sendToSlack(cardView, discloser);
        sendToGoogleChat(cardView, discloser);
    }

    /**
     * Sends a notification to Slack.
     *
     * @param cardView the card view for the notification
     * @param discloser the mail posting discloser
     */
    protected void sendToSlack(final CardView cardView, final SMailPostingDiscloser discloser) {

        MockSMailPostingDiscloser discloser = new MockSMailPostingDiscloser();

        // Should return early without doing anything
        try {
            notificationHelper.sendToSlack(null, discloser);
        } catch (Exception e) {
            fail("sendToSlack() should not throw an exception with blank URLs: " + e.getMessage());
        }
    }

    @Test
    public void test_sendToSlack_withNullWebhookUrls() {