frame: Add test cases. Currently 1/3 is failing the MD5 checksum test.

frame/frame_test.go

@@ -0,0 +1,59 @@
+package frame_test
+
+import (
+	"bytes"
+	"crypto/md5"
+	"io"
+	"testing"
+
+	"gopkg.in/mewkiz/flac.v1"
+)
+
+var golden = []struct {
+	name string
+}{
+	// i=0
+	{
+		name: "../testdata/59996.flac",
+	},
+
+	// i=1
+	{
+		name: "../testdata/172960.flac",
+	},
+
+	// i=2
+	{
+		name: "../testdata/189983.flac",
+	},
+}
+
+func TestFrameHash(t *testing.T) {
+	for i, g := range golden {
+		stream, err := flac.ParseFile(g.name)
+		if err != nil {
+			t.Fatal(err)
+		}
+		defer stream.Close()
+
+		md5sum := md5.New()
+		for frameNum := 0; ; frameNum++ {
+			frame, err := stream.ParseNext()
+			if err != nil {
+				if err == io.EOF {
+					break
+				}
+				t.Errorf("i=%d, frameNum=%d: error while parsing frame; %v", i, frameNum, err)
+				continue
+			}
+			frame.Hash(md5sum)
+		}
+		want := stream.Info.MD5sum[:]
+		got := md5sum.Sum(nil)
+		// Verify the decoded audio samples by comparing the MD5 checksum that is
+		// stored in StreamInfo with the computed one.
+		if !bytes.Equal(got, want) {
+			t.Errorf("i=%d: MD5 checksum mismatch for decoded audio samples; expected %32x, got %32x", i, want, got)
+		}
+	}
+}