old_contents: import unittest
  from math import pi
  
  from spiralgalaxygame.geometry import Vector
  
  
  class VectorTests (unittest.TestCase):
      def test_tupleness(self):
          v = Vector(2.0, 3.0)
          self.assertIsInstance(v, tuple)
          (x, y) = v
  
          self.assertEqual(x, 2.0)
          self.assertEqual(y, 3.0)
          self.assertEqual(v[0], 2.0)
          self.assertEqual(v[1], 3.0)
  
      def test_radial_constructor(self):
          v = Vector.from_angle_and_radius(0.25 * pi, 2 ** 0.5)
          (x, y) = v
  
          self.assertAlmostEqual(x, 1)
          self.assertAlmostEqual(y, 1)
  
      def test_cartesian_properties(self):
          v = Vector(2.0, 3.0)
          (x, y) = v
  
          self.assertEqual(x, v.x)
          self.assertEqual(y, v.y)
  
      def test_radial_properties(self):
          for i in range(8):
              a = pi * (i-3) / 4
              r = 1.0
  
              v = Vector.from_angle_and_radius(a, r)
  
              self.assertAlmostEqual(a, v.angle)
              self.assertAlmostEqual(r, v.magnitude)
  
      def test_angle_edge_cases(self):
          self.assertAlmostEqual(pi/2, Vector(0.0,1.0).angle)
          self.assertAlmostEqual(-pi/2, Vector(0.0,-1.0).angle)
  
new_contents: import unittest
  from math import pi
  
  from spiralgalaxygame.geometry import Vector
  
  
  class VectorTests (unittest.TestCase):
      def test_tupleness(self):
          v = Vector(2.0, 3.0)
          self.assertIsInstance(v, tuple)
          (x, y) = v
  
          self.assertEqual(x, 2.0)
          self.assertEqual(y, 3.0)
          self.assertEqual(v[0], 2.0)
          self.assertEqual(v[1], 3.0)
  
      def test_radial_constructor(self):
          v = Vector.from_angle_and_radius(0.25 * pi, 2 ** 0.5)
          (x, y) = v
  
          self.assertAlmostEqual(x, 1)
          self.assertAlmostEqual(y, 1)
  
      def test_cartesian_properties(self):
          v = Vector(2.0, 3.0)
          (x, y) = v
  
          self.assertEqual(x, v.x)
          self.assertEqual(y, v.y)
  
      def test_radial_properties(self):
          for i in range(8):
              a = pi * (i-3) / 4
              r = 1.0
  
              v = Vector.from_angle_and_radius(a, r)
  
              self.assertAlmostEqual(a, v.angle)
              self.assertAlmostEqual(r, v.magnitude)
  
      def test_angle_edge_cases(self):
          self.assertAlmostEqual(pi/2, Vector(0.0,1.0).angle)
          self.assertAlmostEqual(-pi/2, Vector(0.0,-1.0).angle)
  
      def test_repr(self):
          self.assertEqual('<2.0, 3.0>', repr(Vector(2.0, 3.0)))
  
  
subject: Add a test for Vector.__repr__.