mirror of https://github.com/tidwall/tile38.git
569 lines
11 KiB
Go
569 lines
11 KiB
Go
package tinybtree
|
|
|
|
import (
|
|
"fmt"
|
|
"math/rand"
|
|
"sort"
|
|
"strings"
|
|
"testing"
|
|
"time"
|
|
)
|
|
|
|
func init() {
|
|
seed := time.Now().UnixNano()
|
|
fmt.Printf("seed: %d\n", seed)
|
|
rand.Seed(seed)
|
|
}
|
|
|
|
func randKeys(N int) (keys []string) {
|
|
format := fmt.Sprintf("%%0%dd", len(fmt.Sprintf("%d", N-1)))
|
|
for _, i := range rand.Perm(N) {
|
|
keys = append(keys, fmt.Sprintf(format, i))
|
|
}
|
|
return
|
|
}
|
|
|
|
const flatLeaf = true
|
|
|
|
func (tr *BTree) print() {
|
|
tr.root.print(0, tr.height)
|
|
}
|
|
|
|
func (n *node) print(level, height int) {
|
|
if n == nil {
|
|
println("NIL")
|
|
return
|
|
}
|
|
if height == 0 && flatLeaf {
|
|
fmt.Printf("%s", strings.Repeat(" ", level))
|
|
}
|
|
for i := 0; i < n.numItems; i++ {
|
|
if height > 0 {
|
|
n.children[i].print(level+1, height-1)
|
|
}
|
|
if height > 0 || (height == 0 && !flatLeaf) {
|
|
fmt.Printf("%s%v\n", strings.Repeat(" ", level), n.items[i].key)
|
|
} else {
|
|
if i > 0 {
|
|
fmt.Printf(",")
|
|
}
|
|
fmt.Printf("%s", n.items[i].key)
|
|
}
|
|
}
|
|
if height == 0 && flatLeaf {
|
|
fmt.Printf("\n")
|
|
}
|
|
if height > 0 {
|
|
n.children[n.numItems].print(level+1, height-1)
|
|
}
|
|
}
|
|
|
|
func (tr *BTree) deepPrint() {
|
|
fmt.Printf("%#v\n", tr)
|
|
tr.root.deepPrint(0, tr.height)
|
|
}
|
|
|
|
func (n *node) deepPrint(level, height int) {
|
|
if n == nil {
|
|
fmt.Printf("%s %#v\n", strings.Repeat(" ", level), n)
|
|
return
|
|
}
|
|
fmt.Printf("%s count: %v\n", strings.Repeat(" ", level), n.numItems)
|
|
fmt.Printf("%s items: %v\n", strings.Repeat(" ", level), n.items)
|
|
if height > 0 {
|
|
fmt.Printf("%s child: %v\n", strings.Repeat(" ", level), n.children)
|
|
}
|
|
if height > 0 {
|
|
for i := 0; i < n.numItems; i++ {
|
|
n.children[i].deepPrint(level+1, height-1)
|
|
}
|
|
n.children[n.numItems].deepPrint(level+1, height-1)
|
|
}
|
|
}
|
|
|
|
func stringsEquals(a, b []string) bool {
|
|
if len(a) != len(b) {
|
|
return false
|
|
}
|
|
for i := 0; i < len(a); i++ {
|
|
if a[i] != b[i] {
|
|
return false
|
|
}
|
|
}
|
|
return true
|
|
}
|
|
|
|
func TestDescend(t *testing.T) {
|
|
var tr BTree
|
|
var count int
|
|
tr.Descend("1", func(key string, value interface{}) bool {
|
|
count++
|
|
return true
|
|
})
|
|
if count > 0 {
|
|
t.Fatalf("expected 0, got %v", count)
|
|
}
|
|
var keys []string
|
|
for i := 0; i < 1000; i += 10 {
|
|
keys = append(keys, fmt.Sprintf("%03d", i))
|
|
tr.Set(keys[len(keys)-1], nil)
|
|
}
|
|
var exp []string
|
|
tr.Reverse(func(key string, _ interface{}) bool {
|
|
exp = append(exp, key)
|
|
return true
|
|
})
|
|
for i := 999; i >= 0; i-- {
|
|
var key string
|
|
key = fmt.Sprintf("%03d", i)
|
|
var all []string
|
|
tr.Descend(key, func(key string, value interface{}) bool {
|
|
all = append(all, key)
|
|
return true
|
|
})
|
|
for len(exp) > 0 && key < exp[0] {
|
|
exp = exp[1:]
|
|
}
|
|
var count int
|
|
tr.Descend(key, func(key string, value interface{}) bool {
|
|
if count == (i+1)%maxItems {
|
|
return false
|
|
}
|
|
count++
|
|
return true
|
|
})
|
|
if count > len(exp) {
|
|
t.Fatalf("expected 1, got %v", count)
|
|
}
|
|
|
|
if !stringsEquals(exp, all) {
|
|
fmt.Printf("exp: %v\n", exp)
|
|
fmt.Printf("all: %v\n", all)
|
|
t.Fatal("mismatch")
|
|
}
|
|
}
|
|
}
|
|
|
|
func TestAscend(t *testing.T) {
|
|
var tr BTree
|
|
var count int
|
|
tr.Ascend("1", func(key string, value interface{}) bool {
|
|
count++
|
|
return true
|
|
})
|
|
if count > 0 {
|
|
t.Fatalf("expected 0, got %v", count)
|
|
}
|
|
var keys []string
|
|
for i := 0; i < 1000; i += 10 {
|
|
keys = append(keys, fmt.Sprintf("%03d", i))
|
|
tr.Set(keys[len(keys)-1], nil)
|
|
}
|
|
exp := keys
|
|
for i := -1; i < 1000; i++ {
|
|
var key string
|
|
if i == -1 {
|
|
key = ""
|
|
} else {
|
|
key = fmt.Sprintf("%03d", i)
|
|
}
|
|
var all []string
|
|
tr.Ascend(key, func(key string, value interface{}) bool {
|
|
all = append(all, key)
|
|
return true
|
|
})
|
|
|
|
for len(exp) > 0 && key > exp[0] {
|
|
exp = exp[1:]
|
|
}
|
|
var count int
|
|
tr.Ascend(key, func(key string, value interface{}) bool {
|
|
if count == (i+1)%maxItems {
|
|
return false
|
|
}
|
|
count++
|
|
return true
|
|
})
|
|
if count > len(exp) {
|
|
t.Fatalf("expected 1, got %v", count)
|
|
}
|
|
if !stringsEquals(exp, all) {
|
|
t.Fatal("mismatch")
|
|
}
|
|
}
|
|
}
|
|
|
|
func TestBTree(t *testing.T) {
|
|
N := 10000
|
|
var tr BTree
|
|
keys := randKeys(N)
|
|
|
|
// insert all items
|
|
for _, key := range keys {
|
|
value, replaced := tr.Set(key, key)
|
|
if replaced {
|
|
t.Fatal("expected false")
|
|
}
|
|
if value != nil {
|
|
t.Fatal("expected nil")
|
|
}
|
|
}
|
|
|
|
// check length
|
|
if tr.Len() != len(keys) {
|
|
t.Fatalf("expected %v, got %v", len(keys), tr.Len())
|
|
}
|
|
|
|
// get each value
|
|
for _, key := range keys {
|
|
value, gotten := tr.Get(key)
|
|
if !gotten {
|
|
t.Fatal("expected true")
|
|
}
|
|
if value == nil || value.(string) != key {
|
|
t.Fatalf("expected '%v', got '%v'", key, value)
|
|
}
|
|
}
|
|
|
|
// scan all items
|
|
var last string
|
|
all := make(map[string]interface{})
|
|
tr.Scan(func(key string, value interface{}) bool {
|
|
if key <= last {
|
|
t.Fatal("out of order")
|
|
}
|
|
if value.(string) != key {
|
|
t.Fatalf("mismatch")
|
|
}
|
|
last = key
|
|
all[key] = value
|
|
return true
|
|
})
|
|
if len(all) != len(keys) {
|
|
t.Fatalf("expected '%v', got '%v'", len(keys), len(all))
|
|
}
|
|
|
|
// reverse all items
|
|
var prev string
|
|
all = make(map[string]interface{})
|
|
tr.Reverse(func(key string, value interface{}) bool {
|
|
if prev != "" && key >= prev {
|
|
t.Fatal("out of order")
|
|
}
|
|
if value.(string) != key {
|
|
t.Fatalf("mismatch")
|
|
}
|
|
prev = key
|
|
all[key] = value
|
|
return true
|
|
})
|
|
if len(all) != len(keys) {
|
|
t.Fatalf("expected '%v', got '%v'", len(keys), len(all))
|
|
}
|
|
|
|
// try to get an invalid item
|
|
value, gotten := tr.Get("invalid")
|
|
if gotten {
|
|
t.Fatal("expected false")
|
|
}
|
|
if value != nil {
|
|
t.Fatal("expected nil")
|
|
}
|
|
|
|
// scan and quit at various steps
|
|
for i := 0; i < 100; i++ {
|
|
var j int
|
|
tr.Scan(func(key string, value interface{}) bool {
|
|
if j == i {
|
|
return false
|
|
}
|
|
j++
|
|
return true
|
|
})
|
|
}
|
|
|
|
// reverse and quit at various steps
|
|
for i := 0; i < 100; i++ {
|
|
var j int
|
|
tr.Reverse(func(key string, value interface{}) bool {
|
|
if j == i {
|
|
return false
|
|
}
|
|
j++
|
|
return true
|
|
})
|
|
}
|
|
|
|
// delete half the items
|
|
for _, key := range keys[:len(keys)/2] {
|
|
value, deleted := tr.Delete(key)
|
|
if !deleted {
|
|
t.Fatal("expected true")
|
|
}
|
|
if value == nil || value.(string) != key {
|
|
t.Fatalf("expected '%v', got '%v'", key, value)
|
|
}
|
|
}
|
|
|
|
// check length
|
|
if tr.Len() != len(keys)/2 {
|
|
t.Fatalf("expected %v, got %v", len(keys)/2, tr.Len())
|
|
}
|
|
|
|
// try delete half again
|
|
for _, key := range keys[:len(keys)/2] {
|
|
value, deleted := tr.Delete(key)
|
|
if deleted {
|
|
t.Fatal("expected false")
|
|
}
|
|
if value != nil {
|
|
t.Fatalf("expected nil")
|
|
}
|
|
}
|
|
|
|
// try delete half again
|
|
for _, key := range keys[:len(keys)/2] {
|
|
value, deleted := tr.Delete(key)
|
|
if deleted {
|
|
t.Fatal("expected false")
|
|
}
|
|
if value != nil {
|
|
t.Fatalf("expected nil")
|
|
}
|
|
}
|
|
|
|
// check length
|
|
if tr.Len() != len(keys)/2 {
|
|
t.Fatalf("expected %v, got %v", len(keys)/2, tr.Len())
|
|
}
|
|
|
|
// scan items
|
|
last = ""
|
|
all = make(map[string]interface{})
|
|
tr.Scan(func(key string, value interface{}) bool {
|
|
if key <= last {
|
|
t.Fatal("out of order")
|
|
}
|
|
if value.(string) != key {
|
|
t.Fatalf("mismatch")
|
|
}
|
|
last = key
|
|
all[key] = value
|
|
return true
|
|
})
|
|
if len(all) != len(keys)/2 {
|
|
t.Fatalf("expected '%v', got '%v'", len(keys), len(all))
|
|
}
|
|
|
|
// replace second half
|
|
for _, key := range keys[len(keys)/2:] {
|
|
value, replaced := tr.Set(key, key)
|
|
if !replaced {
|
|
t.Fatal("expected true")
|
|
}
|
|
if value == nil || value.(string) != key {
|
|
t.Fatalf("expected '%v', got '%v'", key, value)
|
|
}
|
|
}
|
|
|
|
// delete next half the items
|
|
for _, key := range keys[len(keys)/2:] {
|
|
value, deleted := tr.Delete(key)
|
|
if !deleted {
|
|
t.Fatal("expected true")
|
|
}
|
|
if value == nil || value.(string) != key {
|
|
t.Fatalf("expected '%v', got '%v'", key, value)
|
|
}
|
|
}
|
|
|
|
// check length
|
|
if tr.Len() != 0 {
|
|
t.Fatalf("expected %v, got %v", 0, tr.Len())
|
|
}
|
|
|
|
// do some stuff on an empty tree
|
|
value, gotten = tr.Get(keys[0])
|
|
if gotten {
|
|
t.Fatal("expected false")
|
|
}
|
|
if value != nil {
|
|
t.Fatal("expected nil")
|
|
}
|
|
tr.Scan(func(key string, value interface{}) bool {
|
|
t.Fatal("should not be reached")
|
|
return true
|
|
})
|
|
tr.Reverse(func(key string, value interface{}) bool {
|
|
t.Fatal("should not be reached")
|
|
return true
|
|
})
|
|
|
|
var deleted bool
|
|
value, deleted = tr.Delete("invalid")
|
|
if deleted {
|
|
t.Fatal("expected false")
|
|
}
|
|
if value != nil {
|
|
t.Fatal("expected nil")
|
|
}
|
|
}
|
|
|
|
func BenchmarkTidwallSequentialSet(b *testing.B) {
|
|
var tr BTree
|
|
keys := randKeys(b.N)
|
|
sort.Strings(keys)
|
|
b.ResetTimer()
|
|
for i := 0; i < b.N; i++ {
|
|
tr.Set(keys[i], nil)
|
|
}
|
|
}
|
|
|
|
func BenchmarkTidwallSequentialGet(b *testing.B) {
|
|
var tr BTree
|
|
keys := randKeys(b.N)
|
|
sort.Strings(keys)
|
|
for i := 0; i < b.N; i++ {
|
|
tr.Set(keys[i], nil)
|
|
}
|
|
b.ResetTimer()
|
|
for i := 0; i < b.N; i++ {
|
|
tr.Get(keys[i])
|
|
}
|
|
}
|
|
|
|
func BenchmarkTidwallRandomSet(b *testing.B) {
|
|
var tr BTree
|
|
keys := randKeys(b.N)
|
|
b.ResetTimer()
|
|
for i := 0; i < b.N; i++ {
|
|
tr.Set(keys[i], nil)
|
|
}
|
|
}
|
|
|
|
func BenchmarkTidwallRandomGet(b *testing.B) {
|
|
var tr BTree
|
|
keys := randKeys(b.N)
|
|
for i := 0; i < b.N; i++ {
|
|
tr.Set(keys[i], nil)
|
|
}
|
|
b.ResetTimer()
|
|
for i := 0; i < b.N; i++ {
|
|
tr.Get(keys[i])
|
|
}
|
|
}
|
|
|
|
// type googleKind struct {
|
|
// key string
|
|
// }
|
|
|
|
// func (a *googleKind) Less(b btree.Item) bool {
|
|
// return a.key < b.(*googleKind).key
|
|
// }
|
|
|
|
// func BenchmarkGoogleSequentialSet(b *testing.B) {
|
|
// tr := btree.New(32)
|
|
// keys := randKeys(b.N)
|
|
// sort.Strings(keys)
|
|
// gkeys := make([]*googleKind, len(keys))
|
|
// for i := 0; i < b.N; i++ {
|
|
// gkeys[i] = &googleKind{keys[i]}
|
|
// }
|
|
// b.ResetTimer()
|
|
// for i := 0; i < b.N; i++ {
|
|
// tr.ReplaceOrInsert(gkeys[i])
|
|
// }
|
|
// }
|
|
|
|
// func BenchmarkGoogleSequentialGet(b *testing.B) {
|
|
// tr := btree.New(32)
|
|
// keys := randKeys(b.N)
|
|
// gkeys := make([]*googleKind, len(keys))
|
|
// for i := 0; i < b.N; i++ {
|
|
// gkeys[i] = &googleKind{keys[i]}
|
|
// }
|
|
// for i := 0; i < b.N; i++ {
|
|
// tr.ReplaceOrInsert(gkeys[i])
|
|
// }
|
|
// sort.Strings(keys)
|
|
// b.ResetTimer()
|
|
// for i := 0; i < b.N; i++ {
|
|
// tr.Get(gkeys[i])
|
|
// }
|
|
// }
|
|
|
|
// func BenchmarkGoogleRandomSet(b *testing.B) {
|
|
// tr := btree.New(32)
|
|
// keys := randKeys(b.N)
|
|
// gkeys := make([]*googleKind, len(keys))
|
|
// for i := 0; i < b.N; i++ {
|
|
// gkeys[i] = &googleKind{keys[i]}
|
|
// }
|
|
// b.ResetTimer()
|
|
// for i := 0; i < b.N; i++ {
|
|
// tr.ReplaceOrInsert(gkeys[i])
|
|
// }
|
|
// }
|
|
|
|
// func BenchmarkGoogleRandomGet(b *testing.B) {
|
|
// tr := btree.New(32)
|
|
// keys := randKeys(b.N)
|
|
// gkeys := make([]*googleKind, len(keys))
|
|
// for i := 0; i < b.N; i++ {
|
|
// gkeys[i] = &googleKind{keys[i]}
|
|
// }
|
|
// for i := 0; i < b.N; i++ {
|
|
// tr.ReplaceOrInsert(gkeys[i])
|
|
// }
|
|
// b.ResetTimer()
|
|
// for i := 0; i < b.N; i++ {
|
|
// tr.Get(gkeys[i])
|
|
// }
|
|
// }
|
|
|
|
func TestBTreeOne(t *testing.T) {
|
|
var tr BTree
|
|
tr.Set("1", "1")
|
|
tr.Delete("1")
|
|
tr.Set("1", "1")
|
|
tr.Delete("1")
|
|
tr.Set("1", "1")
|
|
tr.Delete("1")
|
|
}
|
|
|
|
func TestBTree256(t *testing.T) {
|
|
var tr BTree
|
|
var n int
|
|
for j := 0; j < 2; j++ {
|
|
for _, i := range rand.Perm(256) {
|
|
tr.Set(fmt.Sprintf("%d", i), i)
|
|
n++
|
|
if tr.Len() != n {
|
|
t.Fatalf("expected 256, got %d", n)
|
|
}
|
|
}
|
|
for _, i := range rand.Perm(256) {
|
|
v, ok := tr.Get(fmt.Sprintf("%d", i))
|
|
if !ok {
|
|
t.Fatal("expected true")
|
|
}
|
|
if v.(int) != i {
|
|
t.Fatalf("expected %d, got %d", i, v.(int))
|
|
}
|
|
}
|
|
for _, i := range rand.Perm(256) {
|
|
tr.Delete(fmt.Sprintf("%d", i))
|
|
n--
|
|
if tr.Len() != n {
|
|
t.Fatalf("expected 256, got %d", n)
|
|
}
|
|
}
|
|
for _, i := range rand.Perm(256) {
|
|
_, ok := tr.Get(fmt.Sprintf("%d", i))
|
|
if ok {
|
|
t.Fatal("expected false")
|
|
}
|
|
}
|
|
}
|
|
}
|