gods/trees/avltree/avltree_test.go
2017-03-06 04:18:23 +01:00

742 lines
18 KiB
Go

// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package avltree
import (
"fmt"
"testing"
)
func TestAVLTreePut(t *testing.T) {
tree := NewWithIntComparator()
tree.Put(5, "e")
tree.Put(6, "f")
tree.Put(7, "g")
tree.Put(3, "c")
tree.Put(4, "d")
tree.Put(1, "x")
tree.Put(2, "b")
tree.Put(1, "a") //overwrite
if actualValue := tree.Size(); actualValue != 7 {
t.Errorf("Got %v expected %v", actualValue, 7)
}
if actualValue, expectedValue := fmt.Sprintf("%d%d%d%d%d%d%d", tree.Keys()...), "1234567"; actualValue != expectedValue {
t.Errorf("Got %v expected %v", actualValue, expectedValue)
}
if actualValue, expectedValue := fmt.Sprintf("%s%s%s%s%s%s%s", tree.Values()...), "abcdefg"; actualValue != expectedValue {
t.Errorf("Got %v expected %v", actualValue, expectedValue)
}
tests1 := [][]interface{}{
{1, "a", true},
{2, "b", true},
{3, "c", true},
{4, "d", true},
{5, "e", true},
{6, "f", true},
{7, "g", true},
{8, nil, false},
}
for _, test := range tests1 {
// retrievals
actualValue, actualFound := tree.Get(test[0])
if actualValue != test[1] || actualFound != test[2] {
t.Errorf("Got %v expected %v", actualValue, test[1])
}
}
}
func TestAVLTreeRemove(t *testing.T) {
tree := NewWithIntComparator()
tree.Put(5, "e")
tree.Put(6, "f")
tree.Put(7, "g")
tree.Put(3, "c")
tree.Put(4, "d")
tree.Put(1, "x")
tree.Put(2, "b")
tree.Put(1, "a") //overwrite
tree.Remove(5)
tree.Remove(6)
tree.Remove(7)
tree.Remove(8)
tree.Remove(5)
if actualValue, expectedValue := fmt.Sprintf("%d%d%d%d", tree.Keys()...), "1234"; actualValue != expectedValue {
t.Errorf("Got %v expected %v", actualValue, expectedValue)
}
if actualValue, expectedValue := fmt.Sprintf("%s%s%s%s", tree.Values()...), "abcd"; actualValue != expectedValue {
t.Errorf("Got %v expected %v", actualValue, expectedValue)
}
if actualValue, expectedValue := fmt.Sprintf("%s%s%s%s", tree.Values()...), "abcd"; actualValue != expectedValue {
t.Errorf("Got %v expected %v", actualValue, expectedValue)
}
if actualValue := tree.Size(); actualValue != 4 {
t.Errorf("Got %v expected %v", actualValue, 7)
}
tests2 := [][]interface{}{
{1, "a", true},
{2, "b", true},
{3, "c", true},
{4, "d", true},
{5, nil, false},
{6, nil, false},
{7, nil, false},
{8, nil, false},
}
for _, test := range tests2 {
actualValue, actualFound := tree.Get(test[0])
if actualValue != test[1] || actualFound != test[2] {
t.Errorf("Got %v expected %v", actualValue, test[1])
}
}
tree.Remove(1)
tree.Remove(4)
tree.Remove(2)
tree.Remove(3)
tree.Remove(2)
tree.Remove(2)
if actualValue, expectedValue := fmt.Sprintf("%s", tree.Keys()), "[]"; actualValue != expectedValue {
t.Errorf("Got %v expected %v", actualValue, expectedValue)
}
if actualValue, expectedValue := fmt.Sprintf("%s", tree.Values()), "[]"; actualValue != expectedValue {
t.Errorf("Got %v expected %v", actualValue, expectedValue)
}
if empty, size := tree.Empty(), tree.Size(); empty != true || size != -0 {
t.Errorf("Got %v expected %v", empty, true)
}
}
func TestAVLTreeLeftAndRight(t *testing.T) {
tree := NewWithIntComparator()
if actualValue := tree.Left(); actualValue != nil {
t.Errorf("Got %v expected %v", actualValue, nil)
}
if actualValue := tree.Right(); actualValue != nil {
t.Errorf("Got %v expected %v", actualValue, nil)
}
tree.Put(1, "a")
tree.Put(5, "e")
tree.Put(6, "f")
tree.Put(7, "g")
tree.Put(3, "c")
tree.Put(4, "d")
tree.Put(1, "x") // overwrite
tree.Put(2, "b")
if actualValue, expectedValue := fmt.Sprintf("%d", tree.Left().Key), "1"; actualValue != expectedValue {
t.Errorf("Got %v expected %v", actualValue, expectedValue)
}
if actualValue, expectedValue := fmt.Sprintf("%s", tree.Left().Value), "x"; actualValue != expectedValue {
t.Errorf("Got %v expected %v", actualValue, expectedValue)
}
if actualValue, expectedValue := fmt.Sprintf("%d", tree.Right().Key), "7"; actualValue != expectedValue {
t.Errorf("Got %v expected %v", actualValue, expectedValue)
}
if actualValue, expectedValue := fmt.Sprintf("%s", tree.Right().Value), "g"; actualValue != expectedValue {
t.Errorf("Got %v expected %v", actualValue, expectedValue)
}
}
func TestAVLTreeCeilingAndFloor(t *testing.T) {
tree := NewWithIntComparator()
if node, found := tree.Floor(0); node != nil || found {
t.Errorf("Got %v expected %v", node, "<nil>")
}
if node, found := tree.Ceiling(0); node != nil || found {
t.Errorf("Got %v expected %v", node, "<nil>")
}
tree.Put(5, "e")
tree.Put(6, "f")
tree.Put(7, "g")
tree.Put(3, "c")
tree.Put(4, "d")
tree.Put(1, "x")
tree.Put(2, "b")
if node, found := tree.Floor(4); node.Key != 4 || !found {
t.Errorf("Got %v expected %v", node.Key, 4)
}
if node, found := tree.Floor(0); node != nil || found {
t.Errorf("Got %v expected %v", node, "<nil>")
}
if node, found := tree.Ceiling(4); node.Key != 4 || !found {
t.Errorf("Got %v expected %v", node.Key, 4)
}
if node, found := tree.Ceiling(8); node != nil || found {
t.Errorf("Got %v expected %v", node, "<nil>")
}
}
func TestAVLTreeIteratorNextOnEmpty(t *testing.T) {
tree := NewWithIntComparator()
it := tree.Iterator()
for it.Next() {
t.Errorf("Shouldn't iterate on empty tree")
}
}
func TestAVLTreeIteratorPrevOnEmpty(t *testing.T) {
tree := NewWithIntComparator()
it := tree.Iterator()
for it.Prev() {
t.Errorf("Shouldn't iterate on empty tree")
}
}
func TestAVLTreeIterator1Next(t *testing.T) {
tree := NewWithIntComparator()
tree.Put(5, "e")
tree.Put(6, "f")
tree.Put(7, "g")
tree.Put(3, "c")
tree.Put(4, "d")
tree.Put(1, "x")
tree.Put(2, "b")
tree.Put(1, "a") //overwrite
// │ ┌── 7
// └── 6
// │ ┌── 5
// └── 4
// │ ┌── 3
// └── 2
// └── 1
it := tree.Iterator()
count := 0
for it.Next() {
count++
key := it.Key()
switch key {
case count:
if actualValue, expectedValue := key, count; actualValue != expectedValue {
t.Errorf("Got %v expected %v", actualValue, expectedValue)
}
default:
if actualValue, expectedValue := key, count; actualValue != expectedValue {
t.Errorf("Got %v expected %v", actualValue, expectedValue)
}
}
}
if actualValue, expectedValue := count, tree.Size(); actualValue != expectedValue {
t.Errorf("Size different. Got %v expected %v", actualValue, expectedValue)
}
}
func TestAVLTreeIterator1Prev(t *testing.T) {
tree := NewWithIntComparator()
tree.Put(5, "e")
tree.Put(6, "f")
tree.Put(7, "g")
tree.Put(3, "c")
tree.Put(4, "d")
tree.Put(1, "x")
tree.Put(2, "b")
tree.Put(1, "a") //overwrite
// │ ┌── 7
// └── 6
// │ ┌── 5
// └── 4
// │ ┌── 3
// └── 2
// └── 1
it := tree.Iterator()
for it.Next() {
}
countDown := tree.size
for it.Prev() {
key := it.Key()
switch key {
case countDown:
if actualValue, expectedValue := key, countDown; actualValue != expectedValue {
t.Errorf("Got %v expected %v", actualValue, expectedValue)
}
default:
if actualValue, expectedValue := key, countDown; actualValue != expectedValue {
t.Errorf("Got %v expected %v", actualValue, expectedValue)
}
}
countDown--
}
if actualValue, expectedValue := countDown, 0; actualValue != expectedValue {
t.Errorf("Size different. Got %v expected %v", actualValue, expectedValue)
}
}
func TestAVLTreeIterator2Next(t *testing.T) {
tree := NewWithIntComparator()
tree.Put(3, "c")
tree.Put(1, "a")
tree.Put(2, "b")
it := tree.Iterator()
count := 0
for it.Next() {
count++
key := it.Key()
switch key {
case count:
if actualValue, expectedValue := key, count; actualValue != expectedValue {
t.Errorf("Got %v expected %v", actualValue, expectedValue)
}
default:
if actualValue, expectedValue := key, count; actualValue != expectedValue {
t.Errorf("Got %v expected %v", actualValue, expectedValue)
}
}
}
if actualValue, expectedValue := count, tree.Size(); actualValue != expectedValue {
t.Errorf("Size different. Got %v expected %v", actualValue, expectedValue)
}
}
func TestAVLTreeIterator2Prev(t *testing.T) {
tree := NewWithIntComparator()
tree.Put(3, "c")
tree.Put(1, "a")
tree.Put(2, "b")
it := tree.Iterator()
for it.Next() {
}
countDown := tree.size
for it.Prev() {
key := it.Key()
switch key {
case countDown:
if actualValue, expectedValue := key, countDown; actualValue != expectedValue {
t.Errorf("Got %v expected %v", actualValue, expectedValue)
}
default:
if actualValue, expectedValue := key, countDown; actualValue != expectedValue {
t.Errorf("Got %v expected %v", actualValue, expectedValue)
}
}
countDown--
}
if actualValue, expectedValue := countDown, 0; actualValue != expectedValue {
t.Errorf("Size different. Got %v expected %v", actualValue, expectedValue)
}
}
func TestAVLTreeIterator3Next(t *testing.T) {
tree := NewWithIntComparator()
tree.Put(1, "a")
it := tree.Iterator()
count := 0
for it.Next() {
count++
key := it.Key()
switch key {
case count:
if actualValue, expectedValue := key, count; actualValue != expectedValue {
t.Errorf("Got %v expected %v", actualValue, expectedValue)
}
default:
if actualValue, expectedValue := key, count; actualValue != expectedValue {
t.Errorf("Got %v expected %v", actualValue, expectedValue)
}
}
}
if actualValue, expectedValue := count, tree.Size(); actualValue != expectedValue {
t.Errorf("Size different. Got %v expected %v", actualValue, expectedValue)
}
}
func TestAVLTreeIterator3Prev(t *testing.T) {
tree := NewWithIntComparator()
tree.Put(1, "a")
it := tree.Iterator()
for it.Next() {
}
countDown := tree.size
for it.Prev() {
key := it.Key()
switch key {
case countDown:
if actualValue, expectedValue := key, countDown; actualValue != expectedValue {
t.Errorf("Got %v expected %v", actualValue, expectedValue)
}
default:
if actualValue, expectedValue := key, countDown; actualValue != expectedValue {
t.Errorf("Got %v expected %v", actualValue, expectedValue)
}
}
countDown--
}
if actualValue, expectedValue := countDown, 0; actualValue != expectedValue {
t.Errorf("Size different. Got %v expected %v", actualValue, expectedValue)
}
}
func TestAVLTreeIterator4Next(t *testing.T) {
tree := NewWithIntComparator()
tree.Put(13, 5)
tree.Put(8, 3)
tree.Put(17, 7)
tree.Put(1, 1)
tree.Put(11, 4)
tree.Put(15, 6)
tree.Put(25, 9)
tree.Put(6, 2)
tree.Put(22, 8)
tree.Put(27, 10)
// │ ┌── 27
// │ ┌── 25
// │ │ └── 22
// │ ┌── 17
// │ │ └── 15
// └── 13
// │ ┌── 11
// └── 8
// │ ┌── 6
// └── 1
it := tree.Iterator()
count := 0
for it.Next() {
count++
value := it.Value()
switch value {
case count:
if actualValue, expectedValue := value, count; actualValue != expectedValue {
t.Errorf("Got %v expected %v", actualValue, expectedValue)
}
default:
if actualValue, expectedValue := value, count; actualValue != expectedValue {
t.Errorf("Got %v expected %v", actualValue, expectedValue)
}
}
}
if actualValue, expectedValue := count, tree.Size(); actualValue != expectedValue {
t.Errorf("Size different. Got %v expected %v", actualValue, expectedValue)
}
}
func TestAVLTreeIterator4Prev(t *testing.T) {
tree := NewWithIntComparator()
tree.Put(13, 5)
tree.Put(8, 3)
tree.Put(17, 7)
tree.Put(1, 1)
tree.Put(11, 4)
tree.Put(15, 6)
tree.Put(25, 9)
tree.Put(6, 2)
tree.Put(22, 8)
tree.Put(27, 10)
// │ ┌── 27
// │ ┌── 25
// │ │ └── 22
// │ ┌── 17
// │ │ └── 15
// └── 13
// │ ┌── 11
// └── 8
// │ ┌── 6
// └── 1
it := tree.Iterator()
count := tree.Size()
for it.Next() {
}
for it.Prev() {
value := it.Value()
switch value {
case count:
if actualValue, expectedValue := value, count; actualValue != expectedValue {
t.Errorf("Got %v expected %v", actualValue, expectedValue)
}
default:
if actualValue, expectedValue := value, count; actualValue != expectedValue {
t.Errorf("Got %v expected %v", actualValue, expectedValue)
}
}
count--
}
if actualValue, expectedValue := count, 0; actualValue != expectedValue {
t.Errorf("Size different. Got %v expected %v", actualValue, expectedValue)
}
}
func TestAVLTreeIteratorBegin(t *testing.T) {
tree := NewWithIntComparator()
tree.Put(3, "c")
tree.Put(1, "a")
tree.Put(2, "b")
it := tree.Iterator()
if it.Key() != nil {
t.Errorf("Got %v expected %v", it.Key(), nil)
}
it.Begin()
if it.Key() != nil {
t.Errorf("Got %v expected %v", it.Key(), nil)
}
for it.Next() {
}
it.Begin()
if it.Key() != nil {
t.Errorf("Got %v expected %v", it.Key(), nil)
}
it.Next()
if key, value := it.Key(), it.Value(); key != 1 || value != "a" {
t.Errorf("Got %v,%v expected %v,%v", key, value, 1, "a")
}
}
func TestAVLTreeIteratorEnd(t *testing.T) {
tree := NewWithIntComparator()
it := tree.Iterator()
if it.Key() != nil {
t.Errorf("Got %v expected %v", it.Key(), nil)
}
it.End()
if it.Key() != nil {
t.Errorf("Got %v expected %v", it.Key(), nil)
}
tree.Put(3, "c")
tree.Put(1, "a")
tree.Put(2, "b")
it.End()
if it.Key() != nil {
t.Errorf("Got %v expected %v", it.Key(), nil)
}
it.Prev()
if key, value := it.Key(), it.Value(); key != 3 || value != "c" {
t.Errorf("Got %v,%v expected %v,%v", key, value, 3, "c")
}
}
func TestAVLTreeIteratorFirst(t *testing.T) {
tree := NewWithIntComparator()
tree.Put(3, "c")
tree.Put(1, "a")
tree.Put(2, "b")
it := tree.Iterator()
if actualValue, expectedValue := it.First(), true; actualValue != expectedValue {
t.Errorf("Got %v expected %v", actualValue, expectedValue)
}
if key, value := it.Key(), it.Value(); key != 1 || value != "a" {
t.Errorf("Got %v,%v expected %v,%v", key, value, 1, "a")
}
}
func TestAVLTreeIteratorLast(t *testing.T) {
tree := NewWithIntComparator()
tree.Put(3, "c")
tree.Put(1, "a")
tree.Put(2, "b")
it := tree.Iterator()
if actualValue, expectedValue := it.Last(), true; actualValue != expectedValue {
t.Errorf("Got %v expected %v", actualValue, expectedValue)
}
if key, value := it.Key(), it.Value(); key != 3 || value != "c" {
t.Errorf("Got %v,%v expected %v,%v", key, value, 3, "c")
}
}
func TestAVLTreeSerialization(t *testing.T) {
tree := NewWithStringComparator()
tree.Put("c", "3")
tree.Put("b", "2")
tree.Put("a", "1")
var err error
assert := func() {
if actualValue, expectedValue := tree.Size(), 3; actualValue != expectedValue {
t.Errorf("Got %v expected %v", actualValue, expectedValue)
}
if actualValue := tree.Keys(); actualValue[0].(string) != "a" || actualValue[1].(string) != "b" || actualValue[2].(string) != "c" {
t.Errorf("Got %v expected %v", actualValue, "[a,b,c]")
}
if actualValue := tree.Values(); actualValue[0].(string) != "1" || actualValue[1].(string) != "2" || actualValue[2].(string) != "3" {
t.Errorf("Got %v expected %v", actualValue, "[1,2,3]")
}
if err != nil {
t.Errorf("Got error %v", err)
}
}
assert()
json, err := tree.ToJSON()
assert()
err = tree.FromJSON(json)
assert()
}
func benchmarkGet(b *testing.B, tree *Tree, size int) {
for i := 0; i < b.N; i++ {
for n := 0; n < size; n++ {
tree.Get(n)
}
}
}
func benchmarkPut(b *testing.B, tree *Tree, size int) {
for i := 0; i < b.N; i++ {
for n := 0; n < size; n++ {
tree.Put(n, struct{}{})
}
}
}
func benchmarkRemove(b *testing.B, tree *Tree, size int) {
for i := 0; i < b.N; i++ {
for n := 0; n < size; n++ {
tree.Remove(n)
}
}
}
func BenchmarkAVLTreeGet100(b *testing.B) {
b.StopTimer()
size := 100
tree := NewWithIntComparator()
for n := 0; n < size; n++ {
tree.Put(n, struct{}{})
}
b.StartTimer()
benchmarkGet(b, tree, size)
}
func BenchmarkAVLTreeGet1000(b *testing.B) {
b.StopTimer()
size := 1000
tree := NewWithIntComparator()
for n := 0; n < size; n++ {
tree.Put(n, struct{}{})
}
b.StartTimer()
benchmarkGet(b, tree, size)
}
func BenchmarkAVLTreeGet10000(b *testing.B) {
b.StopTimer()
size := 10000
tree := NewWithIntComparator()
for n := 0; n < size; n++ {
tree.Put(n, struct{}{})
}
b.StartTimer()
benchmarkGet(b, tree, size)
}
func BenchmarkAVLTreeGet100000(b *testing.B) {
b.StopTimer()
size := 100000
tree := NewWithIntComparator()
for n := 0; n < size; n++ {
tree.Put(n, struct{}{})
}
b.StartTimer()
benchmarkGet(b, tree, size)
}
func BenchmarkAVLTreePut100(b *testing.B) {
b.StopTimer()
size := 100
tree := NewWithIntComparator()
b.StartTimer()
benchmarkPut(b, tree, size)
}
func BenchmarkAVLTreePut1000(b *testing.B) {
b.StopTimer()
size := 1000
tree := NewWithIntComparator()
for n := 0; n < size; n++ {
tree.Put(n, struct{}{})
}
b.StartTimer()
benchmarkPut(b, tree, size)
}
func BenchmarkAVLTreePut10000(b *testing.B) {
b.StopTimer()
size := 10000
tree := NewWithIntComparator()
for n := 0; n < size; n++ {
tree.Put(n, struct{}{})
}
b.StartTimer()
benchmarkPut(b, tree, size)
}
func BenchmarkAVLTreePut100000(b *testing.B) {
b.StopTimer()
size := 100000
tree := NewWithIntComparator()
for n := 0; n < size; n++ {
tree.Put(n, struct{}{})
}
b.StartTimer()
benchmarkPut(b, tree, size)
}
func BenchmarkAVLTreeRemove100(b *testing.B) {
b.StopTimer()
size := 100
tree := NewWithIntComparator()
for n := 0; n < size; n++ {
tree.Put(n, struct{}{})
}
b.StartTimer()
benchmarkRemove(b, tree, size)
}
func BenchmarkAVLTreeRemove1000(b *testing.B) {
b.StopTimer()
size := 1000
tree := NewWithIntComparator()
for n := 0; n < size; n++ {
tree.Put(n, struct{}{})
}
b.StartTimer()
benchmarkRemove(b, tree, size)
}
func BenchmarkAVLTreeRemove10000(b *testing.B) {
b.StopTimer()
size := 10000
tree := NewWithIntComparator()
for n := 0; n < size; n++ {
tree.Put(n, struct{}{})
}
b.StartTimer()
benchmarkRemove(b, tree, size)
}
func BenchmarkAVLTreeRemove100000(b *testing.B) {
b.StopTimer()
size := 100000
tree := NewWithIntComparator()
for n := 0; n < size; n++ {
tree.Put(n, struct{}{})
}
b.StartTimer()
benchmarkRemove(b, tree, size)
}