Renamed test file for the book Programming in Scala.
Added test file FuncProgInScalaCh01 for the chapter 1 of the book Functional Programming In Scala.
Added a trivial test for test class FuncProgInScalaCh01.
Wrote intention code for Assert part of test 'a simple scala program'.
Created and implemented class MyAbs.
Created and implemented method MyAbs.abs().
Refactored to object version.
Added test 'a simple scala program of ABS - class version p15' and made it to pass.
Added Assert part of test 'the result of function buyCoffee() of class Cafe should be a Coffee with side effects p4'.
Fixed Error: Created class Coffee.
Fixed Error: Created class CreditCard.
Fixed Error: Created class Cafe.
Fixed Error: Created method Cafe.buyCoffee().
Added intention code in method Cafe.buyCoffee() according to the book.
Fixed Error: Created method CreditCard.charge().
Fixed Error: Added getter Coffee.price.
Updated the test name.
Updated the Assert part of the test to check if the coffee costs 18 dollors.
Wrote intention code to ask method Cafe.buyCoffee() return a pair of a Coffee and a Charge.
Fixed Error: Created class Charge.