lib-python.2.5.test.test_coercion.py Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of jython Show documentation
Show all versions of jython Show documentation
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.
import copy
import sys
import warnings
import unittest
from test.test_support import run_unittest, TestFailed
# Fake a number that implements numeric methods through __coerce__
class CoerceNumber:
def __init__(self, arg):
self.arg = arg
def __repr__(self):
return '' % repr(self.arg)
def __coerce__(self, other):
if isinstance(other, CoerceNumber):
return self.arg, other.arg
else:
return (self.arg, other)
# New-style class version of CoerceNumber
class CoerceTo(object):
def __init__(self, arg):
self.arg = arg
def __coerce__(self, other):
if isinstance(other, CoerceTo):
return self.arg, other.arg
else:
return self.arg, other
# Fake a number that implements numeric ops through methods.
class MethodNumber:
def __init__(self,arg):
self.arg = arg
def __repr__(self):
return '' % repr(self.arg)
def __add__(self,other):
return self.arg + other
def __radd__(self,other):
return other + self.arg
def __sub__(self,other):
return self.arg - other
def __rsub__(self,other):
return other - self.arg
def __mul__(self,other):
return self.arg * other
def __rmul__(self,other):
return other * self.arg
def __div__(self,other):
return self.arg / other
def __rdiv__(self,other):
return other / self.arg
def __truediv__(self,other):
return self.arg / other
def __rtruediv__(self,other):
return other / self.arg
def __floordiv__(self,other):
return self.arg // other
def __rfloordiv__(self,other):
return other // self.arg
def __pow__(self,other):
return self.arg ** other
def __rpow__(self,other):
return other ** self.arg
def __mod__(self,other):
return self.arg % other
def __rmod__(self,other):
return other % self.arg
def __cmp__(self, other):
return cmp(self.arg, other)
candidates = [2, 2L, 4.0, 2+0j, [1], (2,), None,
MethodNumber(2), CoerceNumber(2)]
infix_binops = [ '+', '-', '*', '**', '%', '//', '/' ]
TE = TypeError
# b = both normal and augmented give same result list
# s = single result lists for normal and augmented
# e = equals other results
# result lists: ['+', '-', '*', '**', '%', '//', ('classic /', 'new /')]
# ^^^^^^^^^^^^^^^^^^^^^^
# 2-tuple if results differ
# else only one value
infix_results = {
# 2
(0,0): ('b', [4, 0, 4, 4, 0, 1, (1, 1.0)]),
(0,1): ('e', (0,0)),
(0,2): ('b', [6.0, -2.0, 8.0, 16.0, 2.0, 0.0, 0.5]),
(0,3): ('b', [4+0j, 0+0j, 4+0j, 4+0j, 0+0j, 1+0j, 1+0j]),
(0,4): ('b', [TE, TE, [1, 1], TE, TE, TE, TE]),
(0,5): ('b', [TE, TE, (2, 2), TE, TE, TE, TE]),
(0,6): ('b', [TE, TE, TE, TE, TE, TE, TE]),
(0,7): ('e', (0,0)),
(0,8): ('e', (0,0)),
# 2L
(1,0): ('e', (0,0)),
(1,1): ('e', (0,1)),
(1,2): ('e', (0,2)),
(1,3): ('e', (0,3)),
(1,4): ('e', (0,4)),
(1,5): ('e', (0,5)),
(1,6): ('e', (0,6)),
(1,7): ('e', (0,7)),
(1,8): ('e', (0,8)),
# 4.0
(2,0): ('b', [6.0, 2.0, 8.0, 16.0, 0.0, 2.0, 2.0]),
(2,1): ('e', (2,0)),
(2,2): ('b', [8.0, 0.0, 16.0, 256.0, 0.0, 1.0, 1.0]),
(2,3): ('b', [6+0j, 2+0j, 8+0j, 16+0j, 0+0j, 2+0j, 2+0j]),
(2,4): ('b', [TE, TE, TE, TE, TE, TE, TE]),
(2,5): ('e', (2,4)),
(2,6): ('e', (2,4)),
(2,7): ('e', (2,0)),
(2,8): ('e', (2,0)),
# (2+0j)
(3,0): ('b', [4+0j, 0+0j, 4+0j, 4+0j, 0+0j, 1+0j, 1+0j]),
(3,1): ('e', (3,0)),
(3,2): ('b', [6+0j, -2+0j, 8+0j, 16+0j, 2+0j, 0+0j, 0.5+0j]),
(3,3): ('b', [4+0j, 0+0j, 4+0j, 4+0j, 0+0j, 1+0j, 1+0j]),
(3,4): ('b', [TE, TE, TE, TE, TE, TE, TE]),
(3,5): ('e', (3,4)),
(3,6): ('e', (3,4)),
(3,7): ('e', (3,0)),
(3,8): ('e', (3,0)),
# [1]
(4,0): ('b', [TE, TE, [1, 1], TE, TE, TE, TE]),
(4,1): ('e', (4,0)),
(4,2): ('b', [TE, TE, TE, TE, TE, TE, TE]),
(4,3): ('b', [TE, TE, TE, TE, TE, TE, TE]),
(4,4): ('b', [[1, 1], TE, TE, TE, TE, TE, TE]),
(4,5): ('s', [TE, TE, TE, TE, TE, TE, TE], [[1, 2], TE, TE, TE, TE, TE, TE]),
(4,6): ('b', [TE, TE, TE, TE, TE, TE, TE]),
(4,7): ('e', (4,0)),
(4,8): ('e', (4,0)),
# (2,)
(5,0): ('b', [TE, TE, (2, 2), TE, TE, TE, TE]),
(5,1): ('e', (5,0)),
(5,2): ('b', [TE, TE, TE, TE, TE, TE, TE]),
(5,3): ('e', (5,2)),
(5,4): ('e', (5,2)),
(5,5): ('b', [(2, 2), TE, TE, TE, TE, TE, TE]),
(5,6): ('b', [TE, TE, TE, TE, TE, TE, TE]),
(5,7): ('e', (5,0)),
(5,8): ('e', (5,0)),
# None
(6,0): ('b', [TE, TE, TE, TE, TE, TE, TE]),
(6,1): ('e', (6,0)),
(6,2): ('e', (6,0)),
(6,3): ('e', (6,0)),
(6,4): ('e', (6,0)),
(6,5): ('e', (6,0)),
(6,6): ('e', (6,0)),
(6,7): ('e', (6,0)),
(6,8): ('e', (6,0)),
# MethodNumber(2)
(7,0): ('e', (0,0)),
(7,1): ('e', (0,1)),
(7,2): ('e', (0,2)),
(7,3): ('e', (0,3)),
(7,4): ('e', (0,4)),
(7,5): ('e', (0,5)),
(7,6): ('e', (0,6)),
(7,7): ('e', (0,7)),
(7,8): ('e', (0,8)),
# CoerceNumber(2)
(8,0): ('e', (0,0)),
(8,1): ('e', (0,1)),
(8,2): ('e', (0,2)),
(8,3): ('e', (0,3)),
(8,4): ('e', (0,4)),
(8,5): ('e', (0,5)),
(8,6): ('e', (0,6)),
(8,7): ('e', (0,7)),
(8,8): ('e', (0,8)),
}
def process_infix_results():
for key in sorted(infix_results):
val = infix_results[key]
if val[0] == 'e':
infix_results[key] = infix_results[val[1]]
else:
if val[0] == 's':
res = (val[1], val[2])
elif val[0] == 'b':
res = (val[1], val[1])
for i in range(1):
if isinstance(res[i][6], tuple):
if 1/2 == 0:
# testing with classic (floor) division
res[i][6] = res[i][6][0]
else:
# testing with -Qnew
res[i][6] = res[i][6][1]
infix_results[key] = res
process_infix_results()
# now infix_results has two lists of results for every pairing.
prefix_binops = [ 'divmod' ]
prefix_results = [
[(1,0), (1L,0L), (0.0,2.0), ((1+0j),0j), TE, TE, TE, TE, (1,0)],
[(1L,0L), (1L,0L), (0.0,2.0), ((1+0j),0j), TE, TE, TE, TE, (1L,0L)],
[(2.0,0.0), (2.0,0.0), (1.0,0.0), ((2+0j),0j), TE, TE, TE, TE, (2.0,0.0)],
[((1+0j),0j), ((1+0j),0j), (0j,(2+0j)), ((1+0j),0j), TE, TE, TE, TE, ((1+0j),0j)],
[TE, TE, TE, TE, TE, TE, TE, TE, TE],
[TE, TE, TE, TE, TE, TE, TE, TE, TE],
[TE, TE, TE, TE, TE, TE, TE, TE, TE],
[TE, TE, TE, TE, TE, TE, TE, TE, TE],
[(1,0), (1L,0L), (0.0,2.0), ((1+0j),0j), TE, TE, TE, TE, (1,0)]
]
def format_float(value):
if abs(value) < 0.01:
return '0.0'
else:
return '%.1f' % value
# avoid testing platform fp quirks
def format_result(value):
if isinstance(value, complex):
return '(%s + %sj)' % (format_float(value.real),
format_float(value.imag))
elif isinstance(value, float):
return format_float(value)
return str(value)
class CoercionTest(unittest.TestCase):
def test_infix_binops(self):
for ia, a in enumerate(candidates):
for ib, b in enumerate(candidates):
results = infix_results[(ia, ib)]
for op, res, ires in zip(infix_binops, results[0], results[1]):
if res is TE:
self.assertRaises(TypeError, eval,
'a %s b' % op, {'a': a, 'b': b})
else:
self.assertEquals(format_result(res),
format_result(eval('a %s b' % op)),
'%s %s %s == %s failed' % (a, op, b, res))
try:
z = copy.copy(a)
except copy.Error:
z = a # assume it has no inplace ops
if ires is TE:
try:
exec 'z %s= b' % op
except TypeError:
pass
else:
self.fail("TypeError not raised")
else:
exec('z %s= b' % op)
self.assertEquals(ires, z)
def test_prefix_binops(self):
for ia, a in enumerate(candidates):
for ib, b in enumerate(candidates):
for op in prefix_binops:
res = prefix_results[ia][ib]
if res is TE:
self.assertRaises(TypeError, eval,
'%s(a, b)' % op, {'a': a, 'b': b})
else:
self.assertEquals(format_result(res),
format_result(eval('%s(a, b)' % op)),
'%s(%s, %s) == %s failed' % (op, a, b, res))
def test_cmptypes(self):
# Built-in tp_compare slots expect their arguments to have the
# same type, but a user-defined __coerce__ doesn't have to obey.
# SF #980352
evil_coercer = CoerceTo(42)
# Make sure these don't crash any more
self.assertNotEquals(cmp(u'fish', evil_coercer), 0)
self.assertNotEquals(cmp(slice(1), evil_coercer), 0)
# ...but that this still works
class WackyComparer(object):
def __cmp__(slf, other):
self.assert_(other == 42, 'expected evil_coercer, got %r' % other)
return 0
self.assertEquals(cmp(WackyComparer(), evil_coercer), 0)
# ...and classic classes too, since that code path is a little different
class ClassicWackyComparer:
def __cmp__(slf, other):
self.assert_(other == 42, 'expected evil_coercer, got %r' % other)
return 0
self.assertEquals(cmp(ClassicWackyComparer(), evil_coercer), 0)
def test_infinite_rec_classic_classes(self):
# if __coerce__() returns its arguments reversed it causes an infinite
# recursion for classic classes.
class Tester:
def __coerce__(self, other):
return other, self
exc = TestFailed("__coerce__() returning its arguments reverse "
"should raise RuntimeError")
try:
Tester() + 1
except (RuntimeError, TypeError):
return
except:
raise exc
else:
raise exc
def test_main():
warnings.filterwarnings("ignore",
r'complex divmod\(\), // and % are deprecated',
DeprecationWarning,
r'test.test_coercion$')
run_unittest(CoercionTest)
if __name__ == "__main__":
test_main()