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rebase_test.go
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rebase_test.go
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package pack
import (
"bytes"
"context"
"testing"
"github.com/buildpacks/imgutil/fakes"
"github.com/heroku/color"
"github.com/sclevine/spec"
"github.com/sclevine/spec/report"
ifakes "github.com/buildpacks/pack/internal/fakes"
"github.com/buildpacks/pack/internal/logging"
h "github.com/buildpacks/pack/testhelpers"
)
func TestRebase(t *testing.T) {
color.Disable(true)
defer color.Disable(false)
spec.Run(t, "rebase_factory", testRebase, spec.Parallel(), spec.Report(report.Terminal{}))
}
func testRebase(t *testing.T, when spec.G, it spec.S) {
when("#Rebase", func() {
var (
fakeImageFetcher *ifakes.FakeImageFetcher
subject *Client
fakeAppImage *fakes.Image
fakeRunImage *fakes.Image
fakeRunImageMirror *fakes.Image
out bytes.Buffer
)
it.Before(func() {
fakeImageFetcher = ifakes.NewFakeImageFetcher()
fakeAppImage = fakes.NewImage("some/app", "", &fakeIdentifier{name: "app-image"})
h.AssertNil(t, fakeAppImage.SetLabel("io.buildpacks.lifecycle.metadata",
`{"stack":{"runImage":{"image":"some/run", "mirrors":["example.com/some/run"]}}}`))
h.AssertNil(t, fakeAppImage.SetLabel("io.buildpacks.stack.id", "io.buildpacks.stacks.bionic"))
fakeImageFetcher.LocalImages["some/app"] = fakeAppImage
fakeRunImage = fakes.NewImage("some/run", "run-image-top-layer-sha", &fakeIdentifier{name: "run-image-digest"})
h.AssertNil(t, fakeRunImage.SetLabel("io.buildpacks.stack.id", "io.buildpacks.stacks.bionic"))
fakeImageFetcher.LocalImages["some/run"] = fakeRunImage
fakeRunImageMirror = fakes.NewImage("example.com/some/run", "mirror-top-layer-sha", &fakeIdentifier{name: "mirror-digest"})
h.AssertNil(t, fakeRunImageMirror.SetLabel("io.buildpacks.stack.id", "io.buildpacks.stacks.bionic"))
fakeImageFetcher.LocalImages["example.com/some/run"] = fakeRunImageMirror
fakeLogger := logging.NewLogWithWriters(&out, &out)
subject = &Client{
logger: fakeLogger,
imageFetcher: fakeImageFetcher,
}
})
it.After(func() {
fakeAppImage.Cleanup()
fakeRunImage.Cleanup()
fakeRunImageMirror.Cleanup()
})
when("#Rebase", func() {
when("run image is provided by the user", func() {
when("the image has a label with a run image specified", func() {
var fakeCustomRunImage *fakes.Image
it.Before(func() {
fakeCustomRunImage = fakes.NewImage("custom/run", "custom-base-top-layer-sha", &fakeIdentifier{name: "custom-base-digest"})
h.AssertNil(t, fakeCustomRunImage.SetLabel("io.buildpacks.stack.id", "io.buildpacks.stacks.bionic"))
fakeImageFetcher.LocalImages["custom/run"] = fakeCustomRunImage
})
it.After(func() {
fakeCustomRunImage.Cleanup()
})
it("uses the run image provided by the user", func() {
h.AssertNil(t, subject.Rebase(context.TODO(),
RebaseOptions{
RunImage: "custom/run",
RepoName: "some/app",
}))
h.AssertEq(t, fakeAppImage.Base(), "custom/run")
lbl, _ := fakeAppImage.Label("io.buildpacks.lifecycle.metadata")
h.AssertContains(t, lbl, `"runImage":{"topLayer":"custom-base-top-layer-sha","reference":"custom-base-digest"`)
})
})
})
when("run image is NOT provided by the user", func() {
when("the image has a label with a run image specified", func() {
it("uses the run image provided in the App image label", func() {
h.AssertNil(t, subject.Rebase(context.TODO(), RebaseOptions{
RepoName: "some/app",
}))
h.AssertEq(t, fakeAppImage.Base(), "some/run")
lbl, _ := fakeAppImage.Label("io.buildpacks.lifecycle.metadata")
h.AssertContains(t, lbl, `"runImage":{"topLayer":"run-image-top-layer-sha","reference":"run-image-digest"`)
})
})
when("the image has a label with a run image mirrors specified", func() {
when("there are no user provided mirrors", func() {
it.Before(func() {
fakeImageFetcher.LocalImages["example.com/some/app"] = fakeAppImage
})
it("chooses a matching mirror from the app image label", func() {
h.AssertNil(t, subject.Rebase(context.TODO(), RebaseOptions{
RepoName: "example.com/some/app",
}))
h.AssertEq(t, fakeAppImage.Base(), "example.com/some/run")
lbl, _ := fakeAppImage.Label("io.buildpacks.lifecycle.metadata")
h.AssertContains(t, lbl, `"runImage":{"topLayer":"mirror-top-layer-sha","reference":"mirror-digest"`)
})
})
when("there are user provided mirrors", func() {
var (
fakeLocalMirror *fakes.Image
)
it.Before(func() {
fakeImageFetcher.LocalImages["example.com/some/app"] = fakeAppImage
fakeLocalMirror = fakes.NewImage("example.com/some/local-run", "local-mirror-top-layer-sha", &fakeIdentifier{name: "local-mirror-digest"})
h.AssertNil(t, fakeLocalMirror.SetLabel("io.buildpacks.stack.id", "io.buildpacks.stacks.bionic"))
fakeImageFetcher.LocalImages["example.com/some/local-run"] = fakeLocalMirror
})
it.After(func() {
fakeLocalMirror.Cleanup()
})
it("chooses a matching local mirror first", func() {
h.AssertNil(t, subject.Rebase(context.TODO(), RebaseOptions{
RepoName: "example.com/some/app",
AdditionalMirrors: map[string][]string{
"some/run": {"example.com/some/local-run"},
},
}))
h.AssertEq(t, fakeAppImage.Base(), "example.com/some/local-run")
lbl, _ := fakeAppImage.Label("io.buildpacks.lifecycle.metadata")
h.AssertContains(t, lbl, `"runImage":{"topLayer":"local-mirror-top-layer-sha","reference":"local-mirror-digest"`)
})
})
})
when("the image does not have a label with a run image specified", func() {
it("returns an error", func() {
h.AssertNil(t, fakeAppImage.SetLabel("io.buildpacks.lifecycle.metadata", "{}"))
err := subject.Rebase(context.TODO(), RebaseOptions{
RepoName: "some/app",
})
h.AssertError(t, err, "run image must be specified")
})
})
})
when("publish", func() {
var (
fakeRemoteRunImage *fakes.Image
)
it.Before(func() {
fakeRemoteRunImage = fakes.NewImage("some/run", "remote-top-layer-sha", &fakeIdentifier{name: "remote-digest"})
h.AssertNil(t, fakeRemoteRunImage.SetLabel("io.buildpacks.stack.id", "io.buildpacks.stacks.bionic"))
fakeImageFetcher.RemoteImages["some/run"] = fakeRemoteRunImage
})
it.After(func() {
fakeRemoteRunImage.Cleanup()
})
when("is false", func() {
when("skip pull is false", func() {
it("updates the local image", func() {
h.AssertNil(t, subject.Rebase(context.TODO(), RebaseOptions{
RepoName: "some/app",
SkipPull: false,
}))
h.AssertEq(t, fakeAppImage.Base(), "some/run")
lbl, _ := fakeAppImage.Label("io.buildpacks.lifecycle.metadata")
h.AssertContains(t, lbl, `"runImage":{"topLayer":"remote-top-layer-sha","reference":"remote-digest"`)
})
})
when("skip pull is true", func() {
it("uses local image", func() {
h.AssertNil(t, subject.Rebase(context.TODO(), RebaseOptions{
RepoName: "some/app",
SkipPull: true,
}))
h.AssertEq(t, fakeAppImage.Base(), "some/run")
lbl, _ := fakeAppImage.Label("io.buildpacks.lifecycle.metadata")
h.AssertContains(t, lbl, `"runImage":{"topLayer":"run-image-top-layer-sha","reference":"run-image-digest"`)
})
})
})
when("is true", func() {
it.Before(func() {
fakeImageFetcher.RemoteImages["some/app"] = fakeAppImage
})
when("skip pull is anything", func() {
it("uses remote image", func() {
h.AssertNil(t, subject.Rebase(context.TODO(), RebaseOptions{
RepoName: "some/app",
Publish: true,
}))
h.AssertEq(t, fakeAppImage.Base(), "some/run")
lbl, _ := fakeAppImage.Label("io.buildpacks.lifecycle.metadata")
h.AssertContains(t, lbl, `"runImage":{"topLayer":"remote-top-layer-sha","reference":"remote-digest"`)
})
})
})
})
})
})
}
type fakeIdentifier struct {
name string
}
func (f *fakeIdentifier) String() string {
return f.name
}