return true, nil } if id == parentID { return false, nil } return false, errors.New("Unsupported ID") } }) It("should delegate to the cake", func() { isLeaf, err := aufsCake.IsLeaf(childID) Expect(isLeaf).To(BeTrue()) Expect(err).NotTo(HaveOccurred()) Expect(cake.IsLeafCallCount()).To(Equal(1)) Expect(cake.IsLeafArgsForCall(0)).To(Equal(childID)) }) It("should also delegate to the cake for the parent", func() { isLeaf, err := aufsCake.IsLeaf(parentID) Expect(isLeaf).To(BeFalse()) Expect(err).NotTo(HaveOccurred()) Expect(cake.IsLeafCallCount()).To(Equal(1)) Expect(cake.IsLeafArgsForCall(0)).To(Equal(parentID)) }) }) }) Describe("GetAllLeaves", func() { Context("when there are no cloned layers", func() { var (