Describe("restarting an instance of an application", func() { It("correctly 'restarts' the desired instance", func() { runCommand("my-app", "0") app_guid, instance := appInstancesRepo.DeleteInstanceArgsForCall(0) Expect(app_guid).To(Equal(application.GUID)) Expect(instance).To(Equal(0)) Expect(ui.Outputs()).To(ContainSubstrings( []string{"Restarting instance 0 of application my-app as my-user"}, []string{"OK"}, )) }) Context("when deleting the app instance fails", func() { BeforeEach(func() { appInstancesRepo.DeleteInstanceReturns(errors.New("deletion failed")) }) It("fails", func() { runCommand("my-app", "0") app_guid, instance := appInstancesRepo.DeleteInstanceArgsForCall(0) Expect(app_guid).To(Equal(application.GUID)) Expect(instance).To(Equal(0)) Expect(ui.Outputs()).To(ContainSubstrings( []string{"FAILED"}, []string{"deletion failed"}, )) }) })