e2e: allow kubectlDelete to succeed with NotFound error

Signed-off-by: Niels de Vos <ndevos@redhat.com>

e2e/errors.go

@@ -127,3 +127,33 @@ func isAlreadyExistsCLIError(err error) bool {
 
 	return true
 }
+
+// isNotFoundCLIError checks for "is not found" error from kubectl CLI.
+func isNotFoundCLIError(err error) bool {
+	if err == nil {
+		return false
+	}
+	// if multiple resources already exists. each error is separated by newline
+	stdErr := getStdErr(err.Error())
+	if stdErr == "" {
+		return false
+	}
+
+	stdErrs := strings.Split(stdErr, "\n")
+	for _, s := range stdErrs {
+		// If the string is just a new line continue
+		if strings.TrimSuffix(s, "\n") == "" {
+			continue
+		}
+		// Ignore warnings
+		if strings.Contains(s, "Warning") {
+			continue
+		}
+		// Resource not found error message
+		if !strings.Contains(s, "Error from server (NotFound)") {
+			return false
+		}
+	}
+
+	return true
+}