err := configurer.Apply(config, netnsFD)
Expect(err).To(HaveOccurred())
Expect(err).To(MatchError(&configure.VethPairCreationError{Cause: vethCreator.CreateReturns.Err, HostIfcName: "host", ContainerIfcName: "container"}))
})
})
Context("when creating the pair succeeds", func() {
BeforeEach(func() {
vethCreator.CreateReturns.Host = &net.Interface{Name: "the-host"}
vethCreator.CreateReturns.Container = &net.Interface{Name: "the-container"}
})
It("should set mtu on the host interface", func() {
config.HostIntf = "host"
config.BridgeName = "bridge"
config.Mtu = 123
Expect(configurer.Apply(config, netnsFD)).To(Succeed())
Expect(linkConfigurer.SetMTUCalledWith.Interface).To(Equal(vethCreator.CreateReturns.Host))
Expect(linkConfigurer.SetMTUCalledWith.MTU).To(Equal(123))
})
Context("When setting the mtu fails", func() {
It("returns a wrapped error", func() {
config.HostIntf = "host"
config.BridgeName = "bridge"
config.ContainerIntf = "container"
config.Mtu = 14
linkConfigurer.SetMTUReturns = errors.New("o no")
err := configurer.Apply(config, netnsFD)
Expect(err).To(MatchError(&configure.MTUError{Cause: linkConfigurer.SetMTUReturns, Intf: vethCreator.CreateReturns.Host, MTU: 14}))
if iface.Name == "foo" {
return cause
}
return nil
}
config.ContainerIntf = "foo"
err := configurer.Apply(config)
Expect(err).To(MatchError(&configure.LinkUpError{Cause: cause, Link: &net.Interface{Name: "foo"}, Role: "container"}))
})
})
It("sets the mtu", func() {
config.ContainerIntf = "foo"
config.Mtu = 1234
Expect(configurer.Apply(config)).To(Succeed())
Expect(linkApplyr.SetMTUCalledWith.Interface).To(Equal(&net.Interface{Name: "foo"}))
Expect(linkApplyr.SetMTUCalledWith.MTU).To(Equal(1234))
})
Context("when setting the mtu fails", func() {
It("returns a wrapped error", func() {
linkApplyr.SetMTUReturns = errors.New("this is NOT the right potato")
config.ContainerIntf = "foo"
config.Mtu = 1234
err := configurer.Apply(config)
Expect(err).To(MatchError(&configure.MTUError{Cause: linkApplyr.SetMTUReturns, Intf: &net.Interface{Name: "foo"}, MTU: 1234}))
})
})