add prune and remove unused packages

This commit is contained in:
Michelle Au
2019-03-08 14:54:43 -08:00
parent f59b58d164
commit 8c0accad66
17240 changed files with 27 additions and 4750030 deletions

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@@ -1,23 +0,0 @@
# Compiled Object files, Static and Dynamic libs (Shared Objects)
*.o
*.a
*.so
# Folders
_obj
_test
# Architecture specific extensions/prefixes
*.[568vq]
[568vq].out
*.cgo1.go
*.cgo2.c
_cgo_defun.c
_cgo_gotypes.go
_cgo_export.*
_testmain.go
*.exe
*.test

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@@ -1,306 +0,0 @@
package lru
import (
"math/rand"
"testing"
)
func Benchmark2Q_Rand(b *testing.B) {
l, err := New2Q(8192)
if err != nil {
b.Fatalf("err: %v", err)
}
trace := make([]int64, b.N*2)
for i := 0; i < b.N*2; i++ {
trace[i] = rand.Int63() % 32768
}
b.ResetTimer()
var hit, miss int
for i := 0; i < 2*b.N; i++ {
if i%2 == 0 {
l.Add(trace[i], trace[i])
} else {
_, ok := l.Get(trace[i])
if ok {
hit++
} else {
miss++
}
}
}
b.Logf("hit: %d miss: %d ratio: %f", hit, miss, float64(hit)/float64(miss))
}
func Benchmark2Q_Freq(b *testing.B) {
l, err := New2Q(8192)
if err != nil {
b.Fatalf("err: %v", err)
}
trace := make([]int64, b.N*2)
for i := 0; i < b.N*2; i++ {
if i%2 == 0 {
trace[i] = rand.Int63() % 16384
} else {
trace[i] = rand.Int63() % 32768
}
}
b.ResetTimer()
for i := 0; i < b.N; i++ {
l.Add(trace[i], trace[i])
}
var hit, miss int
for i := 0; i < b.N; i++ {
_, ok := l.Get(trace[i])
if ok {
hit++
} else {
miss++
}
}
b.Logf("hit: %d miss: %d ratio: %f", hit, miss, float64(hit)/float64(miss))
}
func Test2Q_RandomOps(t *testing.T) {
size := 128
l, err := New2Q(128)
if err != nil {
t.Fatalf("err: %v", err)
}
n := 200000
for i := 0; i < n; i++ {
key := rand.Int63() % 512
r := rand.Int63()
switch r % 3 {
case 0:
l.Add(key, key)
case 1:
l.Get(key)
case 2:
l.Remove(key)
}
if l.recent.Len()+l.frequent.Len() > size {
t.Fatalf("bad: recent: %d freq: %d",
l.recent.Len(), l.frequent.Len())
}
}
}
func Test2Q_Get_RecentToFrequent(t *testing.T) {
l, err := New2Q(128)
if err != nil {
t.Fatalf("err: %v", err)
}
// Touch all the entries, should be in t1
for i := 0; i < 128; i++ {
l.Add(i, i)
}
if n := l.recent.Len(); n != 128 {
t.Fatalf("bad: %d", n)
}
if n := l.frequent.Len(); n != 0 {
t.Fatalf("bad: %d", n)
}
// Get should upgrade to t2
for i := 0; i < 128; i++ {
_, ok := l.Get(i)
if !ok {
t.Fatalf("missing: %d", i)
}
}
if n := l.recent.Len(); n != 0 {
t.Fatalf("bad: %d", n)
}
if n := l.frequent.Len(); n != 128 {
t.Fatalf("bad: %d", n)
}
// Get be from t2
for i := 0; i < 128; i++ {
_, ok := l.Get(i)
if !ok {
t.Fatalf("missing: %d", i)
}
}
if n := l.recent.Len(); n != 0 {
t.Fatalf("bad: %d", n)
}
if n := l.frequent.Len(); n != 128 {
t.Fatalf("bad: %d", n)
}
}
func Test2Q_Add_RecentToFrequent(t *testing.T) {
l, err := New2Q(128)
if err != nil {
t.Fatalf("err: %v", err)
}
// Add initially to recent
l.Add(1, 1)
if n := l.recent.Len(); n != 1 {
t.Fatalf("bad: %d", n)
}
if n := l.frequent.Len(); n != 0 {
t.Fatalf("bad: %d", n)
}
// Add should upgrade to frequent
l.Add(1, 1)
if n := l.recent.Len(); n != 0 {
t.Fatalf("bad: %d", n)
}
if n := l.frequent.Len(); n != 1 {
t.Fatalf("bad: %d", n)
}
// Add should remain in frequent
l.Add(1, 1)
if n := l.recent.Len(); n != 0 {
t.Fatalf("bad: %d", n)
}
if n := l.frequent.Len(); n != 1 {
t.Fatalf("bad: %d", n)
}
}
func Test2Q_Add_RecentEvict(t *testing.T) {
l, err := New2Q(4)
if err != nil {
t.Fatalf("err: %v", err)
}
// Add 1,2,3,4,5 -> Evict 1
l.Add(1, 1)
l.Add(2, 2)
l.Add(3, 3)
l.Add(4, 4)
l.Add(5, 5)
if n := l.recent.Len(); n != 4 {
t.Fatalf("bad: %d", n)
}
if n := l.recentEvict.Len(); n != 1 {
t.Fatalf("bad: %d", n)
}
if n := l.frequent.Len(); n != 0 {
t.Fatalf("bad: %d", n)
}
// Pull in the recently evicted
l.Add(1, 1)
if n := l.recent.Len(); n != 3 {
t.Fatalf("bad: %d", n)
}
if n := l.recentEvict.Len(); n != 1 {
t.Fatalf("bad: %d", n)
}
if n := l.frequent.Len(); n != 1 {
t.Fatalf("bad: %d", n)
}
// Add 6, should cause another recent evict
l.Add(6, 6)
if n := l.recent.Len(); n != 3 {
t.Fatalf("bad: %d", n)
}
if n := l.recentEvict.Len(); n != 2 {
t.Fatalf("bad: %d", n)
}
if n := l.frequent.Len(); n != 1 {
t.Fatalf("bad: %d", n)
}
}
func Test2Q(t *testing.T) {
l, err := New2Q(128)
if err != nil {
t.Fatalf("err: %v", err)
}
for i := 0; i < 256; i++ {
l.Add(i, i)
}
if l.Len() != 128 {
t.Fatalf("bad len: %v", l.Len())
}
for i, k := range l.Keys() {
if v, ok := l.Get(k); !ok || v != k || v != i+128 {
t.Fatalf("bad key: %v", k)
}
}
for i := 0; i < 128; i++ {
_, ok := l.Get(i)
if ok {
t.Fatalf("should be evicted")
}
}
for i := 128; i < 256; i++ {
_, ok := l.Get(i)
if !ok {
t.Fatalf("should not be evicted")
}
}
for i := 128; i < 192; i++ {
l.Remove(i)
_, ok := l.Get(i)
if ok {
t.Fatalf("should be deleted")
}
}
l.Purge()
if l.Len() != 0 {
t.Fatalf("bad len: %v", l.Len())
}
if _, ok := l.Get(200); ok {
t.Fatalf("should contain nothing")
}
}
// Test that Contains doesn't update recent-ness
func Test2Q_Contains(t *testing.T) {
l, err := New2Q(2)
if err != nil {
t.Fatalf("err: %v", err)
}
l.Add(1, 1)
l.Add(2, 2)
if !l.Contains(1) {
t.Errorf("1 should be contained")
}
l.Add(3, 3)
if l.Contains(1) {
t.Errorf("Contains should not have updated recent-ness of 1")
}
}
// Test that Peek doesn't update recent-ness
func Test2Q_Peek(t *testing.T) {
l, err := New2Q(2)
if err != nil {
t.Fatalf("err: %v", err)
}
l.Add(1, 1)
l.Add(2, 2)
if v, ok := l.Peek(1); !ok || v != 1 {
t.Errorf("1 should be set to 1: %v, %v", v, ok)
}
l.Add(3, 3)
if l.Contains(1) {
t.Errorf("should not have updated recent-ness of 1")
}
}

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@@ -1,25 +0,0 @@
golang-lru
==========
This provides the `lru` package which implements a fixed-size
thread safe LRU cache. It is based on the cache in Groupcache.
Documentation
=============
Full docs are available on [Godoc](http://godoc.org/github.com/hashicorp/golang-lru)
Example
=======
Using the LRU is very simple:
```go
l, _ := New(128)
for i := 0; i < 256; i++ {
l.Add(i, nil)
}
if l.Len() != 128 {
panic(fmt.Sprintf("bad len: %v", l.Len()))
}
```

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@@ -1,377 +0,0 @@
package lru
import (
"math/rand"
"testing"
"time"
)
func init() {
rand.Seed(time.Now().Unix())
}
func BenchmarkARC_Rand(b *testing.B) {
l, err := NewARC(8192)
if err != nil {
b.Fatalf("err: %v", err)
}
trace := make([]int64, b.N*2)
for i := 0; i < b.N*2; i++ {
trace[i] = rand.Int63() % 32768
}
b.ResetTimer()
var hit, miss int
for i := 0; i < 2*b.N; i++ {
if i%2 == 0 {
l.Add(trace[i], trace[i])
} else {
_, ok := l.Get(trace[i])
if ok {
hit++
} else {
miss++
}
}
}
b.Logf("hit: %d miss: %d ratio: %f", hit, miss, float64(hit)/float64(miss))
}
func BenchmarkARC_Freq(b *testing.B) {
l, err := NewARC(8192)
if err != nil {
b.Fatalf("err: %v", err)
}
trace := make([]int64, b.N*2)
for i := 0; i < b.N*2; i++ {
if i%2 == 0 {
trace[i] = rand.Int63() % 16384
} else {
trace[i] = rand.Int63() % 32768
}
}
b.ResetTimer()
for i := 0; i < b.N; i++ {
l.Add(trace[i], trace[i])
}
var hit, miss int
for i := 0; i < b.N; i++ {
_, ok := l.Get(trace[i])
if ok {
hit++
} else {
miss++
}
}
b.Logf("hit: %d miss: %d ratio: %f", hit, miss, float64(hit)/float64(miss))
}
func TestARC_RandomOps(t *testing.T) {
size := 128
l, err := NewARC(128)
if err != nil {
t.Fatalf("err: %v", err)
}
n := 200000
for i := 0; i < n; i++ {
key := rand.Int63() % 512
r := rand.Int63()
switch r % 3 {
case 0:
l.Add(key, key)
case 1:
l.Get(key)
case 2:
l.Remove(key)
}
if l.t1.Len()+l.t2.Len() > size {
t.Fatalf("bad: t1: %d t2: %d b1: %d b2: %d p: %d",
l.t1.Len(), l.t2.Len(), l.b1.Len(), l.b2.Len(), l.p)
}
if l.b1.Len()+l.b2.Len() > size {
t.Fatalf("bad: t1: %d t2: %d b1: %d b2: %d p: %d",
l.t1.Len(), l.t2.Len(), l.b1.Len(), l.b2.Len(), l.p)
}
}
}
func TestARC_Get_RecentToFrequent(t *testing.T) {
l, err := NewARC(128)
if err != nil {
t.Fatalf("err: %v", err)
}
// Touch all the entries, should be in t1
for i := 0; i < 128; i++ {
l.Add(i, i)
}
if n := l.t1.Len(); n != 128 {
t.Fatalf("bad: %d", n)
}
if n := l.t2.Len(); n != 0 {
t.Fatalf("bad: %d", n)
}
// Get should upgrade to t2
for i := 0; i < 128; i++ {
_, ok := l.Get(i)
if !ok {
t.Fatalf("missing: %d", i)
}
}
if n := l.t1.Len(); n != 0 {
t.Fatalf("bad: %d", n)
}
if n := l.t2.Len(); n != 128 {
t.Fatalf("bad: %d", n)
}
// Get be from t2
for i := 0; i < 128; i++ {
_, ok := l.Get(i)
if !ok {
t.Fatalf("missing: %d", i)
}
}
if n := l.t1.Len(); n != 0 {
t.Fatalf("bad: %d", n)
}
if n := l.t2.Len(); n != 128 {
t.Fatalf("bad: %d", n)
}
}
func TestARC_Add_RecentToFrequent(t *testing.T) {
l, err := NewARC(128)
if err != nil {
t.Fatalf("err: %v", err)
}
// Add initially to t1
l.Add(1, 1)
if n := l.t1.Len(); n != 1 {
t.Fatalf("bad: %d", n)
}
if n := l.t2.Len(); n != 0 {
t.Fatalf("bad: %d", n)
}
// Add should upgrade to t2
l.Add(1, 1)
if n := l.t1.Len(); n != 0 {
t.Fatalf("bad: %d", n)
}
if n := l.t2.Len(); n != 1 {
t.Fatalf("bad: %d", n)
}
// Add should remain in t2
l.Add(1, 1)
if n := l.t1.Len(); n != 0 {
t.Fatalf("bad: %d", n)
}
if n := l.t2.Len(); n != 1 {
t.Fatalf("bad: %d", n)
}
}
func TestARC_Adaptive(t *testing.T) {
l, err := NewARC(4)
if err != nil {
t.Fatalf("err: %v", err)
}
// Fill t1
for i := 0; i < 4; i++ {
l.Add(i, i)
}
if n := l.t1.Len(); n != 4 {
t.Fatalf("bad: %d", n)
}
// Move to t2
l.Get(0)
l.Get(1)
if n := l.t2.Len(); n != 2 {
t.Fatalf("bad: %d", n)
}
// Evict from t1
l.Add(4, 4)
if n := l.b1.Len(); n != 1 {
t.Fatalf("bad: %d", n)
}
// Current state
// t1 : (MRU) [4, 3] (LRU)
// t2 : (MRU) [1, 0] (LRU)
// b1 : (MRU) [2] (LRU)
// b2 : (MRU) [] (LRU)
// Add 2, should cause hit on b1
l.Add(2, 2)
if n := l.b1.Len(); n != 1 {
t.Fatalf("bad: %d", n)
}
if l.p != 1 {
t.Fatalf("bad: %d", l.p)
}
if n := l.t2.Len(); n != 3 {
t.Fatalf("bad: %d", n)
}
// Current state
// t1 : (MRU) [4] (LRU)
// t2 : (MRU) [2, 1, 0] (LRU)
// b1 : (MRU) [3] (LRU)
// b2 : (MRU) [] (LRU)
// Add 4, should migrate to t2
l.Add(4, 4)
if n := l.t1.Len(); n != 0 {
t.Fatalf("bad: %d", n)
}
if n := l.t2.Len(); n != 4 {
t.Fatalf("bad: %d", n)
}
// Current state
// t1 : (MRU) [] (LRU)
// t2 : (MRU) [4, 2, 1, 0] (LRU)
// b1 : (MRU) [3] (LRU)
// b2 : (MRU) [] (LRU)
// Add 4, should evict to b2
l.Add(5, 5)
if n := l.t1.Len(); n != 1 {
t.Fatalf("bad: %d", n)
}
if n := l.t2.Len(); n != 3 {
t.Fatalf("bad: %d", n)
}
if n := l.b2.Len(); n != 1 {
t.Fatalf("bad: %d", n)
}
// Current state
// t1 : (MRU) [5] (LRU)
// t2 : (MRU) [4, 2, 1] (LRU)
// b1 : (MRU) [3] (LRU)
// b2 : (MRU) [0] (LRU)
// Add 0, should decrease p
l.Add(0, 0)
if n := l.t1.Len(); n != 0 {
t.Fatalf("bad: %d", n)
}
if n := l.t2.Len(); n != 4 {
t.Fatalf("bad: %d", n)
}
if n := l.b1.Len(); n != 2 {
t.Fatalf("bad: %d", n)
}
if n := l.b2.Len(); n != 0 {
t.Fatalf("bad: %d", n)
}
if l.p != 0 {
t.Fatalf("bad: %d", l.p)
}
// Current state
// t1 : (MRU) [] (LRU)
// t2 : (MRU) [0, 4, 2, 1] (LRU)
// b1 : (MRU) [5, 3] (LRU)
// b2 : (MRU) [0] (LRU)
}
func TestARC(t *testing.T) {
l, err := NewARC(128)
if err != nil {
t.Fatalf("err: %v", err)
}
for i := 0; i < 256; i++ {
l.Add(i, i)
}
if l.Len() != 128 {
t.Fatalf("bad len: %v", l.Len())
}
for i, k := range l.Keys() {
if v, ok := l.Get(k); !ok || v != k || v != i+128 {
t.Fatalf("bad key: %v", k)
}
}
for i := 0; i < 128; i++ {
_, ok := l.Get(i)
if ok {
t.Fatalf("should be evicted")
}
}
for i := 128; i < 256; i++ {
_, ok := l.Get(i)
if !ok {
t.Fatalf("should not be evicted")
}
}
for i := 128; i < 192; i++ {
l.Remove(i)
_, ok := l.Get(i)
if ok {
t.Fatalf("should be deleted")
}
}
l.Purge()
if l.Len() != 0 {
t.Fatalf("bad len: %v", l.Len())
}
if _, ok := l.Get(200); ok {
t.Fatalf("should contain nothing")
}
}
// Test that Contains doesn't update recent-ness
func TestARC_Contains(t *testing.T) {
l, err := NewARC(2)
if err != nil {
t.Fatalf("err: %v", err)
}
l.Add(1, 1)
l.Add(2, 2)
if !l.Contains(1) {
t.Errorf("1 should be contained")
}
l.Add(3, 3)
if l.Contains(1) {
t.Errorf("Contains should not have updated recent-ness of 1")
}
}
// Test that Peek doesn't update recent-ness
func TestARC_Peek(t *testing.T) {
l, err := NewARC(2)
if err != nil {
t.Fatalf("err: %v", err)
}
l.Add(1, 1)
l.Add(2, 2)
if v, ok := l.Peek(1); !ok || v != 1 {
t.Errorf("1 should be set to 1: %v, %v", v, ok)
}
l.Add(3, 3)
if l.Contains(1) {
t.Errorf("should not have updated recent-ness of 1")
}
}

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@@ -1 +0,0 @@
module github.com/hashicorp/golang-lru

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@@ -1,221 +0,0 @@
package lru
import (
"math/rand"
"testing"
)
func BenchmarkLRU_Rand(b *testing.B) {
l, err := New(8192)
if err != nil {
b.Fatalf("err: %v", err)
}
trace := make([]int64, b.N*2)
for i := 0; i < b.N*2; i++ {
trace[i] = rand.Int63() % 32768
}
b.ResetTimer()
var hit, miss int
for i := 0; i < 2*b.N; i++ {
if i%2 == 0 {
l.Add(trace[i], trace[i])
} else {
_, ok := l.Get(trace[i])
if ok {
hit++
} else {
miss++
}
}
}
b.Logf("hit: %d miss: %d ratio: %f", hit, miss, float64(hit)/float64(miss))
}
func BenchmarkLRU_Freq(b *testing.B) {
l, err := New(8192)
if err != nil {
b.Fatalf("err: %v", err)
}
trace := make([]int64, b.N*2)
for i := 0; i < b.N*2; i++ {
if i%2 == 0 {
trace[i] = rand.Int63() % 16384
} else {
trace[i] = rand.Int63() % 32768
}
}
b.ResetTimer()
for i := 0; i < b.N; i++ {
l.Add(trace[i], trace[i])
}
var hit, miss int
for i := 0; i < b.N; i++ {
_, ok := l.Get(trace[i])
if ok {
hit++
} else {
miss++
}
}
b.Logf("hit: %d miss: %d ratio: %f", hit, miss, float64(hit)/float64(miss))
}
func TestLRU(t *testing.T) {
evictCounter := 0
onEvicted := func(k interface{}, v interface{}) {
if k != v {
t.Fatalf("Evict values not equal (%v!=%v)", k, v)
}
evictCounter++
}
l, err := NewWithEvict(128, onEvicted)
if err != nil {
t.Fatalf("err: %v", err)
}
for i := 0; i < 256; i++ {
l.Add(i, i)
}
if l.Len() != 128 {
t.Fatalf("bad len: %v", l.Len())
}
if evictCounter != 128 {
t.Fatalf("bad evict count: %v", evictCounter)
}
for i, k := range l.Keys() {
if v, ok := l.Get(k); !ok || v != k || v != i+128 {
t.Fatalf("bad key: %v", k)
}
}
for i := 0; i < 128; i++ {
_, ok := l.Get(i)
if ok {
t.Fatalf("should be evicted")
}
}
for i := 128; i < 256; i++ {
_, ok := l.Get(i)
if !ok {
t.Fatalf("should not be evicted")
}
}
for i := 128; i < 192; i++ {
l.Remove(i)
_, ok := l.Get(i)
if ok {
t.Fatalf("should be deleted")
}
}
l.Get(192) // expect 192 to be last key in l.Keys()
for i, k := range l.Keys() {
if (i < 63 && k != i+193) || (i == 63 && k != 192) {
t.Fatalf("out of order key: %v", k)
}
}
l.Purge()
if l.Len() != 0 {
t.Fatalf("bad len: %v", l.Len())
}
if _, ok := l.Get(200); ok {
t.Fatalf("should contain nothing")
}
}
// test that Add returns true/false if an eviction occurred
func TestLRUAdd(t *testing.T) {
evictCounter := 0
onEvicted := func(k interface{}, v interface{}) {
evictCounter++
}
l, err := NewWithEvict(1, onEvicted)
if err != nil {
t.Fatalf("err: %v", err)
}
if l.Add(1, 1) == true || evictCounter != 0 {
t.Errorf("should not have an eviction")
}
if l.Add(2, 2) == false || evictCounter != 1 {
t.Errorf("should have an eviction")
}
}
// test that Contains doesn't update recent-ness
func TestLRUContains(t *testing.T) {
l, err := New(2)
if err != nil {
t.Fatalf("err: %v", err)
}
l.Add(1, 1)
l.Add(2, 2)
if !l.Contains(1) {
t.Errorf("1 should be contained")
}
l.Add(3, 3)
if l.Contains(1) {
t.Errorf("Contains should not have updated recent-ness of 1")
}
}
// test that Contains doesn't update recent-ness
func TestLRUContainsOrAdd(t *testing.T) {
l, err := New(2)
if err != nil {
t.Fatalf("err: %v", err)
}
l.Add(1, 1)
l.Add(2, 2)
contains, evict := l.ContainsOrAdd(1, 1)
if !contains {
t.Errorf("1 should be contained")
}
if evict {
t.Errorf("nothing should be evicted here")
}
l.Add(3, 3)
contains, evict = l.ContainsOrAdd(1, 1)
if contains {
t.Errorf("1 should not have been contained")
}
if !evict {
t.Errorf("an eviction should have occurred")
}
if !l.Contains(1) {
t.Errorf("now 1 should be contained")
}
}
// test that Peek doesn't update recent-ness
func TestLRUPeek(t *testing.T) {
l, err := New(2)
if err != nil {
t.Fatalf("err: %v", err)
}
l.Add(1, 1)
l.Add(2, 2)
if v, ok := l.Peek(1); !ok || v != 1 {
t.Errorf("1 should be set to 1: %v, %v", v, ok)
}
l.Add(3, 3)
if l.Contains(1) {
t.Errorf("should not have updated recent-ness of 1")
}
}

View File

@@ -1,167 +0,0 @@
package simplelru
import "testing"
func TestLRU(t *testing.T) {
evictCounter := 0
onEvicted := func(k interface{}, v interface{}) {
if k != v {
t.Fatalf("Evict values not equal (%v!=%v)", k, v)
}
evictCounter++
}
l, err := NewLRU(128, onEvicted)
if err != nil {
t.Fatalf("err: %v", err)
}
for i := 0; i < 256; i++ {
l.Add(i, i)
}
if l.Len() != 128 {
t.Fatalf("bad len: %v", l.Len())
}
if evictCounter != 128 {
t.Fatalf("bad evict count: %v", evictCounter)
}
for i, k := range l.Keys() {
if v, ok := l.Get(k); !ok || v != k || v != i+128 {
t.Fatalf("bad key: %v", k)
}
}
for i := 0; i < 128; i++ {
_, ok := l.Get(i)
if ok {
t.Fatalf("should be evicted")
}
}
for i := 128; i < 256; i++ {
_, ok := l.Get(i)
if !ok {
t.Fatalf("should not be evicted")
}
}
for i := 128; i < 192; i++ {
ok := l.Remove(i)
if !ok {
t.Fatalf("should be contained")
}
ok = l.Remove(i)
if ok {
t.Fatalf("should not be contained")
}
_, ok = l.Get(i)
if ok {
t.Fatalf("should be deleted")
}
}
l.Get(192) // expect 192 to be last key in l.Keys()
for i, k := range l.Keys() {
if (i < 63 && k != i+193) || (i == 63 && k != 192) {
t.Fatalf("out of order key: %v", k)
}
}
l.Purge()
if l.Len() != 0 {
t.Fatalf("bad len: %v", l.Len())
}
if _, ok := l.Get(200); ok {
t.Fatalf("should contain nothing")
}
}
func TestLRU_GetOldest_RemoveOldest(t *testing.T) {
l, err := NewLRU(128, nil)
if err != nil {
t.Fatalf("err: %v", err)
}
for i := 0; i < 256; i++ {
l.Add(i, i)
}
k, _, ok := l.GetOldest()
if !ok {
t.Fatalf("missing")
}
if k.(int) != 128 {
t.Fatalf("bad: %v", k)
}
k, _, ok = l.RemoveOldest()
if !ok {
t.Fatalf("missing")
}
if k.(int) != 128 {
t.Fatalf("bad: %v", k)
}
k, _, ok = l.RemoveOldest()
if !ok {
t.Fatalf("missing")
}
if k.(int) != 129 {
t.Fatalf("bad: %v", k)
}
}
// Test that Add returns true/false if an eviction occurred
func TestLRU_Add(t *testing.T) {
evictCounter := 0
onEvicted := func(k interface{}, v interface{}) {
evictCounter++
}
l, err := NewLRU(1, onEvicted)
if err != nil {
t.Fatalf("err: %v", err)
}
if l.Add(1, 1) == true || evictCounter != 0 {
t.Errorf("should not have an eviction")
}
if l.Add(2, 2) == false || evictCounter != 1 {
t.Errorf("should have an eviction")
}
}
// Test that Contains doesn't update recent-ness
func TestLRU_Contains(t *testing.T) {
l, err := NewLRU(2, nil)
if err != nil {
t.Fatalf("err: %v", err)
}
l.Add(1, 1)
l.Add(2, 2)
if !l.Contains(1) {
t.Errorf("1 should be contained")
}
l.Add(3, 3)
if l.Contains(1) {
t.Errorf("Contains should not have updated recent-ness of 1")
}
}
// Test that Peek doesn't update recent-ness
func TestLRU_Peek(t *testing.T) {
l, err := NewLRU(2, nil)
if err != nil {
t.Fatalf("err: %v", err)
}
l.Add(1, 1)
l.Add(2, 2)
if v, ok := l.Peek(1); !ok || v != 1 {
t.Errorf("1 should be set to 1: %v, %v", v, ok)
}
l.Add(3, 3)
if l.Contains(1) {
t.Errorf("should not have updated recent-ness of 1")
}
}