package manifestlist import ( "bytes" "encoding/json" "reflect" "testing" "github.com/docker/distribution" "github.com/opencontainers/image-spec/specs-go/v1" ) var expectedManifestListSerialization = []byte(`{ "schemaVersion": 2, "mediaType": "application/vnd.docker.distribution.manifest.list.v2+json", "manifests": [ { "mediaType": "application/vnd.docker.distribution.manifest.v2+json", "size": 985, "digest": "sha256:1a9ec845ee94c202b2d5da74a24f0ed2058318bfa9879fa541efaecba272e86b", "platform": { "architecture": "amd64", "os": "linux", "features": [ "sse4" ] } }, { "mediaType": "application/vnd.docker.distribution.manifest.v2+json", "size": 2392, "digest": "sha256:6346340964309634683409684360934680934608934608934608934068934608", "platform": { "architecture": "sun4m", "os": "sunos" } } ] }`) func makeTestManifestList(t *testing.T, mediaType string) ([]ManifestDescriptor, *DeserializedManifestList) { manifestDescriptors := []ManifestDescriptor{ { Descriptor: distribution.Descriptor{ Digest: "sha256:1a9ec845ee94c202b2d5da74a24f0ed2058318bfa9879fa541efaecba272e86b", Size: 985, MediaType: "application/vnd.docker.distribution.manifest.v2+json", }, Platform: PlatformSpec{ Architecture: "amd64", OS: "linux", Features: []string{"sse4"}, }, }, { Descriptor: distribution.Descriptor{ Digest: "sha256:6346340964309634683409684360934680934608934608934608934068934608", Size: 2392, MediaType: "application/vnd.docker.distribution.manifest.v2+json", }, Platform: PlatformSpec{ Architecture: "sun4m", OS: "sunos", }, }, } deserialized, err := FromDescriptorsWithMediaType(manifestDescriptors, mediaType) if err != nil { t.Fatalf("error creating DeserializedManifestList: %v", err) } return manifestDescriptors, deserialized } func TestManifestList(t *testing.T) { manifestDescriptors, deserialized := makeTestManifestList(t, MediaTypeManifestList) mediaType, canonical, _ := deserialized.Payload() if mediaType != MediaTypeManifestList { t.Fatalf("unexpected media type: %s", mediaType) } // Check that the canonical field is the same as json.MarshalIndent // with these parameters. p, err := json.MarshalIndent(&deserialized.ManifestList, "", " ") if err != nil { t.Fatalf("error marshaling manifest list: %v", err) } if !bytes.Equal(p, canonical) { t.Fatalf("manifest bytes not equal: %q != %q", string(canonical), string(p)) } // Check that the canonical field has the expected value. if !bytes.Equal(expectedManifestListSerialization, canonical) { t.Fatalf("manifest bytes not equal: %q != %q", string(canonical), string(expectedManifestListSerialization)) } var unmarshalled DeserializedManifestList if err := json.Unmarshal(deserialized.canonical, &unmarshalled); err != nil { t.Fatalf("error unmarshaling manifest: %v", err) } if !reflect.DeepEqual(&unmarshalled, deserialized) { t.Fatalf("manifests are different after unmarshaling: %v != %v", unmarshalled, *deserialized) } references := deserialized.References() if len(references) != 2 { t.Fatalf("unexpected number of references: %d", len(references)) } for i := range references { if !reflect.DeepEqual(references[i], manifestDescriptors[i].Descriptor) { t.Fatalf("unexpected value %d returned by References: %v", i, references[i]) } } } // TODO (mikebrow): add annotations on the manifest list (index) and support for // empty platform structs (move to Platform *Platform `json:"platform,omitempty"` // from current Platform PlatformSpec `json:"platform"`) in the manifest descriptor. // Requires changes to docker/distribution/manifest/manifestlist.ManifestList and .ManifestDescriptor // and associated serialization APIs in manifestlist.go. Or split the OCI index and // docker manifest list implementations, which would require a lot of refactoring. var expectedOCIImageIndexSerialization = []byte(`{ "schemaVersion": 2, "mediaType": "application/vnd.oci.image.index.v1+json", "manifests": [ { "mediaType": "application/vnd.oci.image.manifest.v1+json", "size": 985, "digest": "sha256:1a9ec845ee94c202b2d5da74a24f0ed2058318bfa9879fa541efaecba272e86b", "platform": { "architecture": "amd64", "os": "linux", "features": [ "sse4" ] } }, { "mediaType": "application/vnd.oci.image.manifest.v1+json", "size": 985, "digest": "sha256:1a9ec845ee94c202b2d5da74a24f0ed2058318bfa9879fa541efaecba272e86b", "annotations": { "platform": "none" }, "platform": { "architecture": "", "os": "" } }, { "mediaType": "application/vnd.oci.image.manifest.v1+json", "size": 2392, "digest": "sha256:6346340964309634683409684360934680934608934608934608934068934608", "annotations": { "what": "for" }, "platform": { "architecture": "sun4m", "os": "sunos" } } ] }`) func makeTestOCIImageIndex(t *testing.T, mediaType string) ([]ManifestDescriptor, *DeserializedManifestList) { manifestDescriptors := []ManifestDescriptor{ { Descriptor: distribution.Descriptor{ Digest: "sha256:1a9ec845ee94c202b2d5da74a24f0ed2058318bfa9879fa541efaecba272e86b", Size: 985, MediaType: "application/vnd.oci.image.manifest.v1+json", }, Platform: PlatformSpec{ Architecture: "amd64", OS: "linux", Features: []string{"sse4"}, }, }, { Descriptor: distribution.Descriptor{ Digest: "sha256:1a9ec845ee94c202b2d5da74a24f0ed2058318bfa9879fa541efaecba272e86b", Size: 985, MediaType: "application/vnd.oci.image.manifest.v1+json", Annotations: map[string]string{"platform": "none"}, }, }, { Descriptor: distribution.Descriptor{ Digest: "sha256:6346340964309634683409684360934680934608934608934608934068934608", Size: 2392, MediaType: "application/vnd.oci.image.manifest.v1+json", Annotations: map[string]string{"what": "for"}, }, Platform: PlatformSpec{ Architecture: "sun4m", OS: "sunos", }, }, } deserialized, err := FromDescriptorsWithMediaType(manifestDescriptors, mediaType) if err != nil { t.Fatalf("error creating DeserializedManifestList: %v", err) } return manifestDescriptors, deserialized } func TestOCIImageIndex(t *testing.T) { manifestDescriptors, deserialized := makeTestOCIImageIndex(t, v1.MediaTypeImageIndex) mediaType, canonical, _ := deserialized.Payload() if mediaType != v1.MediaTypeImageIndex { t.Fatalf("unexpected media type: %s", mediaType) } // Check that the canonical field is the same as json.MarshalIndent // with these parameters. p, err := json.MarshalIndent(&deserialized.ManifestList, "", " ") if err != nil { t.Fatalf("error marshaling manifest list: %v", err) } if !bytes.Equal(p, canonical) { t.Fatalf("manifest bytes not equal: %q != %q", string(canonical), string(p)) } // Check that the canonical field has the expected value. if !bytes.Equal(expectedOCIImageIndexSerialization, canonical) { t.Fatalf("manifest bytes not equal to expected: %q != %q", string(canonical), string(expectedOCIImageIndexSerialization)) } var unmarshalled DeserializedManifestList if err := json.Unmarshal(deserialized.canonical, &unmarshalled); err != nil { t.Fatalf("error unmarshaling manifest: %v", err) } if !reflect.DeepEqual(&unmarshalled, deserialized) { t.Fatalf("manifests are different after unmarshaling: %v != %v", unmarshalled, *deserialized) } references := deserialized.References() if len(references) != 3 { t.Fatalf("unexpected number of references: %d", len(references)) } for i := range references { if !reflect.DeepEqual(references[i], manifestDescriptors[i].Descriptor) { t.Fatalf("unexpected value %d returned by References: %v", i, references[i]) } } } func mediaTypeTest(t *testing.T, contentType string, mediaType string, shouldError bool) { var m *DeserializedManifestList if contentType == MediaTypeManifestList { _, m = makeTestManifestList(t, mediaType) } else { _, m = makeTestOCIImageIndex(t, mediaType) } _, canonical, err := m.Payload() if err != nil { t.Fatalf("error getting payload, %v", err) } unmarshalled, descriptor, err := distribution.UnmarshalManifest( contentType, canonical) if shouldError { if err == nil { t.Fatalf("bad content type should have produced error") } } else { if err != nil { t.Fatalf("error unmarshaling manifest, %v", err) } asManifest := unmarshalled.(*DeserializedManifestList) if asManifest.MediaType != mediaType { t.Fatalf("Bad media type '%v' as unmarshalled", asManifest.MediaType) } if descriptor.MediaType != contentType { t.Fatalf("Bad media type '%v' for descriptor", descriptor.MediaType) } unmarshalledMediaType, _, _ := unmarshalled.Payload() if unmarshalledMediaType != contentType { t.Fatalf("Bad media type '%v' for payload", unmarshalledMediaType) } } } func TestMediaTypes(t *testing.T) { mediaTypeTest(t, MediaTypeManifestList, "", true) mediaTypeTest(t, MediaTypeManifestList, MediaTypeManifestList, false) mediaTypeTest(t, MediaTypeManifestList, MediaTypeManifestList+"XXX", true) mediaTypeTest(t, v1.MediaTypeImageIndex, "", false) mediaTypeTest(t, v1.MediaTypeImageIndex, v1.MediaTypeImageIndex, false) mediaTypeTest(t, v1.MediaTypeImageIndex, v1.MediaTypeImageIndex+"XXX", true) }