feat(transcode): add a generic transcoding package for encoding/decoding/caching

server/ctrlsubsonic/httprange/httprange_test.go

@@ -0,0 +1,30 @@
+package httprange_test
+
+import (
+	"testing"
+
+	"github.com/matryer/is"
+	"go.senan.xyz/gonic/server/ctrlsubsonic/httprange"
+)
+
+func TestParse(t *testing.T) {
+	is := is.New(t)
+
+	full := func(start, end, length int) httprange.Range {
+		return httprange.Range{Start: start, End: end, Length: length}
+	}
+	partial := func(start, end, length int) httprange.Range {
+		return httprange.Range{Start: start, End: end, Length: length, Partial: true}
+	}
+	parse := func(in string, length int) httprange.Range {
+		is.Helper()
+		rrange, err := httprange.Parse(in, length)
+		is.NoErr(err)
+		return rrange
+	}
+
+	is.Equal(parse("bytes=0-0", 0), full(0, 0, 0))
+	is.Equal(parse("bytes=0-", 10), full(0, 9, 10))
+	is.Equal(parse("bytes=0-49", 50), partial(0, 49, 50))
+	is.Equal(parse("bytes=50-99", 100), partial(50, 99, 50))
+}