mirror of https://github.com/spf13/afero.git
142 lines
3.1 KiB
Go
142 lines
3.1 KiB
Go
package afero
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import (
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"io/ioutil"
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"os"
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"testing"
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"time"
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)
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func TestUnionCreateExisting(t *testing.T) {
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base := &MemMapFs{}
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roBase := &ReadOnlyFs{source: base}
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ufs := NewUnionFs(roBase, &MemMapFs{}, NewCoWUnionFs())
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base.MkdirAll("/home/test", 0777)
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fh, _ := base.Create("/home/test/file.txt")
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fh.WriteString("This is a test")
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fh.Close()
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fh, err := ufs.OpenFile("/home/test/file.txt", os.O_RDWR, 0666)
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if err != nil {
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t.Errorf("Failed to open file r/w: %s", err)
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}
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_, err = fh.Write([]byte("####"))
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if err != nil {
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t.Errorf("Failed to write file: %s", err)
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}
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fh.Seek(0, 0)
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data, err := ioutil.ReadAll(fh)
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if err != nil {
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t.Errorf("Failed to read file: %s", err)
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}
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if string(data) != "#### is a test" {
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t.Errorf("Got wrong data")
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}
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fh.Close()
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fh, _ = base.Open("/home/test/file.txt")
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data, err = ioutil.ReadAll(fh)
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if string(data) != "This is a test" {
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t.Errorf("Got wrong data in base file")
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}
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fh.Close()
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fh, err = ufs.Create("/home/test/file.txt")
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switch err {
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case nil:
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if fi, _ := fh.Stat(); fi.Size() != 0 {
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t.Errorf("Create did not truncate file")
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}
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fh.Close()
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default:
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t.Errorf("Create failed on existing file")
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}
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}
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func TestUnionMergeReaddir(t *testing.T) {
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base := &MemMapFs{}
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roBase := &ReadOnlyFs{source: base}
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ufs := NewUnionFs(roBase, &MemMapFs{}, NewCoWUnionFs())
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base.MkdirAll("/home/test", 0777)
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fh, _ := base.Create("/home/test/file.txt")
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fh.WriteString("This is a test")
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fh.Close()
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fh, _ = ufs.Create("/home/test/file2.txt")
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fh.WriteString("This is a test")
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fh.Close()
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fh, _ = ufs.Open("/home/test")
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files, err := fh.Readdirnames(-1)
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if err != nil {
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t.Errorf("Readdirnames failed")
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}
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if len(files) != 2 {
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t.Errorf("Got wrong number of files: %v", files)
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}
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}
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func TestUnionCacheWrite(t *testing.T) {
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base := &MemMapFs{}
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layer := &MemMapFs{}
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ufs := NewUnionFs(base, layer, NewCacheUnionFs(0))
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base.Mkdir("/data", 0777)
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fh, err := ufs.Create("/data/file.txt")
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if err != nil {
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t.Errorf("Failed to create file")
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}
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_, err = fh.Write([]byte("This is a test"))
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if err != nil {
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t.Errorf("Failed to write file")
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}
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fh.Seek(0, os.SEEK_SET)
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buf := make([]byte, 4)
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_, err = fh.Read(buf)
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fh.Write([]byte(" IS A"))
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fh.Close()
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baseData, _ := ReadFile(base, "/data/file.txt")
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layerData, _ := ReadFile(layer, "/data/file.txt")
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if string(baseData) != string(layerData) {
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t.Errorf("Different data: %s <=> %s", baseData, layerData)
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}
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}
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func TestUnionCacheExpire(t *testing.T) {
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base := &MemMapFs{}
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layer := &MemMapFs{}
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ufs := NewUnionFs(base, layer, NewCacheUnionFs(1*time.Second))
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base.Mkdir("/data", 0777)
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fh, err := ufs.Create("/data/file.txt")
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if err != nil {
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t.Errorf("Failed to create file")
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}
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_, err = fh.Write([]byte("This is a test"))
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if err != nil {
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t.Errorf("Failed to write file")
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}
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fh.Close()
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fh, _ = base.Create("/data/file.txt")
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// sleep some time, so we really get a different time.Now() on write...
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time.Sleep(2 * time.Second)
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fh.WriteString("Another test")
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fh.Close()
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data, _ := ReadFile(ufs, "/data/file.txt")
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if string(data) != "Another test" {
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t.Errorf("cache time failed: <%s>", data)
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}
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}
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