SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSS'Z'");
        BasicBSONObject a = new BasicBSONObject("ts", sdf.parse("2014-01-03T13:16:03.359Z"));
        BasicBSONObject b = new BasicBSONObject("ts", sdf.parse("2014-01-03T13:16:03.359Z"));
        assertTrue(a.equals(b));
        assertTrue(a.hashCode() == b.hashCode());

        a = new BasicBSONObject("firstName", Pattern.compile("^asdf"));
        b = new BasicBSONObject("firstName", Pattern.compile("^asdf"));
        assertTrue(a.equals(b));
        assertTrue(a.hashCode() == b.hashCode());