package protocol

import "testing"

func TestRCFrameRoundTrip(t *testing.T) {
	input := RCFrame{Sequence: 42, Timestamp: 123456}
	for i := range input.Channels {
		input.Channels[i] = int16(i*100 - 750)
	}

	got, err := DecodeRC(EncodeRC(input))
	if err != nil {
		t.Fatal(err)
	}
	if got != input {
		t.Fatalf("round trip mismatch: got %#v want %#v", got, input)
	}
}

func TestRCFrameRejectsBadCRC(t *testing.T) {
	packet := EncodeRC(RCFrame{})
	packet[Header] ^= 1
	if _, err := DecodeRC(packet); err == nil {
		t.Fatal("expected CRC error")
	}
}