| package metadata // import "github.com/docker/docker/distribution/metadata" |
| |
| import ( |
| "encoding/hex" |
| "io/ioutil" |
| "math/rand" |
| "os" |
| "reflect" |
| "testing" |
| |
| "github.com/docker/docker/layer" |
| "github.com/opencontainers/go-digest" |
| ) |
| |
| func TestV2MetadataService(t *testing.T) { |
| tmpDir, err := ioutil.TempDir("", "blobsum-storage-service-test") |
| if err != nil { |
| t.Fatalf("could not create temp dir: %v", err) |
| } |
| defer os.RemoveAll(tmpDir) |
| |
| metadataStore, err := NewFSMetadataStore(tmpDir) |
| if err != nil { |
| t.Fatalf("could not create metadata store: %v", err) |
| } |
| V2MetadataService := NewV2MetadataService(metadataStore) |
| |
| tooManyBlobSums := make([]V2Metadata, 100) |
| for i := range tooManyBlobSums { |
| randDigest := randomDigest() |
| tooManyBlobSums[i] = V2Metadata{Digest: randDigest} |
| } |
| |
| testVectors := []struct { |
| diffID layer.DiffID |
| metadata []V2Metadata |
| }{ |
| { |
| diffID: layer.DiffID("sha256:a3ed95caeb02ffe68cdd9fd84406680ae93d633cb16422d00e8a7c22955b46d4"), |
| metadata: []V2Metadata{ |
| {Digest: digest.Digest("sha256:f0cd5ca10b07f35512fc2f1cbf9a6cefbdb5cba70ac6b0c9e5988f4497f71937")}, |
| }, |
| }, |
| { |
| diffID: layer.DiffID("sha256:86e0e091d0da6bde2456dbb48306f3956bbeb2eae1b5b9a43045843f69fe4aaa"), |
| metadata: []V2Metadata{ |
| {Digest: digest.Digest("sha256:f0cd5ca10b07f35512fc2f1cbf9a6cefbdb5cba70ac6b0c9e5988f4497f71937")}, |
| {Digest: digest.Digest("sha256:9e3447ca24cb96d86ebd5960cb34d1299b07e0a0e03801d90b9969a2c187dd6e")}, |
| }, |
| }, |
| { |
| diffID: layer.DiffID("sha256:03f4658f8b782e12230c1783426bd3bacce651ce582a4ffb6fbbfa2079428ecb"), |
| metadata: tooManyBlobSums, |
| }, |
| } |
| |
| // Set some associations |
| for _, vec := range testVectors { |
| for _, blobsum := range vec.metadata { |
| err := V2MetadataService.Add(vec.diffID, blobsum) |
| if err != nil { |
| t.Fatalf("error calling Set: %v", err) |
| } |
| } |
| } |
| |
| // Check the correct values are read back |
| for _, vec := range testVectors { |
| metadata, err := V2MetadataService.GetMetadata(vec.diffID) |
| if err != nil { |
| t.Fatalf("error calling Get: %v", err) |
| } |
| expectedMetadataEntries := len(vec.metadata) |
| if expectedMetadataEntries > 50 { |
| expectedMetadataEntries = 50 |
| } |
| if !reflect.DeepEqual(metadata, vec.metadata[len(vec.metadata)-expectedMetadataEntries:len(vec.metadata)]) { |
| t.Fatal("Get returned incorrect layer ID") |
| } |
| } |
| |
| // Test GetMetadata on a nonexistent entry |
| _, err = V2MetadataService.GetMetadata(layer.DiffID("sha256:82379823067823853223359023576437723560923756b03560378f4497753917")) |
| if err == nil { |
| t.Fatal("expected error looking up nonexistent entry") |
| } |
| |
| // Test GetDiffID on a nonexistent entry |
| _, err = V2MetadataService.GetDiffID(digest.Digest("sha256:82379823067823853223359023576437723560923756b03560378f4497753917")) |
| if err == nil { |
| t.Fatal("expected error looking up nonexistent entry") |
| } |
| |
| // Overwrite one of the entries and read it back |
| err = V2MetadataService.Add(testVectors[1].diffID, testVectors[0].metadata[0]) |
| if err != nil { |
| t.Fatalf("error calling Add: %v", err) |
| } |
| diffID, err := V2MetadataService.GetDiffID(testVectors[0].metadata[0].Digest) |
| if err != nil { |
| t.Fatalf("error calling GetDiffID: %v", err) |
| } |
| if diffID != testVectors[1].diffID { |
| t.Fatal("GetDiffID returned incorrect diffID") |
| } |
| } |
| |
| func randomDigest() digest.Digest { |
| b := [32]byte{} |
| for i := 0; i < len(b); i++ { |
| b[i] = byte(rand.Intn(256)) |
| } |
| d := hex.EncodeToString(b[:]) |
| return digest.Digest("sha256:" + d) |
| } |