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warmcache_test.go
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warmcache_test.go
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package warmcache
import (
"errors"
"fmt"
"reflect"
"regexp"
"sync/atomic"
"testing"
"time"
)
func TestCacheMgr(t *testing.T) {
var counter int32
tests := []struct {
inputInterval time.Duration
inputCacheFunc FetchCacheFunc
inputElapsedChan chan time.Duration
wantElapsedMsg string
wantCacheData interface{}
wantCacheData2 interface{}
wantIsStale bool
wantIsErr bool
wantIsErr2 bool
}{
{
inputInterval: 1 * time.Second,
inputCacheFunc: func() (interface{}, error) {
time.Sleep(500 * time.Millisecond)
atomic.AddInt32(&counter, 1)
return atomic.LoadInt32(&counter), nil
},
inputElapsedChan: make(chan time.Duration),
wantElapsedMsg: `50.*ms`,
wantCacheData: int32(1),
wantCacheData2: int32(2),
wantIsStale: false,
wantIsErr: false,
wantIsErr2: false,
},
{
inputInterval: 1 * time.Second,
inputCacheFunc: func() (interface{}, error) {
if atomic.LoadInt32(&counter) == 0 {
atomic.AddInt32(&counter, 1)
return atomic.LoadInt32(&counter), nil
}
return nil, errors.New("failed to fetch a cache")
},
inputElapsedChan: make(chan time.Duration),
wantElapsedMsg: `.*µs`,
wantCacheData: int32(1),
wantCacheData2: int32(1),
wantIsStale: false,
wantIsErr: false,
wantIsErr2: true,
},
{
inputInterval: 1 * time.Second,
inputCacheFunc: func() (interface{}, error) {
time.Sleep(500 * time.Millisecond)
atomic.AddInt32(&counter, 1)
return []string{"hoge", fmt.Sprintf("fuga%d", atomic.LoadInt32(&counter))}, nil
},
inputElapsedChan: make(chan time.Duration),
wantElapsedMsg: `50.*ms`,
wantCacheData: []string{"hoge", "fuga1"},
wantCacheData2: []string{"hoge", "fuga2"},
wantIsStale: false,
wantIsErr: false,
wantIsErr2: false,
},
}
for _, test := range tests {
atomic.StoreInt32(&counter, 0)
c, err := NewCacheMgr(test.inputCacheFunc, test.inputInterval, test.inputElapsedChan)
if err != nil {
t.Fatalf(`failed to NewCacheMgr: err="%v"`, err)
}
// first get
data, isStale, err := c.CacheData()
if isStale != test.wantIsStale {
t.Errorf(`got %v, but want %v`, isStale, test.wantIsStale)
}
if test.wantIsErr && err == nil {
t.Errorf(`should be err`)
}
if !test.wantIsErr && err != nil {
t.Errorf(`should be not err, but got %s`, err)
}
if !reflect.DeepEqual(data, test.wantCacheData) {
t.Errorf(`got %v, but want %v`, data, test.wantCacheData)
}
// second get
msg := fmt.Sprintf("%v", <-test.inputElapsedChan)
if !regexp.MustCompile(test.wantElapsedMsg).Match([]byte(msg)) {
t.Errorf(`got %s, but want %s`, msg, test.wantElapsedMsg)
}
time.Sleep(test.inputInterval * 2)
data, isStale, err = c.CacheData()
if isStale != test.wantIsStale {
t.Errorf(`should be not stale`)
}
if test.wantIsErr2 && err == nil {
t.Errorf(`should be err`)
}
if !test.wantIsErr2 && err != nil {
t.Errorf(`should be not err, but got %s`, err)
}
if !reflect.DeepEqual(data, test.wantCacheData2) {
t.Errorf(`got %v, but want %v`, data, test.wantCacheData2)
}
c.Stop()
}
}