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import unittest
from test import test_support
import sys, new
class NewTest(unittest.TestCase):
def test_spam(self):
class Eggs:
def get_yolks(self):
return self.yolks
m = new.module('Spam')
m.Eggs = Eggs
sys.modules['Spam'] = m
import Spam
def get_more_yolks(self):
return self.yolks + 3
# new.classobj()
C = new.classobj('Spam', (Spam.Eggs,), {'get_more_yolks': get_more_yolks})
# new.instance()
c = new.instance(C, {'yolks': 3})
o = new.instance(C)
self.assertEqual(o.__dict__, {}, "new __dict__ should be empty")
del o
o = new.instance(C, None)
self.assertEqual(o.__dict__, {}, "new __dict__ should be empty")
del o
def break_yolks(self):
self.yolks = self.yolks - 2
# new.instancemethod()
im = new.instancemethod(break_yolks, c, C)
self.assertEqual(c.get_yolks(), 3,
'Broken call of hand-crafted class instance')
self.assertEqual(c.get_more_yolks(), 6,
'Broken call of hand-crafted class instance')
im()
self.assertEqual(c.get_yolks(), 1,
'Broken call of hand-crafted instance method')
self.assertEqual(c.get_more_yolks(), 4,
'Broken call of hand-crafted instance method')
im = new.instancemethod(break_yolks, c)
im()
self.assertEqual(c.get_yolks(), -1)
# Verify that dangerous instance method creation is forbidden
self.assertRaises(TypeError, new.instancemethod, break_yolks, None)
# Verify that instancemethod() doesn't allow keyword args
self.assertRaises(TypeError, new.instancemethod, break_yolks, c, kw=1)
def test_scope(self):
# It's unclear what the semantics should be for a code object compiled
# at module scope, but bound and run in a function. In CPython, `c' is
# global (by accident?) while in Jython, `c' is local. The intent of
# the test clearly is to make `c' global, so let's be explicit about it.
codestr = '''
global c
a = 1
b = 2
c = a + b
'''
codestr = "\n".join(l.strip() for l in codestr.splitlines())
ccode = compile(codestr, '<string>', 'exec')
# Jython doesn't have a __builtins__, so use a portable alternative
import __builtin__
g = {'c': 0, '__builtins__': __builtin__}
# this test could be more robust
func = new.function(ccode, g)
func()
self.assertEqual(g['c'], 3, 'Could not create a proper function object')
def test_function(self):
# test the various extended flavors of function.new
def f(x):
def g(y):
return x + y
return g
g = f(4)
new.function(f.func_code, {}, "blah")
g2 = new.function(g.func_code, {}, "blah", (2,), g.func_closure)
self.assertEqual(g2(), 6)
g3 = new.function(g.func_code, {}, "blah", None, g.func_closure)
self.assertEqual(g3(5), 9)
def test_closure(func, closure, exc):
self.assertRaises(exc, new.function, func.func_code, {}, "", None, closure)
test_closure(g, None, TypeError) # invalid closure
test_closure(g, (1,), TypeError) # non-cell in closure
test_closure(g, (1, 1), ValueError) # closure is wrong size
test_closure(f, g.func_closure, ValueError) # no closure needed
# Note: Jython will never have new.code()
if hasattr(new, 'code'):
def test_code(self):
# bogus test of new.code()
def f(a): pass
c = f.func_code
argcount = c.co_argcount
nlocals = c.co_nlocals
stacksize = c.co_stacksize
flags = c.co_flags
codestring = c.co_code
constants = c.co_consts
names = c.co_names
varnames = c.co_varnames
filename = c.co_filename
name = c.co_name
firstlineno = c.co_firstlineno
lnotab = c.co_lnotab
freevars = c.co_freevars
cellvars = c.co_cellvars
d = new.code(argcount, nlocals, stacksize, flags, codestring,
constants, names, varnames, filename, name,
firstlineno, lnotab, freevars, cellvars)
# test backwards-compatibility version with no freevars or cellvars
d = new.code(argcount, nlocals, stacksize, flags, codestring,
constants, names, varnames, filename, name,
firstlineno, lnotab)
# negative co_argcount used to trigger a SystemError
self.assertRaises(ValueError, new.code,
-argcount, nlocals, stacksize, flags, codestring,
constants, names, varnames, filename, name, firstlineno, lnotab)
# negative co_nlocals used to trigger a SystemError
self.assertRaises(ValueError, new.code,
argcount, -nlocals, stacksize, flags, codestring,
constants, names, varnames, filename, name, firstlineno, lnotab)
# non-string co_name used to trigger a Py_FatalError
self.assertRaises(TypeError, new.code,
argcount, nlocals, stacksize, flags, codestring,
constants, (5,), varnames, filename, name, firstlineno, lnotab)
# new.code used to be a way to mutate a tuple...
class S(str):
pass
t = (S("ab"),)
d = new.code(argcount, nlocals, stacksize, flags, codestring,
constants, t, varnames, filename, name,
firstlineno, lnotab)
self.assert_(type(t[0]) is S, "eek, tuple changed under us!")
def test_main():
test_support.run_unittest(NewTest)
if __name__ == "__main__":
test_main()
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