refactor: move shared packages up a level

transcode/transcode_test.go

@@ -0,0 +1,47 @@
+//go:build go1.18
+// +build go1.18
+
+package transcode_test
+
+import (
+	"context"
+	"io"
+	"testing"
+	"time"
+
+	"github.com/matryer/is"
+	"go.senan.xyz/gonic/transcode"
+)
+
+// FuzzGuessExpectedSize makes sure all of our profile's estimated transcode
+// file sizes are slightly bigger than the real thing.
+func FuzzGuessExpectedSize(f *testing.F) {
+	var profiles []transcode.Profile
+	for _, v := range transcode.UserProfiles {
+		profiles = append(profiles, v)
+	}
+
+	type track struct {
+		path   string
+		length time.Duration
+	}
+	var tracks []track
+	tracks = append(tracks, track{"testdata/5s.mp3", 5 * time.Second})
+	tracks = append(tracks, track{"testdata/10s.mp3", 10 * time.Second})
+
+	tr := transcode.NewFFmpegTranscoder()
+	f.Fuzz(func(t *testing.T, pseed uint8, tseed uint8) {
+		is := is.New(t)
+		profile := profiles[int(pseed)%len(profiles)]
+		track := tracks[int(tseed)%len(tracks)]
+
+		sizeGuess := transcode.GuessExpectedSize(profile, track.length)
+
+		reader, err := tr.Transcode(context.Background(), profile, track.path)
+		is.NoErr(err)
+
+		actual, err := io.ReadAll(reader)
+		is.NoErr(err)
+		is.True(sizeGuess > len(actual))
+	})
+}