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btree_test.go
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btree_test.go
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package main
import (
"github.com/stretchr/testify/require"
"strconv"
"testing"
"github.com/stretchr/testify/assert"
)
const minItems = 2
const mockNumberOfElements = 10
func (n *Node) addChildNode(child *Node) *Node {
child.bucket = n.bucket
n.childNodes = append(n.childNodes, child)
return n
}
func areTreesEqual(t *testing.T, t1, t2 *Tree) {
areTreesEqualHelper(t, t1.root, t2.root)
}
func areNodesEqual(t *testing.T, n1, n2 *Node) {
for i := 0; i < len(n1.items); i++ {
assert.Equal(t, n1.items[i].key, n2.items[i].key)
assert.Equal(t, n1.items[i].value, n2.items[i].value)
}
}
func areTreesEqualHelper(t *testing.T, n1, n2 *Node) {
require.Equal(t, len(n1.items), len(n2.items))
require.Equal(t, len(n1.childNodes), len(n2.childNodes))
areNodesEqual(t, n1, n2)
// Exit condition: child node -> len(n1.childNodes) == 0
for i := 0; i < len(n1.childNodes); i++ {
areTreesEqualHelper(t, n1.childNodes[i], n2.childNodes[i])
}
}
func createTestMockTree() *Tree {
root := NewEmptyNode()
root.addItems("2", "5")
child0 := NewEmptyNode()
child0.addItems("0", "1")
root.addChildNode(child0)
child1 := NewEmptyNode()
child1.addItems("3", "4")
root.addChildNode(child1)
child2 := NewEmptyNode()
child2.addItems("6", "7", "8", "9")
root.addChildNode(child2)
return newTreeWithRoot(root, minItems)
}
func (n *Node) addItems(keys ...string) *Node {
for _, key := range keys {
n.items = append(n.items, newItem(key, key))
}
return n
}
func Test_BucketAddSingle(t *testing.T) {
bucket := NewTree(minItems)
value := "0"
bucket.Put(value, value)
root := NewEmptyNode()
root.addItems("0")
expectedbucket := &Tree{root: root}
areTreesEqual(t, expectedbucket, bucket)
}
func Test_BucketRemoveFromRootSingleElement(t *testing.T) {
bucket := NewTree(minItems)
value := "0"
id := "0"
bucket.Put(id, value)
// Tree is balanced
root := NewEmptyNode()
root.addItems("0")
expectedbucket := newTreeWithRoot(root, minItems)
areTreesEqual(t, expectedbucket, bucket)
bucket.Remove(id)
expectedbucketAfterRemoval := NewTree(minItems)
areTreesEqual(t, expectedbucketAfterRemoval, bucket)
}
func Test_BucketAddMultiple(t *testing.T) {
bucket := NewTree(minItems)
numOfElements := mockNumberOfElements
for i := 0; i < numOfElements; i++ {
istr := strconv.Itoa(i)
bucket.Put(istr, istr)
}
// Tree is balanced
areTreesEqual(t, createTestMockTree(), bucket)
}
func Test_BucketAddAndRebalanceSplit(t *testing.T) {
root := NewEmptyNode()
root.addItems("4")
bucket := newTreeWithRoot(root, minItems)
child0 := NewEmptyNode()
child0.addItems("0", "1", "2", "3")
root.addChildNode(child0)
child1 := NewEmptyNode()
child1.addItems("5", "6", "7", "8")
root.addChildNode(child1)
bucket.Put("9","9")
expectedroot := NewEmptyNode()
expectedroot.addItems("4", "7")
expectedbucket := newTreeWithRoot(expectedroot, minItems)
expectedchild0 := NewEmptyNode()
expectedchild0.addItems("0", "1", "2", "3")
expectedroot.addChildNode(expectedchild0)
expectedchild1 := NewEmptyNode()
expectedchild1.addItems("5", "6")
expectedroot.addChildNode(expectedchild1)
expectedchild2 := NewEmptyNode()
expectedchild2.addItems("8", "9")
expectedroot.addChildNode(expectedchild2)
// Tree is balanced
areTreesEqual(t, expectedbucket, bucket)
}
func Test_BucketSplitAndMerge(t *testing.T) {
root := NewEmptyNode()
root.addItems("4")
bucket := newTreeWithRoot(root, minItems)
child0 := NewEmptyNode()
child0.addItems("0", "1", "2", "3")
root.addChildNode(child0)
child1 := NewEmptyNode()
child1.addItems("5", "6", "7", "8")
root.addChildNode(child1)
bucket.Put("9", "9")
expectedroot := NewEmptyNode()
expectedroot.addItems("4", "7")
expectedbucket := newTreeWithRoot(expectedroot, minItems)
expectedchild0 := NewEmptyNode()
expectedchild0.addItems("0", "1", "2", "3")
expectedroot.addChildNode(expectedchild0)
expectedchild1 := NewEmptyNode()
expectedchild1.addItems("5", "6")
expectedroot.addChildNode(expectedchild1)
expectedchild2 := NewEmptyNode()
expectedchild2.addItems("8", "9")
expectedroot.addChildNode(expectedchild2)
// Tree is balanced
areTreesEqual(t, expectedbucket, bucket)
bucket.Remove("9")
expectedroot = NewEmptyNode()
expectedroot.addItems("4")
expectedbucket = newTreeWithRoot(expectedroot, minItems)
expectedchild0 = NewEmptyNode()
expectedchild0.addItems("0", "1", "2", "3")
expectedroot.addChildNode(expectedchild0)
expectedchild1 = NewEmptyNode()
expectedchild1.addItems("5", "6", "7", "8")
expectedroot.addChildNode(expectedchild1)
areTreesEqual(t, expectedbucket, bucket)
}
func Test_BucketRemoveFromRootWithoutRebalance(t *testing.T) {
bucket := NewTree(minItems)
for i := 0; i < mockNumberOfElements; i++ {
istr := strconv.Itoa(i)
bucket.Put(istr, istr)
}
// Tree is balanced
areTreesEqual(t, createTestMockTree(), bucket)
expectedroot := NewEmptyNode()
expectedroot.addItems("2", "5")
expectedTree := newTreeWithRoot(expectedroot, minItems)
child0 := NewEmptyNode()
child0.addItems("0", "1")
expectedroot.addChildNode(child0)
child1 := NewEmptyNode()
child1.addItems("3", "4")
expectedroot.addChildNode(child1)
child2 := NewEmptyNode()
child2.addItems("6", "8", "9")
expectedroot.addChildNode(child2)
// Remove an element
bucket.Remove("7")
areTreesEqual(t, expectedTree, bucket)
}
func Test_BucketRemoveFromRootAndRotateLeft(t *testing.T) {
mockRoot := NewEmptyNode()
mockRoot.addItems("2", "5")
mockTree := newTreeWithRoot(mockRoot, minItems)
mockChild0 := NewEmptyNode()
mockChild0.addItems("0", "1")
mockRoot.addChildNode(mockChild0)
mockChild1 := NewEmptyNode()
mockChild1.addItems("3", "4")
mockRoot.addChildNode(mockChild1)
mockChild2 := NewEmptyNode()
mockChild2.addItems("6", "7", "8")
mockRoot.addChildNode(mockChild2)
expectedRoot := NewEmptyNode()
expectedRoot.addItems("2", "6")
expectedTree := newTreeWithRoot(expectedRoot, minItems)
expectedChild0 := NewEmptyNode()
expectedChild0.addItems("0", "1")
expectedRoot.addChildNode(expectedChild0)
expectedChild1 := NewEmptyNode()
expectedChild1.addItems("3", "4")
expectedRoot.addChildNode(expectedChild1)
expectedChild2 := NewEmptyNode()
expectedChild2.addItems("7", "8")
expectedRoot.addChildNode(expectedChild2)
// Remove an element
mockTree.Remove("5")
areTreesEqual(t, expectedTree, mockTree)
}
func Test_BucketRemoveFromRootAndRotateRight(t *testing.T) {
mockRoot := NewEmptyNode()
mockRoot.addItems("3", "6")
mockTree := newTreeWithRoot(mockRoot, minItems)
mockChild0 := NewEmptyNode()
mockChild0.addItems("0", "1", "2")
mockRoot.addChildNode(mockChild0)
mockChild1 := NewEmptyNode()
mockChild1.addItems("4", "5")
mockRoot.addChildNode(mockChild1)
mockChild2 := NewEmptyNode()
mockChild2.addItems("7", "8")
mockRoot.addChildNode(mockChild2)
expectedRoot := NewEmptyNode()
expectedRoot.addItems("2", "5")
expectedTree := newTreeWithRoot(expectedRoot, minItems)
expectedChild0 := NewEmptyNode()
expectedChild0.addItems("0", "1")
expectedRoot.addChildNode(expectedChild0)
expectedChild1 := NewEmptyNode()
expectedChild1.addItems("3", "4")
expectedRoot.addChildNode(expectedChild1)
expectedChild2 := NewEmptyNode()
expectedChild2.addItems("7", "8")
expectedRoot.addChildNode(expectedChild2)
// Remove an element
mockTree.Remove("6")
areTreesEqual(t, expectedTree, mockTree)
}
// Test_BucketRemoveFromRootAndRebalanceMergeToUnbalanced tests when the unbalanced node is the most left one so the
// merge has to happen from the right node into the unbalanced node
func Test_BucketRemoveFromRootAndRebalanceMergeToUnbalanced(t *testing.T) {
mockRoot := NewEmptyNode()
mockRoot.addItems("2", "5")
mockTree := newTreeWithRoot(mockRoot, minItems)
mockChild0 := NewEmptyNode()
mockChild0.addItems("0", "1")
mockRoot.addChildNode(mockChild0)
mockChild1 := NewEmptyNode()
mockChild1.addItems("3", "4")
mockRoot.addChildNode(mockChild1)
mockChild2 := NewEmptyNode()
mockChild2.addItems("6", "7")
mockRoot.addChildNode(mockChild2)
expectedRoot := NewEmptyNode()
expectedRoot.addItems("5")
expectedTree := newTreeWithRoot(expectedRoot, minItems)
expectedChild0 := NewEmptyNode()
expectedChild0.addItems("0", "1", "3", "4")
expectedRoot.addChildNode(expectedChild0)
expectedChild1 := NewEmptyNode()
expectedChild1.addItems("6", "7")
expectedRoot.addChildNode(expectedChild1)
// Remove an element
mockTree.Remove("2")
areTreesEqual(t, expectedTree, mockTree)
}
// Test_BucketRemoveFromRootAndRebalanceMergeFromUnbalanced tests when the unbalanced node is not the most left one so the
// merge has to happen from the unbalanced node to the node left to it
func Test_BucketRemoveFromRootAndRebalanceMergeFromUnbalanced(t *testing.T) {
mockRoot := NewEmptyNode()
mockRoot.addItems("2", "5")
mockTree := newTreeWithRoot(mockRoot, minItems)
mockChild0 := NewEmptyNode()
mockChild0.addItems("0", "1")
mockRoot.addChildNode(mockChild0)
mockChild1 := NewEmptyNode()
mockChild1.addItems("3", "4")
mockRoot.addChildNode(mockChild1)
mockChild2 := NewEmptyNode()
mockChild2.addItems("6", "7")
mockRoot.addChildNode(mockChild2)
expectedRoot := NewEmptyNode()
expectedRoot.addItems("4")
expectedTree := newTreeWithRoot(expectedRoot, minItems)
expectedChild0 := NewEmptyNode()
expectedChild0.addItems("0", "1", "2", "3")
expectedRoot.addChildNode(expectedChild0)
expectedChild1 := NewEmptyNode()
expectedChild1.addItems("6", "7")
expectedRoot.addChildNode(expectedChild1)
// Remove an element
mockTree.Remove("5")
areTreesEqual(t, expectedTree, mockTree)
}
func Test_BucketRemoveFromInnerNodeAndRotateLeft(t *testing.T) {
mockRoot := NewEmptyNode()
mockRoot.addItems("8")
mockTree := newTreeWithRoot(mockRoot, minItems)
mockChild0 := NewEmptyNode()
mockChild0.addItems("2", "5")
mockRoot.addChildNode(mockChild0)
mockChild00 := NewEmptyNode()
mockChild00.addItems("0", "1")
mockChild0.addChildNode(mockChild00)
mockChild01 := NewEmptyNode()
mockChild01.addItems("3", "4")
mockChild0.addChildNode(mockChild01)
mockChild02 := NewEmptyNode()
mockChild02.addItems("6", "7")
mockChild0.addChildNode(mockChild02)
mockChild1 := NewEmptyNode()
mockChild1.addItems("b", "e", "h")
mockRoot.addChildNode(mockChild1)
mockChild10 := NewEmptyNode()
mockChild10.addItems("9", "a")
mockChild1.addChildNode(mockChild10)
mockChild11 := NewEmptyNode()
mockChild11.addItems("c", "d")
mockChild1.addChildNode(mockChild11)
mockChild12 := NewEmptyNode()
mockChild12.addItems("f", "g")
mockChild1.addChildNode(mockChild12)
mockChild13 := NewEmptyNode()
mockChild13.addItems("i", "j")
mockChild1.addChildNode(mockChild13)
expectedRoot := NewEmptyNode()
expectedRoot.addItems("b")
expectedTree := newTreeWithRoot(expectedRoot, minItems)
expectedChild0 := NewEmptyNode()
expectedChild0.addItems("4", "8")
expectedRoot.addChildNode(expectedChild0)
expectedChild00 := NewEmptyNode()
expectedChild00.addItems("0", "1", "2", "3")
expectedChild0.addChildNode(expectedChild00)
expectedChild01 := NewEmptyNode()
expectedChild01.addItems("6", "7")
expectedChild0.addChildNode(expectedChild01)
expectedChild02 := NewEmptyNode()
expectedChild02.addItems("9", "a")
expectedChild0.addChildNode(expectedChild02)
expectedChild1 := NewEmptyNode()
expectedChild1.addItems("e", "h")
expectedRoot.addChildNode(expectedChild1)
expectedChild10 := NewEmptyNode()
expectedChild10.addItems("c", "d")
expectedChild1.addChildNode(expectedChild10)
expectedChild11 := NewEmptyNode()
expectedChild11.addItems("f", "g")
expectedChild1.addChildNode(expectedChild11)
expectedChild12 := NewEmptyNode()
expectedChild12.addItems("i", "j")
expectedChild1.addChildNode(expectedChild12)
// Remove an element
mockTree.Remove("5")
areTreesEqual(t, expectedTree, mockTree)
}
func Test_BucketRemoveFromInnerNodeAndRotateRight(t *testing.T) {
mockRoot := NewEmptyNode()
mockRoot.addItems("b")
mockTree := newTreeWithRoot(mockRoot, minItems)
mockChild0 := NewEmptyNode()
mockChild0.addItems("2", "5", "8")
mockRoot.addChildNode(mockChild0)
mockChild00 := NewEmptyNode()
mockChild00.addItems("0", "1")
mockChild0.addChildNode(mockChild00)
mockChild01 := NewEmptyNode()
mockChild01.addItems("3", "4")
mockChild0.addChildNode(mockChild01)
mockChild02 := NewEmptyNode()
mockChild02.addItems("6", "7")
mockChild0.addChildNode(mockChild02)
mockChild03 := NewEmptyNode()
mockChild03.addItems("9", "a")
mockChild0.addChildNode(mockChild03)
mockChild1 := NewEmptyNode()
mockChild1.addItems("e", "h")
mockRoot.addChildNode(mockChild1)
mockChild10 := NewEmptyNode()
mockChild10.addItems("c", "d")
mockChild1.addChildNode(mockChild10)
mockChild11 := NewEmptyNode()
mockChild11.addItems("f", "g")
mockChild1.addChildNode(mockChild11)
mockChild12 := NewEmptyNode()
mockChild12.addItems("i", "j")
mockChild1.addChildNode(mockChild12)
expectedRoot := NewEmptyNode()
expectedRoot.addItems("8")
expectedTree := newTreeWithRoot(expectedRoot, minItems)
expectedChild0 := NewEmptyNode()
expectedChild0.addItems("2", "5")
expectedRoot.addChildNode(expectedChild0)
expectedChild00 := NewEmptyNode()
expectedChild00.addItems("0", "1")
expectedChild0.addChildNode(expectedChild00)
expectedChild01 := NewEmptyNode()
expectedChild01.addItems("3", "4")
expectedChild0.addChildNode(expectedChild01)
expectedChild02 := NewEmptyNode()
expectedChild02.addItems("6", "7")
expectedChild0.addChildNode(expectedChild02)
expectedChild1 := NewEmptyNode()
expectedChild1.addItems("b", "h")
expectedRoot.addChildNode(expectedChild1)
expectedChild10 := NewEmptyNode()
expectedChild10.addItems("9", "a")
expectedChild1.addChildNode(expectedChild10)
expectedChild11 := NewEmptyNode()
expectedChild11.addItems("c", "d", "f", "g")
expectedChild1.addChildNode(expectedChild11)
expectedChild12 := NewEmptyNode()
expectedChild12.addItems("i", "j")
expectedChild1.addChildNode(expectedChild12)
// Remove an element
mockTree.Remove("e")
areTreesEqual(t, expectedTree, mockTree)
}
func Test_BucketRemoveFromInnerNodeAndUnion(t *testing.T) {
mockRoot := NewEmptyNode()
mockRoot.addItems("8")
mockTree := newTreeWithRoot(mockRoot, minItems)
mockChild0 := NewEmptyNode()
mockChild0.addItems("2", "5")
mockRoot.addChildNode(mockChild0)
mockChild00 := NewEmptyNode()
mockChild00.addItems("0", "1")
mockChild0.addChildNode(mockChild00)
mockChild01 := NewEmptyNode()
mockChild01.addItems("3", "4")
mockChild0.addChildNode(mockChild01)
mockChild02 := NewEmptyNode()
mockChild02.addItems("6", "7")
mockChild0.addChildNode(mockChild02)
mockChild1 := NewEmptyNode()
mockChild1.addItems("b", "e")
mockRoot.addChildNode(mockChild1)
mockChild10 := NewEmptyNode()
mockChild10.addItems("9", "a")
mockChild1.addChildNode(mockChild10)
mockChild11 := NewEmptyNode()
mockChild11.addItems("c", "d")
mockChild1.addChildNode(mockChild11)
mockChild12 := NewEmptyNode()
mockChild12.addItems("f", "g")
mockChild1.addChildNode(mockChild12)
expectedRoot := NewEmptyNode()
expectedRoot.addItems("5", "8", "b", "e")
expectedTree := newTreeWithRoot(expectedRoot, minItems)
expectedChild0 := NewEmptyNode()
expectedChild0.addItems("0", "1", "3", "4")
expectedRoot.addChildNode(expectedChild0)
expectedChild1 := NewEmptyNode()
expectedChild1.addItems("6", "7")
expectedRoot.addChildNode(expectedChild1)
expectedChild2 := NewEmptyNode()
expectedChild2.addItems("9", "a")
expectedRoot.addChildNode(expectedChild2)
expectedChild3 := NewEmptyNode()
expectedChild3.addItems("c", "d")
expectedRoot.addChildNode(expectedChild3)
expectedChild4 := NewEmptyNode()
expectedChild4.addItems("f", "g")
expectedRoot.addChildNode(expectedChild4)
// Remove an element
mockTree.Remove("2")
areTreesEqual(t, expectedTree, mockTree)
}
func Test_BucketRemoveFromLeafAndRotateLeft(t *testing.T) {
mockRoot := NewEmptyNode()
mockRoot.addItems("9")
mockTree := newTreeWithRoot(mockRoot, minItems)
mockChild0 := NewEmptyNode()
mockChild0.addItems("2", "6")
mockRoot.addChildNode(mockChild0)
mockChild00 := NewEmptyNode()
mockChild00.addItems("0", "1")
mockChild0.addChildNode(mockChild00)
mockChild01 := NewEmptyNode()
mockChild01.addItems("3", "4", "5")
mockChild0.addChildNode(mockChild01)
mockChild02 := NewEmptyNode()
mockChild02.addItems("7", "8")
mockChild0.addChildNode(mockChild02)
mockChild1 := NewEmptyNode()
mockChild1.addItems("c", "f")
mockRoot.addChildNode(mockChild1)
mockChild10 := NewEmptyNode()
mockChild10.addItems("a", "b")
mockChild1.addChildNode(mockChild10)
mockChild11 := NewEmptyNode()
mockChild11.addItems("d", "e")
mockChild1.addChildNode(mockChild11)
mockChild12 := NewEmptyNode()
mockChild12.addItems("g", "h")
mockChild1.addChildNode(mockChild12)
expectedRoot := NewEmptyNode()
expectedRoot.addItems("9")
expectedTree := newTreeWithRoot(expectedRoot, minItems)
expectedChild0 := NewEmptyNode()
expectedChild0.addItems("3", "6")
expectedRoot.addChildNode(expectedChild0)
expectedChild00 := NewEmptyNode()
expectedChild00.addItems("0", "2")
expectedChild0.addChildNode(expectedChild00)
expectedChild01 := NewEmptyNode()
expectedChild01.addItems("4", "5")
expectedChild0.addChildNode(expectedChild01)
expectedChild02 := NewEmptyNode()
expectedChild02.addItems("7", "8")
expectedChild0.addChildNode(expectedChild02)
expectedChild1 := NewEmptyNode()
expectedChild1.addItems("c", "f")
expectedRoot.addChildNode(expectedChild1)
expectedChild10 := NewEmptyNode()
expectedChild10.addItems("a", "b")
expectedChild1.addChildNode(expectedChild10)
expectedChild11 := NewEmptyNode()
expectedChild11.addItems("d", "e")
expectedChild1.addChildNode(expectedChild11)
expectedChild12 := NewEmptyNode()
expectedChild12.addItems("g", "h")
expectedChild1.addChildNode(expectedChild12)
// Remove an element
mockTree.Remove("1")
areTreesEqual(t, expectedTree, mockTree)
}
func Test_BucketRemoveFromLeafAndRotateRight(t *testing.T) {
mockRoot := NewEmptyNode()
mockRoot.addItems("9")
mockTree := newTreeWithRoot(mockRoot, minItems)
mockChild0 := NewEmptyNode()
mockChild0.addItems("2", "6")
mockRoot.addChildNode(mockChild0)
mockChild00 := NewEmptyNode()
mockChild00.addItems("0", "1")
mockChild0.addChildNode(mockChild00)
mockChild01 := NewEmptyNode()
mockChild01.addItems("3", "4", "5")
mockChild0.addChildNode(mockChild01)
mockChild02 := NewEmptyNode()
mockChild02.addItems("7", "8")
mockChild0.addChildNode(mockChild02)
mockChild1 := NewEmptyNode()
mockChild1.addItems("c", "f")
mockRoot.addChildNode(mockChild1)
mockChild10 := NewEmptyNode()
mockChild10.addItems("a", "b")
mockChild1.addChildNode(mockChild10)
mockChild11 := NewEmptyNode()
mockChild11.addItems("d", "e")
mockChild1.addChildNode(mockChild11)
mockChild12 := NewEmptyNode()
mockChild12.addItems("g", "h")
mockChild1.addChildNode(mockChild12)
expectedRoot := NewEmptyNode()
expectedRoot.addItems("9")
expectedTree := newTreeWithRoot(expectedRoot, minItems)
expectedChild0 := NewEmptyNode()
expectedChild0.addItems("2", "5")
expectedRoot.addChildNode(expectedChild0)
expectedChild00 := NewEmptyNode()
expectedChild00.addItems("0", "1")
expectedChild0.addChildNode(expectedChild00)
expectedChild01 := NewEmptyNode()
expectedChild01.addItems("3", "4")
expectedChild0.addChildNode(expectedChild01)
expectedChild02 := NewEmptyNode()
expectedChild02.addItems("6", "7")
expectedChild0.addChildNode(expectedChild02)
expectedChild1 := NewEmptyNode()
expectedChild1.addItems("c", "f")
expectedRoot.addChildNode(expectedChild1)
expectedChild10 := NewEmptyNode()
expectedChild10.addItems("a", "b")
expectedChild1.addChildNode(expectedChild10)
expectedChild11 := NewEmptyNode()
expectedChild11.addItems("d", "e")
expectedChild1.addChildNode(expectedChild11)
expectedChild12 := NewEmptyNode()
expectedChild12.addItems("g", "h")
expectedChild1.addChildNode(expectedChild12)
// Remove an element
mockTree.Remove("8")
areTreesEqual(t, expectedTree, mockTree)
}
func Test_BucketRemoveFromLeafAndUnion(t *testing.T) {
mockRoot := NewEmptyNode()
mockRoot.addItems("8")
mockTree := newTreeWithRoot(mockRoot, minItems)
mockChild0 := NewEmptyNode()
mockChild0.addItems("2", "5")
mockRoot.addChildNode(mockChild0)
mockChild00 := NewEmptyNode()
mockChild00.addItems("0", "1")
mockChild0.addChildNode(mockChild00)
mockChild01 := NewEmptyNode()
mockChild01.addItems("3", "4")
mockChild0.addChildNode(mockChild01)
mockChild02 := NewEmptyNode()
mockChild02.addItems("6", "7")
mockChild0.addChildNode(mockChild02)
mockChild1 := NewEmptyNode()
mockChild1.addItems("b", "e")
mockRoot.addChildNode(mockChild1)
mockChild10 := NewEmptyNode()
mockChild10.addItems("9", "a")
mockChild1.addChildNode(mockChild10)
mockChild11 := NewEmptyNode()
mockChild11.addItems("c", "d")
mockChild1.addChildNode(mockChild11)
mockChild12 := NewEmptyNode()
mockChild12.addItems("f", "g")
mockChild1.addChildNode(mockChild12)
expectedRoot := NewEmptyNode()
expectedRoot.addItems("5", "8", "b", "e")
expectedTree := newTreeWithRoot(expectedRoot, minItems)
expectedChild00 := NewEmptyNode()
expectedChild00.addItems("1", "2", "3", "4")
expectedRoot.addChildNode(expectedChild00)
expectedChild01 := NewEmptyNode()
expectedChild01.addItems("6", "7")
expectedRoot.addChildNode(expectedChild01)
expectedChild02 := NewEmptyNode()
expectedChild02.addItems("9", "a")
expectedRoot.addChildNode(expectedChild02)
expectedChild03 := NewEmptyNode()
expectedChild03.addItems("c", "d")
expectedRoot.addChildNode(expectedChild03)
expectedChild04 := NewEmptyNode()
expectedChild04.addItems("f", "g")
expectedRoot.addChildNode(expectedChild04)
// Remove an element
mockTree.Remove("0")
areTreesEqual(t, expectedTree, mockTree)
}
func Test_BucketFindNode(t *testing.T) {
mockRoot := NewEmptyNode()
mockRoot.addItems("8")
mockTree := newTreeWithRoot(mockRoot, minItems)
mockChild0 := NewEmptyNode()
mockChild0.addItems("2", "5")
mockRoot.addChildNode(mockChild0)
mockChild00 := NewEmptyNode()
mockChild00.addItems("0", "1")
mockChild0.addChildNode(mockChild00)
mockChild01 := NewEmptyNode()
mockChild01.addItems("3", "4")
mockChild0.addChildNode(mockChild01)
mockChild02 := NewEmptyNode()
mockChild02.addItems("6", "7")
mockChild0.addChildNode(mockChild02)
mockChild1 := NewEmptyNode()
mockChild1.addItems("b", "e")
mockRoot.addChildNode(mockChild1)
mockChild10 := NewEmptyNode()
mockChild10.addItems("9", "a")
mockChild1.addChildNode(mockChild10)
mockChild11 := NewEmptyNode()
mockChild11.addItems("c", "d")
mockChild1.addChildNode(mockChild11)
mockChild12 := NewEmptyNode()
mockChild12.addItems("f", "g")
mockChild1.addChildNode(mockChild12)
// Item found
expectedItem := newItem("c", "c")
item := mockTree.Find("c")
assert.Equal(t, expectedItem, item)
// Item not found
expectedItem = nil
item = mockTree.Find("h")
assert.Equal(t, expectedItem, item)
}
func Test_BucketUpdateNode(t *testing.T) {
mockRoot := NewEmptyNode()
mockRoot.addItems("8")
mockTree := newTreeWithRoot(mockRoot, minItems)
mockChild0 := NewEmptyNode()
mockChild0.addItems("2", "5")
mockRoot.addChildNode(mockChild0)
mockChild00 := NewEmptyNode()
mockChild00.addItems("0", "1")
mockChild0.addChildNode(mockChild00)
mockChild01 := NewEmptyNode()
mockChild01.addItems("3", "4")
mockChild0.addChildNode(mockChild01)
mockChild02 := NewEmptyNode()
mockChild02.addItems("6", "7")
mockChild0.addChildNode(mockChild02)
mockChild1 := NewEmptyNode()
mockChild1.addItems("b", "e")
mockRoot.addChildNode(mockChild1)
mockChild10 := NewEmptyNode()
mockChild10.addItems("9", "a")
mockChild1.addChildNode(mockChild10)
mockChild11 := NewEmptyNode()
mockChild11.addItems("c", "d")
mockChild1.addChildNode(mockChild11)
mockChild12 := NewEmptyNode()
mockChild12.addItems("f", "g")
mockChild1.addChildNode(mockChild12)
// Item found
expectedItem := newItem("c", "c")
item := mockTree.Find("c")
assert.Equal(t, expectedItem, item)
// Item updated successfully
newvalue := "f"
mockTree.Put("c",newvalue)
item = mockTree.Find("c")
assert.Equal(t, newvalue, item.value)
}