add implementation for SentPacket in OutgoingPacketAckHandler

ackhandler/outgoing_packet_ack_handler_test.go

@@ -0,0 +1,40 @@
+package ackhandler
+
+import (
+	. "github.com/onsi/ginkgo"
+	. "github.com/onsi/gomega"
+)
+
+var _ = Describe("AckHandler", func() {
+	Context("SentPacket", func() {
+		It("accepts two consecutive packets", func() {
+			packet1 := Packet{PacketNumber: 1, Plaintext: []byte{0x13, 0x37}, EntropyBit: true}
+			packet2 := Packet{PacketNumber: 2, Plaintext: []byte{0xBE, 0xEF}, EntropyBit: false}
+			handler := NewOutgoingPacketAckHandler()
+			err := handler.SentPacket(&packet1)
+			Expect(err).ToNot(HaveOccurred())
+			err = handler.SentPacket(&packet2)
+			Expect(err).ToNot(HaveOccurred())
+		})
+
+		It("rejects two packets with the same packet number", func() {
+			packet1 := Packet{PacketNumber: 1, Plaintext: []byte{0x13, 0x37}, EntropyBit: true}
+			packet2 := Packet{PacketNumber: 1, Plaintext: []byte{0xBE, 0xEF}, EntropyBit: false}
+			handler := NewOutgoingPacketAckHandler()
+			err := handler.SentPacket(&packet1)
+			Expect(err).ToNot(HaveOccurred())
+			err = handler.SentPacket(&packet2)
+			Expect(err).To(HaveOccurred())
+		})
+
+		It("rejects non-consecutive packets", func() {
+			packet1 := Packet{PacketNumber: 1, Plaintext: []byte{0x13, 0x37}, EntropyBit: true}
+			packet2 := Packet{PacketNumber: 3, Plaintext: []byte{0xBE, 0xEF}, EntropyBit: false}
+			handler := NewOutgoingPacketAckHandler()
+			err := handler.SentPacket(&packet1)
+			Expect(err).ToNot(HaveOccurred())
+			err = handler.SentPacket(&packet2)
+			Expect(err).To(HaveOccurred())
+		})
+	})
+})