    @Test
    public void getBeanNames() {

        Set<String> set = converter.toSet(BeanFactory.getBeanNames());
        Assert.assertTrue(set.contains("tephra.util.converter"));
        Assert.assertTrue(set.contains("tephra.bean.singleton"));
        Assert.assertTrue(set.contains("tephra.bean.prototype"));
        Assert.assertTrue(set.contains("tephra.bean.context-refresh-listener.1"));
        Assert.assertTrue(set.contains("tephra.bean.context-refresh-listener.2"));
    }