Lib.test.test_genexps_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 generator expression tests
Made for Jython.
"""
import unittest
from test import test_support
locals_test = list(local for local in locals() if not local.startswith('_'))
class GeneratorExpressionsTestCase(unittest.TestCase):
def test_module_level_locals(self):
# NOTE: The locals_test genexp used to cause a 'dictionary
# changed size during iteration' RuntimeError. If we've gotten
# this far we've already passed
self.assert_(sorted(locals_test) == ['test_support', 'unittest'])
#http://bugs.jython.org/issue1205 applied to genexps.
def test_long_genexp(self):
#for a long genexp, we compute the Hardy-Ramanujan number
#http://en.wikipedia.org/wiki/1729_(number)
res = ((x1**3+x2**3,(x1,x2),(y1,y2))
for x1 in range(20) for x2 in range(20) if x1 < x2 # x-Paare
for y1 in range(20) for y2 in range(20) if y1 < y2 # y-Paare
if x1**3+x2**3 == y1**3+y2**3 # gleiche Summe
if (x1,x2) < (y1,y2)
)
self.assertEquals(1729, res.next()[0])
def test_main():
test_support.run_unittest(GeneratorExpressionsTestCase)
if __name__ == '__main__':
test_main()