public void TestOutOfOrderInsert()
{
var store = new Store();
var btree = new PersistentBTree <IntData>(store.GetNextObjectId(), 3, store);
btree.Insert(6, null);
btree.Insert(2, null);
btree.Insert(3, null);
btree.Insert(1, null);
btree.Insert(4, null);
btree.Insert(18, null);
btree.Insert(5, null);
btree.Insert(7, null);
btree.Insert(8, null);
btree.Insert(9, null);
btree.Insert(10, null);
btree.Insert(11, null);
btree.Insert(14, null);
btree.Insert(15, null);
btree.Insert(16, null);
btree.Insert(17, null);
btree.Insert(19, null);
btree.Insert(12, null);
btree.Insert(13, null);
btree.Insert(20, null);
AssertOrderInList(InOrderTraversal(btree));
Assert.AreEqual(20, InOrderTraversal(btree).Count);
}
public void TestFindExistingKey()
{
var store = new Store();
var btree = new PersistentBTree <IntData>(store.GetNextObjectId(), 5, store);
btree.Insert(3, null);
btree.Insert(10, null);
btree.Insert(2, null);
btree.Insert(7, null);
btree.Insert(5, null);
btree.Insert(4, null);
btree.Insert(1, null);
btree.Insert(12, null);
btree.Insert(19, null);
btree.Insert(11, null);
Assert.AreEqual(10, InOrderTraversal(btree).Count);
foreach (var key in InOrderTraversal(btree))
{
Node <IntData> keyNode = btree.Lookup(key);
Assert.IsNotNull(keyNode);
Assert.IsTrue(keyNode.Keys.Contains(key));
}
}
public void TestPropagatingSplit()
{
var store = new Store();
var btree = new PersistentBTree <IntData>(store.GetNextObjectId(), 3, store);
btree.Insert(1, null);
btree.Insert(2, null);
btree.Insert(3, null);
btree.Insert(4, null);
btree.Insert(5, null);
btree.Insert(6, null);
btree.Insert(7, null);
AssertOrderInList(InOrderTraversal(btree));
Assert.IsNotNull(btree.Root);
Assert.AreEqual(1, btree.Root.Keys.Count);
Assert.AreEqual(4ul, btree.Root.Keys[0].Key);
// root has two child nodes
Assert.AreEqual(2, btree.Root.ChildNodes.Count);
// 1st root child has 1 key
Assert.AreEqual(1, btree.LoadNode(btree.Root.ChildNodes[0]).Keys.Count);
Assert.AreEqual(2ul, btree.LoadNode(btree.Root.ChildNodes[0]).Keys[0].Key);
// 2nd root child has 1 keys
Assert.AreEqual(1, btree.LoadNode(btree.Root.ChildNodes[1]).Keys.Count);
Assert.AreEqual(6ul, btree.LoadNode(btree.Root.ChildNodes[1]).Keys[0].Key);
}
private static List <Entry <T> > InOrderTraversal <T>(PersistentBTree <T> tree) where T : class, IStorable
{
var keys = new List <Entry <T> >();
TraverseNode(tree, tree.Root, keys);
return(keys);
}
public void TestInsertAfterRootSplit()
{
var store = new Store();
var btree = new PersistentBTree <IntData>(store.GetNextObjectId(), 3, store);
btree.Insert(1, null);
btree.Insert(2, null);
btree.Insert(3, null);
btree.Insert(4, null);
Assert.IsNotNull(btree.Root);
Assert.AreEqual(1, btree.Root.Keys.Count);
Assert.AreEqual(2ul, btree.Root.Keys[0].Key);
// root has two child nodes
Assert.AreEqual(2, btree.Root.ChildNodes.Count);
// left child has 1 key
Assert.AreEqual(1ul, btree.LoadNode(btree.Root.ChildNodes[0]).Keys[0].Key);
Assert.AreEqual(1, btree.LoadNode(btree.Root.ChildNodes[0]).Keys.Count);
// right child has 2 keys
Assert.AreEqual(2, btree.LoadNode(btree.Root.ChildNodes[1]).Keys.Count);
Assert.AreEqual(3ul, btree.LoadNode(btree.Root.ChildNodes[1]).Keys[0].Key);
Assert.AreEqual(4ul, btree.LoadNode(btree.Root.ChildNodes[1]).Keys[1].Key);
}
public void TestExceptionWhenInsertingDuplicateKey()
{
var store = new Store();
var btree = new PersistentBTree <IntData>(2, 3, store);
btree.Insert(1, null);
btree.Insert(1, null);
}
public void TestFirstInsert()
{
var store = new Store();
var btree = new PersistentBTree <IntData>(2, 3, store);
btree.Insert(1, null);
Assert.IsNotNull(btree.Root);
Assert.AreEqual(1, btree.Root.Keys.Count);
Assert.AreEqual(1ul, btree.Root.Keys[0].Key);
}
public void TestMillionIds()
{
var start = DateTime.UtcNow;
var store = new Store();
var btree = new PersistentBTree <IntData>(2, 51, store);
for (ulong i = 0; i < 500000; i++)
{
btree.Insert(i, null);
}
var end = DateTime.UtcNow;
Console.WriteLine(end.Subtract(start).TotalMilliseconds);
}
private static void TraverseNode <T>(PersistentBTree <T> tree, Node <T> node, List <Entry <T> > keys) where T : class, IStorable
{
if (node.ChildNodes.Count == 0)
{
keys.AddRange(node.Keys);
return;
}
for (int i = 0; i < node.Keys.Count; i++)
{
TraverseNode(tree, tree.LoadNode(node.ChildNodes[i]), keys);
keys.Add(node.Keys[i]);
}
TraverseNode(tree, tree.LoadNode(node.ChildNodes.Last()), keys);
}
public void TestDeleteInLeaf()
{
var store = new Store();
var btree = new PersistentBTree <IntData>(store.GetNextObjectId(), 3, store);
btree.Insert(1, null);
btree.Insert(3, null);
btree.Insert(4, null);
btree.Insert(2, null);
btree.Insert(5, null);
btree.Delete(2);
Assert.IsNull(btree.Lookup(2));
AssertOrderInList(InOrderTraversal(btree));
}
public void TestFindNonExistantKey()
{
var store = new Store();
var btree = new PersistentBTree <IntData>(store.GetNextObjectId(), 3, store);
btree.Insert(3, null);
btree.Insert(10, null);
btree.Insert(2, null);
btree.Insert(7, null);
btree.Insert(5, null);
btree.Insert(4, null);
btree.Insert(1, null);
var keyNode = btree.Lookup(100);
Assert.IsNull(keyNode);
}
public void TestNonRootSplit()
{
var store = new Store();
var btree = new PersistentBTree <IntData>(store.GetNextObjectId(), 3, store);
btree.Insert(1, null);
btree.Insert(2, null);
btree.Insert(3, null);
btree.Insert(4, null);
btree.Insert(5, null);
AssertOrderInList(InOrderTraversal(btree));
Assert.IsNotNull(btree.Root);
Assert.AreEqual(2, btree.Root.Keys.Count);
Assert.AreEqual(2ul, btree.Root.Keys[0].Key);
Assert.AreEqual(4ul, btree.Root.Keys[1].Key);
// root has three child nodes
Assert.AreEqual(3, btree.Root.ChildNodes.Count);
// root has 2 keys
Assert.AreEqual(2ul, btree.Root.Keys[0].Key);
Assert.AreEqual(4ul, btree.Root.Keys[1].Key);
// left child has 1 key
Assert.AreEqual(1ul, btree.LoadNode(btree.Root.ChildNodes[0]).Keys[0].Key);
Assert.AreEqual(1, btree.LoadNode(btree.Root.ChildNodes[0]).Keys.Count);
// middle child has 1 keys
Assert.AreEqual(1, btree.LoadNode(btree.Root.ChildNodes[1]).Keys.Count);
Assert.AreEqual(3ul, btree.LoadNode(btree.Root.ChildNodes[1]).Keys[0].Key);
// right child has 1 keys
Assert.AreEqual(1, btree.LoadNode(btree.Root.ChildNodes[2]).Keys.Count);
Assert.AreEqual(5ul, btree.LoadNode(btree.Root.ChildNodes[2]).Keys[0].Key);
// check in order traversal
var inorderKeys = InOrderTraversal(btree);
Assert.AreEqual(1ul, inorderKeys.First().Key);
Assert.AreEqual(5ul, inorderKeys.Last().Key);
}
public void TestRootSplit()
{
var store = new Store();
var btree = new PersistentBTree <IntData>(store.GetNextObjectId(), 3, store);
btree.Insert(1, null);
btree.Insert(2, null);
btree.Insert(3, null);
AssertOrderInList(InOrderTraversal <IntData>(btree));
Assert.IsNotNull(btree.Root);
Assert.AreEqual(1, btree.Root.Keys.Count);
Assert.AreEqual(2ul, btree.Root.Keys[0].Key);
Assert.AreEqual(2, btree.Root.ChildNodes.Count);
Assert.AreEqual(1ul, btree.LoadNode(btree.Root.ChildNodes[0]).Keys[0].Key);
Assert.AreEqual(3ul, btree.LoadNode(btree.Root.ChildNodes[1]).Keys[0].Key);
}
public void TestNonSequentialInsert()
{
var store = new Store();
var btree = new PersistentBTree <IntData>(store.GetNextObjectId(), 3, store);
btree.Insert(3, null);
btree.Insert(10, null);
btree.Insert(2, null);
btree.Insert(7, null);
btree.Insert(5, null);
btree.Insert(4, null);
btree.Insert(1, null);
// check in order traversal
var inorderKeys = InOrderTraversal(btree);
Assert.AreEqual(1ul, inorderKeys.First().Key);
Assert.AreEqual(10ul, inorderKeys.Last().Key);
AssertOrderInList(inorderKeys);
}
public void TestDeleteInLeafWithRightSiblingBorrow()
{
var store = new Store();
var btree = new PersistentBTree <IntData>(store.GetNextObjectId(), 3, store);
btree.Insert(1, null);
btree.Insert(2, null);
btree.Insert(3, null);
btree.Insert(4, null);
Assert.IsNotNull(btree.Lookup(1));
btree.Delete(1);
Assert.IsNull(btree.Lookup(1));
AssertOrderInList(InOrderTraversal(btree));
Assert.AreEqual(3ul, btree.Root.Keys[0].Key);
Assert.AreEqual(2ul, btree.LoadNode(btree.Root.ChildNodes[0]).Keys[0].Key);
Assert.AreEqual(4ul, btree.LoadNode(btree.Root.ChildNodes[1]).Keys[0].Key);
}
public void TestEntryLookup()
{
var store = new Store();
var btree = new PersistentBTree <IntData>(store.GetNextObjectId(), 3, store);
btree.Insert(1, null);
btree.Insert(2, null);
btree.Insert(3, null);
btree.Insert(4, null);
Assert.IsNotNull(btree.Root);
Assert.AreEqual(1, btree.Root.Keys.Count);
Assert.AreEqual(2ul, btree.Root.Keys[0].Key);
Entry <IntData> entry = null;
Node <IntData> node = null;
btree.LookupEntry(3, out entry, out node);
Assert.IsNotNull(entry);
Assert.IsNotNull(node);
}
/// <summary>
/// Create a new resource id index.
/// </summary>
public ResourceIdIndex(Store store, PersistentBTree<Bucket> index)
{
_store = store;
_index = index;
_resourceIdCache = new Dictionary<string, ulong>();
}
