private void readIndexInputFullyWithRandomSeeks(IndexInput indexInput) throws IOException {
BytesRef ref = new BytesRef(scaledRandomIntBetween(1, 1024));
long pos = 0;
while (pos < indexInput.length()) {
assertEquals(pos, indexInput.getFilePointer());
int op = random().nextInt(5);
if (op == 0) {
int shift = 100 - randomIntBetween(0, 200);
pos = Math.min(indexInput.length() - 1, Math.max(0, pos + shift));
indexInput.seek(pos);
} else if (op == 1) {
indexInput.readByte();
pos++;
} else {
int min = (int) Math.min(indexInput.length() - pos, ref.bytes.length);
indexInput.readBytes(ref.bytes, ref.offset, min);
pos += min;
}
}
}
@Test
public void testVerifyingIndexOutput() throws IOException {
Directory dir = newDirectory();
IndexOutput output = dir.createOutput("foo.bar", IOContext.DEFAULT);
int iters = scaledRandomIntBetween(10, 100);
for (int i = 0; i < iters; i++) {
BytesRef bytesRef = new BytesRef(TestUtil.randomRealisticUnicodeString(random(), 10, 1024));
output.writeBytes(bytesRef.bytes, bytesRef.offset, bytesRef.length);
}
CodecUtil.writeFooter(output);
output.close();
IndexInput indexInput = dir.openInput("foo.bar", IOContext.DEFAULT);
String checksum = Store.digestToString(CodecUtil.retrieveChecksum(indexInput));
indexInput.seek(0);
BytesRef ref = new BytesRef(scaledRandomIntBetween(1, 1024));
long length = indexInput.length();
IndexOutput verifyingOutput =
new Store.LuceneVerifyingIndexOutput(
new StoreFileMetaData("foo1.bar", length, checksum),
dir.createOutput("foo1.bar", IOContext.DEFAULT));
while (length > 0) {
if (random().nextInt(10) == 0) {
verifyingOutput.writeByte(indexInput.readByte());
length--;
} else {
int min = (int) Math.min(length, ref.bytes.length);
indexInput.readBytes(ref.bytes, ref.offset, min);
verifyingOutput.writeBytes(ref.bytes, ref.offset, min);
length -= min;
}
}
Store.verify(verifyingOutput);
verifyingOutput.writeByte((byte) 0x0);
try {
Store.verify(verifyingOutput);
fail("should be a corrupted index");
} catch (CorruptIndexException | IndexFormatTooOldException | IndexFormatTooNewException ex) {
// ok
}
IOUtils.close(indexInput, verifyingOutput, dir);
}