1 files changed, 65 insertions, 0 deletions
diff --git a/dhcpv4/option_router_test.go b/dhcpv4/option_router_test.go
new file mode 100644
index 0000000..f492c22
--- /dev/null
+++ b/dhcpv4/option_router_test.go
@@ -0,0 +1,65 @@
+package dhcpv4
+
+import (
+	"net"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestOptRoutersInterfaceMethods(t *testing.T) {
+	routers := []net.IP{
+		net.IPv4(192, 168, 0, 10),
+		net.IPv4(192, 168, 0, 20),
+	}
+	o := OptRouter{Routers: routers}
+	require.Equal(t, OptionRouter, o.Code(), "Code")
+	require.Equal(t, net.IPv4len*len(routers), o.Length(), "Length")
+	require.Equal(t, routers, o.Routers, "Routers")
+}
+
+func TestParseOptRouter(t *testing.T) {
+	data := []byte{
+		byte(OptionRouter),
+		8,               // Length
+		192, 168, 0, 10, // Router #1
+		192, 168, 0, 20, // Router #2
+	}
+	o, err := ParseOptRouter(data)
+	require.NoError(t, err)
+	routers := []net.IP{
+		net.IPv4(192, 168, 0, 10),
+		net.IPv4(192, 168, 0, 20),
+	}
+	require.Equal(t, &OptRouter{Routers: routers}, o)
+
+	// Short byte stream
+	data = []byte{byte(OptionRouter)}
+	_, err = ParseOptRouter(data)
+	require.Error(t, err, "should get error from short byte stream")
+
+	// Wrong code
+	data = []byte{54, 2, 1, 1}
+	_, err = ParseOptRouter(data)
+	require.Error(t, err, "should get error from wrong code")
+
+	// Bad length
+	data = []byte{byte(OptionRouter), 6, 1, 1, 1}
+	_, err = ParseOptRouter(data)
+	require.Error(t, err, "should get error from bad length")
+}
+
+func TestParseOptRouterNoRouters(t *testing.T) {
+	// RFC2132 requires that at least one Router IP is specified
+	data := []byte{
+		byte(OptionRouter),
+		0, // Length
+	}
+	_, err := ParseOptRouter(data)
+	require.Error(t, err)
+}
+
+func TestOptRouterString(t *testing.T) {
+	o := OptRouter{Routers: []net.IP{net.IPv4(192, 168, 0, 1), net.IPv4(192, 168, 0, 10)}}
+	require.Equal(t, "Routers -> 192.168.0.1, 192.168.0.10", o.String())
+}