] endOffsets,
                                                       String[] types,
                                                       int[] posIncrements,
                                                       int[] posLengths,
                                                       Integer finalOffset,
                                                       Integer finalPosInc,
                                                       boolean[] keywordAtts,
                                                       boolean graphOffsetsAreCorrect,
                                                       byte[][] payloads)
                                                throws IOException

      Throws:
        `IOException`

    - #### assertTokenStreamContents

          public static void assertTokenStreamContents(TokenStream ts,
                                                       String[] output,
                                                       int[] startOffsets,
                                                       int[] endOffsets,
                                                       String[] types,
                                                       int[] posIncrements,
                                                       int[] posLengths,
                                                       Integer finalOffset,
                                                       boolean[] keywordAtts,
                                                       boolean graphOffsetsAreCorrect)
                                                throws IOException

      Throws:
        `IOException`

    - #### assertTokenStreamContents

          public static void assertTokenStreamContents(TokenStream ts,
                                                       String[] output,
                                                       int[] startOffsets,
                                                       int[] endOffsets,
                                                       String[] types,
                                                       int[] posIncrements,
                                                       int[] posLengths,
                                                       Integer finalOffset,
                                                       boolean graphOffsetsAreCorrect)
                                                throws IOException

      Throws:
        `IOException`

    - #### assertTokenStreamContents

          public static void assertTokenStreamContents(TokenStream ts,
                                                       String[] output,
                                                       int[] startOffsets,
                                                       int[] endOffsets,
                                                       String[] types,
                                                       int[] posIncrements,
                                                       int[] posLengths,
                                                       Integer finalOffset)
                                                throws IOException

      Throws:
        `IOException`

    - #### assertTokenStreamContents

          public static void assertTokenStreamContents(TokenStream ts,
                                                       String[] output,
                                                       int[] startOffsets,
                                                       int[] endOffsets,
                                                       String[] types,
                                                       int[] posIncrements,
                                                       Integer finalOffset)
                                                throws IOException

      Throws:
        `IOException`

    - #### assertTokenStreamContents

          public static void assertTokenStreamContents(TokenStream ts,
                                                       String[] output,
                                                       int[] startOffsets,
                                                       int[] endOffsets,
                                                       String[] types,
                                                       int[] posIncrements)
                                                throws IOException

      Throws:
        `IOException`

    - #### assertTokenStreamContents

          public static void assertTokenStreamContents(TokenStream ts,
                                                       String[] output,
                                                       int[] startOffsets,
                                                       int[] endOffsets,
                                                       String[] types,
                                                       int[] posIncrements,
                                                       int[] posLengths)
                                                throws IOException

      Throws:
        `IOException`

    - #### assertTokenStreamContents

          public static void assertTokenStreamContents(TokenStream ts,
                                                       String[] output)
                                                throws IOException

      Throws:
        `IOException`

    - #### assertTokenStreamContents

          public static void assertTokenStreamContents(TokenStream ts,
                                                       String[] output,
                                                       String[] types)
                                                throws IOException

      Throws:
        `IOException`

    - #### assertTokenStreamContents

          public static void assertTokenStreamContents(TokenStream ts,
                                                       String[] output,
                                                       int[] posIncrements)
                                                throws IOException

      Throws:
        `IOException`

    - #### assertTokenStreamContents

          public static void assertTokenStreamContents(TokenStream ts,
                                                       String[] output,
                                                       int[] startOffsets,
                                                       int[] endOffsets)
                                                throws IOException

      Throws:
        `IOException`

    - #### assertTokenStreamContents

          public static void assertTokenStreamContents(TokenStream ts,
                                                       String[] output,
                                                       int[] startOffsets,
                                                       int[] endOffsets,
                                                       Integer finalOffset)
                                                throws IOException

      Throws:
        `IOException`

    - #### assertTokenStreamContents

          public static void assertTokenStreamContents(TokenStream ts,
                                                       String[] output,
                                                       int[] startOffsets,
                                                       int[] endOffsets,
                                                       int[] posIncrements)
                                                throws IOException

      Throws:
        `IOException`

    - #### assertTokenStreamContents

          public static void assertTokenStreamContents(TokenStream ts,
                                                       String[] output,
                                                       int[] startOffsets,
                                                       int[] endOffsets,
                                                       int[] posIncrements,
                                                       Integer finalOffset)
                                                throws IOException

      Throws:
        `IOException`

    - #### assertTokenStreamContents

          public static void assertTokenStreamContents(TokenStream ts,
                                                       String[] output,
                                                       int[] startOffsets,
                                                       int[] endOffsets,
                                                       int[] posIncrements,
                                                       int[] posLengths,
                                                       Integer finalOffset)
                                                throws IOException

      Throws:
        `IOException`

    - #### assertAnalyzesTo

          public static void assertAnalyzesTo(Analyzer a,
                                              String input,
                                              String[] output,
                                              int[] startOffsets,
                                              int[] endOffsets,
                                              String[] types,
                                              int[] posIncrements)
                                       throws IOException

      Throws:
        `IOException`

    - #### assertAnalyzesTo

          public static void assertAnalyzesTo(Analyzer a,
                                              String input,
                                              String[] output,
                                              int[] startOffsets,
                                              int[] endOffsets,
                                              String[] types,
                                              int[] posIncrements,
                                              int[] posLengths)
                                       throws IOException

      Throws:
        `IOException`

    - #### assertAnalyzesTo

          public static void assertAnalyzesTo(Analyzer a,
                                              String input,
                                              String[] output,
                                              int[] startOffsets,
                                              int[] endOffsets,
                                              String[] types,
                                              int[] posIncrements,
                                              int[] posLengths,
                                              boolean graphOffsetsAreCorrect)
                                       throws IOException

      Throws:
        `IOException`

    - #### assertAnalyzesTo

          public static void assertAnalyzesTo(Analyzer a,
                                              String input,
                                              String[] output,
                                              int[] startOffsets,
                                              int[] endOffsets,
                                              String[] types,
                                              int[] posIncrements,
                                              int[] posLengths,
                                              boolean graphOffsetsAreCorrect,
                                              byte[][] payloads)
                                       throws IOException

      Throws:
        `IOException`

    - #### assertAnalyzesTo

          public static void assertAnalyzesTo(Analyzer a,
                                              String input,
                                              String[] output)
                                       throws IOException

      Throws:
        `IOException`

    - #### assertAnalyzesTo

          public static void assertAnalyzesTo(Analyzer a,
                                              String input,
                                              String[] output,
                                              String[] types)
                                       throws IOException

      Throws:
        `IOException`

    - #### assertAnalyzesTo

          public static void assertAnalyzesTo(Analyzer a,
                                              String input,
                                              String[] output,
                                              int[] posIncrements)
                                       throws IOException

      Throws:
        `IOException`

    - #### assertAnalyzesToPositions

          public static void assertAnalyzesToPositions(Analyzer a,
                                                       String input,
                                                       String[] output,
                                                       int[] posIncrements,
                                                       int[] posLengths)
                                                throws IOException

      Throws:
        `IOException`

    - #### assertAnalyzesToPositions

          public static void assertAnalyzesToPositions(Analyzer a,
                                                       String input,
                                                       String[] output,
                                                       String[] types,
                                                       int[] posIncrements,
                                                       int[] posLengths)
                                                throws IOException

      Throws:
        `IOException`

    - #### assertAnalyzesTo

          public static void assertAnalyzesTo(Analyzer a,
                                              String input,
                                              String[] output,
                                              int[] startOffsets,
                                              int[] endOffsets)
                                       throws IOException

      Throws:
        `IOException`

    - #### assertAnalyzesTo

          public static void assertAnalyzesTo(Analyzer a,
                                              String input,
                                              String[] output,
                                              int[] startOffsets,
                                              int[] endOffsets,
                                              int[] posIncrements)
                                       throws IOException

      Throws:
        `IOException`

    - #### checkOneTerm

          public static void checkOneTerm(Analyzer a,
                                          String input,
                                          String expected)
                                   throws IOException

      Throws:
        `IOException`

    - #### checkRandomData

          public static void checkRandomData(Random random,
                                             Analyzer a,
                                             int iterations)
                                      throws IOException

      utility method for blasting tokenstreams with data to make sure they don't do anything crazy
      Throws:
        `IOException`

    - #### checkRandomData

          public static void checkRandomData(Random random,
                                             Analyzer a,
                                             int iterations,
                                             int maxWordLength)
                                      throws IOException

      utility method for blasting tokenstreams with data to make sure they don't do anything crazy
      Throws:
        `IOException`

    - #### checkRandomData

          public static void checkRandomData(Random random,
                                             Analyzer a,
                                             int iterations,
                                             boolean simple)
                                      throws IOException

      utility method for blasting tokenstreams with data to make sure they don't do anything crazy
      Parameters:
        `simple` - true if only ascii strings will be used (try to avoid)
      Throws:
        `IOException`

    - #### assertStreamHasNumberOfTokens

          public static void assertStreamHasNumberOfTokens(TokenStream ts,
                                                           int expectedCount)
                                                    throws IOException

      Asserts that the given stream has expected number of tokens.
      Throws:
        `IOException`

    - #### checkRandomData

          public static void checkRandomData(Random random,
                                             Analyzer a,
                                             int iterations,
                                             int maxWordLength,
                                             boolean simple)
                                      throws IOException

      Throws:
        `IOException`

    - #### checkRandomData

          public static void checkRandomData(Random random,
                                             Analyzer a,
                                             int iterations,
                                             int maxWordLength,
                                             boolean simple,
                                             boolean graphOffsetsAreCorrect)
                                      throws IOException

      Throws:
        `IOException`

    - #### escape

          public static String escape(String s)

    - #### checkAnalysisConsistency

          public static void checkAnalysisConsistency(Random random,
                                                      Analyzer a,
                                                      boolean useCharFilter,
                                                      String text)
                                               throws IOException

      Throws:
        `IOException`

    - #### checkAnalysisConsistency

          public static void checkAnalysisConsistency(Random random,
                                                      Analyzer a,
                                                      boolean useCharFilter,
                                                      String text,
                                                      boolean graphOffsetsAreCorrect)
                                               throws IOException

      Throws:
        `IOException`

    - #### toDot

          protected String toDot(Analyzer a,
                                 String inputText)
                          throws IOException

      Throws:
        `IOException`

    - #### toDotFile

          protected void toDotFile(Analyzer a,
                                   String inputText,
                                   String localFileName)
                            throws IOException

      Throws:
        `IOException`

    - #### whitespaceMockTokenizer

          protected static MockTokenizer whitespaceMockTokenizer(Reader input)
                                                          throws IOException

      Throws:
        `IOException`

    - #### whitespaceMockTokenizer

          protected static MockTokenizer whitespaceMockTokenizer(String input)
                                                          throws IOException

      Throws:
        `IOException`

    - #### keywordMockTokenizer

          protected static MockTokenizer keywordMockTokenizer(Reader input)
                                                       throws IOException

      Throws:
        `IOException`

    - #### keywordMockTokenizer

          protected static MockTokenizer keywordMockTokenizer(String input)
                                                       throws IOException

      Throws:
        `IOException`

    - #### newAttributeFactory

          public static AttributeFactory newAttributeFactory(Random random)

      Returns a random AttributeFactory impl

    - #### newAttributeFactory

          public static AttributeFactory newAttributeFactory()

      Returns a random AttributeFactory impl

    - #### assertGraphStrings

          public static void assertGraphStrings(Analyzer analyzer,
                                                String text,
                                                String... expectedStrings)
                                         throws IOException

      Enumerates all accepted strings in the token graph created by the analyzer on the provided text, and then asserts that it's equal to the expected strings. Uses `TokenStreamToAutomaton` to create an automaton. Asserts the finite strings of the automaton are all and only the given valid strings.
      Parameters:
        `analyzer` - analyzer containing the SynonymFilter under test.
        `text` - text to be analyzed.
        `expectedStrings` - all expected finite strings.
      Throws:
        `IOException`

    - #### assertGraphStrings

          public static void assertGraphStrings(TokenStream tokenStream,
                                                String... expectedStrings)
                                         throws IOException

      Enumerates all accepted strings in the token graph created by the already initialized `TokenStream`.
      Throws:
        `IOException`

    - #### getGraphStrings

          public static Set<String> getGraphStrings(Analyzer analyzer,
                                                    String text)
                                             throws IOException

      Returns all paths accepted by the token stream graph produced by analyzing text with the provided analyzer. The tokens `CharTermAttribute` values are concatenated, and separated with space.
      Throws:
        `IOException`

    - #### getGraphStrings

          public static Set<String> getGraphStrings(TokenStream tokenStream)
                                             throws IOException

      Returns all paths accepted by the token stream graph produced by the already initialized `TokenStream`.
      Throws:
        `IOException`

    - #### toString

          public static String toString(Analyzer analyzer,
                                        String text)
                                 throws IOException

      Returns a `String` summary of the tokens this analyzer produces on this text
      Throws:
        `IOException`

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