package protocol

import "testing"

func TestEncodeDecodeRoundTrip(t *testing.T) {
	in := Frame{Version: 1, Command: CmdSendMessage, Flags: FlagCompress, RequestID: 9, SequenceID: 3, Body: []byte("hi")}
	raw, err := Encode(in)
	if err != nil {
		t.Fatal(err)
	}
	out, err := Decode(raw, 65536)
	if err != nil {
		t.Fatal(err)
	}
	if out.Command != in.Command || out.RequestID != in.RequestID || string(out.Body) != "hi" {
		t.Fatalf("round trip mismatch: %+v", out)
	}
}

func TestDecodeRejectsBadMagic(t *testing.T) {
	raw, _ := Encode(Frame{Body: []byte("x")})
	raw[0] = 0
	if _, err := Decode(raw, 65536); err == nil {
		t.Fatal("expected invalid frame")
	}
}