def test_flip_twice_doesnt_change_surface_area(self, *points):
points = list(points)
poly = Polygon(points.copy())
poly.flip()
poly.flip()
self.assertEqual(poly.area(), poly.area())
def test_area():
points = [(0, 0), (2, 0), (2, 2), (0, 2)]
polygon = Polygon(points)
with pytest.raises(NotImplementedError) as e:
polygon.area()
assert str(e.value) == 'Method area should be defined in the child class.'
def test_clockwise_square(self):
square = Polygon(vertex_positions=[
(1.0, -1.0),
(1.0, 1.0),
(-1.0, 1.0),
(-1.0, -1.0),
][::-1])
origin = (0.0, 0.0)
self.assertEqual(square.winding_number(origin), -1)
self.assertEqual(square.area(), -4.0)
def test_double_square(self):
square = Polygon(vertex_positions=[
(1.0, -1.0),
(1.0, 1.0),
(-1.0, 1.0),
(-1.0, -1.0),
] * 2)
origin = (0.0, 0.0)
self.assertEqual(square.winding_number(origin), 2)
self.assertEqual(square.area(), 8.0)
def test_simple_square(self):
square = Polygon(vertex_positions=[
(1.0, -1.0),
(1.0, 1.0),
(-1.0, 1.0),
(-1.0, -1.0),
])
origin = (0.0, 0.0)
self.assertEqual(square.winding_number(origin), 1)
self.assertEqual(square.area(), 4.0)
def test_clockwise_square(self):
square = Polygon(
vertex_positions=[
(1.0, -1.0),
(1.0, 1.0),
(-1.0, 1.0),
(-1.0, -1.0),
][::-1]
)
origin = (0.0, 0.0)
self.assertEqual(square.winding_number(origin), -1)
self.assertEqual(square.area(), -4.0)
def test_double_square(self):
square = Polygon(
vertex_positions=[
(1.0, -1.0),
(1.0, 1.0),
(-1.0, 1.0),
(-1.0, -1.0),
] * 2
)
origin = (0.0, 0.0)
self.assertEqual(square.winding_number(origin), 2)
self.assertEqual(square.area(), 8.0)
def test_simple_square(self):
square = Polygon(
vertex_positions=[
(1.0, -1.0),
(1.0, 1.0),
(-1.0, 1.0),
(-1.0, -1.0),
]
)
origin = (0.0, 0.0)
self.assertEqual(square.winding_number(origin), 1)
self.assertEqual(square.area(), 4.0)
def test_numpy_compatibility(self):
square = Polygon(vertex_positions=numpy.array(
[
[1.0, -1.0],
[1.0, 1.0],
[-1.0, 1.0],
[-1.0, -1.0],
],
dtype=numpy.float64,
))
origin = numpy.array([0.0, 0.0], dtype=numpy.float64)
self.assertEqual(square.winding_number(origin), 1)
self.assertEqual(square.area(), 4.0)
def test_numpy_compatibility(self):
square = Polygon(
vertex_positions=numpy.array(
[
[1.0, -1.0],
[1.0, 1.0],
[-1.0, 1.0],
[-1.0, -1.0],
],
dtype=numpy.float64,
)
)
origin = numpy.array([0.0, 0.0], dtype=numpy.float64)
self.assertEqual(square.winding_number(origin), 1)
self.assertEqual(square.area(), 4.0)
def test_right_angle_triangle_area_correct(self):
points = [[1, 1], [3, 3], [3, 1]]
expected_area = 2
poly = Polygon(points)
self.assertEqual(expected_area, poly.area())
def test_rectangle_area_correct(self):
points = [[0, 0], [0, 3], [1, 3], [1, 0]]
expected_area = 3
poly = Polygon(points)
self.assertEqual(expected_area, poly.area())
def test_square_area_correct(self):
points = [[0, 0], [0, 1], [1, 1], [1, 0]]
expected_area = 1
poly = Polygon(points)
self.assertEqual(expected_area, poly.area())