diff --git a/proxy/socks/protocol/udp_test.go b/proxy/socks/protocol/udp_test.go
new file mode 100644
index 00000000..4e4afde7
--- /dev/null
+++ b/proxy/socks/protocol/udp_test.go
@@ -0,0 +1,35 @@
+package protocol
+
+import (
+	"testing"
+
+	"github.com/v2ray/v2ray-core/testing/unit"
+	"github.com/v2ray/v2ray-core/transport"
+)
+
+func TestSingleByteRequest(t *testing.T) {
+	assert := unit.Assert(t)
+
+	request, err := ReadUDPRequest(make([]byte, 1))
+	if request != nil {
+		t.Fail()
+	}
+	assert.Error(err).Equals(transport.CorruptedPacket)
+}
+
+func TestDomainAddressRequest(t *testing.T) {
+	assert := unit.Assert(t)
+
+	payload := make([]byte, 0, 1024)
+	payload = append(payload, 0, 0, 1, AddrTypeDomain, byte(len("v2ray.com")))
+	payload = append(payload, []byte("v2ray.com")...)
+	payload = append(payload, 0, 80)
+	payload = append(payload, []byte("Actual payload")...)
+
+	request, err := ReadUDPRequest(payload)
+	assert.Error(err).IsNil()
+
+	assert.Byte(request.Fragment).Equals(1)
+	assert.String(request.Address.String()).Equals("v2ray.com:80")
+	assert.Bytes(request.Data.Value).Equals([]byte("Actual payload"))
+}