def test_rotate2d_rotation_arg(self):
angle = 'a'
v = (1, 0)
with self.assertRaises(
TypeError,
msg='should raise TypeError when not passing numeric angle'):
rotate2d(angle, v)
def test_rotate2d_vector_arg_dimension(self):
angle = pi
v = (1, 0, 0)
with self.assertRaises(
TypeError,
msg='should raise TypeError when not passing 2D vector'):
rotate2d(angle, v)
def test_rotate2d_vector_arg_numeric(self):
angle = pi
v = ('a', 'b')
with self.assertRaises(
TypeError,
msg='should raise TypeError when not passing numeric 2D vector'
):
rotate2d(angle, v)
def transformed(self):
# before rotation was:
# return [add((self.x, self.y), v) for v in self.points]
rotated_points = [
rotate2d(self.rotation_angle, point) for point in self.points
]
return [
add((self.x, self.y), rotated_point)
for rotated_point in rotated_points
]
def test_rotate2d_happy_path(self):
angle = pi / 2
v = (2, 2)
actual_rotate2d_result = rotate2d(angle, v)
expected_rotate2d_result = (-2, 2)
self.assertAlmostEqual(actual_rotate2d_result[0],
expected_rotate2d_result[0],
msg='rotate2d x should approximately match')
self.assertAlmostEqual(actual_rotate2d_result[1],
expected_rotate2d_result[1],
msg='rotate2d y should approximately match')