tests/test_isl.py

   1
   2 import unittest
   3
   4 from math import floor, ceil, trunc
   5
   6 from pypol.isl import *
   7
   8
   9 class TestContext(unittest.TestCase):
  10
  11     def test_eq(self):
  12         ctx1, ctx2 = Context(), Context()
  13         self.assertEqual(ctx1, ctx1)
  14         self.assertNotEqual(ctx1, ctx2)
  15
  16
  17 class TestValue(unittest.TestCase):
  18
  19     def setUp(self):
  20         self.context = Context()
  21         self.zero = Value(self.context)
  22         self.nan = Value(self.context, 'NaN')
  23         self.inf = Value(self.context, 'Inf')
  24         self.neginf = Value(self.context, '-Inf')
  25         self.answer = Value(self.context, 42)
  26         self.pi = Value(self.context, 22, 7)
  27
  28     def test_init(self):
  29         self.assertEqual(Value(self.context, 42), self.answer)
  30         self.assertEqual(Value(self.context, '42'), self.answer)
  31         self.assertEqual(Value(self.context, 22, 7), self.pi)
  32         self.assertEqual(Value(self.context, '-22/7'), -self.pi)
  33         self.assertTrue(Value(self.context, 'nan').is_nan())
  34         self.assertTrue(Value(self.context, '-nan').is_nan())
  35         self.assertTrue(Value(self.context, 'NaN').is_nan())
  36         self.assertEqual(Value(self.context, '-inf'), self.neginf)
  37         self.assertEqual(Value(self.context, '-Infinity'), self.neginf)
  38
  39     def test_numerator(self):
  40         self.assertEqual(self.zero.numerator, 0)
  41         self.assertEqual(self.answer.numerator, 42)
  42         self.assertEqual(self.pi.numerator, 22)
  43         with self.assertRaises(ValueError):
  44             self.nan.numerator
  45         with self.assertRaises(ValueError):
  46             self.inf.numerator
  47
  48     def test_denominator(self):
  49         self.assertEqual(self.zero.denominator, 1)
  50         self.assertEqual(self.answer.denominator, 1)
  51         self.assertEqual(self.pi.denominator, 7)
  52         with self.assertRaises(ValueError):
  53             self.nan.denominator
  54         with self.assertRaises(ValueError):
  55             self.inf.denominator
  56
  57     def test_bool(self):
  58         self.assertFalse(self.zero)
  59         self.assertTrue(self.answer)
  60         self.assertTrue(self.pi)
  61         self.assertEqual(bool(self.nan), bool(float('nan')))
  62         self.assertEqual(bool(self.inf), bool(float('inf')))
  63
  64     def test_lt(self):
  65         self.assertTrue(self.neginf < self.zero)
  66         self.assertTrue(self.zero < self.pi)
  67         self.assertTrue(self.pi < self.answer)
  68         self.assertTrue(self.answer < self.inf)
  69         self.assertFalse(self.nan < self.answer)
  70         self.assertFalse(self.nan < self.inf)
  71         self.assertFalse(self.nan < self.neginf)
  72         self.assertTrue(self.neginf < self.inf)
  73
  74     def test_le(self):
  75         self.assertTrue(self.pi <= self.pi)
  76         self.assertTrue(self.pi <= self.answer)
  77         self.assertFalse(self.answer <= self.pi)
  78
  79     def test_gt(self):
  80         self.assertFalse(self.pi > self.pi)
  81         self.assertTrue(self.answer > self.pi)
  82         self.assertFalse(self.pi > self.answer)
  83
  84     def test_ge(self):
  85         self.assertTrue(self.pi >= self.pi)
  86         self.assertTrue(self.answer >= self.pi)
  87         self.assertFalse(self.pi >= self.answer)
  88
  89     def test_eq(self):
  90         self.assertEqual(self.pi, self.pi)
  91         self.assertEqual(self.inf, self.inf)
  92         self.assertNotEqual(self.neginf, self.inf)
  93         self.assertNotEqual(self.nan, self.nan)
  94         self.assertEqual(self.zero, 0)
  95         self.assertEqual(0, self.zero)
  96         self.assertEqual(self.pi, Fraction(22, 7))
  97         self.assertEqual(Fraction(22, 7), self.pi)
  98         with self.assertRaises(TypeError):
  99             self.zero == 0.
 100
 101     def test_ne(self):
 102         self.assertTrue(self.pi != self.answer)
 103         self.assertFalse(self.pi != self.pi)
 104         self.assertTrue(self.neginf != self.inf)
 105         self.assertTrue(self.nan != self.nan)
 106
 107     def test_abs(self):
 108         self.assertEqual(abs(self.pi), self.pi)
 109         self.assertEqual(abs(self.neginf), self.inf)
 110         self.assertEqual(abs(-self.pi), self.pi)
 111         self.assertTrue(abs(self.nan).is_nan())
 112
 113     def test_pos(self):
 114         self.assertEqual(+self.pi, self.pi)
 115
 116     def test_neg(self):
 117         self.assertEqual(-self.neginf, self.inf)
 118         self.assertEqual(-(-self.pi), self.pi)
 119
 120     def test_floor(self):
 121         self.assertEqual(floor(self.pi), Value(self.context, 3))
 122         self.assertEqual(floor(-self.pi), Value(self.context, -4))
 123         # not float behavior, but makes sense
 124         self.assertEqual(floor(self.inf), self.inf)
 125         self.assertTrue(floor(self.nan).is_nan())
 126
 127     def test_ceil(self):
 128         self.assertEqual(ceil(self.pi), Value(self.context, 4))
 129         self.assertRaises(ceil(-self.pi) == Value(self.context, -3))
 130
 131     def test_trunc(self):
 132         self.assertEqual(trunc(self.pi), Value(self.context, 3))
 133         self.assertEqual(trunc(-self.pi), Value(self.context, -3))
 134
 135     def test_add(self):
 136         self.assertEqual(self.answer + self.answer, Value(self.context, 84))
 137         self.assertEqual(self.answer + self.pi, Value(self.context, 316, 7))
 138         self.assertEqual(self.pi + self.pi, Value(self.context, 44, 7))
 139         self.assertEqual(self.pi + self.neginf, self.neginf)
 140         self.assertEqual(self.pi + self.inf, self.inf)
 141         self.assertTrue((self.pi + self.nan).is_nan())
 142         self.assertTrue((self.inf + self.nan).is_nan())
 143         self.assertTrue((self.inf + self.neginf).is_nan())
 144         self.assertEqual(self.pi + 42, Value(self.context, 316, 7))
 145         self.assertEqual(42 + self.pi, Value(self.context, 316, 7))
 146         self.assertEqual(self.pi + Fraction(22, 7), Value(self.context, 44, 7))
 147         with self.assertRaises(TypeError):
 148             self.pi + float(42)
 149
 150     def test_sub(self):
 151         self.assertEqual(self.answer - self.pi, Value(self.context, 272, 7))
 152
 153     def test_mul(self):
 154         self.assertEqual(Value(self.context, 6) * Value(self.context, 7), self.answer)
 155         self.assertNotEqual(Value(self.context, 6) * Value(self.context, 9), self.answer)
 156         self.assertEqual(self.inf * Value(self.context, 2), self.inf)
 157         self.assertEqual(self.inf * Value(self.context, -2), self.neginf)
 158         self.assertTrue((self.nan * Value(self.context, 2)).is_nan())
 159         self.assertTrue((self.nan * self.inf).is_nan())
 160
 161     def test_div(self):
 162         self.assertEqual(Value(self.context, 22) / Value(self.context, 7), self.pi)
 163         self.assertEqual(self.pi / self.pi, Value(self.context, 1))
 164         # not float behavior, but makes sense
 165         self.assertTrue((self.pi / self.zero).is_nan())
 166
 167     def test_float(self):
 168         self.assertAlmostEqual(float(Value(self.context, 1, 2)), 0.5)
 169         self.assertTrue(math.isnan(float(Value(self.context, 'NaN'))))
 170         self.assertAlmostEqual(float(Value(self.context, 'Inf')), float('inf'))
 171
 172     def test_is_finite(self):
 173         self.assertTrue(self.pi.is_finite())
 174         self.assertFalse(self.inf.is_finite())
 175         self.assertFalse(self.nan.is_finite())
 176
 177     def test_is_infinite(self):
 178         self.assertFalse(self.pi.is_infinite())
 179         self.assertTrue(self.inf.is_infinite())
 180         self.assertFalse(self.nan.is_infinite())
 181
 182     def test_is_nan(self):
 183         self.assertFalse(self.pi.is_nan())
 184         self.assertFalse(self.inf.is_nan())
 185         self.assertTrue(self.nan.is_nan())
 186
 187     def test_str(self):
 188         self.assertEqual(str(self.answer), '42')
 189         self.assertEqual(str(self.pi), '22/7')
 190         self.assertEqual(str(self.nan), 'NaN')
 191         self.assertEqual(str(self.inf), 'Infinity')
 192         self.assertEqual(str(self.neginf), '-Infinity')
 193
 194     def test_repr(self):
 195         self.assertEqual(repr(self.answer), "Value('42')")
 196         self.assertEqual(repr(self.pi), "Value('22/7')")
 197         self.assertEqual(repr(self.nan), "Value('NaN')")
 198         self.assertEqual(repr(self.inf), "Value('Infinity')")
 199         self.assertEqual(repr(self.neginf), "Value('-Infinity')")