mirror of
https://github.com/anchore/syft.git
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104 lines
3.2 KiB
Go
104 lines
3.2 KiB
Go
package integration
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import (
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"bytes"
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"fmt"
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"regexp"
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"testing"
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"github.com/google/go-cmp/cmp"
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"github.com/sergi/go-diff/diffmatchpatch"
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"github.com/stretchr/testify/assert"
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"github.com/stretchr/testify/require"
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"github.com/anchore/syft/syft/formats"
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"github.com/anchore/syft/syft/formats/cyclonedxjson"
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"github.com/anchore/syft/syft/formats/cyclonedxxml"
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"github.com/anchore/syft/syft/formats/syftjson"
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"github.com/anchore/syft/syft/sbom"
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"github.com/anchore/syft/syft/source"
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)
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// TestEncodeDecodeEncodeCycleComparison is testing for differences in how SBOM documents get encoded on multiple cycles.
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// By encoding and decoding the sbom we can compare the differences between the set of resulting objects. However,
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// this requires specific comparisons being done, and select redactions/omissions being made. Additionally, there are
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// already unit tests on each format encoder-decoder for properly functioning comparisons in depth, so there is no need
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// to do an object-to-object comparison. For this reason this test focuses on a bytes-to-bytes comparison after an
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// encode-decode-encode loop which will detect lossy behavior in both directions.
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func TestEncodeDecodeEncodeCycleComparison(t *testing.T) {
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// use second image for relationships
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images := []string{"image-pkg-coverage", "image-owning-package"}
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tests := []struct {
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formatOption sbom.FormatID
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redactor func(in []byte) []byte
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json bool
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}{
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{
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formatOption: syftjson.ID,
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redactor: func(in []byte) []byte {
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// no redactions necessary
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return in
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},
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json: true,
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},
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{
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formatOption: cyclonedxjson.ID,
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redactor: func(in []byte) []byte {
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// unstable values
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in = regexp.MustCompile(`"(timestamp|serialNumber|bom-ref)": "[^"]+",`).ReplaceAll(in, []byte{})
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return in
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},
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json: true,
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},
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{
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formatOption: cyclonedxxml.ID,
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redactor: func(in []byte) []byte {
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// unstable values
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in = regexp.MustCompile(`(serialNumber|bom-ref)="[^"]+"`).ReplaceAll(in, []byte{})
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in = regexp.MustCompile(`<timestamp>[^<]+</timestamp>`).ReplaceAll(in, []byte{})
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return in
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},
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},
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}
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for _, test := range tests {
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t.Run(fmt.Sprintf("%s", test.formatOption), func(t *testing.T) {
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for _, image := range images {
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originalSBOM, _ := catalogFixtureImage(t, image, source.SquashedScope, nil)
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format := formats.ByName(string(test.formatOption))
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require.NotNil(t, format)
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by1, err := formats.Encode(originalSBOM, format)
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assert.NoError(t, err)
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newSBOM, newFormat, err := formats.Decode(bytes.NewReader(by1))
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assert.NoError(t, err)
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assert.Equal(t, format.ID(), newFormat.ID())
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by2, err := formats.Encode(*newSBOM, format)
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assert.NoError(t, err)
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if test.redactor != nil {
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by1 = test.redactor(by1)
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by2 = test.redactor(by2)
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}
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if test.json {
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s1 := string(by1)
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s2 := string(by2)
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if diff := cmp.Diff(s1, s2); diff != "" {
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t.Errorf("Encode/Decode mismatch (-want +got) [image %q]:\n%s", image, diff)
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}
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} else if !assert.True(t, bytes.Equal(by1, by2)) {
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dmp := diffmatchpatch.New()
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diffs := dmp.DiffMain(string(by1), string(by2), true)
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t.Errorf("diff: %s", dmp.DiffPrettyText(diffs))
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}
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}
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})
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}
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}
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