Context("when the layer is retained", func() {
BeforeEach(func() {
fakeRetainer.IsHeldReturns(true)
})
It("should not remove the layer", func() {
Expect(gc.Remove(layercake.ContainerID("child"))).To(Succeed())
Expect(fakeCake.RemoveCallCount()).To(Equal(0))
})
})
})
Context("when removing fails", func() {
It("returns an error", func() {
fakeCake.RemoveReturns(errors.New("cake failure"))
Expect(gc.Remove(layercake.ContainerID("whatever"))).To(MatchError("cake failure"))
})
})
Context("when the layer has a parent", func() {
BeforeEach(func() {
child2parent[layercake.ContainerID("child")] = layercake.DockerImageID("parent")
})
Context("and the parent has no other children", func() {
It("removes the layer, and its parent", func() {
Expect(gc.Remove(layercake.ContainerID("child"))).To(Succeed())
Expect(fakeCake.RemoveCallCount()).To(Equal(2))
Expect(fakeCake.RemoveArgsForCall(0)).To(Equal(layercake.ContainerID("child")))
Context("when graphdriver fails to get layer path", func() {
BeforeEach(func() {
graphDriverErr = errors.New("graphdriver fail!")
})
It("returns the same error", func() {
Expect(cleaner.Remove(layerId)).To(MatchError("graphdriver fail!"))
})
It("doesnt call the delegate", func() {
Expect(fakeCake.RemoveCallCount()).To(Equal(0))
})
})
It("delegates to the delegate", func() {
Expect(cleaner.Remove(layerId)).To(Succeed())
Expect(fakeCake.RemoveCallCount()).To(Equal(1))
})
Context("when the delegate fails", func() {
BeforeEach(func() {
fakeCake.RemoveReturns(errors.New("o no!"))
})
It("returns the same error", func() {
Expect(cleaner.Remove(layerId)).To(MatchError("o no!"))
})
})
})