@Test(expectedExceptions = IllegalArgumentException.class)
    public void testDotKeysArrayFail() {
        DBCollection collection = _db.getCollection("testdotkeysFail");

        DBObject obj = new BasicDBObject("x", 1)
                .append("y", 2)
                .append("array", new Object[]{new BasicDBObject("foo.bar", "baz")});
        collection.insert(obj);
    }

    @Test(expectedExceptions = IllegalArgumentException.class)
    public void testDotKeysArrayFail3() {
        DBCollection collection = _db.getCollection("testdotkeysFail");

        final Map<String, Object> map = new HashMap<String, Object>(1);
        map.put("foo.bar",2);
        DBObject obj = new BasicDBObject("x", 1)
                .append("y", 2)
                .append("array", new Object[]{map});
        collection.insert(obj);
    }