    @Test
    public void beat() {

        // Act
        final ReturnT<String> retval = executorBiz.beat();

        // Assert result
        Assert.assertNotNull(retval);
        Assert.assertNull(((ReturnT<String>) retval).getContent());
        Assert.assertEquals(200, retval.getCode());
        Assert.assertNull(retval.getMsg());
    }