/**
* This case results in a single root leaf filled to capacity.
*
* @throws IOException
*/
public void test_buildOrder10() throws Exception {
final BTree btree = getProblem1();
doBuildAndDiscardCache(btree, 10 /* m */);
/*
* Verify that we can load the index file and that the metadata
* associated with the index file is correct (we are only checking those
* aspects that are easily defined by the test case and not, for
* example, those aspects that depend on the specifics of the length of
* serialized nodes or leaves).
*/
final IndexSegmentStore segStore = new IndexSegmentStore(outFile);
assertEquals("#nodes", 0, segStore.getCheckpoint().nnodes);
assertEquals("#leaves", 1, segStore.getCheckpoint().nleaves);
assertEquals("#entries", 10, segStore.getCheckpoint().nentries);
assertEquals("height", 0, segStore.getCheckpoint().height);
assertEquals(segStore.getCheckpoint().addrRoot, segStore.getCheckpoint().addrFirstLeaf);
assertEquals(segStore.getCheckpoint().addrFirstLeaf, segStore.getCheckpoint().addrLastLeaf);
final IndexSegment seg = segStore.loadIndexSegment();
try {
assertEquals(10, seg.getBranchingFactor());
assertEquals(0, seg.getHeight());
assertEquals(1, seg.getLeafCount());
assertEquals(0, seg.getNodeCount());
assertEquals(10, seg.getEntryCount());
final ImmutableLeaf leaf = seg.readLeaf(segStore.getCheckpoint().addrRoot);
assertEquals("priorAddr", 0L, leaf.getPriorAddr());
assertEquals("nextAddr", 0L, leaf.getNextAddr());
final ImmutableLeafCursor itr = seg.newLeafCursor(SeekEnum.First);
// if(LRUNexus.INSTANCE!=null)
// assertTrue(leaf.getDelegate() == itr.leaf().getDelegate()); // Note: test depends on
// cache.
assertNull(itr.prior());
assertNull(itr.next());
// test index segment structure.
dumpIndexSegment(seg);
/*
* verify the right keys in the right leaves.
*/
{
Leaf root = (Leaf) seg.getRoot();
assertKeys(new int[] {1, 2, 3, 4, 5, 6, 7, 8, 9, 10}, root);
}
/*
* Verify the total index order.
*/
assertSameBTree(btree, seg);
} finally {
// close so we can delete the backing store.
seg.close();
}
}
/**
* This case results in a root node and two leaves. Each leaf is at its minimum capacity (5). This
* tests an edge case for the algorithm that distributes the keys among the leaves when there
* would otherwise be an underflow in the last leaf.
*
* @throws IOException
*/
public void test_buildOrder9() throws Exception {
final BTree btree = getProblem1();
doBuildAndDiscardCache(btree, 9 /*m*/);
// final long commitTime = System.currentTimeMillis();
//
// IndexSegmentBuilder.newInstance(outFile, tmpDir, btree.getEntryCount(), btree
// .rangeIterator(), 9/* m */, btree.getIndexMetadata(), commitTime,
// true/*compactingMerge*/,bufferNodes).call();
/*
* Verify that we can load the index file and that the metadata
* associated with the index file is correct (we are only checking those
* aspects that are easily defined by the test case and not, for
* example, those aspects that depend on the specifics of the length of
* serialized nodes or leaves).
*/
final IndexSegmentStore segStore = new IndexSegmentStore(outFile);
assertEquals("#nodes", 1, segStore.getCheckpoint().nnodes);
assertEquals("#leaves", 2, segStore.getCheckpoint().nleaves);
assertEquals("#entries", 10, segStore.getCheckpoint().nentries);
assertEquals("height", 1, segStore.getCheckpoint().height);
assertNotSame(segStore.getCheckpoint().addrRoot, segStore.getCheckpoint().addrFirstLeaf);
assertNotSame(segStore.getCheckpoint().addrFirstLeaf, segStore.getCheckpoint().addrLastLeaf);
final IndexSegment seg = segStore.loadIndexSegment();
try {
assertEquals(9, seg.getBranchingFactor());
assertEquals(1, seg.getHeight());
assertEquals(2, seg.getLeafCount());
assertEquals(1, seg.getNodeCount());
assertEquals(10, seg.getEntryCount());
final ImmutableLeaf firstLeaf = seg.readLeaf(segStore.getCheckpoint().addrFirstLeaf);
assertEquals("priorAddr", 0L, firstLeaf.getPriorAddr());
assertEquals("nextAddr", segStore.getCheckpoint().addrLastLeaf, firstLeaf.getNextAddr());
final ImmutableLeaf lastLeaf = seg.readLeaf(segStore.getCheckpoint().addrLastLeaf);
assertEquals("priorAddr", segStore.getCheckpoint().addrFirstLeaf, lastLeaf.getPriorAddr());
assertEquals("nextAddr", 0L, lastLeaf.getNextAddr());
// test forward scan
{
final ImmutableLeafCursor itr = seg.newLeafCursor(SeekEnum.First);
// if(LRUNexus.INSTANCE!=null)
// assertTrue(firstLeaf.getDelegate() == itr.leaf().getDelegate()); // Note: test
// depends on cache!
assertNull(itr.prior());
// if(LRUNexus.INSTANCE!=null)
// assertTrue(lastLeaf.getDelegate() == itr.next().getDelegate()); // Note: test
// depends on cache!
// if(LRUNexus.INSTANCE!=null)
// assertTrue(lastLeaf.getDelegate() == itr.leaf().getDelegate()); // Note: test
// depends on cache!
}
/*
* test reverse scan
*
* Note: the scan starts with the last leaf in the key order and then
* proceeds in reverse key order.
*/
{
final ImmutableLeafCursor itr = seg.newLeafCursor(SeekEnum.Last);
// if(LRUNexus.INSTANCE!=null)
// assertTrue(lastLeaf.getDelegate() == itr.leaf().getDelegate()); // Note: test
// depends on cache!
assertNull(itr.next());
// if(LRUNexus.INSTANCE!=null)
// assertTrue(firstLeaf.getDelegate() == itr.prior().getDelegate()); // Note:
// test depends on cache!
// if(LRUNexus.INSTANCE!=null)
// assertTrue(firstLeaf.getDelegate() == itr.leaf().getDelegate()); // Note: test
// depends on cache!
}
// test index segment structure.
dumpIndexSegment(seg);
/*
* Test the tree in detail.
*/
{
final Node A = (Node) seg.getRoot();
final Leaf a = (Leaf) A.getChild(0);
final Leaf b = (Leaf) A.getChild(1);
assertKeys(new int[] {6}, A);
assertEntryCounts(new int[] {5, 5}, A);
assertKeys(new int[] {1, 2, 3, 4, 5}, a);
assertKeys(new int[] {6, 7, 8, 9, 10}, b);
// Note: values are verified by testing the total order.
}
/*
* Verify the total index order.
*/
assertSameBTree(btree, seg);
} finally {
// close so we can delete the backing store.
seg.close();
}
}