})

		Context("when there is NEITHER a docker image url NOR a droplet uri", func() {
			BeforeEach(func() {
				desiredAppReq.DockerImageUrl = ""
				desiredAppReq.DropletUri = ""
			})

			It("should error", func() {
				Expect(err).To(MatchError(recipebuilder.ErrDropletSourceMissing))
			})
		})

		Context("when there is no file descriptor limit", func() {
			BeforeEach(func() {
				desiredAppReq.FileDescriptors = 0
			})

			It("does not error", func() {
				Expect(err).NotTo(HaveOccurred())
			})

			It("sets a default FD limit on the run action", func() {
				parallelRunAction := desiredLRP.Action.CodependentAction
				Expect(parallelRunAction.Actions).To(HaveLen(1))

				runAction := parallelRunAction.Actions[0].RunAction

				Expect(runAction.ResourceLimits.Nofile).NotTo(BeNil())
				Expect(*runAction.ResourceLimits.Nofile).To(Equal(recipebuilder.DefaultFileDescriptorLimit))
			})