github.com/zhiqiangxu/util@v0.0.0-20230112053021-0a7aee056cd5/mapped/file_test.go (about)

     1  package mapped
     2  
     3  import (
     4  	"bytes"
     5  	"os"
     6  	"testing"
     7  
     8  	"gotest.tools/assert"
     9  )
    10  
    11  func TestFile(t *testing.T) {
    12  
    13  	fileName := "/tmp/test_file"
    14  	os.Remove(fileName)
    15  	f, err := CreateFile(fileName, 64000, false, nil)
    16  	assert.Assert(t, err == nil)
    17  
    18  	mtime, err := f.LastModified()
    19  	assert.Assert(t, err == nil)
    20  	mtime2, err := f.LastModified()
    21  	assert.Assert(t, err == nil && mtime2 == mtime)
    22  
    23  	wbytes := []byte("123")
    24  	n, err := f.Write(wbytes)
    25  	assert.Assert(t, err == nil && n == len(wbytes))
    26  
    27  	mtime2, err = f.LastModified()
    28  	assert.Assert(t, err == nil && mtime2 != mtime)
    29  
    30  	rbytes := make([]byte, len(wbytes))
    31  	n, err = f.Read(0, rbytes)
    32  	assert.Assert(t, err == nil && n == len(wbytes) && bytes.Equal(wbytes, rbytes))
    33  	err = f.Close()
    34  	assert.Assert(t, err == nil)
    35  
    36  	f, err = CreateFile(fileName, 64000, false, nil)
    37  	// 已经存在
    38  	assert.Assert(t, err != nil)
    39  	os.Remove(fileName)
    40  	// 已删除
    41  	f, err = OpenFile(fileName, 64000, os.O_RDWR, false, nil)
    42  	assert.Assert(t, err != nil)
    43  }