test_project.py

from project import calculate_new_head_position, generate_new_food_position, update_game
import pytest


from unittest.mock import patch

def test_update_game():
    # Arrange
    with patch('module_where_function_is.calculate_new_head_position', return_value=(10, 10)):
        global food_position
        food_position = (10, 10)
        # Act
        update_game()
        # Assert
        # Check that a new food position was generated
        assert food_position != (10, 10)

def test_generate_new_food_position():
    # Act
    position = generate_new_food_position()
    # Assert
    # Check that a tuple was returned
    assert isinstance(position, tuple)
    # Check that the tuple has two elements
    assert len(position) == 2
    # Check that the elements are within the expected range
    assert 0 <= position[0] < 40
    assert 0 <= position[1] < 30


def test_calculate_new_head_position():
    # Arrange
    global direction
    direction = 'up'
    global snake
    snake = [(10, 10)]
    # Act
    position = calculate_new_head_position()
    # Assert
    # Check that the y-coordinate decreased by 1
    assert position == (10, 9)