public void testTermMinMaxBasic() throws Exception {
Directory dir = newDirectory();
RandomIndexWriter w = new RandomIndexWriter(random(), dir);
Document doc = new Document();
doc.add(newTextField("field", "a b c cc ddd", Field.Store.NO));
w.addDocument(doc);
IndexReader r = w.getReader();
Terms terms = MultiFields.getTerms(r, "field");
assertEquals(new BytesRef("a"), terms.getMin());
assertEquals(new BytesRef("ddd"), terms.getMax());
r.close();
w.close();
dir.close();
}
public void testTermMinMaxRandom() throws Exception {
Directory dir = newDirectory();
RandomIndexWriter w = new RandomIndexWriter(random(), dir);
int numDocs = atLeast(100);
BytesRef minTerm = null;
BytesRef maxTerm = null;
for (int i = 0; i < numDocs; i++) {
Document doc = new Document();
Field field = new TextField("field", "", Field.Store.NO);
doc.add(field);
// System.out.println(" doc " + i);
CannedBinaryTokenStream.BinaryToken[] tokens =
new CannedBinaryTokenStream.BinaryToken[atLeast(10)];
for (int j = 0; j < tokens.length; j++) {
byte[] bytes = new byte[TestUtil.nextInt(random(), 1, 20)];
random().nextBytes(bytes);
BytesRef tokenBytes = new BytesRef(bytes);
// System.out.println(" token " + tokenBytes);
if (minTerm == null || tokenBytes.compareTo(minTerm) < 0) {
// System.out.println(" ** new min");
minTerm = tokenBytes;
}
if (maxTerm == null || tokenBytes.compareTo(maxTerm) > 0) {
// System.out.println(" ** new max");
maxTerm = tokenBytes;
}
tokens[j] = new CannedBinaryTokenStream.BinaryToken(tokenBytes);
}
field.setTokenStream(new CannedBinaryTokenStream(tokens));
w.addDocument(doc);
}
IndexReader r = w.getReader();
Terms terms = MultiFields.getTerms(r, "field");
assertEquals(minTerm, terms.getMin());
assertEquals(maxTerm, terms.getMax());
r.close();
w.close();
dir.close();
}
