test: add test to detect OwnerRefInvalidNamespace event (#465)

test/e2e/framework/assertions.go

@@ -194,6 +194,7 @@ func (f *Framework) GetResourceWithRetry(t *testing.T, name, namespace string, o
 }
 
 func assertSamples(t *testing.T, metrics []byte, expected map[string]float64) {
+	t.Helper()
 	sDecoder := expfmt.SampleDecoder{
 		Dec: expfmt.NewDecoder(bytes.NewReader(metrics), expfmt.NewFormat(expfmt.FormatType(expfmt.TypeTextPlain))),
 	}
@@ -273,6 +274,7 @@ func (f *Framework) GetOperatorMetrics(t *testing.T) []byte {
 
 // AssertNoReconcileErrors asserts that there are no reconcilation errors
 func (f *Framework) AssertNoReconcileErrors(t *testing.T) {
+	t.Helper()
 	metrics := f.GetOperatorMetrics(t)
 	assertSamples(t, metrics,
 		map[string]float64{
@@ -281,6 +283,25 @@ func (f *Framework) AssertNoReconcileErrors(t *testing.T) {
 		})
 }
 
+func (f *Framework) AssertNoEventWithReason(t *testing.T, reason string) {
+	t.Helper()
+
+	evts, err := f.kubernetes.EventsV1().Events("").List(context.Background(), metav1.ListOptions{
+		FieldSelector: fmt.Sprintf("reason=%s", reason),
+	})
+	if err != nil {
+		t.Fatalf("unexpected error: %s", err)
+	}
+
+	if len(evts.Items) > 0 {
+		t.Logf("expected 0 event with reason=%q, got %d", reason, len(evts.Items))
+		for i, e := range evts.Items {
+			t.Logf("event[%d]: %s", i, e.String())
+		}
+		t.FailNow()
+	}
+}
+
 func (f *Framework) GetStackWhenAvailable(t *testing.T, name, namespace string) v1alpha1.MonitoringStack {
 	var ms v1alpha1.MonitoringStack
 	key := types.NamespacedName{

test/e2e/main_test.go

@@ -51,14 +51,27 @@ func main(m *testing.M) int {
 
 	exitCode := m.Run()
 
-	tests := []testing.InternalTest{{
-		Name: "NoReconcilationErrors",
-		F: func(t *testing.T) {
-			// see: https://github.com/rhobs/observability-operator/issues/200
-			t.Skip("skipping reconciliation error test until #200 is fixed")
-			f.AssertNoReconcileErrors(t)
+	tests := []testing.InternalTest{
+		{
+			Name: "NoReconcilationErrors",
+			F: func(t *testing.T) {
+				// see: https://github.com/rhobs/observability-operator/issues/200
+				t.Skip("skipping reconciliation error test until #200 is fixed")
+				f.AssertNoReconcileErrors(t)
+			},
 		},
-	}}
+		{
+			// Kubernetes will emit events with reason=OwnerRefInvalidNamespace
+			// if the operator defines invalid owner references.
+			// See:
+			// - https://kubernetes.io/docs/concepts/architecture/garbage-collection/#owners-dependents
+			// - https://issues.redhat.com/browse/COO-117
+			Name: "NoOwnerRefInvalidNamespaceReasonEvent",
+			F: func(t *testing.T) {
+				f.AssertNoEventWithReason(t, "OwnerRefInvalidNamespace")
+			},
+		},
+	}
 
 	log.Println("=== Running post e2e test validations ===")
 	if !testing.RunTests(func(_, _ string) (bool, error) { return true, nil }, tests) {