"""Tests for tools/make_icon.py (launcher icon generator)."""

from __future__ import annotations

import make_icon
from PIL import Image


def rgba(img: Image.Image, xy: tuple[int, int]) -> tuple[int, ...]:
    """One RGBA pixel as a tuple (Pillow's getpixel returns a wider union type)."""
    value = img.getpixel(xy)
    assert isinstance(value, tuple)
    return value


def test_icon_size_transparency_and_colours() -> None:
    img = make_icon.draw_icon(60)
    assert img.size == (60, 60)
    assert img.mode == "RGBA"
    # Corners are outside the disc, so fully transparent.
    assert rgba(img, (0, 0))[3] == 0
    # The disc edge is teal, the lock body in the middle is white.
    r, g, b, a = rgba(img, (30, 4))
    assert a > 200 and g > r and b > r
    assert rgba(img, (22, 40))[:3] == (255, 255, 255)