mirror of https://github.com/tidwall/tile38.git
410 lines
9.4 KiB
Go
410 lines
9.4 KiB
Go
// Copyright 2014 Google Inc.
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
package btree
|
|
|
|
import (
|
|
"flag"
|
|
"fmt"
|
|
"math/rand"
|
|
"reflect"
|
|
"testing"
|
|
"time"
|
|
)
|
|
|
|
func init() {
|
|
seed := time.Now().Unix()
|
|
fmt.Println(seed)
|
|
rand.Seed(seed)
|
|
}
|
|
|
|
// perm returns a random permutation of n Int items in the range [0, n).
|
|
func perm(n int) (out []Item) {
|
|
for _, v := range rand.Perm(n) {
|
|
out = append(out, Int(v))
|
|
}
|
|
return
|
|
}
|
|
|
|
// rang returns an ordered list of Int items in the range [0, n).
|
|
func rang(n int) (out []Item) {
|
|
for i := 0; i < n; i++ {
|
|
out = append(out, Int(i))
|
|
}
|
|
return
|
|
}
|
|
|
|
// all extracts all items from a tree in order as a slice.
|
|
func all(t *BTree) (out []Item) {
|
|
t.Ascend(func(a Item) bool {
|
|
out = append(out, a)
|
|
return true
|
|
})
|
|
return
|
|
}
|
|
|
|
// rangerev returns a reversed ordered list of Int items in the range [0, n).
|
|
func rangrev(n int) (out []Item) {
|
|
for i := n - 1; i >= 0; i-- {
|
|
out = append(out, Int(i))
|
|
}
|
|
return
|
|
}
|
|
|
|
// allrev extracts all items from a tree in reverse order as a slice.
|
|
func allrev(t *BTree) (out []Item) {
|
|
t.Descend(func(a Item) bool {
|
|
out = append(out, a)
|
|
return true
|
|
})
|
|
return
|
|
}
|
|
|
|
var btreeDegree = flag.Int("degree", 32, "B-Tree degree")
|
|
|
|
func TestBTree(t *testing.T) {
|
|
tr := New(*btreeDegree, 0)
|
|
const treeSize = 10000
|
|
for i := 0; i < 10; i++ {
|
|
if min := tr.Min(); min != nil {
|
|
t.Fatalf("empty min, got %+v", min)
|
|
}
|
|
if max := tr.Max(); max != nil {
|
|
t.Fatalf("empty max, got %+v", max)
|
|
}
|
|
for _, item := range perm(treeSize) {
|
|
if x := tr.ReplaceOrInsert(item); x != nil {
|
|
t.Fatal("insert found item", item)
|
|
}
|
|
}
|
|
for _, item := range perm(treeSize) {
|
|
if x := tr.ReplaceOrInsert(item); x == nil {
|
|
t.Fatal("insert didn't find item", item)
|
|
}
|
|
}
|
|
if min, want := tr.Min(), Item(Int(0)); min != want {
|
|
t.Fatalf("min: want %+v, got %+v", want, min)
|
|
}
|
|
if max, want := tr.Max(), Item(Int(treeSize-1)); max != want {
|
|
t.Fatalf("max: want %+v, got %+v", want, max)
|
|
}
|
|
got := all(tr)
|
|
want := rang(treeSize)
|
|
if !reflect.DeepEqual(got, want) {
|
|
t.Fatalf("mismatch:\n got: %v\nwant: %v", got, want)
|
|
}
|
|
|
|
gotrev := allrev(tr)
|
|
wantrev := rangrev(treeSize)
|
|
if !reflect.DeepEqual(gotrev, wantrev) {
|
|
t.Fatalf("mismatch:\n got: %v\nwant: %v", got, want)
|
|
}
|
|
|
|
for _, item := range perm(treeSize) {
|
|
if x := tr.Delete(item); x == nil {
|
|
t.Fatalf("didn't find %v", item)
|
|
}
|
|
}
|
|
if got = all(tr); len(got) > 0 {
|
|
t.Fatalf("some left!: %v", got)
|
|
}
|
|
}
|
|
}
|
|
|
|
func ExampleBTree() {
|
|
tr := New(*btreeDegree, 0)
|
|
for i := Int(0); i < 10; i++ {
|
|
tr.ReplaceOrInsert(i)
|
|
}
|
|
fmt.Println("len: ", tr.Len())
|
|
fmt.Println("get3: ", tr.Get(Int(3)))
|
|
fmt.Println("get100: ", tr.Get(Int(100)))
|
|
fmt.Println("del4: ", tr.Delete(Int(4)))
|
|
fmt.Println("del100: ", tr.Delete(Int(100)))
|
|
fmt.Println("replace5: ", tr.ReplaceOrInsert(Int(5)))
|
|
fmt.Println("replace100:", tr.ReplaceOrInsert(Int(100)))
|
|
fmt.Println("min: ", tr.Min())
|
|
fmt.Println("delmin: ", tr.DeleteMin())
|
|
fmt.Println("max: ", tr.Max())
|
|
fmt.Println("delmax: ", tr.DeleteMax())
|
|
fmt.Println("len: ", tr.Len())
|
|
// Output:
|
|
// len: 10
|
|
// get3: 3
|
|
// get100: <nil>
|
|
// del4: 4
|
|
// del100: <nil>
|
|
// replace5: 5
|
|
// replace100: <nil>
|
|
// min: 0
|
|
// delmin: 0
|
|
// max: 100
|
|
// delmax: 100
|
|
// len: 8
|
|
}
|
|
|
|
func TestDeleteMin(t *testing.T) {
|
|
tr := New(3, 0)
|
|
for _, v := range perm(100) {
|
|
tr.ReplaceOrInsert(v)
|
|
}
|
|
var got []Item
|
|
for v := tr.DeleteMin(); v != nil; v = tr.DeleteMin() {
|
|
got = append(got, v)
|
|
}
|
|
if want := rang(100); !reflect.DeepEqual(got, want) {
|
|
t.Fatalf("ascendrange:\n got: %v\nwant: %v", got, want)
|
|
}
|
|
}
|
|
|
|
func TestDeleteMax(t *testing.T) {
|
|
tr := New(3, 0)
|
|
for _, v := range perm(100) {
|
|
tr.ReplaceOrInsert(v)
|
|
}
|
|
var got []Item
|
|
for v := tr.DeleteMax(); v != nil; v = tr.DeleteMax() {
|
|
got = append(got, v)
|
|
}
|
|
// Reverse our list.
|
|
for i := 0; i < len(got)/2; i++ {
|
|
got[i], got[len(got)-i-1] = got[len(got)-i-1], got[i]
|
|
}
|
|
if want := rang(100); !reflect.DeepEqual(got, want) {
|
|
t.Fatalf("ascendrange:\n got: %v\nwant: %v", got, want)
|
|
}
|
|
}
|
|
|
|
func TestAscendRange(t *testing.T) {
|
|
tr := New(2, 0)
|
|
for _, v := range perm(100) {
|
|
tr.ReplaceOrInsert(v)
|
|
}
|
|
var got []Item
|
|
tr.AscendRange(Int(40), Int(60), func(a Item) bool {
|
|
got = append(got, a)
|
|
return true
|
|
})
|
|
if want := rang(100)[40:60]; !reflect.DeepEqual(got, want) {
|
|
t.Fatalf("ascendrange:\n got: %v\nwant: %v", got, want)
|
|
}
|
|
got = got[:0]
|
|
tr.AscendRange(Int(40), Int(60), func(a Item) bool {
|
|
if a.(Int) > 50 {
|
|
return false
|
|
}
|
|
got = append(got, a)
|
|
return true
|
|
})
|
|
if want := rang(100)[40:51]; !reflect.DeepEqual(got, want) {
|
|
t.Fatalf("ascendrange:\n got: %v\nwant: %v", got, want)
|
|
}
|
|
}
|
|
|
|
func TestDescendRange(t *testing.T) {
|
|
tr := New(2, 0)
|
|
for _, v := range perm(100) {
|
|
tr.ReplaceOrInsert(v)
|
|
}
|
|
var got []Item
|
|
tr.DescendRange(Int(60), Int(40), func(a Item) bool {
|
|
got = append(got, a)
|
|
return true
|
|
})
|
|
if want := rangrev(100)[39:59]; !reflect.DeepEqual(got, want) {
|
|
t.Fatalf("descendrange:\n got: %v\nwant: %v", got, want)
|
|
}
|
|
got = got[:0]
|
|
tr.DescendRange(Int(60), Int(40), func(a Item) bool {
|
|
if a.(Int) < 50 {
|
|
return false
|
|
}
|
|
got = append(got, a)
|
|
return true
|
|
})
|
|
if want := rangrev(100)[39:50]; !reflect.DeepEqual(got, want) {
|
|
t.Fatalf("descendrange:\n got: %v\nwant: %v", got, want)
|
|
}
|
|
}
|
|
func TestAscendLessThan(t *testing.T) {
|
|
tr := New(*btreeDegree, 0)
|
|
for _, v := range perm(100) {
|
|
tr.ReplaceOrInsert(v)
|
|
}
|
|
var got []Item
|
|
tr.AscendLessThan(Int(60), func(a Item) bool {
|
|
got = append(got, a)
|
|
return true
|
|
})
|
|
if want := rang(100)[:60]; !reflect.DeepEqual(got, want) {
|
|
t.Fatalf("ascendrange:\n got: %v\nwant: %v", got, want)
|
|
}
|
|
got = got[:0]
|
|
tr.AscendLessThan(Int(60), func(a Item) bool {
|
|
if a.(Int) > 50 {
|
|
return false
|
|
}
|
|
got = append(got, a)
|
|
return true
|
|
})
|
|
if want := rang(100)[:51]; !reflect.DeepEqual(got, want) {
|
|
t.Fatalf("ascendrange:\n got: %v\nwant: %v", got, want)
|
|
}
|
|
}
|
|
|
|
func TestDescendLessOrEqual(t *testing.T) {
|
|
tr := New(*btreeDegree, 0)
|
|
for _, v := range perm(100) {
|
|
tr.ReplaceOrInsert(v)
|
|
}
|
|
var got []Item
|
|
tr.DescendLessOrEqual(Int(40), func(a Item) bool {
|
|
got = append(got, a)
|
|
return true
|
|
})
|
|
if want := rangrev(100)[59:]; !reflect.DeepEqual(got, want) {
|
|
t.Fatalf("descendlessorequal:\n got: %v\nwant: %v", got, want)
|
|
}
|
|
got = got[:0]
|
|
tr.DescendLessOrEqual(Int(60), func(a Item) bool {
|
|
if a.(Int) < 50 {
|
|
return false
|
|
}
|
|
got = append(got, a)
|
|
return true
|
|
})
|
|
if want := rangrev(100)[39:50]; !reflect.DeepEqual(got, want) {
|
|
t.Fatalf("descendlessorequal:\n got: %v\nwant: %v", got, want)
|
|
}
|
|
}
|
|
func TestAscendGreaterOrEqual(t *testing.T) {
|
|
tr := New(*btreeDegree, 0)
|
|
for _, v := range perm(100) {
|
|
tr.ReplaceOrInsert(v)
|
|
}
|
|
var got []Item
|
|
tr.AscendGreaterOrEqual(Int(40), func(a Item) bool {
|
|
got = append(got, a)
|
|
return true
|
|
})
|
|
if want := rang(100)[40:]; !reflect.DeepEqual(got, want) {
|
|
t.Fatalf("ascendrange:\n got: %v\nwant: %v", got, want)
|
|
}
|
|
got = got[:0]
|
|
tr.AscendGreaterOrEqual(Int(40), func(a Item) bool {
|
|
if a.(Int) > 50 {
|
|
return false
|
|
}
|
|
got = append(got, a)
|
|
return true
|
|
})
|
|
if want := rang(100)[40:51]; !reflect.DeepEqual(got, want) {
|
|
t.Fatalf("ascendrange:\n got: %v\nwant: %v", got, want)
|
|
}
|
|
}
|
|
|
|
func TestDescendGreaterThan(t *testing.T) {
|
|
tr := New(*btreeDegree, 0)
|
|
for _, v := range perm(100) {
|
|
tr.ReplaceOrInsert(v)
|
|
}
|
|
var got []Item
|
|
tr.DescendGreaterThan(Int(40), func(a Item) bool {
|
|
got = append(got, a)
|
|
return true
|
|
})
|
|
if want := rangrev(100)[:59]; !reflect.DeepEqual(got, want) {
|
|
t.Fatalf("descendgreaterthan:\n got: %v\nwant: %v", got, want)
|
|
}
|
|
got = got[:0]
|
|
tr.DescendGreaterThan(Int(40), func(a Item) bool {
|
|
if a.(Int) < 50 {
|
|
return false
|
|
}
|
|
got = append(got, a)
|
|
return true
|
|
})
|
|
if want := rangrev(100)[:50]; !reflect.DeepEqual(got, want) {
|
|
t.Fatalf("descendgreaterthan:\n got: %v\nwant: %v", got, want)
|
|
}
|
|
}
|
|
|
|
const benchmarkTreeSize = 10000
|
|
|
|
func BenchmarkInsert(b *testing.B) {
|
|
b.StopTimer()
|
|
insertP := perm(benchmarkTreeSize)
|
|
b.StartTimer()
|
|
i := 0
|
|
for i < b.N {
|
|
tr := New(*btreeDegree, 0)
|
|
for _, item := range insertP {
|
|
tr.ReplaceOrInsert(item)
|
|
i++
|
|
if i >= b.N {
|
|
return
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
func BenchmarkDelete(b *testing.B) {
|
|
b.StopTimer()
|
|
insertP := perm(benchmarkTreeSize)
|
|
removeP := perm(benchmarkTreeSize)
|
|
b.StartTimer()
|
|
i := 0
|
|
for i < b.N {
|
|
b.StopTimer()
|
|
tr := New(*btreeDegree, 0)
|
|
for _, v := range insertP {
|
|
tr.ReplaceOrInsert(v)
|
|
}
|
|
b.StartTimer()
|
|
for _, item := range removeP {
|
|
tr.Delete(item)
|
|
i++
|
|
if i >= b.N {
|
|
return
|
|
}
|
|
}
|
|
if tr.Len() > 0 {
|
|
panic(tr.Len())
|
|
}
|
|
}
|
|
}
|
|
|
|
func BenchmarkGet(b *testing.B) {
|
|
b.StopTimer()
|
|
insertP := perm(benchmarkTreeSize)
|
|
removeP := perm(benchmarkTreeSize)
|
|
b.StartTimer()
|
|
i := 0
|
|
for i < b.N {
|
|
b.StopTimer()
|
|
tr := New(*btreeDegree, 0)
|
|
for _, v := range insertP {
|
|
tr.ReplaceOrInsert(v)
|
|
}
|
|
b.StartTimer()
|
|
for _, item := range removeP {
|
|
tr.Get(item)
|
|
i++
|
|
if i >= b.N {
|
|
return
|
|
}
|
|
}
|
|
}
|
|
}
|