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74 lines
2.2 KiB
Go
74 lines
2.2 KiB
Go
package integration
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import (
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"bytes"
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"regexp"
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"testing"
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"github.com/anchore/syft/syft"
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"github.com/sergi/go-diff/diffmatchpatch"
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"github.com/anchore/syft/syft/format"
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"github.com/stretchr/testify/assert"
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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 encding 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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tests := []struct {
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format format.Option
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redactor func(in []byte) []byte
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}{
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{
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format: format.JSONOption,
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},
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{
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format: format.CycloneDxJSONOption,
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redactor: func(in []byte) []byte {
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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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},
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{
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format: format.CycloneDxXMLOption,
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redactor: func(in []byte) []byte {
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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(string(test.format), func(t *testing.T) {
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originalSBOM, _ := catalogFixtureImage(t, "image-pkg-coverage")
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by1, err := syft.Encode(originalSBOM, test.format)
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assert.NoError(t, err)
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newSBOM, newFormat, err := syft.Decode(bytes.NewReader(by1))
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assert.NoError(t, err)
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assert.Equal(t, test.format, newFormat)
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by2, err := syft.Encode(*newSBOM, test.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 !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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