lucene/analysis/common/src/test/org/apache/lucene/analysis/cjk/TestCJKAnalyzer.java - lucene-solr - Git at Google

 /*
  * 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.cjk;

 import java.io.IOException;
 import java.io.Reader;
 import org.apache.lucene.analysis.Analyzer;
 import org.apache.lucene.analysis.BaseTokenStreamTestCase;
 import org.apache.lucene.analysis.CharArraySet;
 import org.apache.lucene.analysis.MockTokenizer;
 import org.apache.lucene.analysis.StopFilter;
 import org.apache.lucene.analysis.TokenFilter;
 import org.apache.lucene.analysis.TokenStream;
 import org.apache.lucene.analysis.Tokenizer;
 import org.apache.lucene.analysis.charfilter.MappingCharFilter;
 import org.apache.lucene.analysis.charfilter.NormalizeCharMap;
 import org.apache.lucene.analysis.core.KeywordTokenizer;
 import org.apache.lucene.analysis.standard.StandardTokenizer;
 import org.apache.lucene.analysis.tokenattributes.TypeAttribute;

 /** Most tests adopted from TestCJKTokenizer */
 public class TestCJKAnalyzer extends BaseTokenStreamTestCase {
   private Analyzer analyzer;

   @Override
   public void setUp() throws Exception {
     super.setUp();
     analyzer = new CJKAnalyzer();
   }

   @Override
   public void tearDown() throws Exception {
     analyzer.close();
     super.tearDown();
   }

   public void testJa1() throws IOException {
     assertAnalyzesTo(
         analyzer,
         "一二三四五六七八九十",
         new String[] {"一二", "二三", "三四", "四五", "五六", "六七", "七八", "八九", "九十"},
         new int[] {0, 1, 2, 3, 4, 5, 6, 7, 8},
         new int[] {2, 3, 4, 5, 6, 7, 8, 9, 10},
         new String[] {
           "<DOUBLE>",
           "<DOUBLE>",
           "<DOUBLE>",
           "<DOUBLE>",
           "<DOUBLE>",
           "<DOUBLE>",
           "<DOUBLE>",
           "<DOUBLE>",
           "<DOUBLE>"
         },
         new int[] {1, 1, 1, 1, 1, 1, 1, 1, 1});
   }

   public void testJa2() throws IOException {
     assertAnalyzesTo(
         analyzer,
         "一 二三四 五六七八九 十",
         new String[] {"一", "二三", "三四", "五六", "六七", "七八", "八九", "十"},
         new int[] {0, 2, 3, 6, 7, 8, 9, 12},
         new int[] {1, 4, 5, 8, 9, 10, 11, 13},
         new String[] {
           "<SINGLE>",
           "<DOUBLE>",
           "<DOUBLE>",
           "<DOUBLE>",
           "<DOUBLE>",
           "<DOUBLE>",
           "<DOUBLE>",
           "<SINGLE>"
         },
         new int[] {1, 1, 1, 1, 1, 1, 1, 1});
   }

   public void testC() throws IOException {
     assertAnalyzesTo(
         analyzer,
         "abc defgh ijklmn opqrstu vwxy z",
         new String[] {"abc", "defgh", "ijklmn", "opqrstu", "vwxy", "z"},
         new int[] {0, 4, 10, 17, 25, 30},
         new int[] {3, 9, 16, 24, 29, 31},
         new String[] {
           "<ALPHANUM>", "<ALPHANUM>", "<ALPHANUM>", "<ALPHANUM>", "<ALPHANUM>", "<ALPHANUM>"
         },
         new int[] {1, 1, 1, 1, 1, 1});
   }

   /** LUCENE-2207: wrong offset calculated by end() */
   public void testFinalOffset() throws IOException {
     assertAnalyzesTo(
         analyzer,
         "あい",
         new String[] {"あい"},
         new int[] {0},
         new int[] {2},
         new String[] {"<DOUBLE>"},
         new int[] {1});

     assertAnalyzesTo(
         analyzer,
         "あい   ",
         new String[] {"あい"},
         new int[] {0},
         new int[] {2},
         new String[] {"<DOUBLE>"},
         new int[] {1});

     assertAnalyzesTo(
         analyzer,
         "test",
         new String[] {"test"},
         new int[] {0},
         new int[] {4},
         new String[] {"<ALPHANUM>"},
         new int[] {1});

     assertAnalyzesTo(
         analyzer,
         "test   ",
         new String[] {"test"},
         new int[] {0},
         new int[] {4},
         new String[] {"<ALPHANUM>"},
         new int[] {1});

     assertAnalyzesTo(
         analyzer,
         "あいtest",
         new String[] {"あい", "test"},
         new int[] {0, 2},
         new int[] {2, 6},
         new String[] {"<DOUBLE>", "<ALPHANUM>"},
         new int[] {1, 1});

     assertAnalyzesTo(
         analyzer,
         "testあい    ",
         new String[] {"test", "あい"},
         new int[] {0, 4},
         new int[] {4, 6},
         new String[] {"<ALPHANUM>", "<DOUBLE>"},
         new int[] {1, 1});
   }

   public void testMix() throws IOException {
     assertAnalyzesTo(
         analyzer,
         "あいうえおabcかきくけこ",
         new String[] {"あい", "いう", "うえ", "えお", "abc", "かき", "きく", "くけ", "けこ"},
         new int[] {0, 1, 2, 3, 5, 8, 9, 10, 11},
         new int[] {2, 3, 4, 5, 8, 10, 11, 12, 13},
         new String[] {
           "<DOUBLE>",
           "<DOUBLE>",
           "<DOUBLE>",
           "<DOUBLE>",
           "<ALPHANUM>",
           "<DOUBLE>",
           "<DOUBLE>",
           "<DOUBLE>",
           "<DOUBLE>"
         },
         new int[] {1, 1, 1, 1, 1, 1, 1, 1, 1});
   }

   public void testMix2() throws IOException {
     assertAnalyzesTo(
         analyzer,
         "あいうえおabんcかきくけ こ",
         new String[] {"あい", "いう", "うえ", "えお", "ab", "ん", "c", "かき", "きく", "くけ", "こ"},
         new int[] {0, 1, 2, 3, 5, 7, 8, 9, 10, 11, 14},
         new int[] {2, 3, 4, 5, 7, 8, 9, 11, 12, 13, 15},
         new String[] {
           "<DOUBLE>",
           "<DOUBLE>",
           "<DOUBLE>",
           "<DOUBLE>",
           "<ALPHANUM>",
           "<SINGLE>",
           "<ALPHANUM>",
           "<DOUBLE>",
           "<DOUBLE>",
           "<DOUBLE>",
           "<SINGLE>"
         },
         new int[] {1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1});
   }

   /** Non-english text (outside of CJK) is treated normally, according to unicode rules */
   public void testNonIdeographic() throws IOException {
     assertAnalyzesTo(
         analyzer,
         "一 روبرت موير",
         new String[] {"一", "روبرت", "موير"},
         new int[] {0, 2, 8},
         new int[] {1, 7, 12},
         new String[] {"<SINGLE>", "<ALPHANUM>", "<ALPHANUM>"},
         new int[] {1, 1, 1});
   }

   /** Same as the above, except with a nonspacing mark to show correctness. */
   public void testNonIdeographicNonLetter() throws IOException {
     assertAnalyzesTo(
         analyzer,
         "一 رُوبرت موير",
         new String[] {"一", "رُوبرت", "موير"},
         new int[] {0, 2, 9},
         new int[] {1, 8, 13},
         new String[] {"<SINGLE>", "<ALPHANUM>", "<ALPHANUM>"},
         new int[] {1, 1, 1});
   }

   public void testSurrogates() throws IOException {
     assertAnalyzesTo(
         analyzer,
         "𩬅艱鍟䇹愯瀛",
         new String[] {"𩬅艱", "艱鍟", "鍟䇹", "䇹愯", "愯瀛"},
         new int[] {0, 2, 3, 4, 5},
         new int[] {3, 4, 5, 6, 7},
         new String[] {"<DOUBLE>", "<DOUBLE>", "<DOUBLE>", "<DOUBLE>", "<DOUBLE>"},
         new int[] {1, 1, 1, 1, 1});
   }

   public void testReusableTokenStream() throws IOException {
     assertAnalyzesTo(
         analyzer,
         "あいうえおabcかきくけこ",
         new String[] {"あい", "いう", "うえ", "えお", "abc", "かき", "きく", "くけ", "けこ"},
         new int[] {0, 1, 2, 3, 5, 8, 9, 10, 11},
         new int[] {2, 3, 4, 5, 8, 10, 11, 12, 13},
         new String[] {
           "<DOUBLE>",
           "<DOUBLE>",
           "<DOUBLE>",
           "<DOUBLE>",
           "<ALPHANUM>",
           "<DOUBLE>",
           "<DOUBLE>",
           "<DOUBLE>",
           "<DOUBLE>"
         },
         new int[] {1, 1, 1, 1, 1, 1, 1, 1, 1});

     assertAnalyzesTo(
         analyzer,
         "あいうえおabんcかきくけ こ",
         new String[] {"あい", "いう", "うえ", "えお", "ab", "ん", "c", "かき", "きく", "くけ", "こ"},
         new int[] {0, 1, 2, 3, 5, 7, 8, 9, 10, 11, 14},
         new int[] {2, 3, 4, 5, 7, 8, 9, 11, 12, 13, 15},
         new String[] {
           "<DOUBLE>",
           "<DOUBLE>",
           "<DOUBLE>",
           "<DOUBLE>",
           "<ALPHANUM>",
           "<SINGLE>",
           "<ALPHANUM>",
           "<DOUBLE>",
           "<DOUBLE>",
           "<DOUBLE>",
           "<SINGLE>"
         },
         new int[] {1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1});
   }

   public void testSingleChar() throws IOException {
     assertAnalyzesTo(
         analyzer,
         "一",
         new String[] {"一"},
         new int[] {0},
         new int[] {1},
         new String[] {"<SINGLE>"},
         new int[] {1});
   }

   public void testTokenStream() throws IOException {
     assertAnalyzesTo(
         analyzer,
         "一丁丂",
         new String[] {"一丁", "丁丂"},
         new int[] {0, 1},
         new int[] {2, 3},
         new String[] {"<DOUBLE>", "<DOUBLE>"},
         new int[] {1, 1});
   }

   /** test that offsets are correct when mappingcharfilter is previously applied */
   public void testChangedOffsets() throws IOException {
     final NormalizeCharMap.Builder builder = new NormalizeCharMap.Builder();
     builder.add("a", "一二");
     builder.add("b", "二三");
     final NormalizeCharMap norm = builder.build();
     Analyzer analyzer =
         new Analyzer() {
           @Override
           protected TokenStreamComponents createComponents(String fieldName) {
             Tokenizer tokenizer = new StandardTokenizer();
             return new TokenStreamComponents(tokenizer, new CJKBigramFilter(tokenizer));
           }

           @Override
           protected Reader initReader(String fieldName, Reader reader) {
             return new MappingCharFilter(norm, reader);
           }
         };

     assertAnalyzesTo(
         analyzer, "ab", new String[] {"一二", "二二", "二三"}, new int[] {0, 0, 1}, new int[] {1, 1, 2});

     // note: offsets are strange since this is how the charfilter maps them...
     // before bigramming, the 4 tokens look like:
     //   { 0, 0, 1, 1 },
     //   { 0, 1, 1, 2 }

     analyzer.close();
   }

   private static class FakeStandardTokenizer extends TokenFilter {
     final TypeAttribute typeAtt = addAttribute(TypeAttribute.class);

     public FakeStandardTokenizer(TokenStream input) {
       super(input);
     }

     @Override
     public boolean incrementToken() throws IOException {
       if (input.incrementToken()) {
         typeAtt.setType(StandardTokenizer.TOKEN_TYPES[StandardTokenizer.IDEOGRAPHIC]);
         return true;
       } else {
         return false;
       }
     }
   }

   public void testSingleChar2() throws Exception {
     Analyzer analyzer =
         new Analyzer() {

           @Override
           protected TokenStreamComponents createComponents(String fieldName) {
             Tokenizer tokenizer = new MockTokenizer(MockTokenizer.WHITESPACE, false);
             TokenFilter filter = new FakeStandardTokenizer(tokenizer);
             filter = new StopFilter(filter, CharArraySet.EMPTY_SET);
             filter = new CJKBigramFilter(filter);
             return new TokenStreamComponents(tokenizer, filter);
           }
         };

     assertAnalyzesTo(
         analyzer,
         "一",
         new String[] {"一"},
         new int[] {0},
         new int[] {1},
         new String[] {"<SINGLE>"},
         new int[] {1});
     analyzer.close();
   }

   /** blast some random strings through the analyzer */
   public void testRandomStrings() throws Exception {
     Analyzer a = new CJKAnalyzer();
     checkRandomData(random(), a, 200 * RANDOM_MULTIPLIER);
     a.close();
   }

   /** blast some random strings through the analyzer */
   public void testRandomHugeStrings() throws Exception {
     Analyzer a = new CJKAnalyzer();
     checkRandomData(random(), a, 10 * RANDOM_MULTIPLIER, 8192);
     a.close();
   }

   public void testEmptyTerm() throws IOException {
     Analyzer a =
         new Analyzer() {
           @Override
           protected TokenStreamComponents createComponents(String fieldName) {
             Tokenizer tokenizer = new KeywordTokenizer();
             return new TokenStreamComponents(tokenizer, new CJKBigramFilter(tokenizer));
           }
         };
     checkOneTerm(a, "", "");
     a.close();
   }
 }
	/*
	* 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.cjk;

	import java.io.IOException;
	import java.io.Reader;
	import org.apache.lucene.analysis.Analyzer;
	import org.apache.lucene.analysis.BaseTokenStreamTestCase;
	import org.apache.lucene.analysis.CharArraySet;
	import org.apache.lucene.analysis.MockTokenizer;
	import org.apache.lucene.analysis.StopFilter;
	import org.apache.lucene.analysis.TokenFilter;
	import org.apache.lucene.analysis.TokenStream;
	import org.apache.lucene.analysis.Tokenizer;
	import org.apache.lucene.analysis.charfilter.MappingCharFilter;
	import org.apache.lucene.analysis.charfilter.NormalizeCharMap;
	import org.apache.lucene.analysis.core.KeywordTokenizer;
	import org.apache.lucene.analysis.standard.StandardTokenizer;
	import org.apache.lucene.analysis.tokenattributes.TypeAttribute;

	/** Most tests adopted from TestCJKTokenizer */
	public class TestCJKAnalyzer extends BaseTokenStreamTestCase {
	private Analyzer analyzer;

	@Override
	public void setUp() throws Exception {
	super.setUp();
	analyzer = new CJKAnalyzer();
	}

	@Override
	public void tearDown() throws Exception {
	analyzer.close();
	super.tearDown();
	}

	public void testJa1() throws IOException {
	assertAnalyzesTo(
	analyzer,
	"一二三四五六七八九十",
	new String[] {"一二", "二三", "三四", "四五", "五六", "六七", "七八", "八九", "九十"},
	new int[] {0, 1, 2, 3, 4, 5, 6, 7, 8},
	new int[] {2, 3, 4, 5, 6, 7, 8, 9, 10},
	new String[] {
	"<DOUBLE>",
	"<DOUBLE>",
	"<DOUBLE>",
	"<DOUBLE>",
	"<DOUBLE>",
	"<DOUBLE>",
	"<DOUBLE>",
	"<DOUBLE>",
	"<DOUBLE>"
	},
	new int[] {1, 1, 1, 1, 1, 1, 1, 1, 1});
	}

	public void testJa2() throws IOException {
	assertAnalyzesTo(
	analyzer,
	"一二三四五六七八九十",
	new String[] {"一", "二三", "三四", "五六", "六七", "七八", "八九", "十"},
	new int[] {0, 2, 3, 6, 7, 8, 9, 12},
	new int[] {1, 4, 5, 8, 9, 10, 11, 13},
	new String[] {
	"<SINGLE>",
	"<DOUBLE>",
	"<DOUBLE>",
	"<DOUBLE>",
	"<DOUBLE>",
	"<DOUBLE>",
	"<DOUBLE>",
	"<SINGLE>"
	},
	new int[] {1, 1, 1, 1, 1, 1, 1, 1});
	}

	public void testC() throws IOException {
	assertAnalyzesTo(
	analyzer,
	"abc defgh ijklmn opqrstu vwxy z",
	new String[] {"abc", "defgh", "ijklmn", "opqrstu", "vwxy", "z"},
	new int[] {0, 4, 10, 17, 25, 30},
	new int[] {3, 9, 16, 24, 29, 31},
	new String[] {
	"<ALPHANUM>", "<ALPHANUM>", "<ALPHANUM>", "<ALPHANUM>", "<ALPHANUM>", "<ALPHANUM>"
	},
	new int[] {1, 1, 1, 1, 1, 1});
	}

	/** LUCENE-2207: wrong offset calculated by end() */
	public void testFinalOffset() throws IOException {
	assertAnalyzesTo(
	analyzer,
	"あい",
	new String[] {"あい"},
	new int[] {0},
	new int[] {2},
	new String[] {"<DOUBLE>"},
	new int[] {1});

	assertAnalyzesTo(
	analyzer,
	"あい ",
	new String[] {"あい"},
	new int[] {0},
	new int[] {2},
	new String[] {"<DOUBLE>"},
	new int[] {1});

	assertAnalyzesTo(
	analyzer,
	"test",
	new String[] {"test"},
	new int[] {0},
	new int[] {4},
	new String[] {"<ALPHANUM>"},
	new int[] {1});

	assertAnalyzesTo(
	analyzer,
	"test ",
	new String[] {"test"},
	new int[] {0},
	new int[] {4},
	new String[] {"<ALPHANUM>"},
	new int[] {1});

	assertAnalyzesTo(
	analyzer,
	"あいtest",
	new String[] {"あい", "test"},
	new int[] {0, 2},
	new int[] {2, 6},
	new String[] {"<DOUBLE>", "<ALPHANUM>"},
	new int[] {1, 1});

	assertAnalyzesTo(
	analyzer,
	"testあい ",
	new String[] {"test", "あい"},
	new int[] {0, 4},
	new int[] {4, 6},
	new String[] {"<ALPHANUM>", "<DOUBLE>"},
	new int[] {1, 1});
	}

	public void testMix() throws IOException {
	assertAnalyzesTo(
	analyzer,
	"あいうえおabcかきくけこ",
	new String[] {"あい", "いう", "うえ", "えお", "abc", "かき", "きく", "くけ", "けこ"},
	new int[] {0, 1, 2, 3, 5, 8, 9, 10, 11},
	new int[] {2, 3, 4, 5, 8, 10, 11, 12, 13},
	new String[] {
	"<DOUBLE>",
	"<DOUBLE>",
	"<DOUBLE>",
	"<DOUBLE>",
	"<ALPHANUM>",
	"<DOUBLE>",
	"<DOUBLE>",
	"<DOUBLE>",
	"<DOUBLE>"
	},
	new int[] {1, 1, 1, 1, 1, 1, 1, 1, 1});
	}

	public void testMix2() throws IOException {
	assertAnalyzesTo(
	analyzer,
	"あいうえおabんcかきくけこ",
	new String[] {"あい", "いう", "うえ", "えお", "ab", "ん", "c", "かき", "きく", "くけ", "こ"},
	new int[] {0, 1, 2, 3, 5, 7, 8, 9, 10, 11, 14},
	new int[] {2, 3, 4, 5, 7, 8, 9, 11, 12, 13, 15},
	new String[] {
	"<DOUBLE>",
	"<DOUBLE>",
	"<DOUBLE>",
	"<DOUBLE>",
	"<ALPHANUM>",
	"<SINGLE>",
	"<ALPHANUM>",
	"<DOUBLE>",
	"<DOUBLE>",
	"<DOUBLE>",
	"<SINGLE>"
	},
	new int[] {1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1});
	}

	/** Non-english text (outside of CJK) is treated normally, according to unicode rules */
	public void testNonIdeographic() throws IOException {
	assertAnalyzesTo(
	analyzer,
	"一 روبرت موير",
	new String[] {"一", "روبرت", "موير"},
	new int[] {0, 2, 8},
	new int[] {1, 7, 12},
	new String[] {"<SINGLE>", "<ALPHANUM>", "<ALPHANUM>"},
	new int[] {1, 1, 1});
	}

	/** Same as the above, except with a nonspacing mark to show correctness. */
	public void testNonIdeographicNonLetter() throws IOException {
	assertAnalyzesTo(
	analyzer,
	"一 رُوبرت موير",
	new String[] {"一", "رُوبرت", "موير"},
	new int[] {0, 2, 9},
	new int[] {1, 8, 13},
	new String[] {"<SINGLE>", "<ALPHANUM>", "<ALPHANUM>"},
	new int[] {1, 1, 1});
	}

	public void testSurrogates() throws IOException {
	assertAnalyzesTo(
	analyzer,
	"𩬅艱鍟䇹愯瀛",
	new String[] {"𩬅艱", "艱鍟", "鍟䇹", "䇹愯", "愯瀛"},
	new int[] {0, 2, 3, 4, 5},
	new int[] {3, 4, 5, 6, 7},
	new String[] {"<DOUBLE>", "<DOUBLE>", "<DOUBLE>", "<DOUBLE>", "<DOUBLE>"},
	new int[] {1, 1, 1, 1, 1});
	}

	public void testReusableTokenStream() throws IOException {
	assertAnalyzesTo(
	analyzer,
	"あいうえおabcかきくけこ",
	new String[] {"あい", "いう", "うえ", "えお", "abc", "かき", "きく", "くけ", "けこ"},
	new int[] {0, 1, 2, 3, 5, 8, 9, 10, 11},
	new int[] {2, 3, 4, 5, 8, 10, 11, 12, 13},
	new String[] {
	"<DOUBLE>",
	"<DOUBLE>",
	"<DOUBLE>",
	"<DOUBLE>",
	"<ALPHANUM>",
	"<DOUBLE>",
	"<DOUBLE>",
	"<DOUBLE>",
	"<DOUBLE>"
	},
	new int[] {1, 1, 1, 1, 1, 1, 1, 1, 1});

	assertAnalyzesTo(
	analyzer,
	"あいうえおabんcかきくけこ",
	new String[] {"あい", "いう", "うえ", "えお", "ab", "ん", "c", "かき", "きく", "くけ", "こ"},
	new int[] {0, 1, 2, 3, 5, 7, 8, 9, 10, 11, 14},
	new int[] {2, 3, 4, 5, 7, 8, 9, 11, 12, 13, 15},
	new String[] {
	"<DOUBLE>",
	"<DOUBLE>",
	"<DOUBLE>",
	"<DOUBLE>",
	"<ALPHANUM>",
	"<SINGLE>",
	"<ALPHANUM>",
	"<DOUBLE>",
	"<DOUBLE>",
	"<DOUBLE>",
	"<SINGLE>"
	},
	new int[] {1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1});
	}

	public void testSingleChar() throws IOException {
	assertAnalyzesTo(
	analyzer,
	"一",
	new String[] {"一"},
	new int[] {0},
	new int[] {1},
	new String[] {"<SINGLE>"},
	new int[] {1});
	}

	public void testTokenStream() throws IOException {
	assertAnalyzesTo(
	analyzer,
	"一丁丂",
	new String[] {"一丁", "丁丂"},
	new int[] {0, 1},
	new int[] {2, 3},
	new String[] {"<DOUBLE>", "<DOUBLE>"},
	new int[] {1, 1});
	}

	/** test that offsets are correct when mappingcharfilter is previously applied */
	public void testChangedOffsets() throws IOException {
	final NormalizeCharMap.Builder builder = new NormalizeCharMap.Builder();
	builder.add("a", "一二");
	builder.add("b", "二三");
	final NormalizeCharMap norm = builder.build();
	Analyzer analyzer =
	new Analyzer() {
	@Override
	protected TokenStreamComponents createComponents(String fieldName) {
	Tokenizer tokenizer = new StandardTokenizer();
	return new TokenStreamComponents(tokenizer, new CJKBigramFilter(tokenizer));
	}

	@Override
	protected Reader initReader(String fieldName, Reader reader) {
	return new MappingCharFilter(norm, reader);
	}
	};

	assertAnalyzesTo(
	analyzer, "ab", new String[] {"一二", "二二", "二三"}, new int[] {0, 0, 1}, new int[] {1, 1, 2});

	// note: offsets are strange since this is how the charfilter maps them...
	// before bigramming, the 4 tokens look like:
	// { 0, 0, 1, 1 },
	// { 0, 1, 1, 2 }

	analyzer.close();
	}

	private static class FakeStandardTokenizer extends TokenFilter {
	final TypeAttribute typeAtt = addAttribute(TypeAttribute.class);

	public FakeStandardTokenizer(TokenStream input) {
	super(input);
	}

	@Override
	public boolean incrementToken() throws IOException {
	if (input.incrementToken()) {
	typeAtt.setType(StandardTokenizer.TOKEN_TYPES[StandardTokenizer.IDEOGRAPHIC]);
	return true;
	} else {
	return false;
	}
	}
	}

	public void testSingleChar2() throws Exception {
	Analyzer analyzer =
	new Analyzer() {

	@Override
	protected TokenStreamComponents createComponents(String fieldName) {
	Tokenizer tokenizer = new MockTokenizer(MockTokenizer.WHITESPACE, false);
	TokenFilter filter = new FakeStandardTokenizer(tokenizer);
	filter = new StopFilter(filter, CharArraySet.EMPTY_SET);
	filter = new CJKBigramFilter(filter);
	return new TokenStreamComponents(tokenizer, filter);
	}
	};

	assertAnalyzesTo(
	analyzer,
	"一",
	new String[] {"一"},
	new int[] {0},
	new int[] {1},
	new String[] {"<SINGLE>"},
	new int[] {1});
	analyzer.close();
	}

	/** blast some random strings through the analyzer */
	public void testRandomStrings() throws Exception {
	Analyzer a = new CJKAnalyzer();
	checkRandomData(random(), a, 200 * RANDOM_MULTIPLIER);
	a.close();
	}

	/** blast some random strings through the analyzer */
	public void testRandomHugeStrings() throws Exception {
	Analyzer a = new CJKAnalyzer();
	checkRandomData(random(), a, 10 * RANDOM_MULTIPLIER, 8192);
	a.close();
	}

	public void testEmptyTerm() throws IOException {
	Analyzer a =
	new Analyzer() {
	@Override
	protected TokenStreamComponents createComponents(String fieldName) {
	Tokenizer tokenizer = new KeywordTokenizer();
	return new TokenStreamComponents(tokenizer, new CJKBigramFilter(tokenizer));
	}
	};
	checkOneTerm(a, "", "");
	a.close();
	}
	}