Expect(ok).To(BeTrue())
				Expect(user789).To(Equal(uaa.User{}))

				Expect(uaaClient.UsersEmailsByIDsCall.Receives.Token).To(Equal(token))
				Expect(uaaClient.UsersEmailsByIDsCall.Receives.IDs).To(Equal([]string{"user-123", "user-789"}))
			})
		})

		Describe("UAA Error Responses", func() {
			Context("when UAA cannot be reached", func() {
				It("returns a UAADownError", func() {
					uaaClient.UsersEmailsByIDsCall.Returns.Error = uaa.NewFailure(404, []byte("Requested route ('uaa.10.244.0.34.xip.io') does not exist"))

					_, err := loader.Load([]string{"user-123"}, token)

					Expect(err).To(BeAssignableToTypeOf(postal.UAADownError("")))
				})
			})

			Context("when UAA returns an unknown UAA 404 error", func() {
				It("returns a UAAGenericError", func() {
					uaaClient.UsersEmailsByIDsCall.Returns.Error = uaa.NewFailure(404, []byte("Weird message we haven't seen"))

					_, err := loader.Load([]string{"user-123"}, token)

					Expect(err).To(BeAssignableToTypeOf(postal.UAAGenericError("")))
				})
			})

			Context("when UAA returns an failure code that is not 404", func() {
				It("returns a UAADownError", func() {
	It("returns a 502 when CloudController fails to respond", func() {
		writer.Write(recorder, services.CCDownError("Bad things happened!"))

		Expect(recorder.Code).To(Equal(http.StatusBadGateway))

		body := make(map[string]interface{})
		err := json.Unmarshal(recorder.Body.Bytes(), &body)
		if err != nil {
			panic(err)
		}

		Expect(body["errors"]).To(ContainElement("Bad things happened!"))
	})

	It("returns a 502 when UAA fails to respond", func() {
		writer.Write(recorder, postal.UAADownError("Whoops!"))

		Expect(recorder.Code).To(Equal(http.StatusBadGateway))

		body := make(map[string]interface{})
		err := json.Unmarshal(recorder.Body.Bytes(), &body)
		if err != nil {
			panic(err)
		}

		Expect(body["errors"]).To(ContainElement("Whoops!"))
	})

	It("returns a 502 when UAA fails for unknown reasons", func() {
		writer.Write(recorder, postal.UAAGenericError("UAA Unknown Error: BOOM!"))