pypol/tests/test_coordinates.py

   1 import math
   2 import unittest
   3
   4 from ..linexprs import Symbol
   5 from ..coordinates import *
   6
   7
   8 class TestPoint(unittest.TestCase):
   9
  10     def setUp(self):
  11         self.x = Symbol('x')
  12         self.y = Symbol('y')
  13         self.z = Symbol('z')
  14         self.pt1 = Point({self.x: 10, self.y: 5, self.z: 1})
  15         self.pt2 = Point({self.x: 15, self.y: 40, self.z: 60})
  16         self.vec1 = Vector({self.x: 20, self.y: 30, self.z: 40})
  17
  18     def test_add(self):
  19         self.assertEqual(self.pt1 + self.vec1, Point({self.x: 30, self.y: 35, self.z: 41}))
  20         with self.assertRaises(TypeError):
  21             self.pt1 + self.pt2
  22
  23     def test_eq(self):
  24         self.assertEqual(self.pt1, self.pt1)
  25         self.assertNotEqual(self.pt1, self.pt2)
  26         self.assertNotEqual(self.pt1, self.vec1)
  27
  28     def test_sub(self):
  29         self.assertEqual(self.pt1 - self.pt2, Vector({self.x: -5, self.y: -35, self.z: -59}))
  30         self.assertEqual(self.pt1 - self.vec1, Point({self.x: -10, self.y: -25, self.z: -39}))
  31
  32
  33 class TestVector(unittest.TestCase):
  34
  35     def setUp(self):
  36         self.x = Symbol('x')
  37         self.y = Symbol('y')
  38         self.z = Symbol('z')
  39         self.pt1 = Point({self.x: 10, self.y: 5, self.z: 1})
  40         self.pt2 = Point({self.x: 15, self.y: 40, self.z: 60})
  41         self.vec1 = Vector({self.x: 20, self.y: 30, self.z: 40})
  42         self.vec2 = Vector({self.x: 45, self.y: 70, self.z: 80})
  43
  44     def test_add(self):
  45         self.assertEqual(self.vec1 + self.pt1, Point({self.x: 30, self.y: 35, self.z: 41}))
  46         self.assertEqual(self.vec1 + self.vec2, Vector({self.x: 65, self.y: 100, self.z: 120}))
  47
  48     def test_angle(self):
  49         self.assertEqual(math.degrees(self.vec1.angle(self.vec1)), 0)
  50         self.assertAlmostEqual(math.degrees(self.vec1.angle(self.vec2)), 4.15129, places=5)
  51         self.assertAlmostEqual(math.degrees(self.vec2.angle(self.vec1)), 4.15129, places=5)
  52
  53     def test_cross(self):
  54         self.assertEqual(self.vec1.cross(self.vec2), Vector({self.x: -400, self.y: 200, self.z: 50}))
  55
  56     def test_div(self):
  57         self.assertEqual(self.vec1 / 10, Vector({self.x: 2, self.y: 3, self.z: 4}))
  58
  59     def test_dot(self):
  60         self.assertEqual(self.vec1.dot(self.vec2), 6200)
  61
  62     def test_eq(self):
  63         self.assertEqual(self.vec1, self.vec1)
  64         self.assertNotEqual(self.vec1, self.vec2)
  65
  66     def test_mul(self):
  67         self.assertEqual(75 * self.vec1, Vector({self.x: 1500, self.y: 2250, self.z: 3000}))
  68         self.assertEqual(self.vec1 * 75, Vector({self.x: 1500, self.y: 2250, self.z: 3000}))
  69
  70     def test_neg(self):
  71         self.assertEqual(-self.vec1, Vector({self.x: -20, self.y: -30, self.z: -40}))
  72
  73     def test_norm(self):
  74         self.assertAlmostEqual(self.vec1.norm(), 53.85165, places=5)
  75
  76     def test_norm2(self):
  77         self.assertEqual(self.vec1.norm2(), 2900)
  78
  79     def test_asunit(self):
  80         unit = self.vec1.asunit()
  81         self.assertAlmostEqual(unit[self.x], 0.37139, 5)
  82         self.assertAlmostEqual(unit[self.y], 0.55709, 5)
  83         self.assertAlmostEqual(unit[self.z], 0.74278, 5)
  84
  85     def test_sub(self):
  86         self.assertEqual(self.vec1 - self.pt1, Point({self.x: 10, self.y: 25, self.z: 39}))
  87         self.assertEqual(self.vec1 - self.vec2, Vector({self.x: -25, self.y: -40, self.z: -40}))