1 files changed, 41 insertions, 0 deletions
diff --git a/dhcpv4/option_domain_name_test.go b/dhcpv4/option_domain_name_test.go
new file mode 100644
index 0000000..ab66e8b
--- /dev/null
+++ b/dhcpv4/option_domain_name_test.go
@@ -0,0 +1,41 @@
+package dhcpv4
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestOptDomainNameInterfaceMethods(t *testing.T) {
+	o := OptDomainName{DomainName: "foo"}
+	require.Equal(t, OptionDomainName, o.Code(), "Code")
+	require.Equal(t, 3, o.Length(), "Length")
+	require.Equal(t, []byte{byte(OptionDomainName), 3, 'f', 'o', 'o'}, o.ToBytes(), "ToBytes")
+}
+
+func TestParseOptDomainName(t *testing.T) {
+	data := []byte{byte(OptionDomainName), 4, 't', 'e', 's', 't'} // DISCOVER
+	o, err := ParseOptDomainName(data)
+	require.NoError(t, err)
+	require.Equal(t, &OptDomainName{DomainName: "test"}, o)
+
+	// Short byte stream
+	data = []byte{byte(OptionDomainName)}
+	_, err = ParseOptDomainName(data)
+	require.Error(t, err, "should get error from short byte stream")
+
+	// Wrong code
+	data = []byte{54, 2, 1, 1}
+	_, err = ParseOptDomainName(data)
+	require.Error(t, err, "should get error from wrong code")
+
+	// Bad length
+	data = []byte{byte(OptionDomainName), 6, 1, 1, 1}
+	_, err = ParseOptDomainName(data)
+	require.Error(t, err, "should get error from bad length")
+}
+
+func TestOptDomainNameString(t *testing.T) {
+	o := OptDomainName{DomainName: "testy test"}
+	require.Equal(t, "Domain Name -> testy test", o.String())
+}