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oci_test.go
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oci_test.go
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package oci
import (
"encoding/json"
"io/ioutil"
"os"
"path/filepath"
"testing"
"github.com/containerd/containerd/fs/fstest"
"github.com/opencontainers/go-digest"
"github.com/opencontainers/image-spec/specs-go"
spec "github.com/opencontainers/image-spec/specs-go/v1"
"github.com/stretchr/testify/assert"
)
func TestInitError(t *testing.T) {
tmp, err := ioutil.TempDir("", "oci")
assert.Nil(t, err)
defer os.RemoveAll(tmp)
err = Init(tmp, "")
assert.Error(t, err, "file exists")
}
func TestInit(t *testing.T) {
tmp, err := ioutil.TempDir("", "oci")
assert.Nil(t, err)
defer os.RemoveAll(tmp)
img := filepath.Join(tmp, "foo")
err = Init(img, "")
assert.Nil(t, err)
ociLayout, err := json.Marshal(spec.ImageLayout{Version: spec.ImageLayoutVersion})
assert.Nil(t, err)
indexJSON, err := json.Marshal(spec.Index{Versioned: specs.Versioned{SchemaVersion: 2}})
applier := fstest.Apply(
fstest.CreateDir("/foo", 0755),
fstest.CreateDir("/foo/blobs", 0755),
fstest.CreateDir("/foo/blobs/"+string(digest.Canonical), 0755),
fstest.CreateFile("/foo/oci-layout", ociLayout, 0644),
fstest.CreateFile("/foo/index.json", indexJSON, 0644),
)
err = fstest.CheckDirectoryEqualWithApplier(tmp, applier)
assert.Nil(t, err)
}
func TestWriteReadDeleteBlob(t *testing.T) {
tmp, err := ioutil.TempDir("", "oci")
assert.Nil(t, err)
defer os.RemoveAll(tmp)
img := filepath.Join(tmp, "foo")
err = Init(img, "")
assert.Nil(t, err)
testBlob := []byte("test")
// Write
d, err := WriteBlob(img, testBlob)
applier := fstest.Apply(
fstest.CreateFile("/"+d.Hex(), testBlob, 0444),
)
err = fstest.CheckDirectoryEqualWithApplier(filepath.Join(img, "blobs", string(digest.Canonical)), applier)
assert.Nil(t, err)
// Read
b, err := ReadBlob(img, d)
assert.Nil(t, err)
assert.Equal(t, testBlob, b)
// Delete
err = DeleteBlob(img, d)
assert.Nil(t, err)
applier = fstest.Apply()
err = fstest.CheckDirectoryEqualWithApplier(filepath.Join(img, "blobs", string(digest.Canonical)), applier)
assert.Nil(t, err)
}
func TestBlobWriter(t *testing.T) {
tmp, err := ioutil.TempDir("", "oci")
assert.Nil(t, err)
defer os.RemoveAll(tmp)
img := filepath.Join(tmp, "foo")
err = Init(img, "")
assert.Nil(t, err)
testBlob := []byte("test")
w, err := NewBlobWriter(img, digest.Canonical)
_, err = w.Write(testBlob)
assert.Nil(t, err)
// blob is not written until closing
applier := fstest.Apply()
err = fstest.CheckDirectoryEqualWithApplier(filepath.Join(img, "blobs", string(digest.Canonical)), applier)
// digest is unavailable until closing
assert.Panics(t, func() { w.Digest() })
// close and calculate the digest
err = w.Close()
assert.Nil(t, err)
d := w.Digest()
applier = fstest.Apply(
fstest.CreateFile("/"+d.Hex(), testBlob, 0444),
)
err = fstest.CheckDirectoryEqualWithApplier(filepath.Join(img, "blobs", string(digest.Canonical)), applier)
assert.Nil(t, err)
}
func TestIndex(t *testing.T) {
tmp, err := ioutil.TempDir("", "oci")
assert.Nil(t, err)
defer os.RemoveAll(tmp)
img := filepath.Join(tmp, "foo")
err = Init(img, "")
assert.Nil(t, err)
descs := []spec.Descriptor{
{
MediaType: spec.MediaTypeImageManifest,
Annotations: map[string]string{
spec.AnnotationRefName: "foo",
"dummy": "desc0",
},
},
{
MediaType: spec.MediaTypeImageManifest,
Annotations: map[string]string{
// will be removed later
spec.AnnotationRefName: "bar",
"dummy": "desc1",
},
},
{
MediaType: spec.MediaTypeImageManifest,
Annotations: map[string]string{
// duplicated ref name
spec.AnnotationRefName: "foo",
"dummy": "desc2",
},
},
{
MediaType: spec.MediaTypeImageManifest,
Annotations: map[string]string{
// no ref name
"dummy": "desc3",
},
},
}
for _, desc := range descs {
err := PutManifestDescriptorToIndex(img, desc)
assert.Nil(t, err)
}
err = RemoveManifestDescriptorFromIndex(img, "bar")
assert.Nil(t, err)
expected := spec.Index{
Versioned: specs.Versioned{SchemaVersion: 2},
Manifests: []spec.Descriptor{
{
MediaType: spec.MediaTypeImageManifest,
Annotations: map[string]string{
// duplicated ref name
spec.AnnotationRefName: "foo",
"dummy": "desc2",
},
},
{
MediaType: spec.MediaTypeImageManifest,
Annotations: map[string]string{
// no ref name
"dummy": "desc3",
},
},
},
}
idx, err := ReadIndex(img)
assert.Nil(t, err)
assert.Equal(t, expected, idx)
}