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, '', '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()