Deck of cards implementation

This library implements a deck of cards with the ace as high (valued greater than King). The Ace class can be instantiated as low or high. The PokerDeckBuilder creates a deck with the ace as high.

Project Layout

• libraries lib
• source code src/main/java
• unit tests src/main/test

Design

My hope was to make the library extensible to allow other types of decks to easily be created. For example if the ace needs to be low, a different PokerDeckBuilder function could be added to support that.

I decided not to unit test the randomness of shuffle but instead that it swaps cards as expected. For better testability, the StandardDeck class takes a NumberGenerator to allow shuffle's functionality to be predictable.

The shuffle and dealOneCard methods are implemented in StandardDeck.

To Use

I used Intellij IDE to develop the project and was able to include it in another project by adding it as a module.