func testCreateFile(target storage.Directory, path, referencePath string) error {
file, err := target.CreateFile(path)
if err != nil {
return errors.New(fmt.Sprintf("creating file failed: %v", err))
}
fileClosed := false
defer func() {
if !fileClosed {
if err := file.Close(); err != nil {
panic(err)
}
}
}()
bytesWritten, err := file.Write([]byte("Hello world"))
if err != nil {
return errors.New(fmt.Sprintf("failed to write to file: %v", err))
}
if bytesWritten != 11 {
return errors.New(fmt.Sprintf("failed to write the full buffer, wrote %d bytes", bytesWritten))
}
if actualPath := file.Entry().Path(); actualPath != referencePath {
return errors.New(fmt.Sprintf("new file has wrong path: expected %s, got %s", referencePath, actualPath))
}
err = file.Close()
if err != nil {
return errors.New(fmt.Sprintf("error closing newly created file: %v", err))
}
fileClosed = true
fileEntry, err := target.Stat(path)
if err != nil {
return errors.New(fmt.Sprintf("failed to stat newly created file: %v", err))
}
if actualPath := fileEntry.Path(); actualPath != referencePath {
return errors.New(fmt.Sprintf("new file has wrong path after statting: expected %s, got %s", referencePath, actualPath))
}
fileRO, err := fileEntry.(storage.FileEntry).Open()
if err != nil {
return errors.New(fmt.Sprintf("failed to opeen new file: %v", err))
}
defer func() {
if err := fileRO.Close(); err != nil {
panic(err)
}
}()
buffer := make([]byte, 20)
bytesRead, err := fileRO.Read(buffer)
if err != nil && err != io.EOF {
return errors.New(fmt.Sprintf("failed to read from newly created file: %v", err))
}
if bytesRead != 11 || string(buffer[:11]) != "Hello world" {
return errors.New(fmt.Sprintf("invalid contents in written file: %v", string(buffer[:bytesRead+2])))
}
return nil
}
