Frame-by-frame IMQ with an outgoing filter; HTTP interceptor hook

Co-Authored-By: Claude Opus 5.5 <[email protected]>

internal/imq/frame_test.go

@@ -36,12 +36,12 @@ func TestReaderSplitsFrames(t *testing.T) {
 		}
 		got = append(got, frames...)
 	}
-	want := []Frame{{1302, 5}, {3103, 300}, {1301, 0}}
+	want := []Frame{{1302, 5, []byte("hello")}, {3103, 300, bytes.Repeat([]byte{1}, 300)}, {1301, 0, nil}}
 	if len(got) != len(want) {
 		t.Fatalf("got %v, want %v", got, want)
 	}
 	for i := range want {
-		if got[i] != want[i] {
+		if got[i].Type != want[i].Type || got[i].Size != want[i].Size || !bytes.Equal(got[i].Data, want[i].Data) {
 			t.Fatalf("got %v, want %v", got, want)
 		}
 	}
@@ -63,3 +63,21 @@ func TestTypeName(t *testing.T) {
 		t.Fatal(TypeName(3104), TypeName(7))
 	}
 }
+
+func TestSendMessageRoundTrip(t *testing.T) {
+	m := SendMessage{OpID: 300, Queue: "/chat/1", Mount: "messages", Message: []byte(`{"message": "*use 80 1"}`)}
+	data := m.Marshal()
+	got, err := ParseSendMessage(data)
+	if err != nil || got.OpID != 300 || got.Queue != "/chat/1" || got.Mount != "messages" || string(got.Message) != string(m.Message) {
+		t.Fatalf("%+v %v", got, err)
+	}
+	// A frame of it reads back as one frame with the same data.
+	var r Reader
+	frames, err := r.Write(EncodeFrame(C2gSendMessage, data))
+	if err != nil || len(frames) != 1 || frames[0].Type != C2gSendMessage || !bytes.Equal(frames[0].Data, data) {
+		t.Fatalf("%v %v", frames, err)
+	}
+	if _, err := ParseSendMessage(Result(1, 0)); err == nil {
+		t.Fatal("a G2cResult parsed as a C2gSendMessage")
+	}
+}