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|
package prioritize
import (
"fmt"
"slices"
"testing"
"time"
"github.com/containers/image/v5/internal/blobinfocache"
"github.com/containers/image/v5/pkg/compression"
compressiontypes "github.com/containers/image/v5/pkg/compression/types"
"github.com/containers/image/v5/types"
"github.com/opencontainers/go-digest"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
)
const (
digestUncompressed = digest.Digest("sha256:2222222222222222222222222222222222222222222222222222222222222222")
digestCompressedA = digest.Digest("sha256:3333333333333333333333333333333333333333333333333333333333333333")
digestCompressedB = digest.Digest("sha256:4444444444444444444444444444444444444444444444444444444444444444")
digestCompressedPrimary = digest.Digest("sha256:6666666666666666666666666666666666666666666666666666666666666666")
)
var (
// inputReplacementCandidates contains a non-trivial candidateSortState shared among several tests below.
inputReplacementCandidates = []CandidateWithTime{
{blobinfocache.BICReplacementCandidate2{Digest: digestCompressedA, Location: types.BICLocationReference{Opaque: "A1"}, CompressionOperation: types.Compress, CompressionAlgorithm: &compression.Xz}, time.Unix(1, 0)},
{blobinfocache.BICReplacementCandidate2{Digest: digestUncompressed, Location: types.BICLocationReference{Opaque: "U2"}, CompressionOperation: types.Compress, CompressionAlgorithm: &compression.Gzip}, time.Unix(1, 1)},
{blobinfocache.BICReplacementCandidate2{Digest: digestCompressedA, Location: types.BICLocationReference{Opaque: "A2"}, CompressionOperation: types.Decompress, CompressionAlgorithm: nil}, time.Unix(1, 1)},
{blobinfocache.BICReplacementCandidate2{Digest: digestCompressedPrimary, Location: types.BICLocationReference{Opaque: "P1"}}, time.Unix(1, 0)},
{blobinfocache.BICReplacementCandidate2{Digest: digestCompressedB, Location: types.BICLocationReference{Opaque: "B1"}, CompressionOperation: types.Compress, CompressionAlgorithm: &compression.Bzip2}, time.Unix(1, 1)},
{blobinfocache.BICReplacementCandidate2{Digest: digestCompressedPrimary, Location: types.BICLocationReference{Opaque: "P2"}, CompressionOperation: types.Compress, CompressionAlgorithm: &compression.Gzip}, time.Unix(1, 1)},
{blobinfocache.BICReplacementCandidate2{Digest: digestCompressedB, Location: types.BICLocationReference{Opaque: "B2"}, CompressionOperation: types.Decompress, CompressionAlgorithm: nil}, time.Unix(2, 0)},
{blobinfocache.BICReplacementCandidate2{Digest: digestUncompressed, Location: types.BICLocationReference{Opaque: "U1"}}, time.Unix(1, 0)},
{blobinfocache.BICReplacementCandidate2{Digest: digestUncompressed, UnknownLocation: true, Location: types.BICLocationReference{Opaque: ""}}, time.Time{}},
{blobinfocache.BICReplacementCandidate2{Digest: digestCompressedA, UnknownLocation: true, Location: types.BICLocationReference{Opaque: ""}}, time.Time{}},
{blobinfocache.BICReplacementCandidate2{Digest: digestCompressedB, UnknownLocation: true, Location: types.BICLocationReference{Opaque: ""}}, time.Time{}},
{blobinfocache.BICReplacementCandidate2{Digest: digestCompressedPrimary, UnknownLocation: true, Location: types.BICLocationReference{Opaque: ""}}, time.Time{}},
}
// expectedReplacementCandidates is the fully-sorted, unlimited, result of prioritizing inputReplacementCandidates.
expectedReplacementCandidates = []blobinfocache.BICReplacementCandidate2{
{Digest: digestCompressedPrimary, Location: types.BICLocationReference{Opaque: "P2"}, CompressionOperation: types.Compress, CompressionAlgorithm: &compression.Gzip},
{Digest: digestCompressedPrimary, Location: types.BICLocationReference{Opaque: "P1"}},
{Digest: digestCompressedB, Location: types.BICLocationReference{Opaque: "B2"}, CompressionOperation: types.Decompress, CompressionAlgorithm: nil},
{Digest: digestCompressedA, Location: types.BICLocationReference{Opaque: "A2"}, CompressionOperation: types.Decompress, CompressionAlgorithm: nil},
{Digest: digestCompressedB, Location: types.BICLocationReference{Opaque: "B1"}, CompressionOperation: types.Compress, CompressionAlgorithm: &compression.Bzip2},
{Digest: digestCompressedA, Location: types.BICLocationReference{Opaque: "A1"}, CompressionOperation: types.Compress, CompressionAlgorithm: &compression.Xz},
{Digest: digestUncompressed, Location: types.BICLocationReference{Opaque: "U2"}, CompressionOperation: types.Compress, CompressionAlgorithm: &compression.Gzip},
{Digest: digestUncompressed, Location: types.BICLocationReference{Opaque: "U1"}},
{Digest: digestCompressedPrimary, UnknownLocation: true, Location: types.BICLocationReference{Opaque: ""}},
{Digest: digestCompressedA, UnknownLocation: true, Location: types.BICLocationReference{Opaque: ""}},
{Digest: digestCompressedB, UnknownLocation: true, Location: types.BICLocationReference{Opaque: ""}},
{Digest: digestUncompressed, UnknownLocation: true, Location: types.BICLocationReference{Opaque: ""}},
}
)
func TestCandidateTemplateWithCompression(t *testing.T) {
chunkedAnnotations := map[string]string{"a": "b"}
uncompressedData := blobinfocache.DigestCompressorData{
BaseVariantCompressor: blobinfocache.Uncompressed,
SpecificVariantCompressor: blobinfocache.UnknownCompression,
SpecificVariantAnnotations: nil,
}
gzipData := blobinfocache.DigestCompressorData{
BaseVariantCompressor: compressiontypes.GzipAlgorithmName,
SpecificVariantCompressor: blobinfocache.UnknownCompression,
SpecificVariantAnnotations: nil,
}
zstdData := blobinfocache.DigestCompressorData{
BaseVariantCompressor: compressiontypes.ZstdAlgorithmName,
SpecificVariantCompressor: blobinfocache.UnknownCompression,
SpecificVariantAnnotations: nil,
}
zstdChunkedData := blobinfocache.DigestCompressorData{
BaseVariantCompressor: compressiontypes.ZstdAlgorithmName,
SpecificVariantCompressor: compressiontypes.ZstdChunkedAlgorithmName,
SpecificVariantAnnotations: chunkedAnnotations,
}
for _, c := range []struct {
name string
requiredCompression *compressiontypes.Algorithm
data blobinfocache.DigestCompressorData
v2Matches bool
// if v2Matches:
v2Op types.LayerCompression
v2Algo string
v2Annotations map[string]string
}{
{
name: "unknown",
requiredCompression: nil,
data: blobinfocache.DigestCompressorData{
BaseVariantCompressor: blobinfocache.UnknownCompression,
SpecificVariantCompressor: blobinfocache.UnknownCompression,
SpecificVariantAnnotations: nil,
},
v2Matches: false,
},
{
name: "uncompressed",
requiredCompression: nil,
data: uncompressedData,
v2Matches: true,
v2Op: types.Decompress,
v2Algo: "",
v2Annotations: nil,
},
{
name: "uncompressed, want gzip",
requiredCompression: &compression.Gzip,
data: uncompressedData,
v2Matches: false,
},
{
name: "gzip",
requiredCompression: nil,
data: gzipData,
v2Matches: true,
v2Op: types.Compress,
v2Algo: compressiontypes.GzipAlgorithmName,
v2Annotations: nil,
},
{
name: "gzip, want zstd",
requiredCompression: &compression.Zstd,
data: gzipData,
v2Matches: false,
},
{
name: "unknown base",
requiredCompression: nil,
data: blobinfocache.DigestCompressorData{
BaseVariantCompressor: "this value is unknown",
SpecificVariantCompressor: blobinfocache.UnknownCompression,
SpecificVariantAnnotations: nil,
},
v2Matches: false,
},
{
name: "zstd",
requiredCompression: nil,
data: zstdData,
v2Matches: true,
v2Op: types.Compress,
v2Algo: compressiontypes.ZstdAlgorithmName,
v2Annotations: nil,
},
{
name: "zstd, want gzip",
requiredCompression: &compression.Gzip,
data: zstdData,
v2Matches: false,
},
{
name: "zstd, want zstd",
requiredCompression: &compression.Zstd,
data: zstdData,
v2Matches: true,
v2Op: types.Compress,
v2Algo: compressiontypes.ZstdAlgorithmName,
v2Annotations: nil,
},
{
name: "zstd, want zstd:chunked",
requiredCompression: &compression.ZstdChunked,
data: zstdData,
v2Matches: false,
},
{
name: "zstd:chunked",
requiredCompression: nil,
data: zstdChunkedData,
v2Matches: true,
v2Op: types.Compress,
v2Algo: compressiontypes.ZstdChunkedAlgorithmName,
v2Annotations: chunkedAnnotations,
},
{
name: "zstd:chunked, want gzip",
requiredCompression: &compression.Gzip,
data: zstdChunkedData,
v2Matches: false,
},
{
name: "zstd:chunked, want zstd", // Note that we return the full chunked data in this case.
requiredCompression: &compression.Zstd,
data: zstdChunkedData,
v2Matches: true,
v2Op: types.Compress,
v2Algo: compressiontypes.ZstdChunkedAlgorithmName,
v2Annotations: chunkedAnnotations,
},
{
name: "zstd:chunked, want zstd:chunked",
requiredCompression: &compression.ZstdChunked,
data: zstdChunkedData,
v2Matches: true,
v2Op: types.Compress,
v2Algo: compressiontypes.ZstdChunkedAlgorithmName,
v2Annotations: chunkedAnnotations,
},
{
name: "zstd:unknown",
requiredCompression: nil,
data: blobinfocache.DigestCompressorData{
BaseVariantCompressor: compressiontypes.ZstdAlgorithmName,
SpecificVariantCompressor: "this value is unknown",
SpecificVariantAnnotations: chunkedAnnotations,
},
v2Matches: true,
v2Op: types.Compress,
v2Algo: compressiontypes.ZstdAlgorithmName,
v2Annotations: nil,
},
} {
res := CandidateTemplateWithCompression(nil, digestCompressedPrimary, c.data)
assert.Equal(t, &CandidateTemplate{
digest: digestCompressedPrimary,
compressionOperation: types.PreserveOriginal,
compressionAlgorithm: nil,
compressionAnnotations: nil,
}, res, c.name)
// These tests only use RequiredCompression in CandidateLocations2Options for clarity;
// CandidateCompressionMatchesReuseConditions should have its own tests of handling the full set of options.
res = CandidateTemplateWithCompression(&blobinfocache.CandidateLocations2Options{
RequiredCompression: c.requiredCompression,
}, digestCompressedPrimary, c.data)
if !c.v2Matches {
assert.Nil(t, res, c.name)
} else {
require.NotNil(t, res, c.name)
assert.Equal(t, digestCompressedPrimary, res.digest, c.name)
assert.Equal(t, c.v2Op, res.compressionOperation, c.name)
if c.v2Algo == "" {
assert.Nil(t, res.compressionAlgorithm, c.name)
} else {
require.NotNil(t, res.compressionAlgorithm, c.name)
assert.Equal(t, c.v2Algo, res.compressionAlgorithm.Name())
}
assert.Equal(t, c.v2Annotations, res.compressionAnnotations, c.name)
}
}
}
func TestCandidateWithLocation(t *testing.T) {
template := CandidateTemplateWithCompression(&blobinfocache.CandidateLocations2Options{}, digestCompressedPrimary, blobinfocache.DigestCompressorData{
BaseVariantCompressor: compressiontypes.ZstdAlgorithmName,
SpecificVariantCompressor: compressiontypes.ZstdChunkedAlgorithmName,
SpecificVariantAnnotations: map[string]string{"a": "b"},
})
require.NotNil(t, template)
loc := types.BICLocationReference{Opaque: "opaque"}
time := time.Now()
res := template.CandidateWithLocation(loc, time)
assert.Equal(t, digestCompressedPrimary, res.candidate.Digest)
assert.Equal(t, types.Compress, res.candidate.CompressionOperation)
assert.Equal(t, compressiontypes.ZstdChunkedAlgorithmName, res.candidate.CompressionAlgorithm.Name())
assert.Equal(t, map[string]string{"a": "b"}, res.candidate.CompressionAnnotations)
assert.Equal(t, false, res.candidate.UnknownLocation)
assert.Equal(t, loc, res.candidate.Location)
assert.Equal(t, time, res.lastSeen)
}
func TestCandidateWithUnknownLocation(t *testing.T) {
template := CandidateTemplateWithCompression(&blobinfocache.CandidateLocations2Options{}, digestCompressedPrimary, blobinfocache.DigestCompressorData{
BaseVariantCompressor: compressiontypes.ZstdAlgorithmName,
SpecificVariantCompressor: compressiontypes.ZstdChunkedAlgorithmName,
SpecificVariantAnnotations: map[string]string{"a": "b"},
})
require.NotNil(t, template)
res := template.CandidateWithUnknownLocation()
assert.Equal(t, digestCompressedPrimary, res.candidate.Digest)
assert.Equal(t, types.Compress, res.candidate.CompressionOperation)
assert.Equal(t, compressiontypes.ZstdChunkedAlgorithmName, res.candidate.CompressionAlgorithm.Name())
assert.Equal(t, map[string]string{"a": "b"}, res.candidate.CompressionAnnotations)
assert.Equal(t, true, res.candidate.UnknownLocation)
}
func TestCandidateSortStateLess(t *testing.T) {
type p struct {
d digest.Digest
t int64
}
// Primary criteria: Also ensure that time does not matter
for _, c := range []struct {
name string
res int
d0, d1 digest.Digest
}{
{"primary < any", -1, digestCompressedPrimary, digestCompressedA},
{"any < uncompressed", -1, digestCompressedA, digestUncompressed},
{"primary < uncompressed", -1, digestCompressedPrimary, digestUncompressed},
} {
for _, tms := range [][2]int64{{1, 2}, {2, 1}, {1, 1}} {
caseName := fmt.Sprintf("%s %v", c.name, tms)
c0 := CandidateWithTime{blobinfocache.BICReplacementCandidate2{Digest: c.d0, Location: types.BICLocationReference{Opaque: "L0"}, CompressionOperation: types.Compress, CompressionAlgorithm: &compression.Gzip}, time.Unix(tms[0], 0)}
c1 := CandidateWithTime{blobinfocache.BICReplacementCandidate2{Digest: c.d1, Location: types.BICLocationReference{Opaque: "L1"}, CompressionOperation: types.Compress, CompressionAlgorithm: &compression.Zstd}, time.Unix(tms[1], 0)}
css := candidateSortState{
primaryDigest: digestCompressedPrimary,
uncompressedDigest: digestUncompressed,
}
assert.Equal(t, c.res, css.compare(c0, c1), caseName)
assert.Equal(t, -c.res, css.compare(c1, c0), caseName)
if c.d0 != digestUncompressed && c.d1 != digestUncompressed {
css.uncompressedDigest = ""
assert.Equal(t, c.res, css.compare(c0, c1), caseName)
assert.Equal(t, -c.res, css.compare(c1, c0), caseName)
css.uncompressedDigest = css.primaryDigest
assert.Equal(t, c.res, css.compare(c0, c1), caseName)
assert.Equal(t, -c.res, css.compare(c1, c0), caseName)
}
}
}
// Ordering within the three primary groups
for _, c := range []struct {
name string
res int
p0, p1 p
}{
{"primary: t=2 < t=1", -1, p{digestCompressedPrimary, 2}, p{digestCompressedPrimary, 1}},
{"primary: t=1 == t=1", 0, p{digestCompressedPrimary, 1}, p{digestCompressedPrimary, 1}},
{"uncompressed: t=2 < t=1", -1, p{digestUncompressed, 2}, p{digestUncompressed, 1}},
{"uncompressed: t=1 == t=1", 0, p{digestUncompressed, 1}, p{digestUncompressed, 1}},
{"any: t=2 < t=1, [d=A vs. d=B lower-priority]", -1, p{digestCompressedA, 2}, p{digestCompressedB, 1}},
{"any: t=2 < t=1, [d=B vs. d=A lower-priority]", -1, p{digestCompressedB, 2}, p{digestCompressedA, 1}},
{"any: t=2 < t=1, [d=A vs. d=A lower-priority]", -1, p{digestCompressedA, 2}, p{digestCompressedA, 1}},
{"any: t=1 == t=1, d=A < d=B", -1, p{digestCompressedA, 1}, p{digestCompressedB, 1}},
{"any: t=1 == t=1, d=A == d=A", 0, p{digestCompressedA, 1}, p{digestCompressedA, 1}},
} {
c0 := CandidateWithTime{blobinfocache.BICReplacementCandidate2{Digest: c.p0.d, Location: types.BICLocationReference{Opaque: "L0"}, CompressionOperation: types.Compress, CompressionAlgorithm: &compression.Gzip}, time.Unix(c.p0.t, 0)}
c1 := CandidateWithTime{blobinfocache.BICReplacementCandidate2{Digest: c.p1.d, Location: types.BICLocationReference{Opaque: "L1"}, CompressionOperation: types.Compress, CompressionAlgorithm: &compression.Zstd}, time.Unix(c.p1.t, 0)}
css := candidateSortState{
primaryDigest: digestCompressedPrimary,
uncompressedDigest: digestUncompressed,
}
assert.Equal(t, c.res, css.compare(c0, c1), c.name)
assert.Equal(t, -c.res, css.compare(c1, c0), c.name)
if c.p0.d != digestUncompressed && c.p1.d != digestUncompressed {
css.uncompressedDigest = ""
assert.Equal(t, c.res, css.compare(c0, c1), c.name)
assert.Equal(t, -c.res, css.compare(c1, c0), c.name)
css.uncompressedDigest = css.primaryDigest
assert.Equal(t, c.res, css.compare(c0, c1), c.name)
assert.Equal(t, -c.res, css.compare(c1, c0), c.name)
}
}
}
func TestDestructivelyPrioritizeReplacementCandidatesWithMax(t *testing.T) {
totalUnknownLocationCandidates := 4
for _, totalLimit := range []int{0, 1, replacementAttempts, 100, replacementUnknownLocationAttempts} {
for _, noLocationLimit := range []int{0, 1, replacementAttempts, 100, replacementUnknownLocationAttempts} {
totalKnownLocationCandidates := len(expectedReplacementCandidates) - totalUnknownLocationCandidates
allowedUnknown := min(noLocationLimit, totalUnknownLocationCandidates)
expectedLen := min(totalKnownLocationCandidates+allowedUnknown, totalLimit)
res := destructivelyPrioritizeReplacementCandidatesWithMax(slices.Clone(inputReplacementCandidates), digestCompressedPrimary, digestUncompressed, totalLimit, noLocationLimit)
assert.Equal(t, expectedReplacementCandidates[:expectedLen], res)
}
}
}
func TestDestructivelyPrioritizeReplacementCandidates(t *testing.T) {
// Just a smoke test; we mostly rely on test coverage in TestCandidateSortStateLess
res := DestructivelyPrioritizeReplacementCandidates(slices.Clone(inputReplacementCandidates), digestCompressedPrimary, digestUncompressed)
assert.Equal(t, expectedReplacementCandidates[:replacementAttempts], res)
}
|
