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fetcher_test.go
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fetcher_test.go
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package image_test
import (
"bytes"
"context"
"fmt"
"math/rand"
"os"
"testing"
"time"
"github.com/buildpacks/imgutil/local"
"github.com/buildpacks/imgutil/remote"
"github.com/docker/docker/client"
"github.com/google/go-containerregistry/pkg/authn"
"github.com/heroku/color"
"github.com/sclevine/spec"
"github.com/sclevine/spec/report"
"github.com/buildpacks/pack/pkg/image"
"github.com/buildpacks/pack/pkg/logging"
h "github.com/buildpacks/pack/testhelpers"
)
var docker client.CommonAPIClient
var registryConfig *h.TestRegistryConfig
func TestFetcher(t *testing.T) {
rand.Seed(time.Now().UTC().UnixNano())
color.Disable(true)
defer color.Disable(false)
h.RequireDocker(t)
registryConfig = h.RunRegistry(t)
defer registryConfig.StopRegistry(t)
// TODO: is there a better solution to the auth problem?
os.Setenv("DOCKER_CONFIG", registryConfig.DockerConfigDir)
var err error
docker, err = client.NewClientWithOpts(client.FromEnv, client.WithVersion("1.38"))
h.AssertNil(t, err)
spec.Run(t, "Fetcher", testFetcher, spec.Report(report.Terminal{}))
}
func testFetcher(t *testing.T, when spec.G, it spec.S) {
var (
imageFetcher *image.Fetcher
repoName string
repo string
outBuf bytes.Buffer
)
it.Before(func() {
repo = "some-org/" + h.RandString(10)
repoName = registryConfig.RepoName(repo)
imageFetcher = image.NewFetcher(logging.NewLogWithWriters(&outBuf, &outBuf), docker)
})
when("#Fetch", func() {
when("daemon is false", func() {
when("PullAlways", func() {
when("there is a remote image", func() {
it.Before(func() {
img, err := remote.NewImage(repoName, authn.DefaultKeychain)
h.AssertNil(t, err)
h.AssertNil(t, img.Save())
})
it("returns the remote image", func() {
_, err := imageFetcher.Fetch(context.TODO(), repoName, image.FetchOptions{Daemon: false, PullPolicy: image.PullAlways})
h.AssertNil(t, err)
})
})
when("there is no remote image", func() {
it("returns an error", func() {
_, err := imageFetcher.Fetch(context.TODO(), repoName, image.FetchOptions{Daemon: false, PullPolicy: image.PullAlways})
h.AssertError(t, err, fmt.Sprintf("image '%s' does not exist in registry", repoName))
})
})
})
when("PullIfNotPresent", func() {
when("there is a remote image", func() {
it.Before(func() {
img, err := remote.NewImage(repoName, authn.DefaultKeychain)
h.AssertNil(t, err)
h.AssertNil(t, img.Save())
})
it("returns the remote image", func() {
_, err := imageFetcher.Fetch(context.TODO(), repoName, image.FetchOptions{Daemon: false, PullPolicy: image.PullIfNotPresent})
h.AssertNil(t, err)
})
})
when("there is no remote image", func() {
it("returns an error", func() {
_, err := imageFetcher.Fetch(context.TODO(), repoName, image.FetchOptions{Daemon: false, PullPolicy: image.PullIfNotPresent})
h.AssertError(t, err, fmt.Sprintf("image '%s' does not exist in registry", repoName))
})
})
})
})
when("daemon is true", func() {
when("PullNever", func() {
when("there is a local image", func() {
it.Before(func() {
// Make sure the repoName is not a valid remote repo.
// This is to verify that no remote check is made
// when there's a valid local image.
repoName = "invalidhost" + repoName
img, err := local.NewImage(repoName, docker)
h.AssertNil(t, err)
h.AssertNil(t, img.Save())
})
it.After(func() {
h.DockerRmi(docker, repoName)
})
it("returns the local image", func() {
_, err := imageFetcher.Fetch(context.TODO(), repoName, image.FetchOptions{Daemon: true, PullPolicy: image.PullNever})
h.AssertNil(t, err)
})
})
when("there is no local image", func() {
it("returns an error", func() {
_, err := imageFetcher.Fetch(context.TODO(), repoName, image.FetchOptions{Daemon: true, PullPolicy: image.PullNever})
h.AssertError(t, err, fmt.Sprintf("image '%s' does not exist on the daemon", repoName))
})
})
})
when("PullAlways", func() {
when("there is a remote image", func() {
var (
logger *logging.LogWithWriters
output func() string
)
it.Before(func() {
// Instantiate a pull-able local image
// as opposed to a remote image so that the image
// is created with the OS of the docker daemon
img, err := local.NewImage(repoName, docker)
h.AssertNil(t, err)
defer h.DockerRmi(docker, repoName)
h.AssertNil(t, img.Save())
h.AssertNil(t, h.PushImage(docker, img.Name(), registryConfig))
var outCons *color.Console
outCons, output = h.MockWriterAndOutput()
logger = logging.NewLogWithWriters(outCons, outCons)
imageFetcher = image.NewFetcher(logger, docker)
})
it.After(func() {
h.DockerRmi(docker, repoName)
})
it("pull the image and return the local copy", func() {
_, err := imageFetcher.Fetch(context.TODO(), repoName, image.FetchOptions{Daemon: true, PullPolicy: image.PullAlways})
h.AssertNil(t, err)
h.AssertNotEq(t, output(), "")
})
it("doesn't log anything in quiet mode", func() {
logger.WantQuiet(true)
_, err := imageFetcher.Fetch(context.TODO(), repoName, image.FetchOptions{Daemon: true, PullPolicy: image.PullAlways})
h.AssertNil(t, err)
h.AssertEq(t, output(), "")
})
})
when("there is no remote image", func() {
when("there is a local image", func() {
it.Before(func() {
img, err := local.NewImage(repoName, docker)
h.AssertNil(t, err)
h.AssertNil(t, img.Save())
})
it.After(func() {
h.DockerRmi(docker, repoName)
})
it("returns the local image", func() {
_, err := imageFetcher.Fetch(context.TODO(), repoName, image.FetchOptions{Daemon: true, PullPolicy: image.PullAlways})
h.AssertNil(t, err)
})
})
when("there is no local image", func() {
it("returns an error", func() {
_, err := imageFetcher.Fetch(context.TODO(), repoName, image.FetchOptions{Daemon: true, PullPolicy: image.PullAlways})
h.AssertError(t, err, fmt.Sprintf("image '%s' does not exist on the daemon", repoName))
})
})
})
when("image platform is specified", func() {
it("passes the platform argument to the daemon", func() {
_, err := imageFetcher.Fetch(context.TODO(), repoName, image.FetchOptions{Daemon: true, PullPolicy: image.PullAlways, Platform: "some-unsupported-platform"})
h.AssertError(t, err, "unknown operating system or architecture")
})
})
})
when("PullIfNotPresent", func() {
when("there is a remote image", func() {
var (
label = "label"
remoteImgLabel string
)
it.Before(func() {
// Instantiate a pull-able local image
// as opposed to a remote image so that the image
// is created with the OS of the docker daemon
remoteImg, err := local.NewImage(repoName, docker)
h.AssertNil(t, err)
defer h.DockerRmi(docker, repoName)
h.AssertNil(t, remoteImg.SetLabel(label, "1"))
h.AssertNil(t, remoteImg.Save())
h.AssertNil(t, h.PushImage(docker, remoteImg.Name(), registryConfig))
remoteImgLabel, err = remoteImg.Label(label)
h.AssertNil(t, err)
})
it.After(func() {
h.DockerRmi(docker, repoName)
})
when("there is a local image", func() {
var localImgLabel string
it.Before(func() {
localImg, err := local.NewImage(repoName, docker)
h.AssertNil(t, localImg.SetLabel(label, "2"))
h.AssertNil(t, err)
h.AssertNil(t, localImg.Save())
localImgLabel, err = localImg.Label(label)
h.AssertNil(t, err)
})
it.After(func() {
h.DockerRmi(docker, repoName)
})
it("returns the local image", func() {
fetchedImg, err := imageFetcher.Fetch(context.TODO(), repoName, image.FetchOptions{Daemon: true, PullPolicy: image.PullIfNotPresent})
h.AssertNil(t, err)
h.AssertNotContains(t, outBuf.String(), "Pulling image")
fetchedImgLabel, err := fetchedImg.Label(label)
h.AssertNil(t, err)
h.AssertEq(t, fetchedImgLabel, localImgLabel)
h.AssertNotEq(t, fetchedImgLabel, remoteImgLabel)
})
})
when("there is no local image", func() {
it("returns the remote image", func() {
fetchedImg, err := imageFetcher.Fetch(context.TODO(), repoName, image.FetchOptions{Daemon: true, PullPolicy: image.PullIfNotPresent})
h.AssertNil(t, err)
fetchedImgLabel, err := fetchedImg.Label(label)
h.AssertNil(t, err)
h.AssertEq(t, fetchedImgLabel, remoteImgLabel)
})
})
})
when("there is no remote image", func() {
when("there is a local image", func() {
it.Before(func() {
img, err := local.NewImage(repoName, docker)
h.AssertNil(t, err)
h.AssertNil(t, img.Save())
})
it.After(func() {
h.DockerRmi(docker, repoName)
})
it("returns the local image", func() {
_, err := imageFetcher.Fetch(context.TODO(), repoName, image.FetchOptions{Daemon: true, PullPolicy: image.PullIfNotPresent})
h.AssertNil(t, err)
})
})
when("there is no local image", func() {
it("returns an error", func() {
_, err := imageFetcher.Fetch(context.TODO(), repoName, image.FetchOptions{Daemon: true, PullPolicy: image.PullIfNotPresent})
h.AssertError(t, err, fmt.Sprintf("image '%s' does not exist on the daemon", repoName))
})
})
})
when("image platform is specified", func() {
it("passes the platform argument to the daemon", func() {
_, err := imageFetcher.Fetch(context.TODO(), repoName, image.FetchOptions{Daemon: true, PullPolicy: image.PullIfNotPresent, Platform: "some-unsupported-platform"})
h.AssertError(t, err, "unknown operating system or architecture")
})
})
})
})
})
}