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package fastcache
import (
"fmt"
"io/ioutil"
"os"
"path/filepath"
"sync"
"testing"
)
func TestSaveLoadSmall(t *testing.T) {
tmpDir, err := ioutil.TempDir("", "test")
if err != nil {
t.Fatal(err)
}
filePath := filepath.Join(tmpDir, "TestSaveLoadSmall.fastcache")
defer os.RemoveAll(filePath)
c := New(1)
defer c.Reset()
key := []byte("foobar")
value := []byte("abcdef")
c.Set(key, value)
if err := c.SaveToFile(filePath); err != nil {
t.Fatalf("SaveToFile error: %s", err)
}
c1, err := LoadFromFile(filePath)
if err != nil {
t.Fatalf("LoadFromFile error: %s", err)
}
vv := c1.Get(nil, key)
if string(vv) != string(value) {
t.Fatalf("unexpected value obtained from cache; got %q; want %q", vv, value)
}
// Verify that key can be overwritten.
newValue := []byte("234fdfd")
c1.Set(key, newValue)
vv = c1.Get(nil, key)
if string(vv) != string(newValue) {
t.Fatalf("unexpected new value obtained from cache; got %q; want %q", vv, newValue)
}
}
func TestSaveLoadFile(t *testing.T) {
for _, concurrency := range []int{0, 1, 2, 4, 10} {
t.Run(fmt.Sprintf("concurrency_%d", concurrency), func(t *testing.T) {
testSaveLoadFile(t, concurrency)
})
}
}
func testSaveLoadFile(t *testing.T, concurrency int) {
var s Stats
tmpDir, err := ioutil.TempDir("", "test")
if err != nil {
t.Fatal(err)
}
filePath := filepath.Join(tmpDir, fmt.Sprintf("TestSaveLoadFile.%d.fastcache", concurrency))
defer os.RemoveAll(filePath)
const itemsCount = 10000
const maxBytes = bucketsCount * chunkSize * 2
c := New(maxBytes)
for i := 0; i < itemsCount; i++ {
k := []byte(fmt.Sprintf("key %d", i))
v := []byte(fmt.Sprintf("value %d", i))
c.Set(k, v)
vv := c.Get(nil, k)
if string(v) != string(vv) {
t.Fatalf("unexpected cache value for k=%q; got %q; want %q; bucket[0]=%#v", k, vv, v, &c.buckets[0])
}
}
if concurrency == 1 {
if err := c.SaveToFile(filePath); err != nil {
t.Fatalf("SaveToFile error: %s", err)
}
} else {
if err := c.SaveToFileConcurrent(filePath, concurrency); err != nil {
t.Fatalf("SaveToFileConcurrent(%d) error: %s", concurrency, err)
}
}
s.Reset()
c.UpdateStats(&s)
if s.EntriesCount != itemsCount {
t.Fatalf("unexpected entriesCount; got %d; want %d", s.EntriesCount, itemsCount)
}
c.Reset()
// Verify LoadFromFile
c, err = LoadFromFile(filePath)
if err != nil {
t.Fatalf("unexpected error: %s", err)
}
s.Reset()
c.UpdateStats(&s)
if s.EntriesCount != itemsCount {
t.Fatalf("unexpected entriesCount; got %d; want %d", s.EntriesCount, itemsCount)
}
for i := 0; i < itemsCount; i++ {
k := []byte(fmt.Sprintf("key %d", i))
v := []byte(fmt.Sprintf("value %d", i))
vv := c.Get(nil, k)
if string(v) != string(vv) {
t.Fatalf("unexpected cache value for k=%q; got %q; want %q; bucket[0]=%#v", k, vv, v, &c.buckets[0])
}
}
c.Reset()
// Verify LoadFromFileOrNew
c = LoadFromFileOrNew(filePath, maxBytes)
s.Reset()
c.UpdateStats(&s)
if s.EntriesCount != itemsCount {
t.Fatalf("unexpected entriesCount; got %d; want %d", s.EntriesCount, itemsCount)
}
for i := 0; i < itemsCount; i++ {
k := []byte(fmt.Sprintf("key %d", i))
v := []byte(fmt.Sprintf("value %d", i))
vv := c.Get(nil, k)
if string(v) != string(vv) {
t.Fatalf("unexpected cache value for k=%q; got %q; want %q; bucket[0]=%#v", k, vv, v, &c.buckets[0])
}
}
c.Reset()
// Overwrite existing keys
for i := 0; i < itemsCount; i++ {
k := []byte(fmt.Sprintf("key %d", i))
v := []byte(fmt.Sprintf("value %d", i))
c.Set(k, v)
vv := c.Get(nil, k)
if string(v) != string(vv) {
t.Fatalf("unexpected cache value for k=%q; got %q; want %q; bucket[0]=%#v", k, vv, v, &c.buckets[0])
}
}
// Add new keys
for i := 0; i < itemsCount; i++ {
k := []byte(fmt.Sprintf("new key %d", i))
v := []byte(fmt.Sprintf("new value %d", i))
c.Set(k, v)
vv := c.Get(nil, k)
if string(v) != string(vv) {
t.Fatalf("unexpected cache value for k=%q; got %q; want %q; bucket[0]=%#v", k, vv, v, &c.buckets[0])
}
}
// Verify all the keys exist
for i := 0; i < itemsCount; i++ {
k := []byte(fmt.Sprintf("key %d", i))
v := []byte(fmt.Sprintf("value %d", i))
vv := c.Get(nil, k)
if string(v) != string(vv) {
t.Fatalf("unexpected cache value for k=%q; got %q; want %q; bucket[0]=%#v", k, vv, v, &c.buckets[0])
}
k = []byte(fmt.Sprintf("new key %d", i))
v = []byte(fmt.Sprintf("new value %d", i))
vv = c.Get(nil, k)
if string(v) != string(vv) {
t.Fatalf("unexpected cache value for k=%q; got %q; want %q; bucket[0]=%#v", k, vv, v, &c.buckets[0])
}
}
// Verify incorrect maxBytes passed to LoadFromFileOrNew
c = LoadFromFileOrNew(filePath, maxBytes*10)
s.Reset()
c.UpdateStats(&s)
if s.EntriesCount != 0 {
t.Fatalf("unexpected non-zero entriesCount; got %d", s.EntriesCount)
}
c.Reset()
}
func TestSaveLoadConcurrent(t *testing.T) {
c := New(1024)
defer c.Reset()
c.Set([]byte("foo"), []byte("bar"))
stopCh := make(chan struct{})
// Start concurrent workers that run Get and Set on c.
var wgWorkers sync.WaitGroup
for i := 0; i < 5; i++ {
wgWorkers.Add(1)
go func() {
defer wgWorkers.Done()
var buf []byte
j := 0
for {
k := []byte(fmt.Sprintf("key %d", j))
v := []byte(fmt.Sprintf("value %d", j))
c.Set(k, v)
buf = c.Get(buf[:0], k)
if string(buf) != string(v) {
panic(fmt.Errorf("unexpected value for key %q; got %q; want %q", k, buf, v))
}
j++
select {
case <-stopCh:
return
default:
}
}
}()
}
// Start concurrent SaveToFile and LoadFromFile calls.
tmpDir, err := ioutil.TempDir("", "test")
if err != nil {
t.Fatal(err)
}
defer os.RemoveAll(tmpDir)
var wgSavers sync.WaitGroup
for i := 0; i < 4; i++ {
wgSavers.Add(1)
filePath := filepath.Join(tmpDir, fmt.Sprintf("TestSaveLoadFile.%d.fastcache", i))
go func() {
defer wgSavers.Done()
defer os.RemoveAll(filePath)
for j := 0; j < 3; j++ {
if err := c.SaveToFileConcurrent(filePath, 3); err != nil {
panic(fmt.Errorf("cannot save cache to %q: %s", filePath, err))
}
cc, err := LoadFromFile(filePath)
if err != nil {
panic(fmt.Errorf("cannot load cache from %q: %s", filePath, err))
}
var s Stats
cc.UpdateStats(&s)
if s.EntriesCount == 0 {
panic(fmt.Errorf("unexpected empty cache loaded from %q", filePath))
}
cc.Reset()
}
}()
}
wgSavers.Wait()
close(stopCh)
wgWorkers.Wait()
}
|
