@Test
public void testSerialization() throws Exception {
Range<Token> first = new Range<>(tok(3), tok(4));
Collection<Range<Token>> ranges = new ArrayList<>();
ranges.add(first);
ranges.add(new Range<Token>(tok(5), tok(2)));
mts = new MerkleTrees(partitioner);
mts.addMerkleTrees(256, ranges);
// populate and validate the tree
mts.init();
for (TreeRange range : mts.invalids()) range.addAll(new HIterator(range.right));
byte[] initialhash = mts.hash(first);
long serializedSize =
MerkleTrees.serializer.serializedSize(mts, MessagingService.current_version);
DataOutputBuffer out = new DataOutputBuffer();
MerkleTrees.serializer.serialize(mts, out, MessagingService.current_version);
byte[] serialized = out.toByteArray();
assertEquals(serializedSize, serialized.length);
DataInputBuffer in = new DataInputBuffer(serialized);
MerkleTrees restored = MerkleTrees.serializer.deserialize(in, MessagingService.current_version);
assertHashEquals(initialhash, restored.hash(first));
}
@Test
public void testDifference() {
int maxsize = 16;
mts = new MerkleTrees(partitioner);
mts.addMerkleTree(32, fullRange());
MerkleTrees mts2 = new MerkleTrees(partitioner);
mts2.addMerkleTree(32, fullRange());
mts.init();
mts2.init();
// add dummy hashes to both trees
for (TreeRange range : mts.invalids()) range.addAll(new HIterator(range.right));
for (TreeRange range : mts2.invalids()) range.addAll(new HIterator(range.right));
TreeRange leftmost = null;
TreeRange middle = null;
mts.maxsize(fullRange(), maxsize + 2); // give some room for splitting
// split the leftmost
Iterator<TreeRange> ranges = mts.invalids();
leftmost = ranges.next();
mts.split(leftmost.right);
// set the hashes for the leaf of the created split
middle = mts.get(leftmost.right);
middle.hash("arbitrary!".getBytes());
mts.get(partitioner.midpoint(leftmost.left, leftmost.right))
.hash("even more arbitrary!".getBytes());
// trees should disagree for (leftmost.left, middle.right]
List<Range<Token>> diffs = MerkleTrees.difference(mts, mts2);
assertEquals(diffs + " contains wrong number of differences:", 1, diffs.size());
assertTrue(diffs.contains(new Range<>(leftmost.left, middle.right)));
}