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implement cubic "exponential slow start" test

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This commit is contained in:
Lucas Clemente
2016-04-28 10:34:27 +02:00
parent 2da6f1860e
commit f869be1eb1
3 changed files with 30 additions and 0 deletions
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19
congestion/cubic_sender_test.go
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@@ -100,4 +100,23 @@ var _ = Describe("Cubic Sender", func() {
// half the CWND.
Expect(bytesToSend).To(Equal(defaultWindowTCP + protocol.DefaultTCPMSS*2*2))
})
It("exponential slow start", func() {
const kNumberOfAcks = 20
// At startup make sure we can send.
Expect(sender.TimeUntilSend(clock.Now(), 0)).To(BeZero())
Expect(sender.BandwidthEstimate()).To(BeZero())
// Make sure we can send.
Expect(sender.TimeUntilSend(clock.Now(), 0)).To(BeZero())
for i := 0; i < kNumberOfAcks; i++ {
// Send our full send window.
SendAvailableSendWindow(protocol.DefaultTCPMSS)
AckNPackets(2)
}
cwnd := sender.GetCongestionWindow()
Expect(cwnd).To(Equal(defaultWindowTCP + protocol.DefaultTCPMSS*2*kNumberOfAcks))
Expect(sender.BandwidthEstimate()).To(Equal(congestion.BandwidthFromDelta(cwnd, rttStats.SmoothedRTT())))
})
})