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Python Python Testing First Steps With Testing Writing and Running Doctests

benjamin siverly
benjamin siverly
3,430 Points

Confused with how tests work in Python - see results

I'm not exactly sure how / why this is giving me trouble - since expected and got are the same, shouldn't that be a success?

treehouse:~/workspace/dungeon$ python -m doctest dd_game.py                        
**********************************************************************             
File "/home/treehouse/workspace/dungeon/dd_game.py", line 54, in dd_game.get_moves 
Failed example:                                                                    
    get_moves((0, 2))                                                              
Expected:                                                                          
    ['RIGHT', 'UP', 'DOWN']                                                        
Got:                                                                               
    ['RIGHT', 'UP', 'DOWN']                                                        
**********************************************************************             
1 items had failures:                                                              
   1 of   2 in dd_game.get_moves                                                   
***Test Failed*** 1 failures.
Steven Parker
Steven Parker
229,920 Points

Sharing your code along with the results would be most helpful for analyzing your issue.

benjamin siverly
benjamin siverly
3,430 Points
"""dungeon game : explore a dungeon to find a hidden door and escape. Be careful, a dragon is hiding somewhere in the dark."""
import os
import random

GAME_DIMENSIONS = (5, 5)
player = {'location': None, 'path': []}


def clear():
    """Clear the screen"""
    os.system('cls' if os.name == 'nt' else 'clear')


def build_cells(width, height):
    """create and return width by height grid of two tuples

    >>> cells = build_cells(2, 2)
    >>> len(cells)
    4

    """
    cells = []
    for y in range(height):
        for x in range(width):
            cells.append((x, y))
    return cells


def get_locations(cells):
    """ randomly pick starting locations for monster, door, player

    >>> cells = build_cells(2,2)
    >>> m, d, p = get_locations(cells)
    >>> m != d and d!= p and m != p
    True
    >>> d in cells
    True

    """
    monster = random.choice(cells)
    door = random.choice(cells)
    player = random.choice(cells)

    if monster == door or monster == player or door == player:
        monster, door, player = get_locations(cells)

    return monster, door, player


def get_moves(player):
    """based on tuple of player position, return list of acceptable moves.

    >>> GAME_DIMENSIONS = (2, 2)
    >>> get_moves((0, 2))
    ['RIGHT', 'UP', 'DOWN'] 

    """
    x, y = player
    moves = ['LEFT', 'RIGHT', 'UP', 'DOWN']
    if x == 0:
        moves.remove('LEFT')
    if x == GAME_DIMENSIONS[0] - 1:
        moves.remove('RIGHT')
    if y == 0:
        moves.remove('UP')
    if y == GAME_DIMENSIONS[1] - 1:
        moves.remove('DOWN')
    return moves


def move_player(player, move):
    x, y = player['location']
    player['path'].append((x, y))
    if move == 'LEFT':
        x -= 1
    elif move == 'UP':
        y -= 1
    elif move == 'RIGHT':
        x += 1
    elif move == 'DOWN':
        y += 1
    return x, y


def draw_map():
    print(' _'*GAME_DIMENSIONS[0])
    row_end = GAME_DIMENSIONS[0]
    tile = '|{}'
    for index, cell in enumerate(cells):
        if index % row_end < row_end - 1:
            if cell == player['location']:
                print(tile.format('X'), end='')
            elif cell in player['path']:
                print(tile.format('.'), end='')
            else:
                print(tile.format('_'), end='')
        else:
            if cell == player['location']:
                print(tile.format('X|'))
            elif cell in player['path']:
                print(tile.format('.|'))
            else:
                print(tile.format('_|'))

def play():
    cells = build_cells(*GAME_DIMENSIONS)
    monster, door, player['location'] = get_locations(cells)

    while True:
        clear()

        print("WELCOME TO THE DUNGEON!")
        moves = get_moves(player['location'])

        draw_map(cells)

        print("\nYou're currently in room {}".format(player['location']))
        print("\nYou can move {}".format(', '.join(moves)))
        print("Enter QUIT to quit")

        move = input("> ")
        move = move.upper()

        if move in ['QUIT', 'Q']:
            break

        if move not in moves:
            print("\n** Walls are hard! Stop running into them! **\n")
            continue

        player['location'] = move_player(player, move)

        if player['location'] == door:
            print("\n** You escaped! **\n")
            break
        elif player['location'] == monster:
            print("\n** You got eaten! **\n")
            break

if __name__ == '__main__':
    play()

3 Answers

Steven Parker
Steven Parker
229,920 Points

:point_right: There's a space after the closing bracket on line 55.

Apparently extra white space on the line throws off the comparison.

Chris Freeman
MOD
Chris Freeman
Treehouse Moderator 68,423 Points

Beyond getting the tests to pass there is a syntax error:

WELCOME TO THE DUNGEON!
Traceback (most recent call last):
  File "<string>", line 141, in <module>
  File "<string>", line 115, in play
TypeError: draw_map() takes 0 positional arguments but 1 was given

? Fix by adding parameter:

def draw_map(cells):

Nice catch Chris :)

benjamin siverly
benjamin siverly
3,430 Points

Way to go! That was very helpful!

benjamin siverly
benjamin siverly
3,430 Points

Figured it out! A space after the expected outcome threw it off but when I removed all whitespace it ran fine.

Good to know for the future though :)

Thanks!