initial hybrid slow start implementation

congestion/hybrid_slow_start_test.go

@@ -0,0 +1,47 @@
+package congestion_test
+
+import (
+	"github.com/lucas-clemente/quic-go/congestion"
+	. "github.com/onsi/ginkgo"
+	. "github.com/onsi/gomega"
+)
+
+var _ = Describe("Hybrid slow start", func() {
+	var (
+		slowStart congestion.HybridSlowStart
+	)
+
+	BeforeEach(func() {
+		slowStart = congestion.HybridSlowStart{}
+	})
+
+	It("works in a simple case", func() {
+		packet_number := uint64(1)
+		end_packet_number := uint64(3)
+		slowStart.StartReceiveRound(end_packet_number)
+
+		packet_number++
+		Expect(slowStart.IsEndOfRound(packet_number)).To(BeFalse())
+
+		// Test duplicates.
+		Expect(slowStart.IsEndOfRound(packet_number)).To(BeFalse())
+
+		packet_number++
+		Expect(slowStart.IsEndOfRound(packet_number)).To(BeFalse())
+		packet_number++
+		Expect(slowStart.IsEndOfRound(packet_number)).To(BeTrue())
+
+		// Test without a new registered end_packet_number;
+		packet_number++
+		Expect(slowStart.IsEndOfRound(packet_number)).To(BeTrue())
+
+		end_packet_number = 20
+		slowStart.StartReceiveRound(end_packet_number)
+		for packet_number < end_packet_number {
+			packet_number++
+			Expect(slowStart.IsEndOfRound(packet_number)).To(BeFalse())
+		}
+		packet_number++
+		Expect(slowStart.IsEndOfRound(packet_number)).To(BeTrue())
+	})
+})