@Test
public void testHashInner() {
byte[] val = DUMMY;
byte[] lchildval = hashed(val, 3, 3, 2);
byte[] rchildval = hashed(val, 2, 2);
byte[] fullval = hashed(val, 3, 3, 2, 2, 2);
Range<Token> full = new Range<>(tok(-1), tok(-1));
Range<Token> lchild = new Range<>(tok(-1), tok(4));
Range<Token> rchild = new Range<>(tok(4), tok(-1));
Range<Token> invalid = new Range<>(tok(1), tok(-1));
// (zero,one] (one, two] (two,four] (four, six] (six, zero]
mts.split(tok(4));
mts.split(tok(2));
mts.split(tok(6));
mts.split(tok(1));
assertNull(mts.hash(full));
assertNull(mts.hash(lchild));
assertNull(mts.hash(rchild));
assertNull(mts.hash(invalid));
// validate the range
mts.get(tok(1)).hash(val);
mts.get(tok(2)).hash(val);
mts.get(tok(4)).hash(val);
mts.get(tok(6)).hash(val);
mts.get(tok(-1)).hash(val);
assertHashEquals(fullval, mts.hash(full));
assertHashEquals(lchildval, mts.hash(lchild));
assertHashEquals(rchildval, mts.hash(rchild));
assertNull(mts.hash(invalid));
}
@Test
public void testHashDegenerate() {
TOKEN_SCALE = new BigInteger("32");
byte[] val = DUMMY;
byte[] childfullval = hashed(val, 5, 5, 4);
byte[] fullval = hashed(val, 5, 5, 4, 3, 2, 1);
Range<Token> childfull = new Range<>(tok(-1), tok(4));
Range<Token> full = new Range<>(tok(-1), tok(-1));
Range<Token> invalid = new Range<>(tok(4), tok(-1));
mts.split(tok(16));
mts.split(tok(8));
mts.split(tok(4));
mts.split(tok(2));
mts.split(tok(1));
assertNull(mts.hash(full));
assertNull(mts.hash(childfull));
assertNull(mts.hash(invalid));
// validate the range
mts.get(tok(1)).hash(val);
mts.get(tok(2)).hash(val);
mts.get(tok(4)).hash(val);
mts.get(tok(8)).hash(val);
mts.get(tok(16)).hash(val);
mts.get(tok(-1)).hash(val);
assertHashEquals(fullval, mts.hash(full));
assertHashEquals(childfullval, mts.hash(childfull));
assertNull(mts.hash(invalid));
}
@Test
public void testHashPartial() {
byte[] val = DUMMY;
byte[] leftval = hashed(val, 1, 1);
byte[] partialval = hashed(val, 1);
Range<Token> left = new Range<>(tok(-1), tok(4));
Range<Token> partial = new Range<>(tok(2), tok(4));
Range<Token> right = new Range<>(tok(4), tok(-1));
Range<Token> linvalid = new Range<>(tok(1), tok(4));
Range<Token> rinvalid = new Range<>(tok(4), tok(6));
// (zero,two] (two,four] (four, zero]
mts.split(tok(4));
mts.split(tok(2));
assertNull(mts.hash(left));
assertNull(mts.hash(partial));
assertNull(mts.hash(right));
assertNull(mts.hash(linvalid));
assertNull(mts.hash(rinvalid));
// validate the range
mts.get(tok(2)).hash(val);
mts.get(tok(4)).hash(val);
mts.get(tok(-1)).hash(val);
assertHashEquals(leftval, mts.hash(left));
assertHashEquals(partialval, mts.hash(partial));
assertHashEquals(val, mts.hash(right));
assertNull(mts.hash(linvalid));
assertNull(mts.hash(rinvalid));
}
@Test
public void testSplitLimitSize() {
mts = new MerkleTrees(partitioner);
mts.addMerkleTree(2, fullRange());
assertTrue(mts.split(tok(4)));
assertEquals(2, mts.size());
// should fail to split above maxsize
assertFalse(mts.split(tok(2)));
assertEquals(2, mts.size());
assertEquals(new Range<>(tok(4), tok(-1)), mts.get(tok(-1)));
assertEquals(new Range<>(tok(-1), tok(4)), mts.get(tok(4)));
}
@Test
public void testSplitLimitDepth() {
mts = new MerkleTrees(partitioner);
mts.addMerkleTree(Integer.MAX_VALUE, (byte) 2, fullRange());
assertTrue(mts.split(tok(4)));
assertTrue(mts.split(tok(2)));
assertEquals(3, mts.size());
// should fail to split below hashdepth
assertFalse(mts.split(tok(1)));
assertEquals(3, mts.size());
assertEquals(new Range<>(tok(4), tok(-1)), mts.get(tok(-1)));
assertEquals(new Range<>(tok(-1), tok(2)), mts.get(tok(2)));
assertEquals(new Range<>(tok(2), tok(4)), mts.get(tok(4)));
}
@Test
public void testSplit() {
// split the range (zero, zero] into:
// (zero,four], (four,six], (six,seven] and (seven, zero]
mts.split(tok(4));
mts.split(tok(6));
mts.split(tok(7));
assertEquals(4, mts.size());
assertEquals(new Range<>(tok(7), tok(-1)), mts.get(tok(-1)));
assertEquals(new Range<>(tok(-1), tok(4)), mts.get(tok(3)));
assertEquals(new Range<>(tok(-1), tok(4)), mts.get(tok(4)));
assertEquals(new Range<>(tok(4), tok(6)), mts.get(tok(6)));
assertEquals(new Range<>(tok(6), tok(7)), mts.get(tok(7)));
// check depths
assertEquals((byte) 1, mts.get(tok(4)).depth);
assertEquals((byte) 2, mts.get(tok(6)).depth);
assertEquals((byte) 3, mts.get(tok(7)).depth);
assertEquals((byte) 3, mts.get(tok(-1)).depth);
try {
mts.split(tok(-1));
fail("Shouldn't be able to split outside the initial range.");
} catch (AssertionError e) {
// pass
}
}
@Test
public void testHashFull() {
byte[] val = DUMMY;
Range<Token> range = new Range<>(tok(-1), tok(-1));
// (zero, zero]
assertNull(mts.hash(range));
// validate the range
mts.get(tok(-1)).hash(val);
assertHashEquals(val, mts.hash(range));
}
@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)));
}