add more test cases

more testing coverage of the auto pruning functionality

references operator-framework#101

prune/prunables.go

@@ -51,7 +51,7 @@ func DefaultPodIsPruneable(obj client.Object) error {
 
 	// If the pod has Succeeded then we can remove it
 	if pod.Status.Phase != corev1.PodSucceeded {
-		return fmt.Errorf("can not prune Pod as it has not finished running")
+		return fmt.Errorf("can not prune Pod as it has not succeeded")
 	}
 
 	return nil
@@ -91,13 +91,13 @@ func ConvertClientObjectToKind(object client.Object, kind interface{}) error {
 	unstructuredObject, err := runtime.DefaultUnstructuredConverter.ToUnstructured(object)
 
 	if err != nil {
-		return err
+		return fmt.Errorf("failed to convert object to Unstructured -- %s", err)
 	}
 
 	err = runtime.DefaultUnstructuredConverter.FromUnstructured(unstructuredObject, kind)
 
 	if err != nil {
-		return err
+		return fmt.Errorf("failed to convert object to kind -- %s", err)
 	}
 
 	return nil