diff options
Diffstat (limited to 'Lib/test/test_rational.py')
| -rw-r--r-- | Lib/test/test_rational.py | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/Lib/test/test_rational.py b/Lib/test/test_rational.py index e57adce..1bd1814 100644 --- a/Lib/test/test_rational.py +++ b/Lib/test/test_rational.py @@ -135,6 +135,29 @@ class RationalTest(unittest.TestCase): TypeError, "Cannot convert sNaN to Rational.", R.from_decimal, Decimal("snan")) + def testFromContinuedFraction(self): + self.assertRaises(TypeError, R.from_continued_fraction, None) + phi = R.from_continued_fraction([1]*100) + self.assertEquals(round(phi - (1 + 5 ** 0.5) / 2, 10), 0.0) + + minusphi = R.from_continued_fraction([-1]*100) + self.assertEquals(round(minusphi + (1 + 5 ** 0.5) / 2, 10), 0.0) + + self.assertEquals(R.from_continued_fraction([0]), R(0)) + self.assertEquals(R.from_continued_fraction([]), R(0)) + + def testAsContinuedFraction(self): + self.assertEqual(R.from_float(math.pi).as_continued_fraction()[:15], + [3, 7, 15, 1, 292, 1, 1, 1, 2, 1, 3, 1, 14, 3, 3]) + self.assertEqual(R.from_float(-math.pi).as_continued_fraction()[:16], + [-4, 1, 6, 15, 1, 292, 1, 1, 1, 2, 1, 3, 1, 14, 3, 3]) + self.assertEqual(R(0).as_continued_fraction(), [0]) + + def testApproximateFromFloat(self): + self.assertEqual(R.approximate_from_float(math.pi, 10000), R(355, 113)) + self.assertEqual(R.approximate_from_float(-math.pi, 10000), R(-355, 113)) + self.assertEqual(R.approximate_from_float(0.0, 10000), R(0)) + def testConversions(self): self.assertTypedEquals(-1, trunc(R(-11, 10))) self.assertTypedEquals(-2, math.floor(R(-11, 10))) |