Add TFTP server name option (#92)

1 files changed, 60 insertions, 0 deletions

diff --git a/dhcpv4/option_tftp_server_name_test.go b/dhcpv4/option_tftp_server_name_test.go
new file mode 100644
index 0000000..caddf95
--- /dev/null
+++ b/dhcpv4/option_tftp_server_name_test.go
@@ -0,0 +1,60 @@
+package dhcpv4
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestOptTFTPServerNameCode(t *testing.T) {
+	opt := OptTFTPServerName{}
+	require.Equal(t, OptionTFTPServerName, opt.Code())
+}
+
+func TestOptTFTPServerNameToBytes(t *testing.T) {
+	opt := OptTFTPServerName{
+		TFTPServerName: []byte("linuxboot"),
+	}
+	data := opt.ToBytes()
+	expected := []byte{
+		66, // OptionTFTPServerName
+		9,  // length
+		'l', 'i', 'n', 'u', 'x', 'b', 'o', 'o', 't',
+	}
+	require.Equal(t, expected, data)
+}
+
+func TestParseOptTFTPServerName(t *testing.T) {
+	expected := []byte{
+		66, 9, 'l', 'i', 'n', 'u', 'x', 'b', 'o', 'o', 't',
+	}
+	opt, err := ParseOptTFTPServerName(expected)
+	require.NoError(t, err)
+	require.Equal(t, 9, opt.Length())
+	require.Equal(t, "linuxboot", string(opt.TFTPServerName))
+}
+
+func TestParseOptTFTPServerNameZeroLength(t *testing.T) {
+	expected := []byte{
+		66, 0,
+	}
+	_, err := ParseOptTFTPServerName(expected)
+	require.Error(t, err)
+}
+
+func TestParseOptTFTPServerNameInvalidLength(t *testing.T) {
+	expected := []byte{
+		66, 9, 'l', 'i', 'n', 'u', 'x', 'b',
+	}
+	_, err := ParseOptTFTPServerName(expected)
+	require.Error(t, err)
+}
+
+func TestParseOptTFTPServerNameShortLength(t *testing.T) {
+	expected := []byte{
+		66, 4, 'l', 'i', 'n', 'u', 'x',
+	}
+	opt, err := ParseOptTFTPServerName(expected)
+	require.NoError(t, err)
+	require.Equal(t, []byte("linu"), opt.TFTPServerName)
+}