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