Add hex2pcap

internal/hexutil/hex_test.go

@@ -0,0 +1,44 @@
+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)
+		}
+	}
+}