OOP Kata

A code kata is an exercise that will help you to train a very specific skill. This one will help you train your Object-Oriented approach. Feel free to over-engineer solution. Below you will find general information about the project that you will work on.

Warm up

You can jump straight to the code, or you might look at the article explaining the approach.

Initial project

Code on main branch simulates some washing machine. There are a few requirements, that it needs to fulfil.

Must provide dedicated programs for a different type of fabric; supported ones are wool, cotton and silk
Programs for fabrics must be adjustable in the matter of temperature and spin speed
- Wool can be washed only in temperature up to 40°C, with spin speed between 100 and 400 rounds per minute
- Cotton can be washed in temperature between 30 and 95°C, with spin speed up to 1200 RPM
- The maximum temperature for silk is 30°C and up to 300 RPM
The washer should have protection for putting over 7 kilograms of laundries
The default value for temperature and spin speed will be its maximum value

Sample solution

You can find a sample solution on sample-solution branch. If you need guidance on start, you can follow these steps:

make a class for each type of Laundry Elements and remove enum
do not use setters for an update of laundry dirty flag, make dedicated, explicit methods that will mark laundry as dirty or clean
create a class that will group Laundry Elements into Laundry object. Use this object in communication between classes
create a Basket class that will handle the logic of sorting laundry by its type
create a class for Program that will store spin speed and temperature
rename Washing Machine methods so they will reflect real-world operations that you perform on it
try to remove all direct passing of List as method parameter - List should be only used internally inside of a class
extend Programme class so it will contain behaviours to adjust parameters
temperature can be changed only every 5 degrees
the spin speed can be changed only every 100
the programme can be set up to perform an additional rinse
create dedicated classes for temperature and spin speed
move check if the value is in a valid range to Temperature and SpinSpeed classes
laundry, that does not fit into Washing Machine should be put back into Basket
try to remove Service class or name it properly - naming class with 'Service' suffix promotes adding all, barely connected code into this class instead of splitting responsibilities

License

ytyubox/oop-kata-swift

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