})
Context("when creating the dummy link fails", func() {
BeforeEach(func() {
linkFactory.CreateDummyReturns(errors.New("pineapple"))
})
It("returns a meaningful error", func() {
err := startDNS.Execute(context)
Expect(err).To(MatchError("namespace execute: create dummy: pineapple"))
})
})
Context("when adding the address fails", func() {
BeforeEach(func() {
addressManager.AddAddressReturns(errors.New("pineapple"))
})
It("returns a meaningful error", func() {
err := startDNS.Execute(context)
Expect(err).To(MatchError("namespace execute: add address: pineapple"))
})
})
Context("when setting the link up fails", func() {
BeforeEach(func() {
linkFactory.SetUpReturns(errors.New("pineapple"))
})
It("returns a meaningful error", func() {
err := startDNS.Execute(context)
}
})
It("adds the address to the interface", func() {
err := addAddress.Execute(context)
Expect(err).NotTo(HaveOccurred())
Expect(addressManager.AddAddressCallCount()).To(Equal(1))
interfaceName, address := addressManager.AddAddressArgsForCall(0)
Expect(interfaceName).To(Equal("my-interface"))
Expect(address.String()).To(Equal("192.168.1.1/24"))
})
Context("when adding the address fails", func() {
BeforeEach(func() {
addressManager.AddAddressReturns(errors.New("no address for you"))
})
It("wraps and propagates the error", func() {
err := addAddress.Execute(context)
Expect(err).To(MatchError("add address: no address for you"))
})
})
Describe("String", func() {
It("describes itself", func() {
Expect(addAddress.String()).To(Equal("ip addr add 192.168.1.1/24 dev my-interface"))
})
})
})