fakeCake  *fake_cake.FakeCake

			logger lager.Logger
		)

		BeforeEach(func() {
			logger = lagertest.NewTestLogger("test")
			fakeCake = new(fake_cake.FakeCake)
			fakeCake.GetReturns(nil, errors.New("no such image"))

			baseSizer = quota_manager.NewAUFSBaseSizer(fakeCake)
		})

		It("asks for the size of the layer based on the base name of the rootfs path", func() {
			baseSizer.BaseSize(logger, "/some/path/to/54321")
			Expect(fakeCake.GetCallCount()).To(Equal(1))
			Expect(fakeCake.GetArgsForCall(0)).To(Equal(layercake.DockerImageID("54321")))
		})

		Context("when the layer doesn't exist", func() {
			It("returns an error", func() {
				_, err := baseSizer.BaseSize(logger, "/i/dont/exist")
				Expect(err).To(HaveOccurred())
			})
		})

		Context("when the layer exists", func() {
			Context("and has no parents", func() {
				It("returns the size of the layer", func() {
					fakeCake.GetReturns(&image.Image{
						Size: 1234,