Golang FakeCake.GetReturns方法代碼示例

var _ = Describe("Local", func() {
	var (
		fetcher           *repository_fetcher.Local
		fakeCake          *fake_cake.FakeCake
		defaultRootFSPath string
		idProvider        UnderscoreIDer
	)

	BeforeEach(func() {
		fakeCake = new(fake_cake.FakeCake)
		defaultRootFSPath = ""
		idProvider = UnderscoreIDer{}

		// default to not containing an image
		fakeCake.GetReturns(nil, errors.New("no image"))
	})

	JustBeforeEach(func() {
		fetcher = &repository_fetcher.Local{
			Cake:              fakeCake,
			IDProvider:        idProvider,
			DefaultRootFSPath: defaultRootFSPath,
		}
	})

	Describe("FetchID", func() {
		It("delegates to the IDProvider", func() {
			Expect(fetcher.FetchID(&url.URL{Path: "/something/something"})).To(Equal(layercake.DockerImageID("_something_something")))
		})
	})

	})

	Context("when the threshold is exceeded", func() {
		BeforeEach(func() {
			fakeThreshold.ExceededReturns(true)
		})

		Describe("GC", func() {
			Context("when there is a single leaf", func() {
				BeforeEach(func() {
					fakeCake.GetAllLeavesReturns([]layercake.ID{layercake.DockerImageID("child")}, nil)
					size[layercake.DockerImageID("child2")] = 2048
				})

				It("should not remove it when it is used by a container", func() {
					fakeCake.GetReturns(&image.Image{Container: "used-by-me"}, nil)
					Expect(gc.GC(logger, fakeCake)).To(Succeed())
					Expect(fakeCake.RemoveCallCount()).To(Equal(0))
				})

				Context("when the layer has no parents", func() {
					BeforeEach(func() {
						fakeCake.GetReturns(&image.Image{}, nil)
					})

					It("removes the layer", func() {
						Expect(gc.GC(logger, fakeCake)).To(Succeed())
						Expect(fakeCake.RemoveCallCount()).To(Equal(1))
						Expect(fakeCake.RemoveArgsForCall(0)).To(Equal(layercake.DockerImageID("child")))
					})

				_, err := cakeOrdinator.Metrics(logger, "something", "")
				Expect(err).To(MatchError("rotten banana"))
			})
		})
	})

	Describe("Destroy", func() {
		It("delegates removal", func() {
			Expect(cakeOrdinator.Destroy(logger, "something", "rootfs")).To(Succeed())
			Expect(fakeCake.RemoveCallCount()).To(Equal(1))
			Expect(fakeCake.RemoveArgsForCall(0)).To(Equal(layercake.ContainerID("something")))
		})

		Context("when the layer is already destroyed", func() {
			It("does not destroy again", func() {
				fakeCake.GetReturns(nil, errors.New("cannae find it"))

				Expect(cakeOrdinator.Destroy(logger, "something", "rootfs")).To(Succeed())
				Expect(fakeCake.RemoveCallCount()).To(Equal(0))
			})
		})

		Context("when the graph can't retrieve information about the layer", func() {
			BeforeEach(func() {
				fakeCake.GetReturns(nil, errors.New("failed tae find it"))
			})

			It("skips destroy and logs the error instead", func() {
				Expect(cakeOrdinator.Destroy(logger, "something", "rootfs")).To(Succeed())
				Expect(logger.LogMessages()).To(ContainElement("test.layer-already-deleted-skipping"))
			})

	. "github.com/onsi/gomega"
)

var _ = Describe("AUFSBaseSizer", func() {
	Describe("BaseSize", func() {
		var (
			baseSizer *quota_manager.AUFSBaseSizer
			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())
			})

					Expect(err).To(HaveOccurred())

					Expect(fakeVolumeCreator.Created).To(BeEmpty())
				})
			})
		})

		Context("when the namespace parameter is true", func() {
			Context("and the image has not been translated yet", func() {
				var (
					mountpoint string
					envvars    []string
				)

				JustBeforeEach(func() {
					fakeCake.GetReturns(nil, errors.New("no image here"))

					fakeCake.PathStub = func(id layercake.ID) (string, error) {
						return "/mount/point/" + id.GraphID(), nil
					}

					fakeNamespacer.CacheKeyReturns("jam")

					var err error
					mountpoint, envvars, err = provider.Create(
						lagertest.NewTestLogger("test"),
						"some-id",
						&repository_fetcher.Image{
							ImageID: "some-image-id",
							Env:     []string{"env1=env1value", "env2=env2value"},
						},

			})
		})

		Context("when the image ID is namespaced", func() {
			It("should delegate to the cake but with an empty parent", func() {
				cake.CreateReturns(testError)
				Expect(aufsCake.Create(namespacedChildID, parentID, "")).To(Equal(testError))
				Expect(cake.CreateCallCount()).To(Equal(1))
				cid, iid, _ := cake.CreateArgsForCall(0)
				Expect(cid).To(Equal(namespacedChildID))
				Expect(iid.GraphID()).To(BeEmpty())
			})

			Context("when mounting child fails", func() {
				It("should return the error", func() {
					cake.GetReturns(nil, testError)
					Expect(aufsCake.Create(namespacedChildID, parentID, "")).To(Equal(testError))
				})
			})

			Context("when getting parent's path fails", func() {
				BeforeEach(func() {
					cake.PathReturns("", testError)
				})

				It("should return the error", func() {
					Expect(aufsCake.Create(namespacedChildID, parentID, "")).To(Equal(testError))
				})

				It("should not unmount the parent", func() {
					Expect(aufsCake.Create(namespacedChildID, parentID, "")).To(Equal(testError))