cpython/Lib/test/test_coercion.py
Barry Warsaw 408b6d34de Complete the absolute import patch for the test suite. All relative
imports of test modules now import from the test package.  Other
related oddities are also fixed (like DeprecationWarning filters that
weren't specifying the full import part, etc.).  Also did a general
code cleanup to remove all "from test.test_support import *"'s.  Other
from...import *'s weren't changed.
2002-07-30 23:27:12 +00:00

119 lines
3.0 KiB
Python

import copy
import sys
import warnings
# Fake a number that implements numeric methods through __coerce__
class CoerceNumber:
def __init__(self, arg):
self.arg = arg
def __repr__(self):
return '<CoerceNumber %s>' % repr(self.arg)
def __coerce__(self, other):
if isinstance(other, CoerceNumber):
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 '<MethodNumber %s>' % 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 __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, 4.0, 2L, 2+0j, [1], (2,), None,
MethodNumber(1), CoerceNumber(2)]
infix_binops = [ '+', '-', '*', '/', '**', '%' ]
prefix_binops = [ 'divmod' ]
def do_infix_binops():
for a in candidates:
for b in candidates:
for op in infix_binops:
print '%s %s %s' % (a, op, b),
try:
x = eval('a %s b' % op)
except:
error = sys.exc_info()[:2]
print '... %s' % error[0]
else:
print '=', x
try:
z = copy.copy(a)
except copy.Error:
z = a # assume it has no inplace ops
print '%s %s= %s' % (a, op, b),
try:
exec('z %s= b' % op)
except:
error = sys.exc_info()[:2]
print '... %s' % error[0]
else:
print '=>', z
def do_prefix_binops():
for a in candidates:
for b in candidates:
for op in prefix_binops:
print '%s(%s, %s)' % (op, a, b),
try:
x = eval('%s(a, b)' % op)
except:
error = sys.exc_info()[:2]
print '... %s' % error[0]
else:
print '=', x
warnings.filterwarnings("ignore",
r'complex divmod\(\), // and % are deprecated',
DeprecationWarning,
r'test.test_coercion$')
do_infix_binops()
do_prefix_binops()