129 lines
3.7 KiB
Go
129 lines
3.7 KiB
Go
// Copyright 2014 beego Author. All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package cache
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import (
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"context"
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"fmt"
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"math/rand"
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"strings"
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"testing"
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"time"
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"github.com/stretchr/testify/assert"
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)
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func TestRandomExpireCache(t *testing.T) {
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bm, err := NewCache("memory", `{"interval":20}`)
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assert.Nil(t, err)
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cache := NewRandomExpireCache(bm)
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// should not be nil
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assert.NotNil(t, cache.(*RandomExpireCache).offset)
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timeoutDuration := 3 * time.Second
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if err = cache.Put(context.Background(), "Leon Ding", 22, timeoutDuration); err != nil {
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t.Error("set Error", err)
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}
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// testing random expire cache
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time.Sleep(timeoutDuration + 3 + time.Second)
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if res, _ := cache.IsExist(context.Background(), "Leon Ding"); !res {
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t.Error("check err")
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}
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if v, _ := cache.Get(context.Background(), "Leon Ding"); v.(int) != 22 {
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t.Error("get err")
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}
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assert.Nil(t, cache.Delete(context.Background(), "Leon Ding"))
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res, _ := cache.IsExist(context.Background(), "Leon Ding")
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assert.False(t, res)
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assert.Nil(t, cache.Put(context.Background(), "Leon Ding", "author", timeoutDuration))
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assert.Nil(t, cache.Delete(context.Background(), "astaxie"))
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res, _ = cache.IsExist(context.Background(), "astaxie")
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assert.False(t, res)
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assert.Nil(t, cache.Put(context.Background(), "astaxie", "author", timeoutDuration))
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res, _ = cache.IsExist(context.Background(), "astaxie")
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assert.True(t, res)
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v, _ := cache.Get(context.Background(), "astaxie")
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assert.Equal(t, "author", v)
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assert.Nil(t, cache.Put(context.Background(), "astaxie1", "author1", timeoutDuration))
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res, _ = cache.IsExist(context.Background(), "astaxie1")
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assert.True(t, res)
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vv, _ := cache.GetMulti(context.Background(), []string{"astaxie", "astaxie1"})
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assert.Equal(t, 2, len(vv))
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assert.Equal(t, "author", vv[0])
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assert.Equal(t, "author1", vv[1])
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vv, err = cache.GetMulti(context.Background(), []string{"astaxie0", "astaxie1"})
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assert.Equal(t, 2, len(vv))
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assert.Nil(t, vv[0])
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assert.Equal(t, "author1", vv[1])
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assert.NotNil(t, err)
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assert.True(t, strings.Contains(err.Error(), "key isn't exist"))
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}
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func TestWithRandomExpireOffsetFunc(t *testing.T) {
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bm, err := NewCache("memory", `{"interval":20}`)
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assert.Nil(t, err)
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magic := -time.Duration(rand.Int())
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cache := NewRandomExpireCache(bm, WithRandomExpireOffsetFunc(func() time.Duration {
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return magic
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}))
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// offset should return the magic value
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assert.Equal(t, magic, cache.(*RandomExpireCache).offset())
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}
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func ExampleNewRandomExpireCache() {
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mc := NewMemoryCache()
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// use the default strategy which will generate random time offset (range: [3s,8s)) expired
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c := NewRandomExpireCache(mc)
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// so the expiration will be [1m3s, 1m8s)
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err := c.Put(context.Background(), "hello", "world", time.Minute)
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if err != nil {
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panic(err)
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}
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c = NewRandomExpireCache(mc,
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// based on the expiration
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WithRandomExpireOffsetFunc(func() time.Duration {
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val := rand.Int31n(100)
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fmt.Printf("calculate offset")
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return time.Duration(val) * time.Second
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}))
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// so the expiration will be [1m0s, 1m100s)
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err = c.Put(context.Background(), "hello", "world", time.Minute)
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if err != nil {
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panic(err)
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}
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// Output:
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// calculate offset
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}
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