def test_slope() -> None:
"""
Tests if slope function works correctly.
"""
point_1 = Point(x=3, y=4)
point_2 = Point(x=0, y=0)
assert point_1.slope(point_1) == float('inf')
assert point_1.slope(point_2) == 4 / 3
assert point_2.slope(point_1) == 4 / 3
def _sort_key(_point: Point) -> Tuple[float, float, float]:
"""
HELPER. Defines sorting order of points.
Args:
_point: Point object.
Returns:
Tuple consisting of comparison oreder priority (slope, -y, x)
"""
return _point.slope(start), -_point.y, _point.x
