The Card class represents a playing card with a suit and value. The Deck class represents a deck of cards, which is essentially a list of Card objects. The Deck class has methods for shuffling the deck, dealing cards from the top of the deck, and dealing a hand of cards.
The Card class has a constructor that takes two parameters: suit and value. The suit must be one of the four possible suits defined in the class, and the value must be one of the possible values defined in the class.
The Card class also has a repr method that returns a string representation of the card in the format "value of suit".
The Deck class represents a deck of playing cards (of type Card). The Deck class has methods for counting the number of cards in the deck, shuffling the deck, dealing a single card from the top of the deck, and dealing a hand of cards.
The Deck class has a constructor that creates a list of 52 Card objects, one for each possible combination of suit and value.
The Deck class also has a repr method that returns a string representation of the deck in the format "Deck of cards".
The Deck class has a count method that returns the number of cards in the deck. If there are no cards left in the deck, it returns 0.
The shuffle method shuffles the deck of cards using the shuffle function from the random module.
The _deal method is a private method that deals cards from the deck. It takes an optional parameter for the number of cards to deal and returns a list of Card objects. If the number of cards to deal is not specified, it defaults to 1. If there are not enough cards in the deck to deal, it raises a ValueError.
The deal_card method is a public method that deals a single card from the top of the deck and returns the card that was dealt. If there are no cards left in the deck, it raises a ValueError.
The deal_hand method is a public method that deals a hand of cards with the specified number of cards and returns a list of Card objects. If there are not enough cards in the deck to deal, it raises a ValueError.
There are also two test classes, CardTestCase and DeckTestCase, that use the unittest module to test the functionality of the Card and Deck classes.
The CardTestCase class tests whether a valid card can be created by passing valid suit and value parameters to the Card class constructor, whether a ValueError is raised when an invalid suit parameter is passed to the Card class constructor, whether a ValueError is raised when an invalid value parameter is passed to the Card class constructor, and whether the repr method of the Card class returns the expected string representation of a card.
The DeckTestCase class tests whether a new deck is created with 52 cards, whether the count method returns the correct number of cards in the deck, whether a ValueError is raised when there are no cards left in the deck and the deal_card method is called, whether a ValueError is raised when there are not enough cards left in the deck and the deal_hand method is called, whether the shuffle method shuffles the deck of cards, and whether the repr method of the Deck class returns the expected string representation of the deck.