} catch (Exception e) {
            fail("send() should not throw an exception: " + e.getMessage());
        }
    }

    @Test
    public void test_toSlackMessage_withOnlySubject() {
        MockSMailPostingDiscloser discloser = new MockSMailPostingDiscloser();
        discloser.setSubject("Only Subject");
        discloser.setPlainText(null);