Golang FakeFileSystem.SymlinkError方法代碼示例

//.........這裏部分代碼省略.........

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;

`))
			dhcpConfigSymlink := fs.GetFileTestStat("/etc/dhcp/dhclient-ethdhcp.conf")
			Expect(dhcpConfigSymlink).ToNot(BeNil())
			Expect(dhcpConfigSymlink.SymlinkTarget).To(Equal("/etc/dhcp/dhclient.conf"))
		})

		It("returns an error if it can't write a dhcp configuration", func() {
			stubInterfaces(map[string]boshsettings.Network{
				"ethdhcp":   dhcpNetwork,
				"ethstatic": staticNetwork,
			})

			fs.WriteFileErrors["/etc/dhcp/dhclient.conf"] = errors.New("dhclient.conf-write-error")

			err := netManager.SetupNetworking(boshsettings.Networks{"dhcp-network": dhcpNetwork, "static-network": staticNetwork}, nil)
			Expect(err).To(HaveOccurred())
			Expect(err.Error()).To(ContainSubstring("dhclient.conf-write-error"))
		})

		It("returns an error if it can't symlink a dhcp configuration", func() {
			stubInterfaces(map[string]boshsettings.Network{
				"ethdhcp":   dhcpNetwork,
				"ethstatic": staticNetwork,
			})

			fs.SymlinkError = errors.New("dhclient-ethdhcp.conf-symlink-error")

			err := netManager.SetupNetworking(boshsettings.Networks{"dhcp-network": dhcpNetwork, "static-network": staticNetwork}, nil)
			Expect(err).To(HaveOccurred())
			Expect(err.Error()).To(ContainSubstring("dhclient-ethdhcp.conf-symlink-error"))
		})

		It("doesn't write a dhcp configuration if there are no dhcp networks", func() {
			stubInterfaces(map[string]boshsettings.Network{
				"ethstatic": staticNetwork,
			})

			err := netManager.SetupNetworking(boshsettings.Networks{"static-network": staticNetwork}, nil)
			Expect(err).ToNot(HaveOccurred())

			dhcpConfig := fs.GetFileTestStat("/etc/dhcp/dhclient-ethdhcp.conf")
			Expect(dhcpConfig).To(BeNil())
		})

		It("restarts the networks if any ifconfig file changes", func() {
			changingStaticNetwork := boshsettings.Network{
				Type:    "manual",
				IP:      "1.2.3.5",
				Netmask: "255.255.255.0",
				Gateway: "3.4.5.6",
				Mac:     "ethstatict-that-changes",
			}

			stubInterfaces(map[string]boshsettings.Network{
				"ethdhcp":                dhcpNetwork,
				"ethstatic-that-changes": changingStaticNetwork,
				"ethstatic":              staticNetwork,
			})

			It("returns error", func() {
				_, _, err := fileBundle.Install(sourcePath)
				Expect(err).NotTo(HaveOccurred())
				fs.MkdirAllError = errors.New("fake-mkdirall-error")

				_, _, err = fileBundle.Enable()
				Expect(err).To(HaveOccurred())
				Expect(err.Error()).To(ContainSubstring("fake-mkdirall-error"))
			})
		})

		Context("when bundle cannot be enabled", func() {
			It("returns error", func() {
				_, _, err := fileBundle.Install(sourcePath)
				Expect(err).NotTo(HaveOccurred())
				fs.SymlinkError = errors.New("fake-symlink-error")

				_, _, err = fileBundle.Enable()
				Expect(err).To(HaveOccurred())
				Expect(err.Error()).To(ContainSubstring("fake-symlink-error"))
			})
		})
	})

	Describe("Disable", func() {
		It("is idempotent", func() {
			err := fileBundle.Disable()
			Expect(err).NotTo(HaveOccurred())

			err = fileBundle.Disable()
			Expect(err).NotTo(HaveOccurred())

//.........這裏部分代碼省略.........
						err = fs.WriteFileString("/etc/resolv.conf", "fake-content")
						Expect(err).ToNot(HaveOccurred())
					})

					It("copies /etc/resolv.conf to .../resolv.conf.d/base", func() {
						err := netManager.SetupNetworking(networks, nil)
						Expect(err).ToNot(HaveOccurred())

						contents, err := fs.ReadFile("/etc/resolvconf/resolv.conf.d/base")
						Expect(err).ToNot(HaveOccurred())
						Expect(string(contents)).To(Equal("fake-content"))
					})

					Context("when copying fails", func() {
						It("fails reporting the error", func() {
							fs.CopyFileError = errors.New("fake-copy-error")

							err := netManager.SetupNetworking(networks, nil)
							Expect(err).To(HaveOccurred())
							Expect(err.Error()).To(ContainSubstring("Copying /etc/resolv.conf for backwards compat"))
						})
					})
				})
			})

			It("forces /etc/resolv.conf to be a symlink", func() {
				err := netManager.SetupNetworking(networks, nil)
				Expect(err).ToNot(HaveOccurred())
				Expect(fs.ReadLink("/etc/resolv.conf")).To(Equal("/run/resolvconf/resolv.conf"))
			})

			Context("when symlink command fails", func() {
				BeforeEach(func() {
					fs.SymlinkError = errors.New("fake-symlink-error")
				})

				It("fails reporting error", func() {
					err := netManager.SetupNetworking(networks, nil)
					Expect(err).To(HaveOccurred())
					Expect(err.Error()).To(ContainSubstring("Setting up /etc/resolv.conf symlink"))
				})
			})

			It("writes dns servers in /etc/resolvconf/resolv.conf.d/base", func() {
				dhcpNetwork.Preconfigured = true
				staticNetwork.Preconfigured = true
				networks := boshsettings.Networks{
					"first":  dhcpNetwork,
					"second": staticNetwork,
				}

				Expect(networks.IsPreconfigured()).To(BeTrue())

				err := netManager.SetupNetworking(networks, nil)
				Expect(err).ToNot(HaveOccurred())

				resolvConfHead := fs.GetFileTestStat("/etc/resolvconf/resolv.conf.d/base")
				Expect(resolvConfHead).ToNot(BeNil())

				expectedResolvConfHead = `# Generated by bosh-agent
nameserver 8.8.8.8
nameserver 9.9.9.9
`
				Expect(resolvConfHead.StringContents()).To(Equal(expectedResolvConfHead))
			})