})
Context("when the layer is retained", func() {
JustBeforeEach(func() {
retainer.Retain(lagertest.NewTestLogger(""), layercake.DockerImageID("child"))
})
It("should not remove the layer", func() {
Expect(gc.GC(logger, fakeCake)).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.GC(logger, fakeCake)).To(MatchError("cake failure"))
})
})
})
Context("when the layer has a parent", func() {
BeforeEach(func() {
child2parent[layercake.DockerImageID("child")] = layercake.DockerImageID("parent")
})
Context("and the parent has no other children", func() {
It("removes the layer, and its parent", func() {
Expect(gc.GC(logger, fakeCake)).To(Succeed())
Expect(fakeCake.RemoveCallCount()).To(Equal(2))
testImage := &image.Image{Parent: "this-parent"}
cake.GetReturns(testImage, nil)
img, err := aufsCake.Get(childID)
Expect(cake.GetCallCount()).To(Equal(1))
Expect(cake.GetArgsForCall(0)).To(Equal(childID))
Expect(err).To(BeNil())
Expect(img).To(Equal(testImage))
})
})
})
Describe("Remove", func() {
Context("when the image ID is not namespaced", func() {
It("should return the error when cake fails", func() {
cake.RemoveReturns(testError)
Expect(aufsCake.Remove(childID)).To(Equal(testError))
})
It("should delegate to the cake", func() {
Expect(aufsCake.Remove(childID)).To(Succeed())
Expect(cake.RemoveCallCount()).To(Equal(1))
Expect(cake.RemoveArgsForCall(0)).To(Equal(childID))
})
})
Context("when the image ID is namespaced", func() {
var (
parentDir string
namespacedChildDir string
otherNamespacedChildDir string