public void TestMethod3()
{
Node root = new Node(node_type.inner, new List<int>() { 16 });
Node child1 = new Node(node_type.inner, new List<int>() { 7, 13 });
Node child2 = new Node(node_type.inner, new List<int>() { 20, 24 });
Node child3 = new Node(node_type.leaf, new List<int>() { 1, 2, 3, 4, 5 });
Node child4 = new Node(node_type.leaf, new List<int>() { 10, 11, 12 });
Node child5 = new Node(node_type.leaf, new List<int>() { 14, 15 });
Node child6 = new Node(node_type.leaf, new List<int>() { 17, 18, 19 });
Node child7 = new Node(node_type.leaf, new List<int>() { 21, 22 });
Node child8 = new Node(node_type.leaf, new List<int>() { 25, 26 });
root.AddChild(child1);
root.AddChild(child2);
child1.AddChild(child3);
child1.AddChild(child4);
child1.AddChild(child5);
child2.AddChild(child6);
child2.AddChild(child7);
child2.AddChild(child8);
BTree tree = new BTree(root, 3);
bool flag = BTree.Check(tree);
Assert.AreEqual(true, flag);
}
public void TestMethod2()
{
Node root = new Node(node_type.inner, new List<int>() { 7, 13, 20, 30 });
Node child1 = new Node(node_type.leaf, new List<int>() { 1, 3, 4, 5 });
Node child2 = new Node(node_type.leaf, new List<int>() { 10, 11 });
Node child3 = new Node(node_type.leaf, new List<int>() { 14, 15 });
Node child4 = new Node(node_type.leaf, new List<int>() { 19, 20, 21 });
Node child5 = new Node(node_type.leaf, new List<int>() { 31, 32 });
root.AddChild(child1);
root.AddChild(child2);
root.AddChild(child3);
root.AddChild(child4);
root.AddChild(child5);
BTree tree = new BTree(root, 3);
bool flag = BTree.Check(tree);
Assert.AreEqual(false, flag);
}
public void TestMethod4()
{
Node root = new Node(node_type.inner, new List<int>() { 20, 22, 35 });
Node child1 = new Node(node_type.leaf, new List<int>() { 5, 7, 10, 15 });
Node child2 = new Node(node_type.leaf, new List<int>() { 23, 24 });
Node child3 = new Node(node_type.leaf, new List<int>() { 27, 29, 30 });
Node child4 = new Node(node_type.leaf, new List<int>() { 36, 38 });
root.AddChild(child1);
root.AddChild(child2);
root.AddChild(child3);
root.AddChild(child4);
BTree tree = new BTree(root, 3);
bool flag = BTree.Check(tree);
Assert.AreEqual(false, flag);
}
public void TestMethod9()
{
Node root = new Node(node_type.inner, new List<int>() { 22 });
Node child1 = new Node(node_type.leaf, new List<int>() { 10 });
root.AddChild(child1);
BTree tree = new BTree(root, 2);
bool flag = BTree.Check(tree);
Assert.AreEqual(false, flag);
}
public void TestMethod6()
{
Node root = new Node(node_type.inner, new List<int>() { 25 });
Node child1 = new Node(node_type.inner, new List<int>() { 10, 16 });
Node child2 = new Node(node_type.inner, new List<int>() { 26 });
Node child3 = new Node(node_type.leaf, new List<int>() { 4, 6, 8 });
Node child4 = new Node(node_type.leaf, new List<int>() { 12, 14 });
Node child5 = new Node(node_type.leaf, new List<int>() { 18, 20 });
Node child6 = new Node(node_type.leaf, new List<int>() { 24 });
Node child7 = new Node(node_type.leaf, new List<int>() { 28, 30 });
root.AddChild(child1);
root.AddChild(child2);
child1.AddChild(child3);
child1.AddChild(child4);
child1.AddChild(child5);
child2.AddChild(child6);
child2.AddChild(child7);
BTree tree = new BTree(root, 2);
bool flag = BTree.Check(tree);
Assert.AreEqual(false, flag);
}
/// <summary>
/// Проверка корня на:
/// 1. Упорядоченность элементов по возрастанию
/// 2. Для каждого элемента корня: левый сосед меньше, правый - больше
/// </summary>
/// <param name="tree"> б-дерево </param>
/// <returns> результат проверки </returns>
public static bool RootTest(BTree tree)
{
int rootCount = tree.root.values.Count;
int childrenCount = tree.root.children.Count;
if (!(rootCount + 1 == childrenCount))
return false;
if (rootCount == 1)//если корень сосотоит из одного элемента, то всегда два потомка
{
if (tree.root.children[0].values[0] > tree.root.values[0])
return false;
if (tree.root.children[1].values[0] < tree.root.values[0])
return false;
}
for (int i = 0; i < rootCount - 1; i++)
{
if (tree.root.values[i] > tree.root.values[i + 1])
return false;
if (tree.root.values[i] < tree.root.children[i].values[0])
return false;
if (tree.root.values[i] > tree.root.children[i + 1].values[0])
return false;
}
int rootValue = tree.root.values[rootCount - 1];
if (rootValue < tree.root.children[rootCount - 1].values[0])
return false;
if (rootValue > tree.root.children[rootCount].values[0])
return false;
return true;
}