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rwmanager_mmap_test.go
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rwmanager_mmap_test.go
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// Copyright 2019 The nutsdb Author. All rights reserved.
//
// 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 nutsdb
import (
"os"
"testing"
"github.com/stretchr/testify/require"
"github.com/xujiajun/mmap-go"
)
func TestRWManager_MMap_Release(t *testing.T) {
filePath := "/tmp/foo_rw_MMap"
fdm := newFileManager(MMap, 1024, 0.5, 256*MB)
rwmanager, err := fdm.getMMapRWManager(filePath, 1024, 256*MB)
if err != nil {
t.Error("err TestRWManager_MMap_Release getMMapRWManager")
}
b := []byte("hello")
off := int64(0)
_, err = rwmanager.WriteAt(b, off)
if err != nil {
t.Error("err TestRWManager_MMap_Release WriteAt")
}
if !rwmanager.IsActive() {
t.Error("err TestRWManager_MMap_Release FdInfo:using not correct")
}
err = rwmanager.Release()
if err != nil {
t.Error("err TestRWManager_MMap_Release Release")
}
if rwmanager.IsActive() {
t.Error("err TestRWManager_MMap_Release Release Failed")
}
}
func (rwmanager *MMapRWManager) IsActive() bool {
return rwmanager.fdm.cache[rwmanager.path].using != 0
}
func TestRWManager_MMap_WriteAt(t *testing.T) {
filePath := "/tmp/foo_rw_filemmap"
maxFdNums := 1024
cleanThreshold := 0.5
var fdm = newFdm(maxFdNums, cleanThreshold)
fd, err := fdm.getFd(filePath)
if err != nil {
require.NoError(t, err)
}
defer os.Remove(fd.Name())
err = Truncate(filePath, 1024, fd)
if err != nil {
require.NoError(t, err)
}
m, err := mmap.Map(fd, mmap.RDWR, 0)
if err != nil {
require.NoError(t, err)
}
mmManager := &MMapRWManager{filePath, fdm, m, 256 * MB}
b := []byte("test write at")
off := int64(3)
n, err := mmManager.WriteAt(b, off)
if err != nil {
require.NoError(t, err)
}
require.Equal(t, len(b), n)
require.Equal(t, append([]byte{0, 0, 0}, b...), []byte(m[:off+int64(len(b))]))
}
func TestRWManager_MMap_Sync(t *testing.T) {
filePath := "/tmp/foo_rw_filemmap"
maxFdNums := 1024
cleanThreshold := 0.5
var fdm = newFdm(maxFdNums, cleanThreshold)
fd, err := fdm.getFd(filePath)
if err != nil {
require.NoError(t, err)
}
defer os.Remove(fd.Name())
err = Truncate(filePath, 1024, fd)
if err != nil {
require.NoError(t, err)
}
m, err := mmap.Map(fd, mmap.RDWR, 0)
if err != nil {
require.NoError(t, err)
}
mmManager := &MMapRWManager{filePath, fdm, m, 256 * MB}
m[1] = 'z'
err = mmManager.Sync()
require.NoError(t, err)
fileContents, err := os.ReadFile(filePath)
require.NoError(t, err)
require.Equal(t, fileContents, []byte(m[:]))
}
func TestRWManager_MMap_Close(t *testing.T) {
filePath := "/tmp/foo_rw_filemmap"
maxFdNums := 1024
cleanThreshold := 0.5
var fdm = newFdm(maxFdNums, cleanThreshold)
fd, err := fdm.getFd(filePath)
if err != nil {
require.NoError(t, err)
}
defer os.Remove(fd.Name())
err = Truncate(filePath, 1024, fd)
if err != nil {
require.NoError(t, err)
}
m, err := mmap.Map(fd, mmap.RDWR, 0)
if err != nil {
require.NoError(t, err)
}
mmManager := &MMapRWManager{filePath, fdm, m, 256 * MB}
err = mmManager.Close()
err = isFileDescriptorClosed(fd.Fd())
if err == nil {
t.Error("expected file descriptor to be closed, but it's still open")
}
}
func isFileDescriptorClosed(fd uintptr) error {
file := os.NewFile(fd, "")
defer file.Close()
_, err := file.Stat()
return err
}