Ω(messageBus.Subscriptions).Should(HaveKey("dea.heartbeat"))
Ω(messageBus.Subscriptions["dea.heartbeat"]).Should(HaveLen(1))
})
It("should subscribe to the dea.advertise subject", func() {
Ω(messageBus.Subscriptions).Should(HaveKey("dea.advertise"))
Ω(messageBus.Subscriptions["dea.advertise"]).Should(HaveLen(1))
})
It("should start tracking store usage", func() {
Ω(usageTracker.DidStart).Should(BeTrue())
Ω(metricsAccountant.TrackedActualStateListenerStoreUsageFraction).Should(Equal(0.7))
})
It("should save heartbeats on a timer", func() {
Ω(timeProvider.TickerDurationFor(HeartbeatSyncTimer)).Should(Equal(conf.ListenerHeartbeatSyncInterval()))
})
Context("when the usage tracker is nil", func() {
It("should not track metrics (or blow up!)", func() {
metricsAccountant.TrackedActualStateListenerStoreUsageFraction = -1.0
listener = New(conf, messageBus, store, nil, metricsAccountant, timeProvider, logger)
Ω(func() {
listener.Start()
}).ShouldNot(Panic())
Ω(metricsAccountant.TrackedActualStateListenerStoreUsageFraction).Should(Equal(-1.0))
})
})
It("To subscribe to the dea.advertise subject", func() {
Expect(messageBus.Subscriptions("dea.advertise")).NotTo(BeNil())
Expect(messageBus.Subscriptions("dea.advertise")).To(HaveLen(1))
})
It("To start tracking store usage", func() {
Expect(usageTracker.StartTrackingUsageCallCount()).To(Equal(1))
Expect(usageTracker.MeasureUsageCallCount()).To(Equal(1))
Expect(metricsAccountant.TrackActualStateListenerStoreUsageFractionCallCount()).To(Equal(1))
Expect(metricsAccountant.TrackActualStateListenerStoreUsageFractionArgsForCall(0)).To(Equal(0.7))
})
It("To save heartbeats on a timer", func() {
beat()
clock.Increment(conf.ListenerHeartbeatSyncInterval())
Eventually(store.SyncHeartbeatsCallCount).Should(Equal(1))
beat()
Consistently(store.SyncHeartbeatsCallCount).Should(Equal(1))
clock.Increment(conf.ListenerHeartbeatSyncInterval())
Eventually(store.SyncHeartbeatsCallCount).Should(Equal(2))
})
Context("When it receives a dea advertisement over the message bus", func() {
advertise := func() {
messageBus.SubjectCallbacks("dea.advertise")[0](&nats.Msg{
Data: []byte("doesn't matter"),
})
}