Golang FakeFileSystem.ReadFileString方法代碼示例

		err = logFile.Close()
		Expect(err).ToNot(HaveOccurred())
	})

	AfterEach(func() {
		logFile.Close()
		fs.RemoveAll(logFile.Name())
	})

	It("logs the formatted DEBUG message to the file", func() {
		logger, logFile, err := New(boshlog.LevelDebug, logFile.Name(), DefaultLogFileMode, fs)
		Expect(err).ToNot(HaveOccurred())

		logger.Debug("TAG", "some %s info to log", "awesome")

		contents, err := fs.ReadFileString(logFile.Name())
		Expect(err).ToNot(HaveOccurred())

		expectedContent := expectedLogFormat("TAG", "DEBUG - some awesome info to log")
		Expect(contents).To(MatchRegexp(expectedContent))
	})

	It("logs the formatted INFO message to the file", func() {
		logger, logFile, err := New(boshlog.LevelDebug, logFile.Name(), DefaultLogFileMode, fs)
		Expect(err).ToNot(HaveOccurred())

		logger.Info("TAG", "some %s info to log", "awesome")

		contents, err := fs.ReadFileString(logFile.Name())
		Expect(err).ToNot(HaveOccurred())

		configPath = filepath.Join("/etc/", "blobstore-fake-provider.json")
		blobstore = NewExternalBlobstore("fake-provider", map[string]interface{}{}, fs, runner, uuidGen, configPath)
	})

	Describe("Validate", func() {
		It("external validate writes config file", func() {
			options := map[string]interface{}{"fake-key": "fake-value"}

			blobstore := NewExternalBlobstore("fake-provider", options, fs, runner, uuidGen, configPath)

			runner.CommandExistsValue = true

			err := blobstore.Validate()
			Expect(err).ToNot(HaveOccurred())

			s3CliConfig, err := fs.ReadFileString(configPath)
			Expect(err).ToNot(HaveOccurred())

			expectedJSON := map[string]string{"fake-key": "fake-value"}
			boshassert.MatchesJSONString(GinkgoT(), expectedJSON, s3CliConfig)
		})

		It("external validate errors when command not in path", func() {
			options := map[string]interface{}{}

			blobstore := NewExternalBlobstore("fake-provider", options, fs, runner, uuidGen, configPath)

			err := blobstore.Validate()
			Expect(err).To(HaveOccurred())
			Expect(err.Error()).To(ContainSubstring("not found in PATH"))
		})

func describeDummyPlatform() {
	var (
		platform           Platform
		collector          boshstats.Collector
		fs                 *fakesys.FakeFileSystem
		cmdRunner          boshsys.CmdRunner
		dirProvider        boshdirs.Provider
		devicePathResolver boshdpresolv.DevicePathResolver
		logger             boshlog.Logger
	)

	BeforeEach(func() {
		collector = &fakestats.FakeCollector{}
		fs = fakesys.NewFakeFileSystem()
		cmdRunner = fakesys.NewFakeCmdRunner()
		dirProvider = boshdirs.NewProvider("/fake-dir")
		devicePathResolver = fakedpresolv.NewFakeDevicePathResolver()
		logger = boshlog.NewLogger(boshlog.LevelNone)
	})

	JustBeforeEach(func() {
		platform = NewDummyPlatform(
			collector,
			fs,
			cmdRunner,
			dirProvider,
			devicePathResolver,
			logger,
		)
	})

	Describe("GetDefaultNetwork", func() {
		It("returns the contents of dummy-defaults-network-settings.json since that's what the dummy cpi writes", func() {
			settingsFilePath := "/fake-dir/bosh/dummy-default-network-settings.json"
			fs.WriteFileString(settingsFilePath, `{"IP": "1.2.3.4"}`)

			network, err := platform.GetDefaultNetwork()
			Expect(err).NotTo(HaveOccurred())

			Expect(network.IP).To(Equal("1.2.3.4"))
		})
	})

	Describe("GetCertManager", func() {
		It("returs a dummy cert manager", func() {
			certManager := platform.GetCertManager()

			Expect(certManager.UpdateCertificates("")).Should(BeNil())
		})
	})

	Describe("UnmountPersistentDisk", func() {
		Context("when there are two mounted persistent disks in the mounts json", func() {
			BeforeEach(func() {

				var mounts []mount
				mounts = append(mounts, mount{MountDir: "dir1", DiskCid: "cid1"})
				mounts = append(mounts, mount{MountDir: "dir2", DiskCid: "cid2"})
				mountsJSON, _ := json.Marshal(mounts)

				mountsPath := path.Join(dirProvider.BoshDir(), "mounts.json")
				fs.WriteFile(mountsPath, mountsJSON)
			})

			It("removes one of the disks from the mounts json", func() {
				unmounted, err := platform.UnmountPersistentDisk(settings.DiskSettings{ID: "cid1"})
				Expect(err).NotTo(HaveOccurred())
				Expect(unmounted).To(Equal(true))

				_, isMountPoint, err := platform.IsMountPoint("dir1")
				Expect(isMountPoint).To(Equal(false))

				_, isMountPoint, err = platform.IsMountPoint("dir2")
				Expect(isMountPoint).To(Equal(true))
			})
		})
	})

	Describe("SetUserPassword", func() {
		It("writes the password to a file", func() {
			err := platform.SetUserPassword("user-name", "fake-password")
			Expect(err).NotTo(HaveOccurred())

			userPasswordsPath := path.Join(dirProvider.BoshDir(), "user-name", CredentialFileName)
			password, err := fs.ReadFileString(userPasswordsPath)
			Expect(err).NotTo(HaveOccurred())
			Expect(password).To(Equal("fake-password"))
		})

		It("writes the passwords to different files for each user", func() {
			err := platform.SetUserPassword("user-name1", "fake-password1")
			Expect(err).NotTo(HaveOccurred())
			err = platform.SetUserPassword("user-name2", "fake-password2")
			Expect(err).NotTo(HaveOccurred())

			userPasswordsPath := path.Join(dirProvider.BoshDir(), "user-name1", CredentialFileName)
			password, err := fs.ReadFileString(userPasswordsPath)
			Expect(err).NotTo(HaveOccurred())
			Expect(password).To(Equal("fake-password1"))

//.........這裏部分代碼省略.........

			Expect(didHandleAlert).To(BeFalse())
		})
	})

	Describe("AddJob", func() {
		BeforeEach(func() {
			fs.WriteFileString("/some/config/path", "fake-config")
		})

		Context("when reading configuration from config path succeeds", func() {
			Context("when writing job configuration succeeds", func() {
				It("returns no error because monit can track added job in jobs directory", func() {
					err := monit.AddJob("router", 0, "/some/config/path")
					Expect(err).ToNot(HaveOccurred())

					writtenConfig, err := fs.ReadFileString(
						dirProvider.MonitJobsDir() + "/0000_router.monitrc")
					Expect(err).ToNot(HaveOccurred())
					Expect(writtenConfig).To(Equal("fake-config"))
				})
			})

			Context("when writing job configuration fails", func() {
				It("returns error", func() {
					fs.WriteFileError = errors.New("fake-write-error")

					err := monit.AddJob("router", 0, "/some/config/path")
					Expect(err).To(HaveOccurred())
					Expect(err.Error()).To(ContainSubstring("fake-write-error"))
				})
			})
		})

				cmdRunner.AddCmdResult("/path-to-script", fakesys.FakeCmdResult{
					Stdout:     "fake-stdout",
					Stderr:     "fake-stderr",
					ExitStatus: 0,
					Error:      nil,
				})
			})

			It("saves stdout/stderr to log file", func() {
				err := genericScript.Run()
				Expect(err).ToNot(HaveOccurred())

				Expect(fs.FileExists(stdoutLogPath)).To(BeTrue())
				Expect(fs.FileExists(stderrLogPath)).To(BeTrue())

				stdout, err := fs.ReadFileString(stdoutLogPath)
				Expect(err).ToNot(HaveOccurred())
				Expect(stdout).To(Equal("fake-stdout"))

				stderr, err := fs.ReadFileString(stderrLogPath)
				Expect(err).ToNot(HaveOccurred())
				Expect(stderr).To(Equal("fake-stderr"))
			})
		})

		Context("when command fails", func() {
			BeforeEach(func() {
				cmdRunner.AddCmdResult("/path-to-script", fakesys.FakeCmdResult{
					Stdout:     "fake-stdout",
					Stderr:     "fake-stderr",
					ExitStatus: 1,

					Stderr:            []byte("fake-stderr"),
					ExitStatus:        0,
				}

				result, err := runner.RunCommand("fake-log-dir-name", "fake-log-file-name", cmd)
				Expect(err).ToNot(HaveOccurred())
				Expect(result).To(Equal(expectedResult))
			})

			It("saves stdout to log file", func() {
				_, err := runner.RunCommand("fake-log-dir-name", "fake-log-file-name", cmd)
				Expect(err).ToNot(HaveOccurred())

				Expect(fs.FileExists("/fake-base-dir/fake-log-dir-name/fake-log-file-name.stdout.log")).To(BeTrue())

				stdout, err := fs.ReadFileString("/fake-base-dir/fake-log-dir-name/fake-log-file-name.stdout.log")
				Expect(err).ToNot(HaveOccurred())
				Expect(stdout).To(Equal("fake-stdout"))
			})

			It("saves stderr to log file", func() {
				_, err := runner.RunCommand("fake-log-dir-name", "fake-log-file-name", cmd)
				Expect(err).ToNot(HaveOccurred())

				Expect(fs.FileExists("/fake-base-dir/fake-log-dir-name/fake-log-file-name.stderr.log")).To(BeTrue())

				stdout, err := fs.ReadFileString("/fake-base-dir/fake-log-dir-name/fake-log-file-name.stderr.log")
				Expect(err).ToNot(HaveOccurred())
				Expect(stdout).To(Equal("fake-stderr"))
			})
		})

				err := fs.MkdirAll("fake-device-path", os.FileMode(0750))
				Expect(err).ToNot(HaveOccurred())

				err = fs.Symlink("fake-device-path", "/dev/disk/by-id/scsi-3"+id)
				Expect(err).ToNot(HaveOccurred())
			})

			It("returns the path", func() {
				path, timeout, err := pathResolver.GetRealDevicePath(diskSettings)
				Expect(err).ToNot(HaveOccurred())

				Expect(path).To(Equal("fake-device-path"))
				Expect(timeout).To(BeFalse())

				for _, host := range hosts {
					str, _ := fs.ReadFileString(host)
					Expect(str).To(Equal("- - -"))
				}
			})
		})

		Context("when path does not exist", func() {
			BeforeEach(func() {
				err := fs.Symlink("fake-device-path", "/dev/disk/by-id/scsi-3"+id)
				Expect(err).ToNot(HaveOccurred())
			})

			It("returns an error", func() {
				_, _, err := pathResolver.GetRealDevicePath(diskSettings)
				Expect(err).To(HaveOccurred())
			})

		It("runs a successful script command and doesnt return an error", func() {
			script := `
Write-Output stdout
[Console]::Error.WriteLine('stderr')
`

			cmdRunner.AddCmdResult("/fake-temp-file.fake-ext", fakesys.FakeCmdResult{
				Stdout:     "stdout",
				Stderr:     "stderr",
				ExitStatus: 0,
			})

			var scriptContent string
			cmdCallback := func() {
				var err error
				scriptContent, err = fs.ReadFileString("/fake-temp-file.fake-ext")
				Expect(err).NotTo(HaveOccurred())
			}
			cmdRunner.SetCmdCallback("/fake-temp-file.fake-ext", cmdCallback)

			stdout, stderr, err := scriptRunner.Run(script)
			Expect(err).NotTo(HaveOccurred())
			Expect(stdout).To(Equal("stdout"))
			Expect(stderr).To(Equal("stderr"))

			Expect(scriptContent).To(Equal(script))
		})

		It("runs a failing Powershell command and returns error", func() {
			cmdRunner.AddCmdResult("/fake-temp-file.fake-ext", fakesys.FakeCmdResult{
				Error: errors.New("failed"),

		})

		fs.SetGlob("/sys/bus/scsi/devices/fake-host-id:0:fake-disk-id:0/block/*", []string{
			"/sys/bus/scsi/devices/fake-host-id:0:fake-disk-id:0/block/sdf",
		})

		diskSettings = boshsettings.DiskSettings{
			VolumeID: "fake-disk-id",
		}
	})

	Describe("GetRealDevicePath", func() {
		It("rescans the devices attached to the root disks scsi controller", func() {
			resolver.GetRealDevicePath(diskSettings)

			scanContents, err := fs.ReadFileString("/sys/class/scsi_host/hostfake-host-id/scan")
			Expect(err).NotTo(HaveOccurred())
			Expect(scanContents).To(Equal("- - -"))
		})

		It("detects device", func() {
			devicePath, timedOut, err := resolver.GetRealDevicePath(diskSettings)
			Expect(err).NotTo(HaveOccurred())
			Expect(timedOut).To(BeFalse())
			Expect(devicePath).To(Equal("/dev/sdf"))
		})

		Context("when device does not immediately appear", func() {
			It("retries detection of device", func() {
				fs.SetGlob("/sys/bus/scsi/devices/fake-host-id:0:fake-disk-id:0/block/*",
					[]string{},

		It("updates the blob on the file system", func() {
			fs.WriteFileString("/var/vcap/micro_bosh/data/cache/123-456-789", "Some data")

			putBody := `Updated data`
			putPayload := strings.NewReader(putBody)

			request, err := http.NewRequest("PUT", serverURL+"/blobs/a5/123-456-789", putPayload)
			Expect(err).ToNot(HaveOccurred())

			httpResponse, err := httpClient.Do(request)
			Expect(err).ToNot(HaveOccurred())

			defer httpResponse.Body.Close()
			Expect(httpResponse.StatusCode).To(Equal(201))

			contents, err := fs.ReadFileString("/var/vcap/micro_bosh/data/cache/123-456-789")
			Expect(err).ToNot(HaveOccurred())
			Expect(contents).To(Equal("Updated data"))
		})

		Context("when manager errors", func() {
			It("returns a 500 because of openfile error", func() {
				fs.OpenFileErr = errors.New("oops")

				putBody := `Updated data`
				putPayload := strings.NewReader(putBody)

				request, err := http.NewRequest("PUT", serverURL+"/blobs/a5/123-456-789", putPayload)
				Expect(err).ToNot(HaveOccurred())

				httpResponse, err := httpClient.Do(request)

		oldLocation = "/path/to/old_file"
		newLocation = "/path/to/new_file"

		fs.WriteFileString(oldLocation, "some content")
	})

	It("renames the file", func() {
		Expect(fs.FileExists(oldLocation)).To(BeTrue())
		Expect(fs.FileExists(newLocation)).To(BeFalse())

		err := mover.Move(oldLocation, newLocation)
		Expect(err).ToNot(HaveOccurred())

		Expect(fs.FileExists(oldLocation)).To(BeFalse())

		contents, err := fs.ReadFileString(newLocation)
		Expect(err).ToNot(HaveOccurred())
		Expect(contents).To(Equal("some content"))
	})

	Context("when Rename fails due to EXDEV error", func() {
		BeforeEach(func() {
			fs.RenameError = &os.LinkError{
				Err: syscall.Errno(0x12),
			}
		})

		It("moves the file", func() {
			Expect(fs.FileExists(oldLocation)).To(BeTrue())
			Expect(fs.FileExists(newLocation)).To(BeFalse())

  stemcell: default
  migrated_from:
  - name: baz-job
    az: z5
  azs:
  - z3
  - z4
  templates:
  - name: simple
    release: foo-release
  networks:
  - name: default
    default: [dns, gateway]
`

		manifestContents, err := fs.ReadFileString(manifestPath)
		Expect(err).ToNot(HaveOccurred())
		Expect(manifestContents).To(Equal(expectedManifestContents))

		expectedCloudConfigContents := `---
azs:
- name: z1
  cloud_properties:
    baz: qux
    foo: bar
- name: z2
  cloud_properties: {}
- name: z3
  cloud_properties: {}
- name: z4
  cloud_properties: {}

func describeDummyPlatform() {
	var (
		platform           Platform
		collector          boshstats.Collector
		fs                 *fakesys.FakeFileSystem
		cmdRunner          boshsys.CmdRunner
		dirProvider        boshdirs.Provider
		devicePathResolver boshdpresolv.DevicePathResolver
		logger             boshlog.Logger
	)

	BeforeEach(func() {
		collector = &fakestats.FakeCollector{}
		fs = fakesys.NewFakeFileSystem()
		cmdRunner = fakesys.NewFakeCmdRunner()
		dirProvider = boshdirs.NewProvider("/fake-dir")
		devicePathResolver = fakedpresolv.NewFakeDevicePathResolver()
		logger = boshlog.NewLogger(boshlog.LevelNone)
	})

	JustBeforeEach(func() {
		platform = NewDummyPlatform(
			collector,
			fs,
			cmdRunner,
			dirProvider,
			devicePathResolver,
			logger,
		)
	})

	Describe("GetDefaultNetwork", func() {
		It("returns the contents of dummy-defaults-network-settings.json since that's what the dummy cpi writes", func() {
			settingsFilePath := "/fake-dir/bosh/dummy-default-network-settings.json"
			fs.WriteFileString(settingsFilePath, `{"IP": "1.2.3.4"}`)

			network, err := platform.GetDefaultNetwork()
			Expect(err).NotTo(HaveOccurred())

			Expect(network.IP).To(Equal("1.2.3.4"))
		})
	})

	Describe("GetCertManager", func() {
		It("returns a dummy cert manager", func() {
			certManager := platform.GetCertManager()

			Expect(certManager.UpdateCertificates("")).Should(BeNil())
		})
	})

	Describe("MountPersistentDisk", func() {
		var diskSettings boshsettings.DiskSettings
		var mountsPath, managedSettingsPath, formattedDisksPath string

		BeforeEach(func() {
			diskSettings = boshsettings.DiskSettings{ID: "somediskid"}
			mountsPath = filepath.Join(dirProvider.BoshDir(), "mounts.json")
			managedSettingsPath = filepath.Join(dirProvider.BoshDir(), "managed_disk_settings.json")
			formattedDisksPath = filepath.Join(dirProvider.BoshDir(), "formatted_disks.json")
		})

		It("Mounts a persistent disk", func() {
			mountsContent, _ := fs.ReadFileString(mountsPath)
			Expect(mountsContent).To(Equal(""))

			err := platform.MountPersistentDisk(diskSettings, "/dev/potato")
			Expect(err).NotTo(HaveOccurred())

			mountsContent, _ = fs.ReadFileString(mountsPath)
			Expect(mountsContent).To(Equal(`[{"MountDir":"/dev/potato","DiskCid":"somediskid"}]`))
		})

		It("Updates the managed disk settings", func() {
			lastMountedCid, _ := fs.ReadFileString(managedSettingsPath)
			Expect(lastMountedCid).To(Equal(""))

			err := platform.MountPersistentDisk(diskSettings, "/dev/potato")
			Expect(err).NotTo(HaveOccurred())

			lastMountedCid, _ = fs.ReadFileString(managedSettingsPath)
			Expect(lastMountedCid).To(Equal("somediskid"))
		})

		It("Updates the formatted disks", func() {
			formattedDisks, _ := fs.ReadFileString(formattedDisksPath)
			Expect(formattedDisks).To(Equal(""))

			err := platform.MountPersistentDisk(diskSettings, "/dev/potato")
			Expect(err).NotTo(HaveOccurred())

			formattedDisks, _ = fs.ReadFileString(formattedDisksPath)
			Expect(formattedDisks).To(Equal(`[{"DiskCid":"somediskid"}]`))
		})

		Context("Device has already been mounted as expected", func() {
			BeforeEach(func() {
				fs.WriteFileString(managedSettingsPath, "somediskid")
				fs.WriteFileString(mountsPath, `[{"MountDir":"/dev/potato","DiskCid":"somediskid"}]`)
			})
//.........這裏部分代碼省略.........

			})

			It("deletes the legacy deployment state file", func() {
				migrated, err := migrator.MigrateIfExists(legacyDeploymentStateFilePath)
				Expect(migrated).To(BeTrue())
				Expect(err).ToNot(HaveOccurred())

				Expect(fakeFs.FileExists(legacyDeploymentStateFilePath)).To(BeFalse())
			})

			It("uses the legacy UUID as the director_uuid in the new deployment manifest", func() {
				migrated, err := migrator.MigrateIfExists(legacyDeploymentStateFilePath)
				Expect(migrated).To(BeTrue())
				Expect(err).ToNot(HaveOccurred())

				content, err := fakeFs.ReadFileString(modernDeploymentStateFilePath)
				Expect(err).ToNot(HaveOccurred())

				Expect(content).To(MatchRegexp(`{
    "director_id": "bm-5480c6bb-3ba8-449a-a262-a2e75fbe5daf",
    "installation_id": "",
    "current_vm_cid": "",
    "current_stemcell_id": "",
    "current_disk_id": "",
    "current_release_ids": null,
    "current_manifest_sha1": "",
    "disks": \[\],
    "stemcells": \[\],
    "releases": \[\]
}`))
			})

			Expect(fakeDavClient.GetPath).To(Equal("fake-blob-id"))
		})

		It("saves the blob to the destination path", func() {
			fakeDavClient.GetContents = ioutil.NopCloser(strings.NewReader("fake-content"))

			localBlob, err := blobstore.Get("fake-blob-id")
			Expect(err).ToNot(HaveOccurred())
			defer func() {
				err := localBlob.Delete()
				Expect(err).ToNot(HaveOccurred())
			}()

			Expect(localBlob.Path()).To(Equal("fake-destination-path"))

			contents, err := fs.ReadFileString("fake-destination-path")
			Expect(err).ToNot(HaveOccurred())
			Expect(contents).To(Equal("fake-content"))
		})

		Context("when getting from blobstore fails", func() {
			It("returns an error", func() {
				fakeDavClient.GetErr = errors.New("fake-get-error")

				_, err := blobstore.Get("fake-blob-id")
				Expect(err).To(HaveOccurred())
				Expect(err.Error()).To(ContainSubstring("fake-get-error"))
			})
		})
	})