Unit test for uno.playCard

[logan-hendricks]

uno.go has a method by the name of playCard. This particular method does not have any unit tests created for it.

Write a unit test that sets up the data in the database for an entire game.

1. Create the game
2. Add a player to the game
3. Start the game.

Grab one card from the player's hand, and submit it to playCard
Confirm that on calling playCard the player's hand is now missing that card.
Confirm the card is in the top of the discard pile in the game