Expect(fakeRunningSecurityGroupRepo.BindToRunningSetArgsForCall(0)).To(Equal("being-a-guid"))
		})

		Context("when binding the security group to the running set fails", func() {
			BeforeEach(func() {
				fakeRunningSecurityGroupRepo.BindToRunningSetReturns(errors.New("WOAH. I know kung fu"))
			})

			It("fails and describes the failure to the user", func() {
				Expect(ui.Outputs()).To(ContainSubstrings(
					[]string{"FAILED"},
					[]string{"WOAH. I know kung fu"},
				))
			})
		})

		Context("when the security group with the given name cannot be found", func() {
			BeforeEach(func() {
				fakeSecurityGroupRepo.ReadReturns(models.SecurityGroup{}, errors.New("Crème insufficiently brûlée'd"))
			})

			It("fails and tells the user that the security group does not exist", func() {
				Expect(fakeRunningSecurityGroupRepo.BindToRunningSetCallCount()).To(Equal(0))
				Expect(ui.Outputs()).To(ContainSubstrings(
					[]string{"FAILED"},
				))
			})
		})
	})
})