}
})
It("uses the link factory to create the veth pair", func() {
err := createVeth.Execute(context)
Expect(err).NotTo(HaveOccurred())
name, peerName, mtu := linkFactory.CreateVethArgsForCall(0)
Expect(name).To(Equal("if-name"))
Expect(peerName).To(Equal("peer-if-name"))
Expect(mtu).To(Equal(99))
})
Context("when creating the link fails", func() {
BeforeEach(func() {
linkFactory.CreateVethReturns(errors.New("welp"))
})
It("wraps and propogates the error", func() {
err := createVeth.Execute(context)
Expect(err).To(MatchError("create veth: welp"))
})
})
Describe("String", func() {
It("is self describing", func() {
Expect(createVeth.String()).To(Equal("ip link add dev if-name mtu 99 type veth peer name peer-if-name mtu 99"))
})
})
})