python-checkers/test.py at main · hannah7webb/python-checkers · GitHub

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"""
Author: Hannah Webb
Creation Date: 12/10/25
Purpose: Test cases for checkers.
"""
from checkers import Board
from checkers import Game

def test_is_valid_position(): # tests for is_valid_position()
    fn_name = 'is_valid_position'
    game = Game()
    game.board = Board(8)
    game.board.size = 8

    expected = True
    result = game.is_valid_position("a1", 8)
    error_message = f'while testing {fn_name}, expected {expected} got {result}'
    assert expected == result, error_message

    expected = False
    result = game.is_valid_position("i1", 8)
    error_message = f'while testing {fn_name}, expected {expected} got {result}'
    assert expected == result, error_message

    print(f'{fn_name} tests passed')

def test_get_piece_at_name(): # tests for get_piece_at_name()
    fn_name = 'get_piece_at_name'
    board = Board(8)
    board_str = board.create()
    game = Game()
    game.board = board

    expected = 'b'
    result = game.get_piece_at_name("a1", board_str)
    error_message = f'while testing {fn_name}, expected {expected} got {result}'
    assert expected == result, error_message

    expected = '-'
    result = game.get_piece_at_name("b1", board_str)
    error_message = f'while testing {fn_name}, expected {expected} got {result}'
    assert expected == result, error_message

    print(f'{fn_name} tests passed')

def test_get_moves(): # tests for get_moves()
    fn_name = 'get_moves'
    board = Board(4)
    board_str = board.create()
    game = Game()
    game.board = board

    expected = "d2 b2 "
    result = game.get_moves("c1", board_str)
    error_message = f'while testing {fn_name}, expected "{expected}" got "{result}"'
    assert expected == result, error_message

    expected = "c3 "
    result = game.get_moves("d4", board_str)
    error_message = f'while testing {fn_name}, expected "{expected}" got "{result}"'
    assert expected == result, error_message

    print(f'{fn_name} tests passed')

def test_king(): # tests for king()
    fn_name = 'king'
    board = Board(4)
    board_str = board.create()
    game = Game()
    game.board = board

    # creates a board where we've inserted a b into the last row
    pos = game.get_pos_at_name('b4', board_str)
    board_str = board_str[:pos] + 'b' + board_str[pos + 1:]
    # checks to ensure that this b is kinged when we run king()
    expected = board_str[:pos] + 'B' + board_str[pos + 1:]
    result = game.king(board_str)
    error_message = f'while testing {fn_name}, expected "{expected}" got "{result}"'
    assert expected == result, error_message

    # creates a fresh board
    board_str = board.create()

    # creates a board where we've inserted a r into the first row
    pos = game.get_pos_at_name('c1', board_str)
    board_str = board_str[:pos] + 'r' + board_str[pos + 1:]
    # checks to ensure that this r is kinged when we run king()
    expected = board_str[:pos] + 'R' + board_str[pos + 1:]
    result = game.king(board_str)
    error_message = f'while testing {fn_name}, expected "{expected}" got "{result}"'
    assert expected == result, error_message

    print(f'{fn_name} tests passed')

def test_all(): # runs all tests
    test_is_valid_position()
    test_get_piece_at_name()
    test_get_moves()
    test_king()
    print("All tests passed!")

if __name__ == "__main__":
    test_all()