Lib.test.test_complex_jy.py Maven / Gradle / Ivy
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Jython is an implementation of the high-level, dynamic, object-oriented
language Python written in 100% Pure Java, and seamlessly integrated with
the Java platform. It thus allows you to run Python on any Java platform.
"""Misc complex tests
Made for Jython.
"""
import unittest
from test import test_support
INF, NINF, NAN = map(float, ("inf", "-inf", "nan"))
class ComplexTest(unittest.TestCase):
def test_dunder_coerce(self):
self.assertEqual(complex.__coerce__(1+1j, None), NotImplemented)
self.assertRaises(TypeError, complex.__coerce__, None, 1+2j)
def test_pow(self):
class Foo(object):
def __rpow__(self, other):
return other ** 2
# regression in 2.5 alphas
self.assertEqual((4+0j) ** Foo(), (16+0j))
def test___nonzero__(self):
self.assertTrue(0.25+0j)
self.assertTrue(25j)
def test_abs_big(self):
# These are close to overflow but don't
close = [ complex( 1.794e+308, 0.000e+00),
complex( 1.119e+308, 1.403e+308),
complex(-3.992e+307, 1.749e+308),
complex(-1.617e+308, 7.785e+307),
complex(-1.617e+308,-7.785e+307),
complex(-3.992e+307,-1.749e+308) ]
# These are a little bigger and do overflow
over = [ complex( 1.130e+308, 1.417e+308),
complex(-4.032e+307, 1.767e+308),
complex(-1.633e+308, 7.863e+307),
complex(-1.633e+308,-7.863e+307),
complex(-4.032e+307,-1.767e+308) ]
# If you start with infinity, the return is infinity, no overflow
infinities = [ complex(INF, 1), complex(NINF, 2), complex(3, INF), complex(4, NINF) ]
for z in close :
self.assertAlmostEquals(abs(z), 1.794e+308, delta=0.01e+308)
for z in over :
self.assertRaises(OverflowError, abs, z)
for z in infinities :
self.assertEqual(abs(z), INF)
def test_main():
test_support.run_unittest(ComplexTest)
if __name__ == "__main__":
test_main()