Describe("Setup", func() {
It("brings up the loopback adapter in the sandbox namespace", func() {
sbNamespace.ExecuteStub = func(callback func(*os.File) error) error {
Expect(linkFactory.SetUpCallCount()).To(Equal(0))
err := callback(nil)
Expect(linkFactory.SetUpCallCount()).To(Equal(1))
return err
}
err := sb.Setup()
Expect(err).NotTo(HaveOccurred())
Expect(sbNamespace.ExecuteCallCount()).To(Equal(1))
Expect(linkFactory.SetUpCallCount()).To(Equal(1))
linkName := linkFactory.SetUpArgsForCall(0)
Expect(linkName).To(Equal("lo"))
})
Context("when namespace execution fails", func() {
BeforeEach(func() {
sbNamespace.ExecuteReturns(errors.New("boysenberry"))
})
It("returns a meaningful error", func() {
err := sb.Setup()
Expect(err).To(MatchError("setup failed: boysenberry"))
})
})
Context("when setting the link up fails", func() {
Expect(address.IP.String()).To(Equal("10.10.10.10"))
})
It("ups the dummy device in the sandbox namespace", func() {
ns.ExecuteStub = func(callback func(*os.File) error) error {
Expect(linkFactory.SetUpCallCount()).To(Equal(0))
err := callback(nil)
Expect(linkFactory.SetUpCallCount()).To(Equal(1))
return err
}
err := startDNS.Execute(context)
Expect(err).NotTo(HaveOccurred())
Expect(linkFactory.SetUpCallCount()).To(Equal(1))
Expect(linkFactory.SetUpArgsForCall(0)).To(Equal("dns0"))
})
It("creates a listener in the sandbox namespace", func() {
ns.ExecuteStub = func(callback func(*os.File) error) error {
Expect(listenerFactory.ListenUDPCallCount()).To(Equal(0))
err := callback(nil)
Expect(listenerFactory.ListenUDPCallCount()).To(Equal(1))
return err
}
expectedAddress, err := net.ResolveUDPAddr("udp", "10.10.10.10:53")
Expect(err).NotTo(HaveOccurred())
err = startDNS.Execute(context)
BeforeEach(func() {
context = &fakes.Context{}
linkFactory = &fakes.LinkFactory{}
context.LinkFactoryReturns(linkFactory)
setLinkUp = commands.SetLinkUp{
LinkName: "link-name",
}
})
It("sets the link up", func() {
err := setLinkUp.Execute(context)
Expect(err).NotTo(HaveOccurred())
Expect(linkFactory.SetUpCallCount()).To(Equal(1))
Expect(linkFactory.SetUpArgsForCall(0)).To(Equal("link-name"))
})
Context("when setting the link UP fails", func() {
It("wraps and propagates the error", func() {
linkFactory.SetUpReturns(errors.New("welp"))
err := setLinkUp.Execute(context)
Expect(err).To(MatchError("set link up: welp"))
})
})
Describe("String", func() {
It("describes itself", func() {
Expect(setLinkUp.String()).To(Equal("ip link set link-name up"))
})