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|
package schema2
import (
"bytes"
"encoding/json"
"reflect"
"testing"
"github.com/docker/distribution"
"github.com/docker/distribution/manifest"
)
var expectedManifestSerialization = []byte(`{
"schemaVersion": 2,
"mediaType": "application/vnd.docker.distribution.manifest.v2+json",
"config": {
"mediaType": "application/vnd.docker.container.image.v1+json",
"size": 985,
"digest": "sha256:1a9ec845ee94c202b2d5da74a24f0ed2058318bfa9879fa541efaecba272e86b"
},
"layers": [
{
"mediaType": "application/vnd.docker.image.rootfs.diff.tar.gzip",
"size": 153263,
"digest": "sha256:62d8908bee94c202b2d35224a221aaa2058318bfa9879fa541efaecba272331b"
}
]
}`)
func makeTestManifest(mediaType string) Manifest {
return Manifest{
Versioned: manifest.Versioned{
SchemaVersion: 2,
MediaType: mediaType,
},
Config: distribution.Descriptor{
Digest: "sha256:1a9ec845ee94c202b2d5da74a24f0ed2058318bfa9879fa541efaecba272e86b",
Size: 985,
MediaType: MediaTypeImageConfig,
},
Layers: []distribution.Descriptor{
{
Digest: "sha256:62d8908bee94c202b2d35224a221aaa2058318bfa9879fa541efaecba272331b",
Size: 153263,
MediaType: MediaTypeLayer,
},
},
}
}
func TestManifest(t *testing.T) {
manifest := makeTestManifest(MediaTypeManifest)
deserialized, err := FromStruct(manifest)
if err != nil {
t.Fatalf("error creating DeserializedManifest: %v", err)
}
mediaType, canonical, _ := deserialized.Payload()
if mediaType != MediaTypeManifest {
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(&manifest, "", " ")
if err != nil {
t.Fatalf("error marshaling manifest: %v", err)
}
if !bytes.Equal(p, canonical) {
t.Fatalf("manifest bytes not equal: %q != %q", string(canonical), string(p))
}
// Check that canonical field matches expected value.
if !bytes.Equal(expectedManifestSerialization, canonical) {
t.Fatalf("manifest bytes not equal: %q != %q", string(canonical), string(expectedManifestSerialization))
}
var unmarshalled DeserializedManifest
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)
}
target := deserialized.Target()
if target.Digest != "sha256:1a9ec845ee94c202b2d5da74a24f0ed2058318bfa9879fa541efaecba272e86b" {
t.Fatalf("unexpected digest in target: %s", target.Digest.String())
}
if target.MediaType != MediaTypeImageConfig {
t.Fatalf("unexpected media type in target: %s", target.MediaType)
}
if target.Size != 985 {
t.Fatalf("unexpected size in target: %d", target.Size)
}
references := deserialized.References()
if len(references) != 2 {
t.Fatalf("unexpected number of references: %d", len(references))
}
if !reflect.DeepEqual(references[0], target) {
t.Fatalf("first reference should be target: %v != %v", references[0], target)
}
// Test the second reference
if references[1].Digest != "sha256:62d8908bee94c202b2d35224a221aaa2058318bfa9879fa541efaecba272331b" {
t.Fatalf("unexpected digest in reference: %s", references[0].Digest.String())
}
if references[1].MediaType != MediaTypeLayer {
t.Fatalf("unexpected media type in reference: %s", references[0].MediaType)
}
if references[1].Size != 153263 {
t.Fatalf("unexpected size in reference: %d", references[0].Size)
}
}
func mediaTypeTest(t *testing.T, mediaType string, shouldError bool) {
manifest := makeTestManifest(mediaType)
deserialized, err := FromStruct(manifest)
if err != nil {
t.Fatalf("error creating DeserializedManifest: %v", err)
}
unmarshalled, descriptor, err := distribution.UnmarshalManifest(
MediaTypeManifest,
deserialized.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.(*DeserializedManifest)
if asManifest.MediaType != mediaType {
t.Fatalf("Bad media type '%v' as unmarshalled", asManifest.MediaType)
}
if descriptor.MediaType != MediaTypeManifest {
t.Fatalf("Bad media type '%v' for descriptor", descriptor.MediaType)
}
unmarshalledMediaType, _, _ := unmarshalled.Payload()
if unmarshalledMediaType != MediaTypeManifest {
t.Fatalf("Bad media type '%v' for payload", unmarshalledMediaType)
}
}
}
func TestMediaTypes(t *testing.T) {
mediaTypeTest(t, "", true)
mediaTypeTest(t, MediaTypeManifest, false)
mediaTypeTest(t, MediaTypeManifest+"XXX", true)
}
|
