Golang FakeFileSystem.WriteFile方法代碼示例

//.........這裏部分代碼省略.........
				Expect(err).NotTo(HaveOccurred())
				Expect(2).To(Equal(len(platform.SetTimeWithNtpServersServers)))
				Expect("0.north-america.pool.ntp.org").To(Equal(platform.SetTimeWithNtpServersServers[0]))
				Expect("1.north-america.pool.ntp.org").To(Equal(platform.SetTimeWithNtpServersServers[1]))
			})

			It("setups up monit user", func() {
				err := bootstrap()
				Expect(err).NotTo(HaveOccurred())
				Expect(platform.SetupMonitUserSetup).To(BeTrue())
			})

			It("starts monit", func() {
				err := bootstrap()
				Expect(err).NotTo(HaveOccurred())
				Expect(platform.StartMonitStarted).To(BeTrue())
			})
		})

		Describe("Network setup exercised by Run", func() {
			var (
				settingsJSON string

				fs                     *fakesys.FakeFileSystem
				platform               boshplatform.Platform
				boot                   Bootstrap
				defaultNetworkResolver boshsettings.DefaultNetworkResolver
				logger                 boshlog.Logger
				dirProvider            boshdirs.Provider
			)

			writeNetworkDevice := func(iface string, macAddress string, isPhysical bool) string {
				interfacePath := fmt.Sprintf("/sys/class/net/%s", iface)
				fs.WriteFile(interfacePath, []byte{})
				if isPhysical {
					fs.WriteFile(fmt.Sprintf("/sys/class/net/%s/device", iface), []byte{})
				}
				fs.WriteFileString(fmt.Sprintf("/sys/class/net/%s/address", iface), fmt.Sprintf("%s\n", macAddress))

				return interfacePath
			}

			stubInterfaces := func(interfaces [][]string) {
				var interfacePaths []string

				for _, iface := range interfaces {
					interfaceName := iface[0]
					interfaceMAC := iface[1]
					interfaceType := iface[2]
					isPhysical := interfaceType == "physical"
					interfacePaths = append(interfacePaths, writeNetworkDevice(interfaceName, interfaceMAC, isPhysical))
				}

				fs.SetGlob("/sys/class/net/*", interfacePaths)
			}

			BeforeEach(func() {
				fs = fakesys.NewFakeFileSystem()
				runner := fakesys.NewFakeCmdRunner()
				dirProvider = boshdirs.NewProvider("/var/vcap/bosh")

				linuxOptions := boshplatform.LinuxOptions{
					CreatePartitionIfNoEphemeralDisk: true,
				}

				logger = boshlog.NewLogger(boshlog.LevelNone)

	})

	Describe("GetSettings", func() {
		Context("when the registry file exists", func() {
			var (
				expectedSettings boshsettings.Settings
			)

			BeforeEach(func() {
				expectedSettings = boshsettings.Settings{
					AgentID: "fake-agent-id",
				}
				settingsJSON, err := json.Marshal(expectedSettings)
				Expect(err).ToNot(HaveOccurred())

				fs.WriteFile("/fake-registry-file-path", settingsJSON)
			})

			It("returns the settings", func() {
				settings, err := fileRegistry.GetSettings()
				Expect(err).ToNot(HaveOccurred())
				Expect(settings).To(Equal(expectedSettings))
			})
		})

		Context("when the registry file does not exist", func() {
			It("returns an error", func() {
				_, err := fileRegistry.GetSettings()
				Expect(err).To(HaveOccurred())
			})
		})

				Expect(err).To(HaveOccurred())

				Expect(len(runner.RunComplexCommands)).To(Equal(1))
				Expect(runner.RunComplexCommands[0].Env).ToNot(HaveKey("BOSH_JOB_NEXT_STATE"))
			})

			It("returns error when cannot get the job next state and does not run drain script", func() {
				params.jobNextStateErr = errors.New("fake-job-next-state-err")

				_, err := script.Run(params)
				Expect(err).To(HaveOccurred())
				Expect(err.Error()).To(ContainSubstring("fake-job-next-state-err"))

				Expect(len(runner.RunComplexCommands)).To(Equal(0))
			})
		})
	})

	Describe("Exists", func() {
		It("returns bool", func() {
			commandResult := fakesys.FakeCmdResult{Stdout: "1"}
			runner.AddCmdResult("/fake/script job_shutdown hash_unchanged foo bar", commandResult)

			Expect(script.Exists()).To(BeFalse())

			fs.WriteFile("/fake/script", []byte{})
			Expect(script.Exists()).To(BeTrue())
		})
	})
})

//.........這裏部分代碼省略.........

			err := platform.CreateUser("foo-user", "", "/some/path/to/home")
			Expect(err).NotTo(HaveOccurred())

			basePathStat := fs.GetFileTestStat("/some/path/to/home")
			Expect(basePathStat.FileType).To(Equal(fakesys.FakeFileTypeDir))
			Expect(basePathStat.FileMode).To(Equal(os.FileMode(0755)))

			Expect(cmdRunner.RunCommands).To(Equal([][]string{expectedUseradd}))
		})
	})

	Describe("AddUserToGroups", func() {
		It("adds user to groups", func() {
			err := platform.AddUserToGroups("foo-user", []string{"group1", "group2", "group3"})
			Expect(err).NotTo(HaveOccurred())

			Expect(len(cmdRunner.RunCommands)).To(Equal(1))

			usermod := []string{"usermod", "-G", "group1,group2,group3", "foo-user"}
			Expect(cmdRunner.RunCommands[0]).To(Equal(usermod))
		})
	})

	Describe("DeleteEphemeralUsersMatching", func() {
		It("deletes users with prefix and regex", func() {
			passwdFile := `bosh_foo:...
bosh_bar:...
foo:...
bar:...
foobar:...
bosh_foobar:...`

			fs.WriteFileString("/etc/passwd", passwdFile)

			err := platform.DeleteEphemeralUsersMatching("bar$")
			Expect(err).NotTo(HaveOccurred())
			Expect(len(cmdRunner.RunCommands)).To(Equal(2))
			Expect(cmdRunner.RunCommands[0]).To(Equal([]string{"userdel", "-r", "bosh_bar"}))
			Expect(cmdRunner.RunCommands[1]).To(Equal([]string{"userdel", "-r", "bosh_foobar"}))
		})
	})

	Describe("SetupSSH", func() {
		It("setup ssh", func() {
			fs.HomeDirHomePath = "/some/home/dir"

			platform.SetupSSH("some public key", "vcap")

			sshDirPath := "/some/home/dir/.ssh"
			sshDirStat := fs.GetFileTestStat(sshDirPath)

			Expect("vcap").To(Equal(fs.HomeDirUsername))

			Expect(sshDirStat).NotTo(BeNil())
			Expect(sshDirStat.FileType).To(Equal(fakesys.FakeFileTypeDir))
			Expect(os.FileMode(0700)).To(Equal(sshDirStat.FileMode))
			Expect("vcap").To(Equal(sshDirStat.Username))

			authKeysStat := fs.GetFileTestStat(filepath.Join(sshDirPath, "authorized_keys"))

			Expect(authKeysStat).NotTo(BeNil())
			Expect(fakesys.FakeFileTypeFile).To(Equal(authKeysStat.FileType))
			Expect(os.FileMode(0600)).To(Equal(authKeysStat.FileMode))
			Expect("vcap").To(Equal(authKeysStat.Username))
			Expect("some public key").To(Equal(authKeysStat.StringContents()))

func init() {
	Describe("prepareNetworkChange", func() {
		var (
			action PrepareNetworkChangeAction
			fs     *fakesys.FakeFileSystem

			settingsService *fakesettings.FakeSettingsService
		)

		BeforeEach(func() {
			fs = fakesys.NewFakeFileSystem()
			settingsService = &fakesettings.FakeSettingsService{}
			action = NewPrepareNetworkChange(fs, settingsService, fakeactions.NewFakeAgentKiller())
		})

		It("is synchronous", func() {
			Expect(action.IsAsynchronous()).To(BeFalse())
		})

		It("is not persistent", func() {
			Expect(action.IsPersistent()).To(BeFalse())
		})

		It("invalidates settings so that load settings cannot fall back on old settings", func() {
			resp, err := action.Run()
			Expect(err).NotTo(HaveOccurred())
			Expect(resp).To(Equal("ok"))

			Expect(settingsService.SettingsWereInvalidated).To(BeTrue())
		})

		Context("when settings invalidation succeeds", func() {
			Context("when the network rules file can be removed", func() {
				It("removes the network rules file", func() {
					fs.WriteFile("/etc/udev/rules.d/70-persistent-net.rules", []byte{})

					resp, err := action.Run()
					Expect(err).NotTo(HaveOccurred())
					Expect(resp).To(Equal("ok"))

					Expect(fs.FileExists("/etc/udev/rules.d/70-persistent-net.rules")).To(BeFalse())
				})
			})

			Context("when the network rules file cannot be removed", func() {
				BeforeEach(func() {
					fs.RemoveAllError = errors.New("fake-remove-all-error")
				})

				It("returns error from removing the network rules file", func() {
					resp, err := action.Run()
					Expect(err).To(HaveOccurred())
					Expect(err.Error()).To(ContainSubstring("fake-remove-all-error"))

					Expect(resp).To(BeNil())
				})
			})
		})

		Context("when settings invalidation fails", func() {
			BeforeEach(func() {
				settingsService.InvalidateSettingsError = errors.New("fake-invalidate-error")
			})

			It("returns error early if settings err invalidating", func() {
				resp, err := action.Run()
				Expect(err).To(HaveOccurred())
				Expect(err.Error()).To(ContainSubstring("fake-invalidate-error"))

				Expect(resp).To(BeNil())
			})

			It("does not remove the network rules file", func() {
				fs.WriteFile("/etc/udev/rules.d/70-persistent-net.rules", []byte{})

				action.Run()
				Expect(fs.FileExists("/etc/udev/rules.d/70-persistent-net.rules")).To(BeTrue())
			})
		})
	})
}

func describeCentosNetManager() {
	var (
		fs                            *fakesys.FakeFileSystem
		cmdRunner                     *fakesys.FakeCmdRunner
		ipResolver                    *fakeip.FakeResolver
		addressBroadcaster            *fakearp.FakeAddressBroadcaster
		netManager                    Manager
		interfaceConfigurationCreator InterfaceConfigurationCreator
	)

	BeforeEach(func() {
		fs = fakesys.NewFakeFileSystem()
		cmdRunner = fakesys.NewFakeCmdRunner()
		ipResolver = &fakeip.FakeResolver{}
		logger := boshlog.NewLogger(boshlog.LevelNone)
		interfaceConfigurationCreator = NewInterfaceConfigurationCreator(logger)
		addressBroadcaster = &fakearp.FakeAddressBroadcaster{}
		netManager = NewCentosNetManager(
			fs,
			cmdRunner,
			ipResolver,
			interfaceConfigurationCreator,
			addressBroadcaster,
			logger,
		)
	})

	writeNetworkDevice := func(iface string, macAddress string, isPhysical bool) string {
		interfacePath := fmt.Sprintf("/sys/class/net/%s", iface)
		fs.WriteFile(interfacePath, []byte{})
		if isPhysical {
			fs.WriteFile(fmt.Sprintf("/sys/class/net/%s/device", iface), []byte{})
		}
		fs.WriteFileString(fmt.Sprintf("/sys/class/net/%s/address", iface), fmt.Sprintf("%s\n", macAddress))

		return interfacePath
	}

	Describe("SetupNetworking", func() {
		var (
			dhcpNetwork                           boshsettings.Network
			staticNetwork                         boshsettings.Network
			expectedNetworkConfigurationForStatic string
			expectedNetworkConfigurationForDHCP   string
			expectedDhclientConfiguration         string
		)

		BeforeEach(func() {
			dhcpNetwork = boshsettings.Network{
				Type:    "dynamic",
				Default: []string{"dns"},
				DNS:     []string{"8.8.8.8", "9.9.9.9"},
				Mac:     "fake-dhcp-mac-address",
			}
			staticNetwork = boshsettings.Network{
				Type:    "manual",
				IP:      "1.2.3.4",
				Netmask: "255.255.255.0",
				Gateway: "3.4.5.6",
				Mac:     "fake-static-mac-address",
			}

			expectedNetworkConfigurationForStatic = `DEVICE=ethstatic
BOOTPROTO=static
IPADDR=1.2.3.4
NETMASK=255.255.255.0
BROADCAST=1.2.3.255
GATEWAY=3.4.5.6
ONBOOT=yes
PEERDNS=no
DNS1=8.8.8.8
DNS2=9.9.9.9
`

			expectedNetworkConfigurationForDHCP = `DEVICE=ethdhcp
BOOTPROTO=dhcp
ONBOOT=yes
PEERDNS=yes
`

			expectedDhclientConfiguration = `# Generated by bosh-agent

option rfc3442-classless-static-routes code 121 = array of unsigned integer 8;

send host-name "<hostname>";

request subnet-mask, broadcast-address, time-offset, routers,
	domain-name, domain-name-servers, domain-search, host-name,
	netbios-name-servers, netbios-scope, interface-mtu,
	rfc3442-classless-static-routes, ntp-servers;

prepend domain-name-servers 8.8.8.8, 9.9.9.9;
`
		})

		stubInterfacesWithVirtual := func(physicalInterfaces map[string]boshsettings.Network, virtualInterfaces []string) {
			interfacePaths := []string{}

			for iface, networkSettings := range physicalInterfaces {
				interfacePaths = append(interfacePaths, writeNetworkDevice(iface, networkSettings.Mac, true))
//.........這裏部分代碼省略.........

func describeUbuntuNetManager() {
	var (
		fs                            *fakesys.FakeFileSystem
		cmdRunner                     *fakesys.FakeCmdRunner
		ipResolver                    *fakeip.FakeResolver
		addressBroadcaster            *fakearp.FakeAddressBroadcaster
		netManager                    UbuntuNetManager
		interfaceConfigurationCreator InterfaceConfigurationCreator
	)

	writeNetworkDevice := func(iface string, macAddress string, isPhysical bool) string {
		interfacePath := fmt.Sprintf("/sys/class/net/%s", iface)
		fs.WriteFile(interfacePath, []byte{})
		if isPhysical {
			fs.WriteFile(fmt.Sprintf("/sys/class/net/%s/device", iface), []byte{})
		}
		fs.WriteFileString(fmt.Sprintf("/sys/class/net/%s/address", iface), fmt.Sprintf("%s\n", macAddress))

		return interfacePath
	}

	stubInterfacesWithVirtual := func(physicalInterfaces map[string]boshsettings.Network, virtualInterfaces []string) {
		interfacePaths := []string{}

		for iface, networkSettings := range physicalInterfaces {
			interfacePaths = append(interfacePaths, writeNetworkDevice(iface, networkSettings.Mac, true))
		}

		for _, iface := range virtualInterfaces {
			interfacePaths = append(interfacePaths, writeNetworkDevice(iface, "virtual", false))
		}

		fs.SetGlob("/sys/class/net/*", interfacePaths)
	}

	stubInterfaces := func(physicalInterfaces map[string]boshsettings.Network) {
		stubInterfacesWithVirtual(physicalInterfaces, nil)
	}

	BeforeEach(func() {
		fs = fakesys.NewFakeFileSystem()
		cmdRunner = fakesys.NewFakeCmdRunner()
		ipResolver = &fakeip.FakeResolver{}
		logger := boshlog.NewLogger(boshlog.LevelNone)
		interfaceConfigurationCreator = NewInterfaceConfigurationCreator(logger)
		addressBroadcaster = &fakearp.FakeAddressBroadcaster{}
		netManager = NewUbuntuNetManager(
			fs,
			cmdRunner,
			ipResolver,
			interfaceConfigurationCreator,
			addressBroadcaster,
			logger,
		).(UbuntuNetManager)
	})

	Describe("ComputeNetworkConfig", func() {
		Context("when there is one manual network and neither is marked as default for DNS", func() {
			It("should use the manual network for DNS", func() {
				networks := boshsettings.Networks{
					"manual": factory.Network{DNS: &[]string{"8.8.8.8"}}.Build(),
				}
				stubInterfaces(networks)
				_, _, dnsServers, err := netManager.ComputeNetworkConfig(networks)
				Expect(err).ToNot(HaveOccurred())
				Expect(dnsServers).To(Equal([]string{"8.8.8.8"}))
			})
		})

		Context("when there is a vip network and a manual network and neither is marked as default for DNS", func() {
			It("should use the manual network for DNS", func() {
				networks := boshsettings.Networks{
					"vip":    boshsettings.Network{Type: "vip"},
					"manual": factory.Network{Type: "manual", DNS: &[]string{"8.8.8.8"}}.Build(),
				}
				stubInterfaces(networks)
				_, _, dnsServers, err := netManager.ComputeNetworkConfig(networks)
				Expect(err).ToNot(HaveOccurred())
				Expect(dnsServers).To(Equal([]string{"8.8.8.8"}))
			})
		})
		Context("when there is a vip network and a manual network and the manual network is marked as default for DNS", func() {
			It("should use the manual network for DNS", func() {
				networks := boshsettings.Networks{
					"vip":    boshsettings.Network{Type: "vip"},
					"manual": factory.Network{Type: "manual", DNS: &[]string{"8.8.8.8"}, Default: []string{"dns"}}.Build(),
				}
				stubInterfaces(networks)
				_, _, dnsServers, err := netManager.ComputeNetworkConfig(networks)
				Expect(err).ToNot(HaveOccurred())
				Expect(dnsServers).To(Equal([]string{"8.8.8.8"}))
			})
		})

		Context("when specified more than one DNS", func() {
			It("extracts all DNS servers from the network configured as default DNS", func() {
				networks := boshsettings.Networks{
					"default": factory.Network{
						IP:      "10.10.0.32",
						Netmask: "255.255.255.0",
//.........這裏部分代碼省略.........

func init() {
	Describe("settingsService", func() {
		var (
			fs                         *fakesys.FakeFileSystem
			fakeDefaultNetworkResolver *fakenet.FakeDefaultNetworkResolver
			fakeSettingsSource         *fakes.FakeSettingsSource
		)

		BeforeEach(func() {
			fs = fakesys.NewFakeFileSystem()
			fakeDefaultNetworkResolver = &fakenet.FakeDefaultNetworkResolver{}
			fakeSettingsSource = &fakes.FakeSettingsSource{}
		})

		buildService := func() (Service, *fakesys.FakeFileSystem) {
			logger := boshlog.NewLogger(boshlog.LevelNone)
			service := NewService(fs, "/setting/path.json", fakeSettingsSource, fakeDefaultNetworkResolver, logger)
			return service, fs
		}

		Describe("LoadSettings", func() {
			var (
				fetchedSettings Settings
				fetcherFuncErr  error
				service         Service
			)

			BeforeEach(func() {
				fetchedSettings = Settings{}
				fetcherFuncErr = nil
			})

			JustBeforeEach(func() {
				fakeSettingsSource.SettingsValue = fetchedSettings
				fakeSettingsSource.SettingsErr = fetcherFuncErr
				service, fs = buildService()
			})

			Context("when settings fetcher succeeds fetching settings", func() {
				BeforeEach(func() {
					fetchedSettings = Settings{AgentID: "some-new-agent-id"}
				})

				Context("when settings contain at most one dynamic network", func() {
					BeforeEach(func() {
						fetchedSettings.Networks = Networks{
							"fake-net-1": Network{Type: NetworkTypeDynamic},
						}
					})

					It("updates the service with settings from the fetcher", func() {
						err := service.LoadSettings()
						Expect(err).NotTo(HaveOccurred())
						Expect(service.GetSettings().AgentID).To(Equal("some-new-agent-id"))
					})

					It("persists settings to the settings file", func() {
						err := service.LoadSettings()
						Expect(err).NotTo(HaveOccurred())

						json, err := json.Marshal(fetchedSettings)
						Expect(err).NotTo(HaveOccurred())

						fileContent, err := fs.ReadFile("/setting/path.json")
						Expect(err).NotTo(HaveOccurred())
						Expect(fileContent).To(Equal(json))
					})

					It("returns any error from writing to the setting file", func() {
						fs.WriteFileError = errors.New("fs-write-file-error")

						err := service.LoadSettings()
						Expect(err).To(HaveOccurred())
						Expect(err.Error()).To(ContainSubstring("fs-write-file-error"))
					})
				})
			})

			Context("when settings fetcher fails fetching settings", func() {
				BeforeEach(func() {
					fetcherFuncErr = errors.New("fake-fetch-error")
				})

				Context("when a settings file exists", func() {
					Context("when settings contain at most one dynamic network", func() {
						BeforeEach(func() {
							fs.WriteFile("/setting/path.json", []byte(`{
								"agent_id":"some-agent-id",
								"networks": {"fake-net-1": {"type": "dynamic"}}
							}`))

							fakeDefaultNetworkResolver.GetDefaultNetworkNetwork = Network{
								IP:      "fake-resolved-ip",
								Netmask: "fake-resolved-netmask",
								Gateway: "fake-resolved-gateway",
							}
						})

						It("returns settings from the settings file with resolved network", func() {
							err := service.LoadSettings()
//.........這裏部分代碼省略.........

//.........這裏部分代碼省略.........
					err := act()
					Expect(err).To(HaveOccurred())
					Expect(err.Error()).To(ContainSubstring("fake-decompress-error"))
				})

				It("returns error when walking the tree of files fails", func() {
					fs.WalkErr = errors.New("fake-walk-error")

					err := act()
					Expect(err).To(HaveOccurred())
					Expect(err.Error()).To(ContainSubstring("fake-walk-error"))
				})

				It("installs bundle from decompressed tmp path of a job template", func() {
					var installedBeforeDecompression bool

					compressor.DecompressFileToDirCallBack = func() {
						installedBeforeDecompression = bundle.Installed
					}

					err := act()
					Expect(err).ToNot(HaveOccurred())

					// bundle installation did not happen before decompression
					Expect(installedBeforeDecompression).To(BeFalse())

					// make sure that bundle install happened after decompression
					Expect(bundle.InstallSourcePath).To(Equal("/fake-tmp-dir/fake-path-in-archive"))
				})

				It("sets executable bit for the bin and config directories", func() {
					var binDirStats, configDirStats *fakesys.FakeFileStats
					compressor.DecompressFileToDirCallBack = func() {
						fs.WriteFile("/fake-tmp-dir/fake-path-in-archive/bin/blarg", []byte{})
						fs.WriteFile("/fake-tmp-dir/fake-path-in-archive/config/blarg.yml", []byte{})
					}

					bundle.InstallCallBack = func() {
						binDirStats = fs.GetFileTestStat("/fake-tmp-dir/fake-path-in-archive/bin")
						configDirStats = fs.GetFileTestStat("/fake-tmp-dir/fake-path-in-archive/config")
					}

					err := act()
					Expect(err).ToNot(HaveOccurred())

					Expect(int(binDirStats.FileMode)).To(Equal(0755))
					Expect(int(configDirStats.FileMode)).To(Equal(0755))
				})

				It("sets executable bit for files in bin", func() {
					compressor.DecompressFileToDirCallBack = func() {
						fs.WriteFile("/fake-tmp-dir/fake-path-in-archive/bin/test1", []byte{})
						fs.WriteFile("/fake-tmp-dir/fake-path-in-archive/bin/test2", []byte{})
						fs.WriteFile("/fake-tmp-dir/fake-path-in-archive/config/test", []byte{})
					}

					fs.SetGlob("/fake-tmp-dir/fake-path-in-archive/bin/*", []string{
						"/fake-tmp-dir/fake-path-in-archive/bin/test1",
						"/fake-tmp-dir/fake-path-in-archive/bin/test2",
					})

					var binTest1Stats, binTest2Stats, configTestStats *fakesys.FakeFileStats

					bundle.InstallCallBack = func() {
						binTest1Stats = fs.GetFileTestStat("/fake-tmp-dir/fake-path-in-archive/bin/test1")
						binTest2Stats = fs.GetFileTestStat("/fake-tmp-dir/fake-path-in-archive/bin/test2")

		It("returns path", func() {
			Expect(genericScript.Tag()).To(Equal("my-tag"))
		})
	})

	Describe("Path", func() {
		It("returns path", func() {
			Expect(genericScript.Path()).To(Equal("/path-to-script"))
		})
	})

	Describe("Exists", func() {
		It("returns bool", func() {
			Expect(genericScript.Exists()).To(BeFalse())

			fs.WriteFile("/path-to-script", []byte{})
			Expect(genericScript.Exists()).To(BeTrue())
		})
	})

	Describe("Run", func() {
		It("executes given command", func() {
			err := genericScript.Run()
			Expect(err).ToNot(HaveOccurred())
		})

		It("returns an error if it fails to create logs directory", func() {
			fs.MkdirAllError = errors.New("fake-mkdir-all-error")

			err := genericScript.Run()
			Expect(err).To(HaveOccurred())

	var (
		fs        *fakesys.FakeFileSystem
		cmdRunner *fakesys.FakeCmdRunner
		arping    AddressBroadcaster
	)

	BeforeEach(func() {
		fs = fakesys.NewFakeFileSystem()
		cmdRunner = fakesys.NewFakeCmdRunner()
		logger := boshlog.NewLogger(boshlog.LevelNone)
		arping = NewArping(cmdRunner, fs, logger, arpingIterations, 0, 0)
	})

	Describe("BroadcastMACAddresses", func() {
		BeforeEach(func() {
			fs.WriteFile("/sys/class/net/eth0", []byte{})
			fs.WriteFile("/sys/class/net/eth1", []byte{})
		})

		It("runs arping commands for each interface", func() {
			addresses := []boship.InterfaceAddress{
				boship.NewSimpleInterfaceAddress("eth0", "192.168.195.6"),
				boship.NewSimpleInterfaceAddress("eth1", "127.0.0.1"),
			}

			arping.BroadcastMACAddresses(addresses)

			countA := 0
			countB := 0

			a := []string{"arping", "-c", "1", "-U", "-I", "eth0", "192.168.195.6"}

		runner = NewFileLoggingCmdRunner(fs, cmdRunner, "/fake-base-dir", 15)

		cmd = boshsys.Command{
			Name:       "fake-cmd",
			Args:       []string{"fake-args"},
			Env:        map[string]string{"fake-env-key": "fake-env-var"},
			WorkingDir: "/fake-working-dir",
		}
	})

	Describe("RunCommand", func() {
		It("cleans logs directory", func() {
			err := fs.MkdirAll("/fake-base-dir/fake-log-dir-name/", os.FileMode(0750))
			Expect(err).ToNot(HaveOccurred())

			err = fs.WriteFile("/fake-base-dir/fake-log-dir-name/old-file", []byte("test-data"))
			Expect(err).ToNot(HaveOccurred())

			_, 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/old-file")).To(BeFalse())
		})

		It("returns an error if it fails to remove previous logs directory", func() {
			fs.RemoveAllError = errors.New("fake-remove-all-error")

			_, err := runner.RunCommand("fake-log-dir-name", "fake-log-file-name", cmd)
			Expect(err).To(HaveOccurred())
			Expect(err.Error()).To(ContainSubstring("fake-remove-all-error"))
		})