296 lines
8 KiB
Go
296 lines
8 KiB
Go
package ccache
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import (
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"strconv"
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"sync/atomic"
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"testing"
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"time"
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. "github.com/karlseguin/expect"
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)
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type CacheTests struct{}
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func Test_Cache(t *testing.T) {
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Expectify(new(CacheTests), t)
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}
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func (_ CacheTests) DeletesAValue() {
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cache := New(Configure())
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Expect(cache.ItemCount()).To.Equal(0)
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cache.Set("spice", "flow", time.Minute)
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cache.Set("worm", "sand", time.Minute)
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Expect(cache.ItemCount()).To.Equal(2)
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cache.Delete("spice")
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Expect(cache.Get("spice")).To.Equal(nil)
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Expect(cache.Get("worm").Value()).To.Equal("sand")
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Expect(cache.ItemCount()).To.Equal(1)
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}
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func (_ CacheTests) DeletesAPrefix() {
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cache := New(Configure())
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Expect(cache.ItemCount()).To.Equal(0)
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cache.Set("aaa", "1", time.Minute)
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cache.Set("aab", "2", time.Minute)
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cache.Set("aac", "3", time.Minute)
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cache.Set("ac", "4", time.Minute)
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cache.Set("z5", "7", time.Minute)
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Expect(cache.ItemCount()).To.Equal(5)
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Expect(cache.DeletePrefix("9a")).To.Equal(0)
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Expect(cache.ItemCount()).To.Equal(5)
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Expect(cache.DeletePrefix("aa")).To.Equal(3)
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Expect(cache.Get("aaa")).To.Equal(nil)
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Expect(cache.Get("aab")).To.Equal(nil)
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Expect(cache.Get("aac")).To.Equal(nil)
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Expect(cache.Get("ac").Value()).To.Equal("4")
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Expect(cache.Get("z5").Value()).To.Equal("7")
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Expect(cache.ItemCount()).To.Equal(2)
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}
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func (_ CacheTests) DeletesAFunc() {
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cache := New(Configure())
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Expect(cache.ItemCount()).To.Equal(0)
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cache.Set("a", 1, time.Minute)
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cache.Set("b", 2, time.Minute)
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cache.Set("c", 3, time.Minute)
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cache.Set("d", 4, time.Minute)
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cache.Set("e", 5, time.Minute)
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cache.Set("f", 6, time.Minute)
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Expect(cache.ItemCount()).To.Equal(6)
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Expect(cache.DeleteFunc(func(key string, item *Item) bool {
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return false
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})).To.Equal(0)
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Expect(cache.ItemCount()).To.Equal(6)
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Expect(cache.DeleteFunc(func(key string, item *Item) bool {
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return item.Value().(int) < 4
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})).To.Equal(3)
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Expect(cache.ItemCount()).To.Equal(3)
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Expect(cache.DeleteFunc(func(key string, item *Item) bool {
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return key == "d"
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})).To.Equal(1)
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Expect(cache.ItemCount()).To.Equal(2)
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}
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func (_ CacheTests) OnDeleteCallbackCalled() {
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onDeleteFnCalled := int32(0)
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onDeleteFn := func(item *Item) {
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if item.key == "spice" {
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atomic.AddInt32(&onDeleteFnCalled, 1)
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}
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}
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cache := New(Configure().OnDelete(onDeleteFn))
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cache.Set("spice", "flow", time.Minute)
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cache.Set("worm", "sand", time.Minute)
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time.Sleep(time.Millisecond * 10) // Run once to init
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cache.Delete("spice")
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time.Sleep(time.Millisecond * 10) // Wait for worker to pick up deleted items
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Expect(cache.Get("spice")).To.Equal(nil)
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Expect(cache.Get("worm").Value()).To.Equal("sand")
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Expect(atomic.LoadInt32(&onDeleteFnCalled)).To.Eql(1)
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}
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func (_ CacheTests) FetchesExpiredItems() {
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cache := New(Configure())
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fn := func() (interface{}, error) { return "moo-moo", nil }
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cache.Set("beef", "moo", time.Second*-1)
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Expect(cache.Get("beef").Value()).To.Equal("moo")
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out, _ := cache.Fetch("beef", time.Second, fn)
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Expect(out.Value()).To.Equal("moo-moo")
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}
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func (_ CacheTests) GCsTheOldestItems() {
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cache := New(Configure().ItemsToPrune(10))
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for i := 0; i < 500; i++ {
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cache.Set(strconv.Itoa(i), i, time.Minute)
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}
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//let the items get promoted (and added to our list)
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time.Sleep(time.Millisecond * 10)
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gcCache(cache)
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Expect(cache.Get("9")).To.Equal(nil)
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Expect(cache.Get("10").Value()).To.Equal(10)
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Expect(cache.ItemCount()).To.Equal(490)
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}
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func (_ CacheTests) PromotedItemsDontGetPruned() {
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cache := New(Configure().ItemsToPrune(10).GetsPerPromote(1))
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for i := 0; i < 500; i++ {
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cache.Set(strconv.Itoa(i), i, time.Minute)
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}
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time.Sleep(time.Millisecond * 10) //run the worker once to init the list
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cache.Get("9")
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time.Sleep(time.Millisecond * 10)
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gcCache(cache)
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Expect(cache.Get("9").Value()).To.Equal(9)
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Expect(cache.Get("10")).To.Equal(nil)
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Expect(cache.Get("11").Value()).To.Equal(11)
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}
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func (_ CacheTests) TrackerDoesNotCleanupHeldInstance() {
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cache := New(Configure().ItemsToPrune(11).Track())
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item0 := cache.TrackingSet("0", 0, time.Minute)
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for i := 1; i < 11; i++ {
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cache.Set(strconv.Itoa(i), i, time.Minute)
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}
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item1 := cache.TrackingGet("1")
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time.Sleep(time.Millisecond * 10)
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gcCache(cache)
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Expect(cache.Get("0").Value()).To.Equal(0)
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Expect(cache.Get("1").Value()).To.Equal(1)
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item0.Release()
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item1.Release()
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gcCache(cache)
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Expect(cache.Get("0")).To.Equal(nil)
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Expect(cache.Get("1")).To.Equal(nil)
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}
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func (_ CacheTests) RemovesOldestItemWhenFull() {
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onDeleteFnCalled := false
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onDeleteFn := func(item *Item) {
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if item.key == "0" {
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onDeleteFnCalled = true
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}
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}
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cache := New(Configure().MaxSize(5).ItemsToPrune(1).OnDelete(onDeleteFn))
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for i := 0; i < 7; i++ {
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cache.Set(strconv.Itoa(i), i, time.Minute)
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}
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time.Sleep(time.Millisecond * 10)
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Expect(cache.Get("0")).To.Equal(nil)
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Expect(cache.Get("1")).To.Equal(nil)
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Expect(cache.Get("2").Value()).To.Equal(2)
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Expect(onDeleteFnCalled).To.Equal(true)
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Expect(cache.ItemCount()).To.Equal(5)
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}
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func (_ CacheTests) RemovesOldestItemWhenFullBySizer() {
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cache := New(Configure().MaxSize(9).ItemsToPrune(2))
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for i := 0; i < 7; i++ {
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cache.Set(strconv.Itoa(i), &SizedItem{i, 2}, time.Minute)
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}
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time.Sleep(time.Millisecond * 10)
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Expect(cache.Get("0")).To.Equal(nil)
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Expect(cache.Get("1")).To.Equal(nil)
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Expect(cache.Get("2")).To.Equal(nil)
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Expect(cache.Get("3")).To.Equal(nil)
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Expect(cache.Get("4").Value().(*SizedItem).id).To.Equal(4)
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Expect(cache.GetDropped()).To.Equal(4)
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Expect(cache.GetDropped()).To.Equal(0)
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}
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func (_ CacheTests) SetUpdatesSizeOnDelta() {
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cache := New(Configure())
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cache.Set("a", &SizedItem{0, 2}, time.Minute)
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cache.Set("b", &SizedItem{0, 3}, time.Minute)
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time.Sleep(time.Millisecond * 5)
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checkSize(cache, 5)
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cache.Set("b", &SizedItem{0, 3}, time.Minute)
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time.Sleep(time.Millisecond * 5)
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checkSize(cache, 5)
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cache.Set("b", &SizedItem{0, 4}, time.Minute)
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time.Sleep(time.Millisecond * 5)
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checkSize(cache, 6)
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cache.Set("b", &SizedItem{0, 2}, time.Minute)
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time.Sleep(time.Millisecond * 5)
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checkSize(cache, 4)
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cache.Delete("b")
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time.Sleep(time.Millisecond * 100)
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checkSize(cache, 2)
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}
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func (_ CacheTests) ReplaceDoesNotchangeSizeIfNotSet() {
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cache := New(Configure())
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cache.Set("1", &SizedItem{1, 2}, time.Minute)
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cache.Set("2", &SizedItem{1, 2}, time.Minute)
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cache.Set("3", &SizedItem{1, 2}, time.Minute)
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cache.Replace("4", &SizedItem{1, 2})
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time.Sleep(time.Millisecond * 5)
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checkSize(cache, 6)
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}
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func (_ CacheTests) ReplaceChangesSize() {
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cache := New(Configure())
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cache.Set("1", &SizedItem{1, 2}, time.Minute)
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cache.Set("2", &SizedItem{1, 2}, time.Minute)
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cache.Replace("2", &SizedItem{1, 2})
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time.Sleep(time.Millisecond * 5)
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checkSize(cache, 4)
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cache.Replace("2", &SizedItem{1, 1})
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time.Sleep(time.Millisecond * 5)
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checkSize(cache, 3)
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cache.Replace("2", &SizedItem{1, 3})
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time.Sleep(time.Millisecond * 5)
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checkSize(cache, 5)
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}
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func (_ CacheTests) ResizeOnTheFly() {
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cache := New(Configure().MaxSize(9).ItemsToPrune(1))
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for i := 0; i < 5; i++ {
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cache.Set(strconv.Itoa(i), i, time.Minute)
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}
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cache.SetMaxSize(3)
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time.Sleep(time.Millisecond * 10)
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Expect(cache.GetDropped()).To.Equal(2)
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Expect(cache.Get("0")).To.Equal(nil)
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Expect(cache.Get("1")).To.Equal(nil)
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Expect(cache.Get("2").Value()).To.Equal(2)
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Expect(cache.Get("3").Value()).To.Equal(3)
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Expect(cache.Get("4").Value()).To.Equal(4)
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cache.Set("5", 5, time.Minute)
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time.Sleep(time.Millisecond * 5)
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Expect(cache.GetDropped()).To.Equal(1)
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Expect(cache.Get("2")).To.Equal(nil)
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Expect(cache.Get("3").Value()).To.Equal(3)
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Expect(cache.Get("4").Value()).To.Equal(4)
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Expect(cache.Get("5").Value()).To.Equal(5)
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cache.SetMaxSize(10)
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cache.Set("6", 6, time.Minute)
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time.Sleep(time.Millisecond * 10)
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Expect(cache.GetDropped()).To.Equal(0)
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Expect(cache.Get("3").Value()).To.Equal(3)
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Expect(cache.Get("4").Value()).To.Equal(4)
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Expect(cache.Get("5").Value()).To.Equal(5)
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Expect(cache.Get("6").Value()).To.Equal(6)
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}
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type SizedItem struct {
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id int
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s int64
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}
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func (s *SizedItem) Size() int64 {
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return s.s
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}
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func checkSize(cache *Cache, sz int64) {
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cache.Stop()
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Expect(cache.size).To.Equal(sz)
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cache.restart()
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}
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func gcCache(cache *Cache) {
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cache.Stop()
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cache.gc()
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cache.restart()
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}
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