Golang FileSystem.WriteFileString方法代碼示例

func describeDummyPlatform() {
	var (
		platform           Platform
		collector          boshstats.Collector
		fs                 boshsys.FileSystem
		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())
		})
	})
}

		blobId = "105d33ae-655c-493d-bf9f-1df5cf3ca847"
		basePath = os.TempDir()
		blobPath = filepath.Join(basePath, blobId)
		toWrite = bytes.NewReader([]byte("new data"))
	})

	readFile := func(fileIO boshsys.File) []byte {
		fileStat, _ := fileIO.Stat()
		fileBytes := make([]byte, fileStat.Size())
		fileIO.Read(fileBytes)
		return fileBytes
	}

	It("fetches", func() {
		blobManager := NewBlobManager(fs, basePath)
		fs.WriteFileString(blobPath, "some data")

		readOnlyFile, err, _ := blobManager.Fetch(blobId)
		defer fs.RemoveAll(readOnlyFile.Name())

		Expect(err).ToNot(HaveOccurred())
		fileBytes := readFile(readOnlyFile)

		Expect(string(fileBytes)).To(Equal("some data"))
	})

	It("writes", func() {
		blobManager := NewBlobManager(fs, basePath)
		fs.WriteFileString(blobPath, "some data")
		defer fs.RemoveAll(blobPath)

			Expect(cmdRunner.RunCommands[0]).To(Equal(
				[]string{
					"tar", "--same-owner",
					"-xzvf", tarballPath,
					"-C", dstDir,
				},
			))
		})
	})

	Describe("CleanUp", func() {
		It("removes tarball path", func() {
			fs := fakesys.NewFakeFileSystem()
			compressor := NewTarballCompressor(cmdRunner, fs)

			err := fs.WriteFileString("/fake-tarball.tar", "")
			Expect(err).ToNot(HaveOccurred())

			err = compressor.CleanUp("/fake-tarball.tar")
			Expect(err).ToNot(HaveOccurred())

			Expect(fs.FileExists("/fake-tarball.tar")).To(BeFalse())
		})

		It("returns error if removing tarball path fails", func() {
			fs := fakesys.NewFakeFileSystem()
			compressor := NewTarballCompressor(cmdRunner, fs)

			fs.RemoveAllStub = func(_ string) error {
				return errors.New("fake-remove-all-err")
			}

//.........這裏部分代碼省略.........
			It("uses a VirtioDevicePathResolver", func() {
				err := app.Setup([]string{"bosh-agent", "-P", "dummy", "-C", agentConfPath, "-b", baseDir})
				Expect(err).ToNot(HaveOccurred())
				logLevel, err := boshlog.Levelify("DEBUG")
				Expect(err).NotTo(HaveOccurred())

				Expect(app.GetPlatform().GetDevicePathResolver()).To(
					BeAssignableToTypeOf(devicepathresolver.NewVirtioDevicePathResolver(nil, nil, boshlog.NewLogger(logLevel))))
			})
		})

		Context("when DevicePathResolutionType is 'scsi'", func() {
			BeforeEach(func() {
				agentConfJSON = `{
					"Platform": { "Linux": { "DevicePathResolutionType": "scsi" } },
					"Infrastructure": { "Settings": { "Sources": [{ "Type": "CDROM", "FileName": "/fake-file-name" }] } }
				}`
			})

			It("uses a VirtioDevicePathResolver", func() {
				err := app.Setup([]string{"bosh-agent", "-P", "dummy", "-C", agentConfPath, "-b", baseDir})
				Expect(err).ToNot(HaveOccurred())

				Expect(app.GetPlatform().GetDevicePathResolver()).To(
					BeAssignableToTypeOf(devicepathresolver.NewScsiDevicePathResolver(nil, nil, nil)))
			})
		})

		Context("logging stemcell version and git sha", func() {
			var (
				logger                  boshlog.Logger
				outBuf                  *bytes.Buffer
				fakeFs                  boshsys.FileSystem
				stemcellVersionFilePath string
				stemcellSha1FilePath    string
			)

			JustBeforeEach(func() {
				outBuf = bytes.NewBufferString("")
				errBuf := bytes.NewBufferString("")
				logger = boshlog.NewWriterLogger(boshlog.LevelDebug, outBuf, errBuf)
				fakeFs = fakesys.NewFakeFileSystem()
				dirProvider := boshdirs.NewProvider(baseDir)
				stemcellVersionFilePath = filepath.Join(dirProvider.EtcDir(), "stemcell_version")
				stemcellSha1FilePath = filepath.Join(dirProvider.EtcDir(), "stemcell_git_sha1")
				app = New(logger, fakeFs)
			})

			Context("when stemcell version and sha files are present", func() {
				It("should print out the stemcell version and sha in the logs", func() {
					fakeFs.WriteFileString(stemcellVersionFilePath, "version-blah")
					fakeFs.WriteFileString(stemcellSha1FilePath, "sha1-blah")
					app.Setup([]string{"bosh-agent", "-P", "dummy", "-C", agentConfPath, "-b", baseDir})
					Expect(string(outBuf.Bytes())).To(ContainSubstring("Running on stemcell version 'version-blah' (git: sha1-blah)"))
				})
			})

			Context("when stemcell version file is NOT present", func() {
				It("should print out the sha in the logs", func() {
					fakeFs.WriteFileString(stemcellSha1FilePath, "sha1-blah")
					app.Setup([]string{"bosh-agent", "-P", "dummy", "-C", agentConfPath, "-b", baseDir})
					Expect(string(outBuf.Bytes())).To(ContainSubstring("Running on stemcell version '?' (git: sha1-blah)"))
				})
			})

			Context("when sha version file is NOT present", func() {
				It("should print out the stemcell version in the logs", func() {
					fakeFs.WriteFileString(stemcellVersionFilePath, "version-blah")
					app.Setup([]string{"bosh-agent", "-P", "dummy", "-C", agentConfPath, "-b", baseDir})
					Expect(string(outBuf.Bytes())).To(ContainSubstring("Running on stemcell version 'version-blah' (git: ?)"))
				})
			})

			Context("when stemcell version file is empty", func() {
				It("should print out the sha in the logs", func() {
					fakeFs.WriteFileString(stemcellVersionFilePath, "")
					fakeFs.WriteFileString(stemcellSha1FilePath, "sha1-blah")
					app.Setup([]string{"bosh-agent", "-P", "dummy", "-C", agentConfPath, "-b", baseDir})
					Expect(string(outBuf.Bytes())).To(ContainSubstring("Running on stemcell version '?' (git: sha1-blah)"))
				})
			})

			Context("when sha version file is empty", func() {
				It("should print out the stemcell version in the logs", func() {
					fakeFs.WriteFileString(stemcellVersionFilePath, "version-blah")
					fakeFs.WriteFileString(stemcellSha1FilePath, "")
					app.Setup([]string{"bosh-agent", "-P", "dummy", "-C", agentConfPath, "-b", baseDir})
					Expect(string(outBuf.Bytes())).To(ContainSubstring("Running on stemcell version 'version-blah' (git: ?)"))
				})
			})

			Context("when stemcell version and sha files are NOT present", func() {
				It("should print unknown version and sha in the logs", func() {
					app.Setup([]string{"bosh-agent", "-P", "dummy", "-C", agentConfPath, "-b", baseDir})
					Expect(string(outBuf.Bytes())).To(ContainSubstring("Running on stemcell version '?' (git: ?)"))
				})
			})
		})
	})
}

		Describe("AddJob", func() {
			It("creates a service with vcap description", func() {
				conf, err := AddJob("say-hello")
				Expect(err).ToNot(HaveOccurred())

				for _, proc := range conf.Processes {
					stdout, _, _, err := runner.RunCommand("powershell", "/C", "get-service", proc.Name)
					Expect(err).ToNot(HaveOccurred())
					Expect(stdout).To(ContainSubstring(proc.Name))
					Expect(stdout).To(ContainSubstring("Stopped"))
				}
			})

			Context("when monit file is empty", func() {
				BeforeEach(func() {
					Expect(fs.WriteFileString(processConfigPath, "")).To(Succeed())
				})

				It("does not return an error", func() {
					_, err := AddJob("say-hello")
					Expect(err).ToNot(HaveOccurred())
				})
			})
		})

		Describe("Start", func() {
			var conf WindowsProcessConfig
			BeforeEach(func() {
				var err error
				conf, err = AddJob("say-hello")
				Expect(err).ToNot(HaveOccurred())

			BeforeEach(func() {
				fs = boshsys.NewOsFileSystem(logger)

				cmdRunner = boshsys.NewExecCmdRunner(logger)
				compressor = boshcmd.NewTarballCompressor(cmdRunner, fs)

				renderedJobListCompressor = NewRenderedJobListCompressor(fs, compressor, fakeSHA1Calculator, logger)
			})

			It("copies rendered jobs into a new temp dir, compresses the temp dir, and wraps it in a RenderedJobListArchive", func() {
				// create rendered job with 2 rendered scripts
				renderedJobDir0, err := fs.TempDir("RenderedJobListCompressorTest")
				Expect(err).ToNot(HaveOccurred())
				renderedJob0 := NewRenderedJob(bireljob.Job{Name: "fake-job-name-0"}, renderedJobDir0, fs, logger)
				defer func() { err := renderedJob0.Delete(); Expect(err).ToNot(HaveOccurred()) }()
				err = fs.WriteFileString(filepath.Join(renderedJobDir0, "script-0"), "fake-rendered-job-0-script-0-content")
				Expect(err).ToNot(HaveOccurred())
				err = fs.WriteFileString(filepath.Join(renderedJobDir0, "script-1"), "fake-rendered-job-0-script-1-content")
				Expect(err).ToNot(HaveOccurred())
				renderedJobList.Add(renderedJob0)

				// create another rendered job with 1 rendered script
				renderedJobDir1, err := fs.TempDir("RenderedJobListCompressorTest")
				Expect(err).ToNot(HaveOccurred())
				renderedJob1 := NewRenderedJob(bireljob.Job{Name: "fake-job-name-1"}, renderedJobDir1, fs, logger)
				defer func() { err := renderedJob1.Delete(); Expect(err).ToNot(HaveOccurred()) }()
				err = fs.WriteFileString(filepath.Join(renderedJobDir1, "script-0"), "fake-rendered-job-1-script-0-content")
				Expect(err).ToNot(HaveOccurred())
				renderedJobList.Add(renderedJob1)

				// compress

func GenerateDeploymentManifest(deploymentManifestFilePath string, fs boshsys.FileSystem, manifestContents string) error {
	return fs.WriteFileString(deploymentManifestFilePath, manifestContents)
}

		fs      boshsys.FileSystem
	)

	BeforeEach(func() {
		fs = fakesys.NewFakeFileSystem()
		factory = NewDigestProvider(fs)
	})

	Describe("CreateFromFile", func() {
		const (
			filePath     = "/file.txt"
			fileContents = "something different"
		)

		BeforeEach(func() {
			fs.WriteFileString(filePath, fileContents)
		})

		Context("sha1", func() {
			It("opens a file and returns a digest", func() {
				expectedDigest, err := factory.CreateFromFile(filePath, DigestAlgorithmSHA1)
				Expect(err).ToNot(HaveOccurred())
				Expect(expectedDigest.Digest()).To(Equal("da7102c07515effc353226eac2be923c916c5c94"))
			})
		})

		Context("sha256", func() {
			It("opens a file and returns a digest", func() {
				expectedDigest, err := factory.CreateFromFile(filePath, DigestAlgorithmSHA256)
				Expect(err).ToNot(HaveOccurred())
				Expect(expectedDigest.Digest()).To(Equal("73af606b33433fa3a699134b39d5f6bce1ab4a6d9ca3263d3300f31fc5776b12"))

func describeDummyPlatform() {
	var (
		platform           Platform
		collector          boshstats.Collector
		fs                 boshsys.FileSystem
		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))

				Expect(platform.IsMountPoint("dir1")).To(Equal(false))
				Expect(platform.IsMountPoint("dir2")).To(Equal(true))
			})
		})
	})
}