@Test
public void testBadComment() throws B2JsonException {

    String json =
            "{ / \n" +
            "  \"a\": 41,\n" +
            "  \"b\": \"hello\"\n" +
            "}";
    thrown.expect(B2JsonException.class);
    thrown.expectMessage("invalid comment: single slash");
    b2Json.fromJson(json, Container.class);
}