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utils.go
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/
utils.go
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package testutils
import (
"bytes"
"testing"
"github.com/anchore/go-presenter"
"github.com/anchore/go-testutils"
"github.com/anchore/stereoscope/pkg/filetree"
"github.com/anchore/stereoscope/pkg/image"
"github.com/anchore/stereoscope/pkg/imagetest"
"github.com/anchore/syft/syft/distro"
"github.com/anchore/syft/syft/pkg"
"github.com/anchore/syft/syft/sbom"
"github.com/anchore/syft/syft/source"
"github.com/sergi/go-diff/diffmatchpatch"
"github.com/stretchr/testify/assert"
)
type redactor func(s []byte) []byte
type imageCfg struct {
fromSnapshot bool
}
type ImageOption func(cfg *imageCfg)
func FromSnapshot() ImageOption {
return func(cfg *imageCfg) {
cfg.fromSnapshot = true
}
}
func AssertPresenterAgainstGoldenImageSnapshot(t *testing.T, pres presenter.Presenter, testImage string, updateSnapshot bool, redactors ...redactor) {
var buffer bytes.Buffer
// grab the latest image contents and persist
if updateSnapshot {
imagetest.UpdateGoldenFixtureImage(t, testImage)
}
err := pres.Present(&buffer)
assert.NoError(t, err)
actual := buffer.Bytes()
// replace the expected snapshot contents with the current presenter contents
if updateSnapshot {
testutils.UpdateGoldenFileContents(t, actual)
}
var expected = testutils.GetGoldenFileContents(t)
// remove dynamic values, which should be tested independently
for _, r := range redactors {
actual = r(actual)
expected = r(expected)
}
// assert that the golden file snapshot matches the actual contents
if !bytes.Equal(expected, actual) {
dmp := diffmatchpatch.New()
diffs := dmp.DiffMain(string(expected), string(actual), true)
t.Errorf("mismatched output:\n%s", dmp.DiffPrettyText(diffs))
}
}
func AssertPresenterAgainstGoldenSnapshot(t *testing.T, pres presenter.Presenter, updateSnapshot bool, redactors ...redactor) {
var buffer bytes.Buffer
err := pres.Present(&buffer)
assert.NoError(t, err)
actual := buffer.Bytes()
// replace the expected snapshot contents with the current presenter contents
if updateSnapshot {
testutils.UpdateGoldenFileContents(t, actual)
}
var expected = testutils.GetGoldenFileContents(t)
// remove dynamic values, which should be tested independently
for _, r := range redactors {
actual = r(actual)
expected = r(expected)
}
if !bytes.Equal(expected, actual) {
dmp := diffmatchpatch.New()
diffs := dmp.DiffMain(string(expected), string(actual), true)
t.Errorf("mismatched output:\n%s", dmp.DiffPrettyText(diffs))
}
}
func ImageInput(t testing.TB, testImage string, options ...ImageOption) sbom.SBOM {
t.Helper()
catalog := pkg.NewCatalog()
var cfg imageCfg
var img *image.Image
for _, opt := range options {
opt(&cfg)
}
switch cfg.fromSnapshot {
case true:
img = imagetest.GetGoldenFixtureImage(t, testImage)
default:
img = imagetest.GetFixtureImage(t, "docker-archive", testImage)
}
populateImageCatalog(catalog, img)
// this is a hard coded value that is not given by the fixture helper and must be provided manually
img.Metadata.ManifestDigest = "sha256:2731251dc34951c0e50fcc643b4c5f74922dad1a5d98f302b504cf46cd5d9368"
src, err := source.NewFromImage(img, "user-image-input")
assert.NoError(t, err)
dist, err := distro.NewDistro(distro.Debian, "1.2.3", "like!")
assert.NoError(t, err)
return sbom.SBOM{
Artifacts: sbom.Artifacts{
PackageCatalog: catalog,
Distro: &dist,
},
Source: src.Metadata,
}
}
func populateImageCatalog(catalog *pkg.Catalog, img *image.Image) {
_, ref1, _ := img.SquashedTree().File("/somefile-1.txt", filetree.FollowBasenameLinks)
_, ref2, _ := img.SquashedTree().File("/somefile-2.txt", filetree.FollowBasenameLinks)
// populate catalog with test data
catalog.Add(pkg.Package{
Name: "package-1",
Version: "1.0.1",
Locations: []source.Location{
source.NewLocationFromImage(string(ref1.RealPath), *ref1, img),
},
Type: pkg.PythonPkg,
FoundBy: "the-cataloger-1",
Language: pkg.Python,
MetadataType: pkg.PythonPackageMetadataType,
Licenses: []string{"MIT"},
Metadata: pkg.PythonPackageMetadata{
Name: "package-1",
Version: "1.0.1",
},
PURL: "a-purl-1",
CPEs: []pkg.CPE{
pkg.MustCPE("cpe:2.3:*:some:package:1:*:*:*:*:*:*:*"),
},
})
catalog.Add(pkg.Package{
Name: "package-2",
Version: "2.0.1",
Locations: []source.Location{
source.NewLocationFromImage(string(ref2.RealPath), *ref2, img),
},
Type: pkg.DebPkg,
FoundBy: "the-cataloger-2",
MetadataType: pkg.DpkgMetadataType,
Metadata: pkg.DpkgMetadata{
Package: "package-2",
Version: "2.0.1",
},
PURL: "a-purl-2",
CPEs: []pkg.CPE{
pkg.MustCPE("cpe:2.3:*:some:package:2:*:*:*:*:*:*:*"),
},
})
}
func DirectoryInput(t testing.TB) sbom.SBOM {
catalog := newDirectoryCatalog()
dist, err := distro.NewDistro(distro.Debian, "1.2.3", "like!")
assert.NoError(t, err)
src, err := source.NewFromDirectory("/some/path")
assert.NoError(t, err)
return sbom.SBOM{
Artifacts: sbom.Artifacts{
PackageCatalog: catalog,
Distro: &dist,
},
Source: src.Metadata,
}
}
func newDirectoryCatalog() *pkg.Catalog {
catalog := pkg.NewCatalog()
// populate catalog with test data
catalog.Add(pkg.Package{
Name: "package-1",
Version: "1.0.1",
Type: pkg.PythonPkg,
FoundBy: "the-cataloger-1",
Locations: []source.Location{
source.NewLocation("/some/path/pkg1"),
},
Language: pkg.Python,
MetadataType: pkg.PythonPackageMetadataType,
Licenses: []string{"MIT"},
Metadata: pkg.PythonPackageMetadata{
Name: "package-1",
Version: "1.0.1",
Files: []pkg.PythonFileRecord{
{
Path: "/some/path/pkg1/dependencies/foo",
},
},
},
PURL: "a-purl-2",
CPEs: []pkg.CPE{
pkg.MustCPE("cpe:2.3:*:some:package:2:*:*:*:*:*:*:*"),
},
})
catalog.Add(pkg.Package{
Name: "package-2",
Version: "2.0.1",
Type: pkg.DebPkg,
FoundBy: "the-cataloger-2",
Locations: []source.Location{
source.NewLocation("/some/path/pkg1"),
},
MetadataType: pkg.DpkgMetadataType,
Metadata: pkg.DpkgMetadata{
Package: "package-2",
Version: "2.0.1",
},
PURL: "a-purl-2",
CPEs: []pkg.CPE{
pkg.MustCPE("cpe:2.3:*:some:package:2:*:*:*:*:*:*:*"),
},
})
return catalog
}