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LUCENE-3841: add direct test for prefix-coded byte[] spanning two pages 

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1300753 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Michael McCandless 2012-03-14 22:09:34 +00:00
parent 24bce3e8b7
commit e943c4b76e
2 changed files with 23 additions and 2 deletions
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2
lucene/core/src/java/org/apache/lucene/util/PagedBytes.java
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@ -214,8 +214,6 @@ public final class PagedBytes {
// VarDerefBytesImpl.finishInternal does its own
// prefix + byte[] writing which can span two blocks,
// so we support that here on decode:
// we could some day relax that and span two blocks:
if (blockSize - offset >= length) {
// Within block
b.offset = offset;

23
lucene/core/src/test/org/apache/lucene/util/TestPagedBytes.java
View File

@ -107,4 +107,27 @@ public class TestPagedBytes extends LuceneTestCase {
}
}
}
// LUCENE-3841: even though
// copyUsingLengthPrefix will never span two blocks, make
// sure if caller writes their own prefix followed by the
// bytes, it still works:
public void testLengthPrefixAcrossTwoBlocks() throws Exception {
final PagedBytes p = new PagedBytes(10);
final DataOutput out = p.getDataOutput();
final byte[] bytes1 = new byte[1000];
random.nextBytes(bytes1);
out.writeBytes(bytes1, 0, bytes1.length);
out.writeByte((byte) 40);
final byte[] bytes2 = new byte[40];
random.nextBytes(bytes2);
out.writeBytes(bytes2, 0, bytes2.length);
final PagedBytes.Reader reader = p.freeze(random.nextBoolean());
BytesRef answer = reader.fillSliceWithPrefix(new BytesRef(), 1000);
assertEquals(40, answer.length);
for(int i=0;i<40;i++) {
assertEquals(bytes2[i], answer.bytes[answer.offset + i]);
}
}
}