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path: root/format/pktline/encode_length_header_test.go
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package pktline_test

import (
	"errors"
	"testing"
	"codeberg.org/lindenii/furgit/format/pktline"
)

func TestEncodeLengthHeader(t *testing.T) {
	t.Parallel()

	var hdr [4]byte

	err := pktline.EncodeLengthHeader(&hdr, 4)
	if err != nil {
		t.Fatalf("unexpected error: %v", err)
	}

	if got := string(hdr[:]); got != "0004" {
		t.Fatalf("got %q, want %q", got, "0004")
	}

	err = pktline.EncodeLengthHeader(&hdr, pktline.LargePacketMax+1)
	if !errors.Is(err, pktline.ErrInvalidLength) {
		t.Fatalf("got err %v, want ErrInvalidLength", err)
	}
}