Golang FakeFileSystem.ReadFileError方法代碼示例

		Context("when saving to index fails", func() {
			It("returns error", func() {
				fakeFS.WriteFileError = errors.New("Could not save")
				record := CompiledPackageRecord{
					BlobID:   "fake-blob-id",
					BlobSHA1: "fake-sha1",
				}

				pkg := birelpkg.Package{
					Name: "fake-package-name",
				}

				err := compiledPackageRepo.Save(pkg, record)
				Expect(err).To(HaveOccurred())
				Expect(err.Error()).To(ContainSubstring("Saving compiled package"))
			})
		})

		Context("when reading from index fails", func() {
			It("returns error", func() {
				err := compiledPackageRepo.Save(pkg, record)
				fakeFS.ReadFileError = errors.New("fake-error")

				_, _, err = compiledPackageRepo.Find(pkg)
				Expect(err).To(HaveOccurred())
				Expect(err.Error()).To(ContainSubstring("Finding compiled package"))
			})
		})
	})
})

		Context("when the config does not exist", func() {
			It("returns a new DeploymentState with generated defaults", func() {
				deploymentState, err := service.Load()
				Expect(err).NotTo(HaveOccurred())
				Expect(deploymentState).To(Equal(DeploymentState{
					DirectorID: "fake-uuid-0",
				}))

				Expect(fakeFs.FileExists(deploymentStatePath)).To(BeTrue())
			})
		})

		Context("when reading config file fails", func() {
			BeforeEach(func() {
				fakeFs.WriteFileString(deploymentStatePath, "{}")
				fakeFs.ReadFileError = errors.New("fake-read-error")
			})

			It("returns an error", func() {
				_, err := service.Load()
				Expect(err).To(HaveOccurred())
				Expect(err.Error()).To(ContainSubstring("fake-read-error"))
			})
		})

		Context("when the config is invalid", func() {
			It("returns an empty DeploymentState and an error", func() {
				fakeFs.WriteFileString(deploymentStatePath, "some invalid content")
				deploymentState, err := service.Load()
				Expect(err).To(HaveOccurred())
				Expect(err.Error()).To(ContainSubstring("Unmarshalling deployment state file '/some/deployment.json'"))

func rootDesc() {
	var (
		repo                   ReleaseRepo
		deploymentStateService DeploymentStateService
		fs                     *fakesys.FakeFileSystem
		fakeUUIDGenerator      *fakeuuid.FakeGenerator
	)

	BeforeEach(func() {
		logger := boshlog.NewLogger(boshlog.LevelNone)
		fs = fakesys.NewFakeFileSystem()
		fakeUUIDGenerator = &fakeuuid.FakeGenerator{}
		fakeUUIDGenerator.GeneratedUUID = "fake-uuid"
		deploymentStateService = NewFileSystemDeploymentStateService(fs, fakeUUIDGenerator, logger, "/fake/path")
		deploymentStateService.Load()
		repo = NewReleaseRepo(deploymentStateService, fakeUUIDGenerator)
	})

	Describe("List", func() {
		Context("when a current release exists", func() {
			BeforeEach(func() {
				conf, err := deploymentStateService.Load()
				Expect(err).ToNot(HaveOccurred())
				conf.Releases = []ReleaseRecord{
					ReleaseRecord{ID: "fake-guid-a", Name: "fake-name-a", Version: "fake-version-a"},
					ReleaseRecord{ID: "fake-guid-b", Name: "fake-name-b", Version: "fake-version-b"},
				}
				err = deploymentStateService.Save(conf)
				Expect(err).ToNot(HaveOccurred())
			})

			It("returns existing release", func() {
				records, err := repo.List()
				Expect(err).ToNot(HaveOccurred())
				Expect(records).To(Equal([]ReleaseRecord{
					{
						ID:      "fake-guid-a",
						Name:    "fake-name-a",
						Version: "fake-version-a",
					},
					{
						ID:      "fake-guid-b",
						Name:    "fake-name-b",
						Version: "fake-version-b",
					},
				}))
			})
		})

		Context("when there are no releases recorded", func() {
			It("returns not found", func() {
				records, err := repo.List()
				Expect(err).ToNot(HaveOccurred())
				Expect(records).To(HaveLen(0))
			})
		})

		Context("when the config service fails to load", func() {
			BeforeEach(func() {
				fs.ReadFileError = errors.New("kaboom")
			})

			It("returns an error", func() {
				_, err := repo.List()
				Expect(err).To(HaveOccurred())
				Expect(err.Error()).To(ContainSubstring("Loading existing config"))
			})
		})
	})

	Describe("Update", func() {
		Context("when there are no existing releases", func() {
			It("saves the provided releases to the config file", func() {
				err := repo.Update([]release.Release{
					fakerelease.New("name1", "1"),
					fakerelease.New("name2", "2"),
				})
				Expect(err).ToNot(HaveOccurred())
				conf, err := deploymentStateService.Load()
				Expect(err).ToNot(HaveOccurred())
				Expect(conf.Releases).To(ConsistOf(
					ReleaseRecord{ID: "fake-uuid", Name: "name1", Version: "1"},
					ReleaseRecord{ID: "fake-uuid", Name: "name2", Version: "2"},
				))
			})
		})

		Context("when the existing releases exactly match the provided releases", func() {
			BeforeEach(func() {
				conf, err := deploymentStateService.Load()
				Expect(err).ToNot(HaveOccurred())
				conf.Releases = []ReleaseRecord{
					ReleaseRecord{ID: "old-uuid", Name: "name1", Version: "1"},
					ReleaseRecord{ID: "old-uuid", Name: "name2", Version: "2"},
				}
				err = deploymentStateService.Save(conf)
				Expect(err).ToNot(HaveOccurred())
			})
		})

//.........這裏部分代碼省略.........