    public void testInvalidGroupId(final String groupId, final boolean mustFail) {
        adminPage();
        findElementByLink("Configure Users, Groups and On-Call Roles").click();
        findElementByLink("Configure Groups").click();
        findElementByLink("Add new group").click();

        enterText(By.id("groupName"), groupId);
        enterText(By.id("groupComment"), "SmokeTestComment");
        findElementByXpath("//button[@type='submit' and text()='OK']").click();

        if (mustFail) {
            try {
                final Alert alert = wait.withTimeout(Duration.of(5, ChronoUnit.SECONDS)).until(ExpectedConditions.alertIsPresent());
                alert.dismiss();
            } catch (final Exception e) {
                LOG.debug("Got an exception waiting for a 'invalid group ID' alert.", e);
                throw e;
            }
        } else {
            wait.until(ExpectedConditions.elementToBeClickable(By.name("finish")));
        }
    }
The web application does not, or can not, sufficiently verify whether a well-formed, valid, consistent request was intentionally provided by the user who submitted the request.