240 lines
6.8 KiB
Go
240 lines
6.8 KiB
Go
/*
|
|
* Minio Cloud Storage, (C) 2016 Minio, Inc.
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*
|
|
*/
|
|
|
|
package objcache
|
|
|
|
import (
|
|
"bytes"
|
|
"io"
|
|
"io/ioutil"
|
|
"testing"
|
|
"time"
|
|
)
|
|
|
|
// TestObjectCache tests cases of object cache with expiry.
|
|
func TestObjExpiry(t *testing.T) {
|
|
// Non exhaustive list of all object cache behavior cases.
|
|
testCases := []struct {
|
|
expiry time.Duration
|
|
cacheSize uint64
|
|
err error
|
|
closeErr error
|
|
}{
|
|
{
|
|
expiry: 100 * time.Millisecond,
|
|
cacheSize: 1024,
|
|
err: ErrKeyNotFoundInCache,
|
|
closeErr: nil,
|
|
},
|
|
}
|
|
|
|
// Test case 1 validates running of GC.
|
|
testCase := testCases[0]
|
|
cache := New(testCase.cacheSize, testCase.expiry)
|
|
cache.OnEviction = func(key string) {}
|
|
w, err := cache.Create("test", 1)
|
|
if err != nil {
|
|
t.Errorf("Test case 1 expected to pass, failed instead %s", err)
|
|
}
|
|
// Write a byte.
|
|
w.Write([]byte("1"))
|
|
if err = w.Close(); err != nil {
|
|
t.Errorf("Test case 1 expected to pass, failed instead %s", err)
|
|
}
|
|
// Wait for 500 millisecond.
|
|
time.Sleep(500 * time.Millisecond)
|
|
_, err = cache.Open("test")
|
|
if err != testCase.err {
|
|
t.Errorf("Test case 1 expected %s, got instead %s", testCase.err, err)
|
|
}
|
|
}
|
|
|
|
// TestObjCache - tests various cases for object cache behavior.
|
|
func TestObjCache(t *testing.T) {
|
|
// Non exhaustive list of all object cache behavior cases.
|
|
testCases := []struct {
|
|
expiry time.Duration
|
|
cacheSize uint64
|
|
err error
|
|
closeErr error
|
|
}{
|
|
// Validate if a key is not found in cache and Open fails.
|
|
{
|
|
expiry: NoExpiry,
|
|
cacheSize: 1024,
|
|
err: ErrKeyNotFoundInCache,
|
|
},
|
|
// Validate if cache indicates that it is full and Create fails.
|
|
{
|
|
expiry: NoExpiry,
|
|
cacheSize: 1,
|
|
err: ErrCacheFull,
|
|
},
|
|
// Validate if Create succeeds but Close fails to write to buffer.
|
|
{
|
|
expiry: NoExpiry,
|
|
cacheSize: 2,
|
|
closeErr: io.ErrShortBuffer,
|
|
},
|
|
// Validate that Create and Close succeed, making sure to update the cache.
|
|
{
|
|
expiry: NoExpiry,
|
|
cacheSize: 1024,
|
|
},
|
|
// Validate that Delete succeeds and Open fails with key not found in cache.
|
|
{
|
|
expiry: NoExpiry,
|
|
cacheSize: 1024,
|
|
err: ErrKeyNotFoundInCache,
|
|
},
|
|
// Validate OnEviction function is called upon entry delete.
|
|
{
|
|
expiry: NoExpiry,
|
|
cacheSize: 1024,
|
|
},
|
|
// Validate error excess data.
|
|
{
|
|
expiry: NoExpiry,
|
|
cacheSize: 5,
|
|
closeErr: ErrExcessData,
|
|
},
|
|
}
|
|
|
|
// Test 1 validating Open failure.
|
|
testCase := testCases[0]
|
|
cache := New(testCase.cacheSize, testCase.expiry)
|
|
_, err := cache.Open("test")
|
|
if testCase.err != err {
|
|
t.Errorf("Test case 2 expected to pass, failed instead %s", err)
|
|
}
|
|
|
|
// Test 2 validating Create failure.
|
|
testCase = testCases[1]
|
|
cache = New(testCase.cacheSize, testCase.expiry)
|
|
_, err = cache.Create("test", 2)
|
|
if testCase.err != err {
|
|
t.Errorf("Test case 2 expected to pass, failed instead %s", err)
|
|
}
|
|
|
|
// Test 3 validating Create succeeds and returns a writer.
|
|
// Subsequently we Close() without writing any data, to receive
|
|
// `io.ErrShortBuffer`
|
|
testCase = testCases[2]
|
|
cache = New(testCase.cacheSize, testCase.expiry)
|
|
w, err := cache.Create("test", 1)
|
|
if testCase.err != err {
|
|
t.Errorf("Test case 3 expected to pass, failed instead %s", err)
|
|
}
|
|
if err = w.Close(); err != testCase.closeErr {
|
|
t.Errorf("Test case 3 expected to pass, failed instead %s", err)
|
|
}
|
|
|
|
// Test 4 validates Create and Close succeeds successfully caching
|
|
// the writes.
|
|
testCase = testCases[3]
|
|
cache = New(testCase.cacheSize, testCase.expiry)
|
|
w, err = cache.Create("test", 5)
|
|
if testCase.err != err {
|
|
t.Errorf("Test case 4 expected to pass, failed instead %s", err)
|
|
}
|
|
// Write '5' bytes.
|
|
w.Write([]byte("Hello"))
|
|
// Close to successfully save into cache.
|
|
if err = w.Close(); err != nil {
|
|
t.Errorf("Test case 4 expected to pass, failed instead %s", err)
|
|
}
|
|
r, err := cache.Open("test")
|
|
if err != nil {
|
|
t.Errorf("Test case 4 expected to pass, failed instead %s", err)
|
|
}
|
|
// Reads everything stored for key "test".
|
|
cbytes, err := ioutil.ReadAll(r)
|
|
if err != nil {
|
|
t.Errorf("Test case 4 expected to pass, failed instead %s", err)
|
|
}
|
|
// Validate if read bytes match.
|
|
if !bytes.Equal(cbytes, []byte("Hello")) {
|
|
t.Errorf("Test case 4 expected to pass. wanted \"Hello\", got %s", string(cbytes))
|
|
}
|
|
|
|
// Test 5 validates Delete succeeds and Open fails with err
|
|
testCase = testCases[4]
|
|
cache = New(testCase.cacheSize, testCase.expiry)
|
|
w, err = cache.Create("test", 5)
|
|
if err != nil {
|
|
t.Errorf("Test case 5 expected to pass, failed instead %s", err)
|
|
}
|
|
// Write '5' bytes.
|
|
w.Write([]byte("Hello"))
|
|
// Close to successfully save into cache.
|
|
if err = w.Close(); err != nil {
|
|
t.Errorf("Test case 5 expected to pass, failed instead %s", err)
|
|
}
|
|
// Delete the cache entry.
|
|
cache.Delete("test")
|
|
_, err = cache.Open("test")
|
|
if testCase.err != err {
|
|
t.Errorf("Test case 5 expected to pass, failed instead %s", err)
|
|
}
|
|
|
|
// Test 6 validates OnEviction being called upon Delete is being invoked.
|
|
testCase = testCases[5]
|
|
cache = New(testCase.cacheSize, testCase.expiry)
|
|
w, err = cache.Create("test", 5)
|
|
if err != nil {
|
|
t.Errorf("Test case 6 expected to pass, failed instead %s", err)
|
|
}
|
|
// Write '5' bytes.
|
|
w.Write([]byte("Hello"))
|
|
// Close to successfully save into cache.
|
|
if err = w.Close(); err != nil {
|
|
t.Errorf("Test case 6 expected to pass, failed instead %s", err)
|
|
}
|
|
var deleteKey string
|
|
cache.OnEviction = func(key string) {
|
|
deleteKey = key
|
|
}
|
|
// Delete the cache entry.
|
|
cache.Delete("test")
|
|
if deleteKey != "test" {
|
|
t.Errorf("Test case 6 expected to pass, wanted \"test\", got %s", deleteKey)
|
|
}
|
|
|
|
// Test 7 validates rejecting requests when excess data is being saved.
|
|
testCase = testCases[6]
|
|
cache = New(testCase.cacheSize, testCase.expiry)
|
|
w, err = cache.Create("test1", 5)
|
|
if err != nil {
|
|
t.Errorf("Test case 7 expected to pass, failed instead %s", err)
|
|
}
|
|
// Write '5' bytes.
|
|
w.Write([]byte("Hello"))
|
|
// Close to successfully save into cache.
|
|
if err = w.Close(); err != nil {
|
|
t.Errorf("Test case 7 expected to pass, failed instead %s", err)
|
|
}
|
|
w, err = cache.Create("test2", 1)
|
|
if err != nil {
|
|
t.Errorf("Test case 7 expected to pass, failed instead %s", err)
|
|
}
|
|
// Write '1' byte.
|
|
w.Write([]byte("H"))
|
|
if err = w.Close(); err != testCase.closeErr {
|
|
t.Errorf("Test case 7 expected to fail, passed instead")
|
|
}
|
|
}
|