from lintunes.gui import drag_ghost


class TestDragIcon:
    """The cursor-following drag indicator is loaded from a customizable PNG
    that ships next to the application icon (packaging/lintunes.png)."""

    def test_default_png_ships_next_to_app_icon(self):
        assert drag_ghost.ICON_PATH.name == "drag-icon.png"
        assert drag_ghost.ICON_PATH.exists()
        assert (drag_ghost.ICON_PATH.parent / "lintunes.png").exists()

    def test_default_file_is_a_png(self):
        assert drag_ghost.ICON_PATH.read_bytes()[:8] == b"\x89PNG\r\n\x1a\n"