It("heartbeats", func() {
vol, err := volumeFactory.Build(logger, fakeVolume)
Expect(err).ToNot(HaveOccurred())
By("looking up the initial ttl in the database")
Expect(fakeDB.GetVolumeTTLCallCount()).To(Equal(1))
actualHandle := fakeDB.GetVolumeTTLArgsForCall(0)
Expect(actualHandle).To(Equal("some-handle"))
By("using that ttl to heartbeat the volume initially")
Expect(fakeVolume.SetTTLCallCount()).To(Equal(1))
actualTTL := fakeVolume.SetTTLArgsForCall(0)
Expect(actualTTL).To(Equal(expectedTTL))
Expect(fakeDB.SetVolumeTTLCallCount()).To(Equal(1))
actualHandle, actualTTL = fakeDB.SetVolumeTTLArgsForCall(0)
Expect(actualHandle).To(Equal(vol.Handle()))
Expect(actualTTL).To(Equal(expectedTTL))
By("using the ttl from the database each tick")
fakeDB.GetVolumeTTLReturns(expectedTTL2, nil)
fakeClock.Increment(30 * time.Second)
Eventually(fakeVolume.SetTTLCallCount).Should(Equal(2))
actualTTL = fakeVolume.SetTTLArgsForCall(1)
Expect(actualTTL).To(Equal(expectedTTL2))
Eventually(fakeDB.SetVolumeTTLCallCount).Should(Equal(2))
actualHandle, actualTTL = fakeDB.SetVolumeTTLArgsForCall(1)
Expect(actualHandle).To(Equal(vol.Handle()))
Expect(actualTTL).To(Equal(expectedTTL2))
