I have tried following options.
BigDecimal expectedAmount = BigDecimal.valueOf(3000.00);
and
BigDecimal expectedAmount = BigDecimal.valueOf(3000);
and
BigDecimal expectedAmount = new BigDecimal(3000.00);
and
BigDecimal expectedAmount = new BigDecimal(3000);
All of them storing 3000.0 but I wants to store 3000.00 for my junit test. Not sure how to do it.