tests/test_render.py

import numpy as np

from life_game.arcade import HELPER_ITEMS_KEY, NEGATIVE_ITEMS_KEY, NEGATIVE_STRUCTURES_KEY
from life_game.game import GameModel
from life_game.render import (
    BOSS_COLOR,
    BULLET_COLOR,
    ENEMY_COLOR,
    HELPER_ITEM_COLOR,
    NEGATIVE_ITEM_COLOR,
    NEGATIVE_STRUCTURE_COLOR,
    PLAYER_COLOR,
    TOWER_COLOR,
    cell_size_for,
    render_board,
)
from life_game.rules import RULES


def test_render_board_draws_semantic_overlay_glyphs():
    grid = np.zeros((8, 8), dtype=np.uint8)
    enemies = np.zeros_like(grid, dtype=bool)
    boss = np.zeros_like(grid, dtype=bool)
    enemies[1, 1] = True
    boss[1, 5] = True
    game = GameModel(
        enemies=enemies,
        boss=boss,
        player=(2, 2),
        bullets=((3, 3),),
        towers=((4, 4),),
        data={
            HELPER_ITEMS_KEY: ((5, 5),),
            NEGATIVE_ITEMS_KEY: ((5, 1),),
            NEGATIVE_STRUCTURES_KEY: ((6, 6),),
        },
    )

    image = render_board(grid, RULES["conway"], game)

    cell_size = cell_size_for(grid)
    assert image.dtype == np.uint8
    assert image.shape == (grid.shape[0] * cell_size, grid.shape[1] * cell_size, 3)
    assert _cell_has_color(image, 1, 1, ENEMY_COLOR, cell_size)
    assert _cell_has_color(image, 1, 5, BOSS_COLOR, cell_size)
    assert _cell_has_color(image, 2, 2, PLAYER_COLOR, cell_size)
    assert _cell_has_color(image, 3, 3, BULLET_COLOR, cell_size)
    assert _cell_has_color(image, 4, 4, TOWER_COLOR, cell_size)
    assert _cell_has_color(image, 5, 5, HELPER_ITEM_COLOR, cell_size)
    assert _cell_has_color(image, 5, 1, NEGATIVE_ITEM_COLOR, cell_size)
    assert _cell_has_color(image, 6, 6, NEGATIVE_STRUCTURE_COLOR, cell_size)


def _cell_has_color(image: np.ndarray, row: int, col: int, color: np.ndarray, cell_size: int) -> bool:
    region = image[row * cell_size : (row + 1) * cell_size, col * cell_size : (col + 1) * cell_size]
    return bool(np.any(np.all(region == color, axis=2)))