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package copy
import (
"bytes"
"errors"
"fmt"
"io"
"os"
"testing"
"time"
"github.com/containers/image/v5/internal/private"
"github.com/containers/image/v5/pkg/compression"
compressiontypes "github.com/containers/image/v5/pkg/compression/types"
"github.com/containers/image/v5/types"
digest "github.com/opencontainers/go-digest"
imgspecv1 "github.com/opencontainers/image-spec/specs-go/v1"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
)
func TestUpdatedBlobInfoFromReuse(t *testing.T) {
srcInfo := types.BlobInfo{
Digest: "sha256:6a5a5368e0c2d3e5909184fa28ddfd56072e7ff3ee9a945876f7eee5896ef5bb",
Size: 51354364,
URLs: []string{"https://layer.url"},
Annotations: map[string]string{"test-annotation-2": "two"},
MediaType: imgspecv1.MediaTypeImageLayerGzip,
CompressionOperation: types.Compress, // Might be set by blobCacheSource.LayerInfosForCopy
CompressionAlgorithm: &compression.Gzip, // Set e.g. in copyLayer
// CryptoOperation is not set by LayerInfos()
}
for _, c := range []struct {
reused private.ReusedBlob
expected types.BlobInfo
}{
{ // A straightforward reuse without substitution
reused: private.ReusedBlob{
Digest: "sha256:6a5a5368e0c2d3e5909184fa28ddfd56072e7ff3ee9a945876f7eee5896ef5bb",
Size: 51354364,
// CompressionOperation not set
// CompressionAlgorithm not set
},
expected: types.BlobInfo{
Digest: "sha256:6a5a5368e0c2d3e5909184fa28ddfd56072e7ff3ee9a945876f7eee5896ef5bb",
Size: 51354364,
URLs: nil,
Annotations: map[string]string{"test-annotation-2": "two"},
MediaType: imgspecv1.MediaTypeImageLayerGzip,
CompressionOperation: types.Compress, // Might be set by blobCacheSource.LayerInfosForCopy
CompressionAlgorithm: &compression.Gzip, // Set e.g. in copyLayer
// CryptoOperation is set to the zero value
},
},
{ // Reuse with substitution
reused: private.ReusedBlob{
Digest: "sha256:aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",
Size: 513543640,
CompressionOperation: types.Decompress,
CompressionAlgorithm: nil,
},
expected: types.BlobInfo{
Digest: "sha256:aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",
Size: 513543640,
URLs: nil,
Annotations: map[string]string{"test-annotation-2": "two"},
MediaType: imgspecv1.MediaTypeImageLayerGzip,
CompressionOperation: types.Decompress,
CompressionAlgorithm: nil,
// CryptoOperation is set to the zero value
},
},
} {
res := updatedBlobInfoFromReuse(srcInfo, c.reused)
assert.Equal(t, c.expected, res, fmt.Sprintf("%#v", c.reused))
}
}
func goDiffIDComputationGoroutineWithTimeout(layerStream io.ReadCloser, decompressor compressiontypes.DecompressorFunc) *diffIDResult {
ch := make(chan diffIDResult)
go diffIDComputationGoroutine(ch, layerStream, decompressor)
timeout := time.After(time.Second)
select {
case res := <-ch:
return &res
case <-timeout:
return nil
}
}
func TestDiffIDComputationGoroutine(t *testing.T) {
stream, err := os.Open("fixtures/Hello.uncompressed")
require.NoError(t, err)
res := goDiffIDComputationGoroutineWithTimeout(stream, nil)
require.NotNil(t, res)
assert.NoError(t, res.err)
assert.Equal(t, "sha256:185f8db32271fe25f561a6fc938b2e264306ec304eda518007d1764826381969", res.digest.String())
// Error reading input
reader, writer := io.Pipe()
err = writer.CloseWithError(errors.New("Expected error reading input in diffIDComputationGoroutine"))
require.NoError(t, err)
res = goDiffIDComputationGoroutineWithTimeout(reader, nil)
require.NotNil(t, res)
assert.Error(t, res.err)
}
func TestComputeDiffID(t *testing.T) {
for _, c := range []struct {
filename string
decompressor compressiontypes.DecompressorFunc
result digest.Digest
}{
{"fixtures/Hello.uncompressed", nil, "sha256:185f8db32271fe25f561a6fc938b2e264306ec304eda518007d1764826381969"},
{"fixtures/Hello.gz", nil, "sha256:0bd4409dcd76476a263b8f3221b4ce04eb4686dec40bfdcc2e86a7403de13609"},
{"fixtures/Hello.gz", compression.GzipDecompressor, "sha256:185f8db32271fe25f561a6fc938b2e264306ec304eda518007d1764826381969"},
{"fixtures/Hello.zst", nil, "sha256:361a8e0372ad438a0316eb39a290318364c10b60d0a7e55b40aa3eafafc55238"},
{"fixtures/Hello.zst", compression.ZstdDecompressor, "sha256:185f8db32271fe25f561a6fc938b2e264306ec304eda518007d1764826381969"},
} {
stream, err := os.Open(c.filename)
require.NoError(t, err, c.filename)
defer stream.Close()
diffID, err := computeDiffID(stream, c.decompressor)
require.NoError(t, err, c.filename)
assert.Equal(t, c.result, diffID)
}
// Error initializing decompression
_, err := computeDiffID(bytes.NewReader([]byte{}), compression.GzipDecompressor)
assert.Error(t, err)
// Error reading input
reader, writer := io.Pipe()
defer reader.Close()
err = writer.CloseWithError(errors.New("Expected error reading input in computeDiffID"))
require.NoError(t, err)
_, err = computeDiffID(reader, nil)
assert.Error(t, err)
}
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