def test_line_segment_point_intersection_up_down():
"""A single point intersection"""
ls1 = LineSegment(Point(0, -4), Point(0, 4))
ls2 = LineSegment(Point(0, 2), Point(0, -2))
expected = LineSegment(Point(0, -2), Point(0, 2))
assert ls1.intersect(ls2).simplify() == expected
assert ls2.intersect(ls1).simplify() == expected
def test_line_segment_intersection_90_270():
"""A single point intersection"""
ls1 = LineSegment(Point(0, 0), Point(0, 1))
ls2 = LineSegment(Point(0, 3), Point(0, 1))
assert ls1.intersect(ls2) == Point(0, 1)
assert ls2.intersect(ls1) == Point(0, 1)
def test_line_segment_no_intersection2():
"""No intersection"""
ls1 = LineSegment(Point(0, 0), Point(0, 1))
ls2 = LineSegment(Point(0, 2), Point(0, 3))
assert ls1.intersect(ls2) is None
assert ls2.intersect(ls1) is None
def test_line_segment_no_intersection1():
"""No intersection"""
ls1 = LineSegment(Point(0, 0), Point(1, 0))
ls2 = LineSegment(Point(2, 0), Point(3, 0))
assert ls1.intersect(ls2) is None
assert ls2.intersect(ls1) is None
def test_line_segment_point_intersection_horizontal_vertical_cross():
"""A single point intersection"""
ls1 = LineSegment(Point(-4, 0), Point(4, 0))
ls2 = LineSegment(Point(0, -4), Point(0, 4))
assert ls1.intersect(ls2) == Point(0, 0)
assert ls2.intersect(ls1) == Point(0, 0)
def test_line_segment_point_intersection4():
"""A single point intersection"""
ls1 = LineSegment(Point(0, 4), Point(20, 4))
ls2 = LineSegment(Point(0, 0), Point(20, 20))
assert ls1.intersect(ls2) == Point(4, 4)
assert ls2.intersect(ls1) == Point(4, 4)
def test_line_segment_point_intersection1():
"""A single point intersection"""
ls1 = LineSegment(Point(0, 0), Point(1, 1))
ls2 = LineSegment(Point(1, 1), Point(3, 3))
assert ls1.intersect(ls2).simplify() == Point(1, 1)
assert ls2.intersect(ls1).simplify() == Point(1, 1)