fix(test): Add custom comparer to ignore timestamps in capture tests (#…

…1173)

# Description

Previously, in [PR 894](#894),
timestamps were introduced to be able to print capture names as their
jobs were beginning.

This PR addresses an oversight in the testing which compared whether the
timestamp of the test and the timestamp of the test capture were the
same. This was not always the case - particularly if there was some
delay between the beginning of the test and the beginning of the
capture. The change in this PR adds a custom comparer to the `cmp.Diff`
which ignores the timestamp environment variables.

## Related Issue

[1045](#1045)

## Checklist

- [x] I have read the [contributing
documentation](https://retina.sh/docs/contributing).
- [x] I signed and signed-off the commits (`git commit -S -s ...`). See
[this
documentation](https://docs.github.com/en/authentication/managing-commit-signature-verification/about-commit-signature-verification)
on signing commits.
- [x] I have correctly attributed the author(s) of the code.
- [x] I have tested the changes locally.
- [x] I have followed the project's style guidelines.
- [ ] I have updated the documentation, if necessary.
- [x] I have added tests, if applicable.

## Testing Completed

The tests now succeed regardless of whether a delay occurs or not -
causing the timestamps to differ. This was simulated with an artificial
delay with `time.Sleep`.

---

Please refer to the [CONTRIBUTING.md](../CONTRIBUTING.md) file for more
information on how to contribute to this project.

---------

Signed-off-by: Kamil <[email protected]>

pkg/capture/crd_to_job_test.go

@@ -820,6 +820,10 @@ func Test_CaptureToPodTranslator_ValidateCapture(t *testing.T) {
 	}
 }
 
+func isIgnorableEnvVar(envVar corev1.EnvVar) bool {
+	return envVar.Name == captureConstants.CaptureStartTimestampEnvKey
+}
+
 func Test_CaptureToPodTranslator_TranslateCaptureToJobs(t *testing.T) {
 	captureName := "capture-test"
 	hostPath := "/tmp/capture"
@@ -1719,6 +1723,15 @@ func Test_CaptureToPodTranslator_TranslateCaptureToJobs(t *testing.T) {
 			job.Spec.Template.Spec.Containers[0].VolumeMounts = tt.volumeMounts
 			job.Spec.Template.Spec.Volumes = tt.volumes
 
+			for _, env := range tt.podEnv {
+				if env.Name == captureConstants.CaptureStartTimestampEnvKey {
+					_, err := file.StringToTimestamp(env.Value)
+					if err != nil {
+						t.Errorf("TranslateCaptureToJobs() error with capture timestamp: %v", err)
+					}
+				}
+			}
+
 			if tt.isWindows {
 				containerAdministrator := "NT AUTHORITY\\SYSTEM"
 				useHostProcess := true
@@ -1736,7 +1749,15 @@ func Test_CaptureToPodTranslator_TranslateCaptureToJobs(t *testing.T) {
 				job.Spec.Template.Spec.Containers[0].Command = []string{captureConstants.CaptureContainerEntrypointWin}
 			}
 
-			cmpOption := cmpopts.SortSlices(func(enVar1, enVar2 corev1.EnvVar) bool { return enVar1.Name < enVar2.Name })
+			cmpOption := cmp.Options{
+				cmpopts.SortSlices(func(enVar1, enVar2 corev1.EnvVar) bool { return enVar1.Name < enVar2.Name }),
+				cmp.Comparer(func(x, y corev1.EnvVar) bool {
+					if isIgnorableEnvVar(x) || isIgnorableEnvVar(y) {
+						return true
+					}
+					return x.Name == y.Name && x.Value == y.Value
+				}),
+			}
 
 			if diff := cmp.Diff([]*batchv1.Job{job}, jobs, cmpOption); diff != "" {
 				t.Errorf("TranslateCaptureToJobs() mismatch (-want, +got):\n%s", diff)