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package directory
import (
"bytes"
"context"
"errors"
"io"
"os"
"testing"
"github.com/containers/image/v5/internal/private"
"github.com/containers/image/v5/manifest"
"github.com/containers/image/v5/pkg/blobinfocache/memory"
"github.com/containers/image/v5/types"
"github.com/opencontainers/go-digest"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
)
var _ private.ImageSource = (*dirImageSource)(nil)
var _ private.ImageDestination = (*dirImageDestination)(nil)
func TestDestinationReference(t *testing.T) {
ref, tmpDir := refToTempDir(t)
dest, err := ref.NewImageDestination(context.Background(), nil)
require.NoError(t, err)
defer dest.Close()
ref2 := dest.Reference()
assert.Equal(t, tmpDir, ref2.StringWithinTransport())
}
func TestGetPutManifest(t *testing.T) {
ref, _ := refToTempDir(t)
man := []byte("test-manifest")
list := []byte("test-manifest-list")
md, err := manifest.Digest(man)
require.NoError(t, err)
dest, err := ref.NewImageDestination(context.Background(), nil)
require.NoError(t, err)
defer dest.Close()
err = dest.PutManifest(context.Background(), man, &md)
assert.NoError(t, err)
err = dest.PutManifest(context.Background(), list, nil)
assert.NoError(t, err)
err = dest.Commit(context.Background(), nil) // nil unparsedToplevel is invalid, we don’t currently use the value
assert.NoError(t, err)
src, err := ref.NewImageSource(context.Background(), nil)
require.NoError(t, err)
defer src.Close()
m, mt, err := src.GetManifest(context.Background(), nil)
assert.NoError(t, err)
assert.Equal(t, list, m)
assert.Equal(t, "", mt)
m, mt, err = src.GetManifest(context.Background(), &md)
assert.NoError(t, err)
assert.Equal(t, man, m)
assert.Equal(t, "", mt)
}
func TestGetPutBlob(t *testing.T) {
computedBlob := []byte("test-blob")
providedBlob := []byte("provided-blob")
providedDigest := digest.Digest("sha256:provided-test-digest")
ref, _ := refToTempDir(t)
cache := memory.New()
dest, err := ref.NewImageDestination(context.Background(), nil)
require.NoError(t, err)
defer dest.Close()
assert.Equal(t, types.PreserveOriginal, dest.DesiredLayerCompression())
// PutBlob with caller-provided data
providedInfo, err := dest.PutBlob(context.Background(), bytes.NewReader(providedBlob), types.BlobInfo{Digest: providedDigest, Size: int64(len(providedBlob))}, cache, false)
assert.NoError(t, err)
assert.Equal(t, int64(len(providedBlob)), providedInfo.Size)
assert.Equal(t, providedDigest, providedInfo.Digest)
// PutBlob with unknown data
computedInfo, err := dest.PutBlob(context.Background(), bytes.NewReader(computedBlob), types.BlobInfo{Digest: "", Size: int64(-1)}, cache, false)
assert.NoError(t, err)
assert.Equal(t, int64(len(computedBlob)), computedInfo.Size)
assert.Equal(t, digest.FromBytes(computedBlob), computedInfo.Digest)
err = dest.Commit(context.Background(), nil) // nil unparsedToplevel is invalid, we don’t currently use the value
assert.NoError(t, err)
src, err := ref.NewImageSource(context.Background(), nil)
require.NoError(t, err)
defer src.Close()
for digest, expectedBlob := range map[digest.Digest][]byte{
providedInfo.Digest: providedBlob,
computedInfo.Digest: computedBlob,
} {
rc, size, err := src.GetBlob(context.Background(), types.BlobInfo{Digest: digest, Size: int64(len(expectedBlob))}, cache)
assert.NoError(t, err)
defer rc.Close()
b, err := io.ReadAll(rc)
assert.NoError(t, err)
assert.Equal(t, expectedBlob, b)
assert.Equal(t, int64(len(expectedBlob)), size)
}
}
// readerFromFunc allows implementing Reader by any function, e.g. a closure.
type readerFromFunc func([]byte) (int, error)
func (fn readerFromFunc) Read(p []byte) (int, error) {
return fn(p)
}
// TestPutBlobDigestFailure simulates behavior on digest verification failure.
func TestPutBlobDigestFailure(t *testing.T) {
const digestErrorString = "Simulated digest error"
const blobDigest = digest.Digest("sha256:test-digest")
ref, _ := refToTempDir(t)
dirRef, ok := ref.(dirReference)
require.True(t, ok)
blobPath := dirRef.layerPath(blobDigest)
cache := memory.New()
firstRead := true
reader := readerFromFunc(func(p []byte) (int, error) {
_, err := os.Lstat(blobPath)
require.Error(t, err)
require.True(t, os.IsNotExist(err))
if firstRead {
if len(p) > 0 {
firstRead = false
}
for i := 0; i < len(p); i++ {
p[i] = 0xAA
}
return len(p), nil
}
return 0, errors.New(digestErrorString)
})
dest, err := ref.NewImageDestination(context.Background(), nil)
require.NoError(t, err)
defer dest.Close()
_, err = dest.PutBlob(context.Background(), reader, types.BlobInfo{Digest: blobDigest, Size: -1}, cache, false)
assert.ErrorContains(t, err, digestErrorString)
err = dest.Commit(context.Background(), nil) // nil unparsedToplevel is invalid, we don’t currently use the value
assert.NoError(t, err)
_, err = os.Lstat(blobPath)
require.Error(t, err)
require.True(t, os.IsNotExist(err))
}
func TestGetPutSignatures(t *testing.T) {
ref, _ := refToTempDir(t)
man := []byte("test-manifest")
list := []byte("test-manifest-list")
md, err := manifest.Digest(man)
require.NoError(t, err)
// These signatures are completely invalid; start with 0xA3 just to be minimally plausible to signature.FromBlob.
signatures := [][]byte{
[]byte("\xA3sig1"),
[]byte("\xA3sig2"),
}
listSignatures := [][]byte{
[]byte("\xA3sig3"),
[]byte("\xA3sig4"),
}
dest, err := ref.NewImageDestination(context.Background(), nil)
require.NoError(t, err)
defer dest.Close()
err = dest.SupportsSignatures(context.Background())
assert.NoError(t, err)
err = dest.PutManifest(context.Background(), man, &md)
require.NoError(t, err)
err = dest.PutManifest(context.Background(), list, nil)
require.NoError(t, err)
err = dest.PutSignatures(context.Background(), signatures, &md)
assert.NoError(t, err)
err = dest.PutSignatures(context.Background(), listSignatures, nil)
assert.NoError(t, err)
err = dest.Commit(context.Background(), nil) // nil unparsedToplevel is invalid, we don’t currently use the value
assert.NoError(t, err)
src, err := ref.NewImageSource(context.Background(), nil)
require.NoError(t, err)
defer src.Close()
sigs, err := src.GetSignatures(context.Background(), nil)
assert.NoError(t, err)
assert.Equal(t, listSignatures, sigs)
sigs, err = src.GetSignatures(context.Background(), &md)
assert.NoError(t, err)
assert.Equal(t, signatures, sigs)
}
func TestSourceReference(t *testing.T) {
ref, tmpDir := refToTempDir(t)
src, err := ref.NewImageSource(context.Background(), nil)
require.NoError(t, err)
defer src.Close()
ref2 := src.Reference()
assert.Equal(t, tmpDir, ref2.StringWithinTransport())
}
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