public void testDiscreteMultiValueHighlighting() throws Exception {
    makeIndexShortMV();

    FieldQuery fq = new FieldQuery(tq("d"), true, true);
    FieldTermStack stack = new FieldTermStack(reader, 0, F, fq);
    FieldPhraseList fpl = new FieldPhraseList(stack, fq);
    SimpleFragListBuilder sflb = new SimpleFragListBuilder();
    FieldFragList ffl = sflb.createFieldFragList(fpl, 100);
    SimpleFragmentsBuilder sfb = new SimpleFragmentsBuilder();
    sfb.setDiscreteMultiValueHighlighting(true);
    assertEquals("<b>d</b> e", sfb.createFragment(reader, 0, F, ffl));

    make1dmfIndex("some text to highlight", "highlight other text");
    fq = new FieldQuery(tq("text"), true, true);
    stack = new FieldTermStack(reader, 0, F, fq);
    fpl = new FieldPhraseList(stack, fq);
    sflb = new SimpleFragListBuilder();
    ffl = sflb.createFieldFragList(fpl, 32);
    String[] result = sfb.createFragments(reader, 0, F, ffl, 3);
    assertEquals(2, result.length);
    assertEquals("some <b>text</b> to highlight", result[0]);
    assertEquals("other <b>text</b>", result[1]);

    fq = new FieldQuery(tq("highlight"), true, true);
    stack = new FieldTermStack(reader, 0, F, fq);
    fpl = new FieldPhraseList(stack, fq);
    sflb = new SimpleFragListBuilder();
    ffl = sflb.createFieldFragList(fpl, 32);
    result = sfb.createFragments(reader, 0, F, ffl, 3);
    assertEquals(2, result.length);
    assertEquals("text to <b>highlight</b>", result[0]);
    assertEquals("<b>highlight</b> other text", result[1]);
  }
 public void testTagsAndEncoder() throws Exception {
   FieldFragList ffl = ffl(new TermQuery(new Term(F, "a")), "<h1> a </h1>");
   SimpleFragmentsBuilder sfb = new SimpleFragmentsBuilder();
   String[] preTags = {"["};
   String[] postTags = {"]"};
   assertEquals(
       "&lt;h1&gt; [a] &lt;/h1&gt;",
       sfb.createFragment(reader, 0, F, ffl, preTags, postTags, new SimpleHTMLEncoder()));
 }
 public void test2Frags() throws Exception {
   FieldFragList ffl = ffl(new TermQuery(new Term(F, "a")), "a b b b b b b b b b b b a b a b");
   SimpleFragmentsBuilder sfb = new SimpleFragmentsBuilder();
   String[] f = sfb.createFragments(reader, 0, F, ffl, 3);
   // 3 snippets requested, but should be 2
   assertEquals(2, f.length);
   assertEquals("<b>a</b> b b b b b b b b b b", f[0]);
   assertEquals("b b <b>a</b> b <b>a</b> b", f[1]);
 }
  public void test1TermIndex() throws Exception {
    FieldFragList ffl = ffl(new TermQuery(new Term(F, "a")), "a");
    SimpleFragmentsBuilder sfb = new SimpleFragmentsBuilder();
    assertEquals("<b>a</b>", sfb.createFragment(reader, 0, F, ffl));

    // change tags
    sfb = new SimpleFragmentsBuilder(new String[] {"["}, new String[] {"]"});
    assertEquals("[a]", sfb.createFragment(reader, 0, F, ffl));
  }
  public void testUnstoredField() throws Exception {
    makeUnstoredIndex();

    FieldQuery fq = new FieldQuery(tq("aaa"), true, true);
    FieldTermStack stack = new FieldTermStack(reader, 0, F, fq);
    FieldPhraseList fpl = new FieldPhraseList(stack, fq);
    SimpleFragListBuilder sflb = new SimpleFragListBuilder();
    FieldFragList ffl = sflb.createFieldFragList(fpl, 100);
    SimpleFragmentsBuilder sfb = new SimpleFragmentsBuilder();
    assertNull(sfb.createFragment(reader, 0, F, ffl));
  }
  public void test1PhraseShortMV() throws Exception {
    makeIndexShortMV();

    FieldQuery fq = new FieldQuery(tq("d"), true, true);
    FieldTermStack stack = new FieldTermStack(reader, 0, F, fq);
    FieldPhraseList fpl = new FieldPhraseList(stack, fq);
    SimpleFragListBuilder sflb = new SimpleFragListBuilder();
    FieldFragList ffl = sflb.createFieldFragList(fpl, 100);
    SimpleFragmentsBuilder sfb = new SimpleFragmentsBuilder();
    assertEquals("a b c  <b>d</b> e", sfb.createFragment(reader, 0, F, ffl));
  }
  public void test1StrMV() throws Exception {
    makeIndexStrMV();

    FieldQuery fq = new FieldQuery(tq("defg"), true, true);
    FieldTermStack stack = new FieldTermStack(reader, 0, F, fq);
    FieldPhraseList fpl = new FieldPhraseList(stack, fq);
    SimpleFragListBuilder sflb = new SimpleFragListBuilder();
    FieldFragList ffl = sflb.createFieldFragList(fpl, 100);
    SimpleFragmentsBuilder sfb = new SimpleFragmentsBuilder();
    sfb.setMultiValuedSeparator('/');
    assertEquals("abc/<b>defg</b>/hijkl", sfb.createFragment(reader, 0, F, ffl));
  }
  public void test3Frags() throws Exception {
    BooleanQuery booleanQuery = new BooleanQuery();
    booleanQuery.add(new TermQuery(new Term(F, "a")), BooleanClause.Occur.SHOULD);
    booleanQuery.add(new TermQuery(new Term(F, "c")), BooleanClause.Occur.SHOULD);

    FieldFragList ffl = ffl(booleanQuery, "a b b b b b b b b b b b a b a b b b b b c a a b b");
    SimpleFragmentsBuilder sfb = new SimpleFragmentsBuilder();
    String[] f = sfb.createFragments(reader, 0, F, ffl, 3);
    assertEquals(3, f.length);
    assertEquals("<b>a</b> b b b b b b b b b b", f[0]);
    assertEquals("b b <b>a</b> b <b>a</b> b b b b b c", f[1]);
    assertEquals("<b>c</b> <b>a</b> <b>a</b> b b", f[2]);
  }
  public void test1PhraseLongMVB() throws Exception {
    makeIndexLongMVB();

    FieldQuery fq =
        new FieldQuery(
            pqF("sp", "pe", "ee", "ed"), true, true); // "speed" -(2gram)-> "sp","pe","ee","ed"
    FieldTermStack stack = new FieldTermStack(reader, 0, F, fq);
    FieldPhraseList fpl = new FieldPhraseList(stack, fq);
    SimpleFragListBuilder sflb = new SimpleFragListBuilder();
    FieldFragList ffl = sflb.createFieldFragList(fpl, 100);
    SimpleFragmentsBuilder sfb = new SimpleFragmentsBuilder();
    assertEquals("processing <b>speed</b>, the", sfb.createFragment(reader, 0, F, ffl));
  }
  public void test1PhraseLongMV() throws Exception {
    makeIndexLongMV();

    FieldQuery fq = new FieldQuery(pqF("search", "engines"), true, true);
    FieldTermStack stack = new FieldTermStack(reader, 0, F, fq);
    FieldPhraseList fpl = new FieldPhraseList(stack, fq);
    SimpleFragListBuilder sflb = new SimpleFragListBuilder();
    FieldFragList ffl = sflb.createFieldFragList(fpl, 100);
    SimpleFragmentsBuilder sfb = new SimpleFragmentsBuilder();
    assertEquals(
        "The most <b>search engines</b> use only one of these methods. Even the <b>search engines</b> that says they can use the",
        sfb.createFragment(reader, 0, F, ffl));
  }
  public void testRandomDiscreteMultiValueHighlighting() throws Exception {
    String[] randomValues = new String[3 + random().nextInt(10 * RANDOM_MULTIPLIER)];
    for (int i = 0; i < randomValues.length; i++) {
      String randomValue;
      do {
        randomValue = _TestUtil.randomSimpleString(random());
      } while ("".equals(randomValue));
      randomValues[i] = randomValue;
    }

    Directory dir = newDirectory();
    RandomIndexWriter writer =
        new RandomIndexWriter(
            random(),
            dir,
            newIndexWriterConfig(TEST_VERSION_CURRENT, new MockAnalyzer(random()))
                .setMergePolicy(newLogMergePolicy()));

    FieldType customType = new FieldType(TextField.TYPE_STORED);
    customType.setStoreTermVectors(true);
    customType.setStoreTermVectorOffsets(true);
    customType.setStoreTermVectorPositions(true);

    int numDocs = randomValues.length * 5;
    int numFields = 2 + random().nextInt(5);
    int numTerms = 2 + random().nextInt(3);
    List<Doc> docs = new ArrayList<Doc>(numDocs);
    List<Document> documents = new ArrayList<Document>(numDocs);
    Map<String, Set<Integer>> valueToDocId = new HashMap<String, Set<Integer>>();
    for (int i = 0; i < numDocs; i++) {
      Document document = new Document();
      String[][] fields = new String[numFields][numTerms];
      for (int j = 0; j < numFields; j++) {
        String[] fieldValues = new String[numTerms];
        fieldValues[0] = getRandomValue(randomValues, valueToDocId, i);
        StringBuilder builder = new StringBuilder(fieldValues[0]);
        for (int k = 1; k < numTerms; k++) {
          fieldValues[k] = getRandomValue(randomValues, valueToDocId, i);
          builder.append(' ').append(fieldValues[k]);
        }
        document.add(new Field(F, builder.toString(), customType));
        fields[j] = fieldValues;
      }
      docs.add(new Doc(fields));
      documents.add(document);
    }
    writer.addDocuments(documents);
    writer.close();
    IndexReader reader = DirectoryReader.open(dir);

    try {
      int highlightIters = 1 + random().nextInt(120 * RANDOM_MULTIPLIER);
      for (int highlightIter = 0; highlightIter < highlightIters; highlightIter++) {
        String queryTerm = randomValues[random().nextInt(randomValues.length)];
        int randomHit = valueToDocId.get(queryTerm).iterator().next();
        List<StringBuilder> builders = new ArrayList<StringBuilder>();
        for (String[] fieldValues : docs.get(randomHit).fieldValues) {
          StringBuilder builder = new StringBuilder();
          boolean hit = false;
          for (int i = 0; i < fieldValues.length; i++) {
            if (queryTerm.equals(fieldValues[i])) {
              builder.append("<b>").append(queryTerm).append("</b>");
              hit = true;
            } else {
              builder.append(fieldValues[i]);
            }
            if (i != fieldValues.length - 1) {
              builder.append(' ');
            }
          }
          if (hit) {
            builders.add(builder);
          }
        }

        FieldQuery fq = new FieldQuery(tq(queryTerm), true, true);
        FieldTermStack stack = new FieldTermStack(reader, randomHit, F, fq);

        FieldPhraseList fpl = new FieldPhraseList(stack, fq);
        SimpleFragListBuilder sflb = new SimpleFragListBuilder(100);
        FieldFragList ffl = sflb.createFieldFragList(fpl, 300);

        SimpleFragmentsBuilder sfb = new SimpleFragmentsBuilder();
        sfb.setDiscreteMultiValueHighlighting(true);
        String[] actualFragments = sfb.createFragments(reader, randomHit, F, ffl, numFields);
        assertEquals(builders.size(), actualFragments.length);
        for (int i = 0; i < actualFragments.length; i++) {
          assertEquals(builders.get(i).toString(), actualFragments[i]);
        }
      }
    } finally {
      reader.close();
      dir.close();
    }
  }