assertThat(set.contains(DummyTest.class.getName()), is(not(true)));
    }

    /**
     * @throws Exception
     */
    @Test
    public void testFromDir_FileSystem() throws Exception {
        final Traverser traverser = TraversalUtil.getTraverser("org/codelibs/core/io/xxx");
        assertThat(traverser, is(notNullValue()));