Function configForLayers

storage/storage_test.go:317–348

configForLayers returns a minimally-plausible config for layers

(t *testing.T, layers []testBlob)

// configForLayers returns a minimally-plausible config for layers
func configForLayers(t *testing.T, layers []testBlob) testBlob {
	rootFS := manifest.Schema2RootFS{
		Type:    "layers",
		DiffIDs: []digest.Digest{},
	}
	for _, l := range layers {
		rootFS.DiffIDs = append(rootFS.DiffIDs, l.uncompressedDigest)
	}
	// Add a unique label so that different calls to configForLayers don’t try to use the same image ID.
	randomBytes := make([]byte, digest.Canonical.Size())
	_, err := rand.Read(randomBytes)
	require.NoError(t, err)
	config := manifest.Schema2Image{
		Schema2V1Image: manifest.Schema2V1Image{
			Config: &manifest.Schema2Config{
				Labels: map[string]string{"unique": fmt.Sprintf("%x", randomBytes)},
			},
			Created: time.Now(),
		},
		RootFS: &rootFS,
	}
	configBytes, err := json.Marshal(config)
	require.NoError(t, err)
	configDigest := digest.Canonical.FromBytes(configBytes)
	return testBlob{
		uncompressedDigest: configDigest,
		compressedDigest:   configDigest,
		uncompressedSize:   int64(len(configBytes)),
		compressedSize:     int64(len(configBytes)),
		data:               configBytes,
	}
}

func createUncommittedImageDest(t *testing.T, ref types.ImageReference, cache types.BlobInfoCache,
	layers []testBlob, config *testBlob) (types.ImageDestination, types.UnparsedImage) {