package hexutil

import (
	"bytes"
	"testing"
)

func TestDecode(t *testing.T) {
	want := []byte{0x45, 0x00, 0x00, 0x3c}
	for _, in := range []string{
		"4500003c",
		"45 00 00 3c",
		"45:00:00:3C",
		"45-00-00-3c",
		"0x45, 0x00, 0x00, 0x3c",
		`\x45\x00\x00\x3c`,
		"4500\n003c\n",
		"  45\t00 00\r\n3c  ",
	} {
		got, err := Decode(in)
		if err != nil {
			t.Errorf("Decode(%q): %v", in, err)
			continue
		}
		if !bytes.Equal(got, want) {
			t.Errorf("Decode(%q) = %x, want %x", in, got, want)
		}
	}
}

func TestDecodeEmpty(t *testing.T) {
	got, err := Decode("  \n ")
	if err != nil || len(got) != 0 {
		t.Errorf("Decode(blank) = %x, %v", got, err)
	}
}

func TestDecodeErrors(t *testing.T) {
	for _, in := range []string{"450", "45 0g", "45 00 zz"} {
		if _, err := Decode(in); err == nil {
			t.Errorf("Decode(%q): expected error", in)
		}
	}
}