"""Blank-capture guard without opening a desktop or native capture session."""

import numpy as np

from artemis.plugins.window_capture import has_picture


def test_black_or_cursor_only_frame_is_not_ready():
    frame = np.zeros((256, 256, 4), dtype=np.uint8)
    frame[:, :, 3] = 255
    assert not has_picture(frame)
    frame[0, 0, :3] = 255
    assert not has_picture(frame)


def test_dark_page_with_visible_controls_is_valid():
    frame = np.zeros((256, 256, 4), dtype=np.uint8)
    frame[40:60, 40:120, :3] = 50
    assert has_picture(frame)