Banking Kata using object calisthenics

Banking kata object calisthenics

Banking kata

Object Calisthenics rules

1. One level of indentation per method
2. Don’t use the ELSE keyword
3. Wrap all primitives and Strings
4. First class collections
5. One dot per line
6. Don’t abbreviate
7. Keep all entities small (50 lines)
8. No classes with more than two instance variables
9. No getters/setters/properties

Kata summary

Given a client makes a deposit of 1000€ on 10-01-2012
  And a deposit of 2000€ on 13-01-2012
  And a withdrawal of 500€ on 14-01-2012
When she prints her bank statement
Then she would see
Date       || Credit    || Debit  || Balance
14/01/2012 ||           || 500.00 || 2500.00
13/01/2012 || 2000.00   ||        || 3000.00
10/01/2012 || 1000.00   ||        || 1000.00