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 TestManifestList(t *testing.T) { 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 := FromDescriptors(manifestDescriptors) if err != nil { t.Fatalf("error creating DeserializedManifestList: %v", err) } 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]) } } } 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": 2392, "digest": "sha256:6346340964309634683409684360934680934608934608934608934068934608", "platform": { "architecture": "sun4m", "os": "sunos" } } ] }`) func TestOCIImageIndex(t *testing.T) { 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: "sha256:6346340964309634683409684360934680934608934608934608934068934608", Size: 2392, MediaType: "application/vnd.oci.image.manifest.v1+json", }, Platform: PlatformSpec{ Architecture: "sun4m", OS: "sunos", }, }, } deserialized, err := FromDescriptors(manifestDescriptors) if err != nil { t.Fatalf("error creating DeserializedManifestList: %v", err) } 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: %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) != 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]) } } }