@Test
public void testMissingComma() throws B2JsonException {

    String json =
            "{\n" +
            "  \"a\": 41\n" +
            "  \"b\": \"hello\"\n" +
            "}";
    thrown.expect(B2JsonException.class);
    thrown.expectMessage("object should end with brace but found: \"");
    b2Json.fromJson(json, Container.class);
}