package storage import ( "io" "path" "testing" "github.com/distribution/distribution/v3" "github.com/distribution/distribution/v3/internal/dcontext" "github.com/distribution/distribution/v3/manifest/ocischema" "github.com/distribution/distribution/v3/registry/storage/driver" "github.com/distribution/distribution/v3/registry/storage/driver/inmemory" "github.com/distribution/distribution/v3/testutil" "github.com/distribution/reference" "github.com/opencontainers/go-digest" ) type image struct { manifest distribution.Manifest manifestDigest digest.Digest layers map[digest.Digest]io.ReadSeeker } func createRegistry(t *testing.T, driver driver.StorageDriver, options ...RegistryOption) distribution.Namespace { ctx := dcontext.Background() options = append(options, EnableDelete) registry, err := NewRegistry(ctx, driver, options...) if err != nil { t.Fatalf("Failed to construct namespace") } return registry } func makeRepository(t *testing.T, registry distribution.Namespace, name string) distribution.Repository { ctx := dcontext.Background() // Initialize a dummy repository named, err := reference.WithName(name) if err != nil { t.Fatalf("Failed to parse name %s: %v", name, err) } repo, err := registry.Repository(ctx, named) if err != nil { t.Fatalf("Failed to construct repository: %v", err) } return repo } func makeManifestService(t *testing.T, repository distribution.Repository) distribution.ManifestService { ctx := dcontext.Background() manifestService, err := repository.Manifests(ctx) if err != nil { t.Fatalf("Failed to construct manifest store: %v", err) } return manifestService } func allManifests(t *testing.T, manifestService distribution.ManifestService) map[digest.Digest]struct{} { ctx := dcontext.Background() allManMap := make(map[digest.Digest]struct{}) manifestEnumerator, ok := manifestService.(distribution.ManifestEnumerator) if !ok { t.Fatalf("unable to convert ManifestService into ManifestEnumerator") } err := manifestEnumerator.Enumerate(ctx, func(dgst digest.Digest) error { allManMap[dgst] = struct{}{} return nil }) if err != nil { t.Fatalf("Error getting all manifests: %v", err) } return allManMap } func allBlobs(t *testing.T, registry distribution.Namespace) map[digest.Digest]struct{} { ctx := dcontext.Background() blobService := registry.Blobs() allBlobsMap := make(map[digest.Digest]struct{}) err := blobService.Enumerate(ctx, func(dgst digest.Digest) error { allBlobsMap[dgst] = struct{}{} return nil }) if err != nil { t.Fatalf("Error getting all blobs: %v", err) } return allBlobsMap } func uploadImage(t *testing.T, repository distribution.Repository, im image) digest.Digest { // upload layers err := testutil.UploadBlobs(repository, im.layers) if err != nil { t.Fatalf("layer upload failed: %v", err) } // upload manifest ctx := dcontext.Background() manifestService := makeManifestService(t, repository) manifestDigest, err := manifestService.Put(ctx, im.manifest) if err != nil { t.Fatalf("manifest upload failed: %v", err) } return manifestDigest } func uploadRandomSchema2Image(t *testing.T, repository distribution.Repository) image { randomLayers, err := testutil.CreateRandomLayers(2) if err != nil { t.Fatalf("%v", err) } digests := []digest.Digest{} for digest := range randomLayers { digests = append(digests, digest) } manifest, err := testutil.MakeSchema2Manifest(repository, digests) if err != nil { t.Fatalf("%v", err) } manifestDigest := uploadImage(t, repository, image{manifest: manifest, layers: randomLayers}) return image{ manifest: manifest, manifestDigest: manifestDigest, layers: randomLayers, } } func uploadRandomOCIImage(t *testing.T, repository distribution.Repository) image { randomLayers, err := testutil.CreateRandomLayers(2) if err != nil { t.Fatalf("%v", err) } digests := []digest.Digest{} for digest := range randomLayers { digests = append(digests, digest) } manifest, err := testutil.MakeOCIManifest(repository, digests) if err != nil { t.Fatalf("%v", err) } manifestDigest := uploadImage(t, repository, image{manifest: manifest, layers: randomLayers}) return image{ manifest: manifest, manifestDigest: manifestDigest, layers: randomLayers, } } func TestNoDeletionNoEffect(t *testing.T) { ctx := dcontext.Background() inmemoryDriver := inmemory.New() registry := createRegistry(t, inmemoryDriver) repo := makeRepository(t, registry, "palailogos") manifestService, _ := repo.Manifests(ctx) image1 := uploadRandomSchema2Image(t, repo) image2 := uploadRandomSchema2Image(t, repo) uploadRandomSchema2Image(t, repo) // construct manifestlist for fun. blobstatter := registry.BlobStatter() manifestList, err := testutil.MakeManifestList(blobstatter, []digest.Digest{ image1.manifestDigest, image2.manifestDigest, }) if err != nil { t.Fatalf("Failed to make manifest list: %v", err) } _, err = manifestService.Put(ctx, manifestList) if err != nil { t.Fatalf("Failed to add manifest list: %v", err) } before := allBlobs(t, registry) // Run GC err = MarkAndSweep(dcontext.Background(), inmemoryDriver, registry, GCOpts{ DryRun: false, RemoveUntagged: false, }) if err != nil { t.Fatalf("Failed mark and sweep: %v", err) } after := allBlobs(t, registry) if len(before) != len(after) { t.Fatalf("Garbage collection affected storage: %d != %d", len(before), len(after)) } } func TestDeleteManifestIfTagNotFound(t *testing.T) { ctx := dcontext.Background() inmemoryDriver := inmemory.New() registry := createRegistry(t, inmemoryDriver) repo := makeRepository(t, registry, "deletemanifests") manifestService, _ := repo.Manifests(ctx) // Create random layers randomLayers1, err := testutil.CreateRandomLayers(3) if err != nil { t.Fatalf("failed to make layers: %v", err) } randomLayers2, err := testutil.CreateRandomLayers(3) if err != nil { t.Fatalf("failed to make layers: %v", err) } // Upload all layers err = testutil.UploadBlobs(repo, randomLayers1) if err != nil { t.Fatalf("failed to upload layers: %v", err) } err = testutil.UploadBlobs(repo, randomLayers2) if err != nil { t.Fatalf("failed to upload layers: %v", err) } // Construct manifests manifest1, err := testutil.MakeSchema2Manifest(repo, getKeys(randomLayers1)) if err != nil { t.Fatalf("failed to make manifest: %v", err) } manifest2, err := testutil.MakeSchema2Manifest(repo, getKeys(randomLayers2)) if err != nil { t.Fatalf("failed to make manifest: %v", err) } _, err = manifestService.Put(ctx, manifest1) if err != nil { t.Fatalf("manifest upload failed: %v", err) } _, err = manifestService.Put(ctx, manifest2) if err != nil { t.Fatalf("manifest upload failed: %v", err) } manifestEnumerator, _ := manifestService.(distribution.ManifestEnumerator) err = manifestEnumerator.Enumerate(ctx, func(dgst digest.Digest) error { return repo.Tags(ctx).Tag(ctx, "test", distribution.Descriptor{Digest: dgst}) }) if err != nil { t.Fatalf("manifest enumeration failed: %v", err) } before1 := allBlobs(t, registry) before2 := allManifests(t, manifestService) // run GC with dry-run (should not remove anything) err = MarkAndSweep(dcontext.Background(), inmemoryDriver, registry, GCOpts{ DryRun: true, RemoveUntagged: true, }) if err != nil { t.Fatalf("Failed mark and sweep: %v", err) } afterDry1 := allBlobs(t, registry) afterDry2 := allManifests(t, manifestService) if len(before1) != len(afterDry1) { t.Fatalf("Garbage collection affected blobs storage: %d != %d", len(before1), len(afterDry1)) } if len(before2) != len(afterDry2) { t.Fatalf("Garbage collection affected manifest storage: %d != %d", len(before2), len(afterDry2)) } // Run GC (removes everything because no manifests with tags exist) err = MarkAndSweep(dcontext.Background(), inmemoryDriver, registry, GCOpts{ DryRun: false, RemoveUntagged: true, }) if err != nil { t.Fatalf("Failed mark and sweep: %v", err) } after1 := allBlobs(t, registry) after2 := allManifests(t, manifestService) if len(before1) == len(after1) { t.Fatalf("Garbage collection affected blobs storage: %d == %d", len(before1), len(after1)) } if len(before2) == len(after2) { t.Fatalf("Garbage collection affected manifest storage: %d == %d", len(before2), len(after2)) } } func TestDeleteManifestIndexWithDanglingReferences(t *testing.T) { ctx := dcontext.Background() inmemoryDriver := inmemory.New() registry := createRegistry(t, inmemoryDriver) repo := makeRepository(t, registry, "deletemanifests") manifestService, _ := repo.Manifests(ctx) image1 := uploadRandomOCIImage(t, repo) image2 := uploadRandomOCIImage(t, repo) ii, _ := ocischema.FromDescriptors([]distribution.Descriptor{ {Digest: image1.manifestDigest}, {Digest: image2.manifestDigest}, }, map[string]string{}) id, err := manifestService.Put(ctx, ii) if err != nil { t.Fatalf("manifest upload failed: %v", err) } err = repo.Tags(ctx).Tag(ctx, "test", distribution.Descriptor{Digest: id}) if err != nil { t.Fatalf("Failed to delete tag: %v", err) } // delete image2 => ii has a dangling reference err = manifestService.Delete(ctx, image2.manifestDigest) if err != nil { t.Fatalf("Failed to delete image: %v", err) } before1 := allBlobs(t, registry) before2 := allManifests(t, manifestService) // run GC (should not remove anything because of tag) err = MarkAndSweep(dcontext.Background(), inmemoryDriver, registry, GCOpts{ DryRun: false, RemoveUntagged: true, }) if err != nil { t.Fatalf("Failed mark and sweep: %v", err) } after1 := allBlobs(t, registry) after2 := allManifests(t, manifestService) if len(before1) == len(after1) { t.Fatalf("Garbage collection did not affect blobs storage: %d == %d", len(before1), len(after1)) } if len(before2) != len(after2) { t.Fatalf("Garbage collection affected manifest storage: %d != %d", len(before2), len(after2)) } } func TestDeleteManifestIndexIfTagNotFound(t *testing.T) { ctx := dcontext.Background() inmemoryDriver := inmemory.New() registry := createRegistry(t, inmemoryDriver) repo := makeRepository(t, registry, "deletemanifests") manifestService, _ := repo.Manifests(ctx) image1 := uploadRandomOCIImage(t, repo) image2 := uploadRandomOCIImage(t, repo) ii, _ := ocischema.FromDescriptors([]distribution.Descriptor{ {Digest: image1.manifestDigest}, {Digest: image2.manifestDigest}, }, map[string]string{}) d4, err := manifestService.Put(ctx, ii) if err != nil { t.Fatalf("manifest upload failed: %v", err) } err = repo.Tags(ctx).Tag(ctx, "test", distribution.Descriptor{Digest: d4}) if err != nil { t.Fatalf("Failed to delete tag: %v", err) } before1 := allBlobs(t, registry) before2 := allManifests(t, manifestService) // run GC (should not remove anything because of tag) err = MarkAndSweep(dcontext.Background(), inmemoryDriver, registry, GCOpts{ DryRun: false, RemoveUntagged: true, }) if err != nil { t.Fatalf("Failed mark and sweep: %v", err) } beforeUntag1 := allBlobs(t, registry) beforeUntag2 := allManifests(t, manifestService) if len(before1) != len(beforeUntag1) { t.Fatalf("Garbage collection affected blobs storage: %d != %d", len(before1), len(beforeUntag1)) } if len(before2) != len(beforeUntag2) { t.Fatalf("Garbage collection affected manifest storage: %d != %d", len(before2), len(beforeUntag2)) } err = repo.Tags(ctx).Untag(ctx, "test") if err != nil { t.Fatalf("Failed to delete tag: %v", err) } // Run GC (removes everything because no manifests with tags exist) err = MarkAndSweep(dcontext.Background(), inmemoryDriver, registry, GCOpts{ DryRun: false, RemoveUntagged: true, }) if err != nil { t.Fatalf("Failed mark and sweep: %v", err) } after1 := allBlobs(t, registry) after2 := allManifests(t, manifestService) if len(beforeUntag1) == len(after1) { t.Fatalf("Garbage collection did not affect blobs storage: %d == %d", len(beforeUntag1), len(after1)) } if len(beforeUntag2) == len(after2) { t.Fatalf("Garbage collection did not affect manifest storage: %d == %d", len(beforeUntag2), len(after2)) } } func TestGCWithUnknownRepository(t *testing.T) { ctx := dcontext.Background() d := inmemory.New() registry := createRegistry(t, d) repo := makeRepository(t, registry, "nonexistentrepo") image := uploadRandomSchema2Image(t, repo) err := repo.Tags(ctx).Tag(ctx, "image", distribution.Descriptor{Digest: image.manifestDigest}) if err != nil { t.Fatalf("Failed to tag descriptor: %v", err) } // Simulate a missing _manifests/tags directory manifestTagsPath, err := pathFor(manifestTagsPathSpec{"nonexistentrepo"}) if err != nil { t.Fatal(err) } err = d.Delete(ctx, manifestTagsPath) if err != nil { t.Fatal(err) } err = MarkAndSweep(dcontext.Background(), d, registry, GCOpts{ DryRun: false, RemoveUntagged: true, }) if err != nil { t.Fatalf("got error: %v, expected nil", err) } } func TestGCWithMissingManifests(t *testing.T) { ctx := dcontext.Background() d := inmemory.New() registry := createRegistry(t, d) repo := makeRepository(t, registry, "testrepo") uploadRandomSchema2Image(t, repo) // Simulate a missing _manifests directory revPath, err := pathFor(manifestRevisionsPathSpec{"testrepo"}) if err != nil { t.Fatal(err) } _manifestsPath := path.Dir(revPath) err = d.Delete(ctx, _manifestsPath) if err != nil { t.Fatal(err) } err = MarkAndSweep(dcontext.Background(), d, registry, GCOpts{ DryRun: false, RemoveUntagged: false, }) if err != nil { t.Fatalf("Failed mark and sweep: %v", err) } blobs := allBlobs(t, registry) if len(blobs) > 0 { t.Errorf("unexpected blobs after gc") } } func TestDeletionHasEffect(t *testing.T) { ctx := dcontext.Background() inmemoryDriver := inmemory.New() registry := createRegistry(t, inmemoryDriver) repo := makeRepository(t, registry, "komnenos") manifests, _ := repo.Manifests(ctx) image1 := uploadRandomSchema2Image(t, repo) image2 := uploadRandomSchema2Image(t, repo) image3 := uploadRandomSchema2Image(t, repo) if err := manifests.Delete(ctx, image2.manifestDigest); err != nil { t.Fatalf("failed deleting manifest digest: %v", err) } if err := manifests.Delete(ctx, image3.manifestDigest); err != nil { t.Fatalf("failed deleting manifest digest: %v", err) } // Run GC err := MarkAndSweep(dcontext.Background(), inmemoryDriver, registry, GCOpts{ DryRun: false, RemoveUntagged: false, }) if err != nil { t.Fatalf("Failed mark and sweep: %v", err) } blobs := allBlobs(t, registry) // check that the image1 manifest and all the layers are still in blobs if _, ok := blobs[image1.manifestDigest]; !ok { t.Fatalf("First manifest is missing") } for layer := range image1.layers { if _, ok := blobs[layer]; !ok { t.Fatalf("manifest 1 layer is missing: %v", layer) } } // check that image2 and image3 layers are not still around for layer := range image2.layers { if _, ok := blobs[layer]; ok { t.Fatalf("manifest 2 layer is present: %v", layer) } } for layer := range image3.layers { if _, ok := blobs[layer]; ok { t.Fatalf("manifest 3 layer is present: %v", layer) } } } func getAnyKey(digests map[digest.Digest]io.ReadSeeker) (d digest.Digest) { for d = range digests { break } return } func getKeys(digests map[digest.Digest]io.ReadSeeker) (ds []digest.Digest) { for d := range digests { ds = append(ds, d) } return } func TestDeletionWithSharedLayer(t *testing.T) { ctx := dcontext.Background() inmemoryDriver := inmemory.New() registry := createRegistry(t, inmemoryDriver) repo := makeRepository(t, registry, "tzimiskes") // Create random layers randomLayers1, err := testutil.CreateRandomLayers(3) if err != nil { t.Fatalf("failed to make layers: %v", err) } randomLayers2, err := testutil.CreateRandomLayers(3) if err != nil { t.Fatalf("failed to make layers: %v", err) } // Upload all layers err = testutil.UploadBlobs(repo, randomLayers1) if err != nil { t.Fatalf("failed to upload layers: %v", err) } err = testutil.UploadBlobs(repo, randomLayers2) if err != nil { t.Fatalf("failed to upload layers: %v", err) } // Construct manifests manifest1, err := testutil.MakeSchema2Manifest(repo, getKeys(randomLayers1)) if err != nil { t.Fatalf("failed to make manifest: %v", err) } sharedKey := getAnyKey(randomLayers1) manifest2, err := testutil.MakeSchema2Manifest(repo, append(getKeys(randomLayers2), sharedKey)) if err != nil { t.Fatalf("failed to make manifest: %v", err) } manifestService := makeManifestService(t, repo) // Upload manifests _, err = manifestService.Put(ctx, manifest1) if err != nil { t.Fatalf("manifest upload failed: %v", err) } manifestDigest2, err := manifestService.Put(ctx, manifest2) if err != nil { t.Fatalf("manifest upload failed: %v", err) } // delete err = manifestService.Delete(ctx, manifestDigest2) if err != nil { t.Fatalf("manifest deletion failed: %v", err) } // check that all of the layers in layer 1 are still there blobs := allBlobs(t, registry) for dgst := range randomLayers1 { if _, ok := blobs[dgst]; !ok { t.Fatalf("random layer 1 blob missing: %v", dgst) } } } func TestOrphanBlobDeleted(t *testing.T) { inmemoryDriver := inmemory.New() registry := createRegistry(t, inmemoryDriver) repo := makeRepository(t, registry, "michael_z_doukas") digests, err := testutil.CreateRandomLayers(1) if err != nil { t.Fatalf("Failed to create random digest: %v", err) } if err = testutil.UploadBlobs(repo, digests); err != nil { t.Fatalf("Failed to upload blob: %v", err) } // formality to create the necessary directories uploadRandomSchema2Image(t, repo) // Run GC err = MarkAndSweep(dcontext.Background(), inmemoryDriver, registry, GCOpts{ DryRun: false, RemoveUntagged: false, }) if err != nil { t.Fatalf("Failed mark and sweep: %v", err) } blobs := allBlobs(t, registry) // check that orphan blob layers are not still around for dgst := range digests { if _, ok := blobs[dgst]; ok { t.Fatalf("Orphan layer is present: %v", dgst) } } } func TestTaggedManifestlistWithUntaggedManifest(t *testing.T) { ctx := dcontext.Background() inmemoryDriver := inmemory.New() registry := createRegistry(t, inmemoryDriver) repo := makeRepository(t, registry, "foo/taggedlist/untaggedmanifest") manifestService, err := repo.Manifests(ctx) if err != nil { t.Fatalf("%v", err) } image1 := uploadRandomSchema2Image(t, repo) image2 := uploadRandomSchema2Image(t, repo) // construct a manifestlist to reference manifests that is not tagged. blobstatter := registry.BlobStatter() manifestList, err := testutil.MakeManifestList(blobstatter, []digest.Digest{ image1.manifestDigest, image2.manifestDigest, }) if err != nil { t.Fatalf("Failed to make manifest list: %v", err) } dgst, err := manifestService.Put(ctx, manifestList) if err != nil { t.Fatalf("Failed to add manifest list: %v", err) } err = repo.Tags(ctx).Tag(ctx, "test", distribution.Descriptor{Digest: dgst}) if err != nil { t.Fatalf("Failed to delete tag: %v", err) } before := allBlobs(t, registry) // Run GC err = MarkAndSweep(dcontext.Background(), inmemoryDriver, registry, GCOpts{ DryRun: false, RemoveUntagged: true, }) if err != nil { t.Fatalf("Failed mark and sweep: %v", err) } after := allBlobs(t, registry) if len(before) != len(after) { t.Fatalf("Garbage collection affected storage: %d != %d", len(before), len(after)) } if _, ok := after[image1.manifestDigest]; !ok { t.Fatalf("First manifest is missing") } if _, ok := after[image2.manifestDigest]; !ok { t.Fatalf("Second manifest is missing") } if _, ok := after[dgst]; !ok { t.Fatalf("Manifest list is missing") } } func TestUnTaggedManifestlistWithUntaggedManifest(t *testing.T) { ctx := dcontext.Background() inmemoryDriver := inmemory.New() registry := createRegistry(t, inmemoryDriver) repo := makeRepository(t, registry, "foo/untaggedlist/untaggedmanifest") manifestService, err := repo.Manifests(ctx) if err != nil { t.Fatalf("%v", err) } image1 := uploadRandomSchema2Image(t, repo) image2 := uploadRandomSchema2Image(t, repo) // construct a manifestlist to reference manifests that is not tagged. blobstatter := registry.BlobStatter() manifestList, err := testutil.MakeManifestList(blobstatter, []digest.Digest{ image1.manifestDigest, image2.manifestDigest, }) if err != nil { t.Fatalf("Failed to make manifest list: %v", err) } _, err = manifestService.Put(ctx, manifestList) if err != nil { t.Fatalf("Failed to add manifest list: %v", err) } // Run GC err = MarkAndSweep(dcontext.Background(), inmemoryDriver, registry, GCOpts{ DryRun: false, RemoveUntagged: true, }) if err != nil { t.Fatalf("Failed mark and sweep: %v", err) } after := allBlobs(t, registry) if len(after) != 0 { t.Fatalf("Garbage collection affected storage: %d != %d", len(after), 0) } } func TestUnTaggedManifestlistWithTaggedManifest(t *testing.T) { ctx := dcontext.Background() inmemoryDriver := inmemory.New() registry := createRegistry(t, inmemoryDriver) repo := makeRepository(t, registry, "foo/untaggedlist/taggedmanifest") manifestService, err := repo.Manifests(ctx) if err != nil { t.Fatalf("%v", err) } image1 := uploadRandomSchema2Image(t, repo) image2 := uploadRandomSchema2Image(t, repo) err = repo.Tags(ctx).Tag(ctx, "image1", distribution.Descriptor{Digest: image1.manifestDigest}) if err != nil { t.Fatalf("Failed to delete tag: %v", err) } err = repo.Tags(ctx).Tag(ctx, "image2", distribution.Descriptor{Digest: image2.manifestDigest}) if err != nil { t.Fatalf("Failed to delete tag: %v", err) } // construct a manifestlist to reference manifests that is tagged. blobstatter := registry.BlobStatter() manifestList, err := testutil.MakeManifestList(blobstatter, []digest.Digest{ image1.manifestDigest, image2.manifestDigest, }) if err != nil { t.Fatalf("Failed to make manifest list: %v", err) } dgst, err := manifestService.Put(ctx, manifestList) if err != nil { t.Fatalf("Failed to add manifest list: %v", err) } // Run GC err = MarkAndSweep(dcontext.Background(), inmemoryDriver, registry, GCOpts{ DryRun: false, RemoveUntagged: true, }) if err != nil { t.Fatalf("Failed mark and sweep: %v", err) } after := allBlobs(t, registry) afterManifests := allManifests(t, manifestService) if _, ok := after[dgst]; ok { t.Fatalf("Untagged manifestlist still exists") } if _, ok := afterManifests[image1.manifestDigest]; !ok { t.Fatalf("First manifest is missing") } if _, ok := afterManifests[image2.manifestDigest]; !ok { t.Fatalf("Second manifest is missing") } } func TestTaggedManifestlistWithDeletedReference(t *testing.T) { ctx := dcontext.Background() inmemoryDriver := inmemory.New() registry := createRegistry(t, inmemoryDriver) repo := makeRepository(t, registry, "foo/untaggedlist/deleteref") manifestService, err := repo.Manifests(ctx) if err != nil { t.Fatalf("%v", err) } image1 := uploadRandomSchema2Image(t, repo) image2 := uploadRandomSchema2Image(t, repo) // construct a manifestlist to reference manifests that is deleted. blobstatter := registry.BlobStatter() manifestList, err := testutil.MakeManifestList(blobstatter, []digest.Digest{ image1.manifestDigest, image2.manifestDigest, }) if err != nil { t.Fatalf("Failed to make manifest list: %v", err) } _, err = manifestService.Put(ctx, manifestList) if err != nil { t.Fatalf("Failed to add manifest list: %v", err) } err = manifestService.Delete(ctx, image1.manifestDigest) if err != nil { t.Fatalf("Failed to delete image: %v", err) } err = manifestService.Delete(ctx, image2.manifestDigest) if err != nil { t.Fatalf("Failed to delete image: %v", err) } // Run GC err = MarkAndSweep(dcontext.Background(), inmemoryDriver, registry, GCOpts{ DryRun: false, RemoveUntagged: true, }) if err != nil { t.Fatalf("Failed mark and sweep: %v", err) } after := allBlobs(t, registry) if len(after) != 0 { t.Fatalf("Garbage collection affected storage: %d != %d", len(after), 0) } }