func writer(t *testing.T, tname string, w io.Writer, atype string) archive.WriteCloser {
switch atype {
case gzipType:
return gzip.NewWriter(w)
case tarType:
return tar.NewWriter(w)
case zipType:
return zip.NewWriter(w)
}
t.Fatalf("%s: unrecognized archive type: %s", tname, atype)
panic("execution continued after (*testing.T).Fatalf")
}
// writeFiles iterates through the files we want and writes them as a tarred
// file.
func writeFiles(t *testing.T, f *os.File, tname string, want []file) {
w := tar.NewWriter(f)
defer w.Close()
// Write zipped files
for _, fwant := range want {
fi := iotest.FileInfo(t, fwant.contents)
// Write the file
err := w.NextFile(fwant.name, fi)
switch err {
case io.EOF:
break
default:
t.Fatalf("%s: write header for next file: %v", tname, err)
case nil: // Proceed below
}
if _, err := io.Copy(w, bytes.NewReader(fwant.contents)); err != nil {
t.Fatalf("%s: copy to writer: %v", tname, err)
}
}
}