func TestUnsynchTextFrame_RoundTrip(t *testing.T) {
var (
err error
tempfile *os.File
f *File
tagger *v2.Tag
ft v2.FrameType
utextFrame *v2.UnsynchTextFrame
parsedFrame v2.Framer
resultFrame *v2.UnsynchTextFrame
ok bool
expected, actual string
)
tempfile, err = ioutil.TempFile("", "id3v2")
if err != nil {
t.Fatal(err)
}
tagger = v2.NewTag(3)
ft = v2.V23FrameTypeMap["COMM"]
utextFrame = v2.NewUnsynchTextFrame(ft, "Comment", "Foo")
tagger.AddFrames(utextFrame)
_, err = tempfile.Write(tagger.Bytes())
tempfile.Close()
if err != nil {
t.Fatal(err)
}
f, err = Open(tempfile.Name())
if err != nil {
t.Fatal(err)
}
parsedFrame = f.Frame("COMM")
if resultFrame, ok = parsedFrame.(*v2.UnsynchTextFrame); !ok {
t.Error("Couldn't cast frame")
} else {
expected = utextFrame.Description()
actual = resultFrame.Description()
if expected != actual {
t.Errorf("Expected %q, got %q", expected, actual)
}
}
}
// Opens a new tagged file
func Open(name string) (*File, error) {
fi, err := os.OpenFile(name, os.O_RDWR, 0666)
if err != nil {
return nil, err
}
file := &File{file: fi}
if v2Tag := v2.ParseTag(fi); v2Tag != nil {
file.Tagger = v2Tag
file.originalSize = v2Tag.Size()
} else if v1Tag := v1.ParseTag(fi); v1Tag != nil {
file.Tagger = v1Tag
} else {
// Add a new tag if none exists
file.Tagger = v2.NewTag(LatestVersion)
}
return file, nil
}