448 lines
19 KiB
Python
448 lines
19 KiB
Python
import unittest
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import sys
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from test.test_support import check_py3k_warnings, CleanImport, run_unittest
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import warnings
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from test import test_support
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if not sys.py3kwarning:
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raise unittest.SkipTest('%s must be run with the -3 flag' % __name__)
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try:
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from test.test_support import __warningregistry__ as _registry
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except ImportError:
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def check_deprecated_module(module_name):
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return False
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else:
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past_warnings = _registry.keys()
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del _registry
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def check_deprecated_module(module_name):
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"""Lookup the past warnings for module already loaded using
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test_support.import_module(..., deprecated=True)
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"""
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return any(module_name in msg and ' removed' in msg
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and issubclass(cls, DeprecationWarning)
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and (' module' in msg or ' package' in msg)
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for (msg, cls, line) in past_warnings)
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def reset_module_registry(module):
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try:
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registry = module.__warningregistry__
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except AttributeError:
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pass
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else:
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registry.clear()
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class TestPy3KWarnings(unittest.TestCase):
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def assertWarning(self, _, warning, expected_message):
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self.assertEqual(str(warning.message), expected_message)
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def assertNoWarning(self, _, recorder):
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self.assertEqual(len(recorder.warnings), 0)
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def test_backquote(self):
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expected = 'backquote not supported in 3.x; use repr()'
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with check_py3k_warnings((expected, SyntaxWarning)):
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exec "`2`" in {}
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def test_paren_arg_names(self):
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expected = 'parenthesized argument names are invalid in 3.x'
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def check(s):
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with check_py3k_warnings((expected, SyntaxWarning)):
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exec s in {}
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check("def f((x)): pass")
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check("def f((((x))), (y)): pass")
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check("def f((x), (((y))), m=32): pass")
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# Something like def f((a, (b))): pass will raise the tuple
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# unpacking warning.
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def test_forbidden_names(self):
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# So we don't screw up our globals
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def safe_exec(expr):
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def f(**kwargs): pass
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exec expr in {'f' : f}
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tests = [("True", "assignment to True or False is forbidden in 3.x"),
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("False", "assignment to True or False is forbidden in 3.x"),
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("nonlocal", "nonlocal is a keyword in 3.x")]
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with check_py3k_warnings(('', SyntaxWarning)) as w:
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for keyword, expected in tests:
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safe_exec("{0} = False".format(keyword))
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self.assertWarning(None, w, expected)
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w.reset()
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try:
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safe_exec("obj.{0} = True".format(keyword))
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except NameError:
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pass
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self.assertWarning(None, w, expected)
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w.reset()
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safe_exec("def {0}(): pass".format(keyword))
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self.assertWarning(None, w, expected)
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w.reset()
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safe_exec("class {0}: pass".format(keyword))
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self.assertWarning(None, w, expected)
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w.reset()
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safe_exec("def f({0}=43): pass".format(keyword))
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self.assertWarning(None, w, expected)
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w.reset()
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def test_type_inequality_comparisons(self):
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expected = 'type inequality comparisons not supported in 3.x'
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with check_py3k_warnings() as w:
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self.assertWarning(int < str, w, expected)
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w.reset()
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self.assertWarning(type < object, w, expected)
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def test_object_inequality_comparisons(self):
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expected = 'comparing unequal types not supported in 3.x'
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with check_py3k_warnings() as w:
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self.assertWarning(str < [], w, expected)
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w.reset()
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self.assertWarning(object() < (1, 2), w, expected)
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def test_dict_inequality_comparisons(self):
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expected = 'dict inequality comparisons not supported in 3.x'
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with check_py3k_warnings() as w:
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self.assertWarning({} < {2:3}, w, expected)
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w.reset()
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self.assertWarning({} <= {}, w, expected)
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w.reset()
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self.assertWarning({} > {2:3}, w, expected)
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w.reset()
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self.assertWarning({2:3} >= {}, w, expected)
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def test_cell_inequality_comparisons(self):
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expected = 'cell comparisons not supported in 3.x'
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def f(x):
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def g():
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return x
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return g
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cell0, = f(0).func_closure
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cell1, = f(1).func_closure
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with check_py3k_warnings() as w:
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self.assertWarning(cell0 == cell1, w, expected)
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w.reset()
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self.assertWarning(cell0 < cell1, w, expected)
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def test_code_inequality_comparisons(self):
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expected = 'code inequality comparisons not supported in 3.x'
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def f(x):
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pass
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def g(x):
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pass
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with check_py3k_warnings() as w:
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self.assertWarning(f.func_code < g.func_code, w, expected)
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w.reset()
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self.assertWarning(f.func_code <= g.func_code, w, expected)
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w.reset()
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self.assertWarning(f.func_code >= g.func_code, w, expected)
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w.reset()
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self.assertWarning(f.func_code > g.func_code, w, expected)
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def test_builtin_function_or_method_comparisons(self):
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expected = ('builtin_function_or_method '
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'order comparisons not supported in 3.x')
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func = eval
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meth = {}.get
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with check_py3k_warnings() as w:
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self.assertWarning(func < meth, w, expected)
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w.reset()
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self.assertWarning(func > meth, w, expected)
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w.reset()
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self.assertWarning(meth <= func, w, expected)
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w.reset()
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self.assertWarning(meth >= func, w, expected)
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w.reset()
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self.assertNoWarning(meth == func, w)
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self.assertNoWarning(meth != func, w)
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lam = lambda x: x
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self.assertNoWarning(lam == func, w)
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self.assertNoWarning(lam != func, w)
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def test_frame_attributes(self):
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template = "%s has been removed in 3.x"
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f = sys._getframe(0)
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for attr in ("f_exc_traceback", "f_exc_value", "f_exc_type"):
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expected = template % attr
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with check_py3k_warnings() as w:
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self.assertWarning(getattr(f, attr), w, expected)
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w.reset()
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self.assertWarning(setattr(f, attr, None), w, expected)
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def test_sort_cmp_arg(self):
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expected = "the cmp argument is not supported in 3.x"
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lst = range(5)
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cmp = lambda x,y: -1
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with check_py3k_warnings() as w:
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self.assertWarning(lst.sort(cmp=cmp), w, expected)
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w.reset()
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self.assertWarning(sorted(lst, cmp=cmp), w, expected)
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w.reset()
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self.assertWarning(lst.sort(cmp), w, expected)
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w.reset()
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self.assertWarning(sorted(lst, cmp), w, expected)
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def test_sys_exc_clear(self):
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expected = 'sys.exc_clear() not supported in 3.x; use except clauses'
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with check_py3k_warnings() as w:
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self.assertWarning(sys.exc_clear(), w, expected)
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def test_methods_members(self):
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expected = '__members__ and __methods__ not supported in 3.x'
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class C:
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__methods__ = ['a']
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__members__ = ['b']
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c = C()
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with check_py3k_warnings() as w:
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self.assertWarning(dir(c), w, expected)
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def test_softspace(self):
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expected = 'file.softspace not supported in 3.x'
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with file(__file__) as f:
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with check_py3k_warnings() as w:
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self.assertWarning(f.softspace, w, expected)
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def set():
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f.softspace = 0
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with check_py3k_warnings() as w:
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self.assertWarning(set(), w, expected)
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def test_slice_methods(self):
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class Spam(object):
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def __getslice__(self, i, j): pass
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def __setslice__(self, i, j, what): pass
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def __delslice__(self, i, j): pass
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class Egg:
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def __getslice__(self, i, h): pass
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def __setslice__(self, i, j, what): pass
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def __delslice__(self, i, j): pass
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expected = "in 3.x, __{0}slice__ has been removed; use __{0}item__"
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for obj in (Spam(), Egg()):
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with check_py3k_warnings() as w:
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self.assertWarning(obj[1:2], w, expected.format('get'))
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w.reset()
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del obj[3:4]
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self.assertWarning(None, w, expected.format('del'))
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w.reset()
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obj[4:5] = "eggs"
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self.assertWarning(None, w, expected.format('set'))
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def test_tuple_parameter_unpacking(self):
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expected = "tuple parameter unpacking has been removed in 3.x"
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with check_py3k_warnings((expected, SyntaxWarning)):
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exec "def f((a, b)): pass"
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def test_buffer(self):
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expected = 'buffer() not supported in 3.x'
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with check_py3k_warnings() as w:
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self.assertWarning(buffer('a'), w, expected)
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def test_file_xreadlines(self):
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expected = ("f.xreadlines() not supported in 3.x, "
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"try 'for line in f' instead")
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with file(__file__) as f:
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with check_py3k_warnings() as w:
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self.assertWarning(f.xreadlines(), w, expected)
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def test_hash_inheritance(self):
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with check_py3k_warnings() as w:
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# With object as the base class
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class WarnOnlyCmp(object):
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def __cmp__(self, other): pass
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self.assertEqual(len(w.warnings), 0)
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w.reset()
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class WarnOnlyEq(object):
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def __eq__(self, other): pass
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self.assertEqual(len(w.warnings), 1)
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self.assertWarning(None, w,
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"Overriding __eq__ blocks inheritance of __hash__ in 3.x")
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w.reset()
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class WarnCmpAndEq(object):
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def __cmp__(self, other): pass
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def __eq__(self, other): pass
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self.assertEqual(len(w.warnings), 1)
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self.assertWarning(None, w,
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"Overriding __eq__ blocks inheritance of __hash__ in 3.x")
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w.reset()
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class NoWarningOnlyHash(object):
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def __hash__(self): pass
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self.assertEqual(len(w.warnings), 0)
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# With an intermediate class in the hierarchy
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class DefinesAllThree(object):
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def __cmp__(self, other): pass
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def __eq__(self, other): pass
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def __hash__(self): pass
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class WarnOnlyCmp(DefinesAllThree):
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def __cmp__(self, other): pass
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self.assertEqual(len(w.warnings), 0)
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w.reset()
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class WarnOnlyEq(DefinesAllThree):
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def __eq__(self, other): pass
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self.assertEqual(len(w.warnings), 1)
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self.assertWarning(None, w,
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"Overriding __eq__ blocks inheritance of __hash__ in 3.x")
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w.reset()
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class WarnCmpAndEq(DefinesAllThree):
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def __cmp__(self, other): pass
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def __eq__(self, other): pass
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self.assertEqual(len(w.warnings), 1)
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self.assertWarning(None, w,
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"Overriding __eq__ blocks inheritance of __hash__ in 3.x")
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w.reset()
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class NoWarningOnlyHash(DefinesAllThree):
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def __hash__(self): pass
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self.assertEqual(len(w.warnings), 0)
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def test_operator(self):
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from operator import isCallable, sequenceIncludes
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callable_warn = ("operator.isCallable() is not supported in 3.x. "
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"Use hasattr(obj, '__call__').")
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seq_warn = ("operator.sequenceIncludes() is not supported "
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"in 3.x. Use operator.contains().")
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with check_py3k_warnings() as w:
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self.assertWarning(isCallable(self), w, callable_warn)
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w.reset()
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self.assertWarning(sequenceIncludes(range(3), 2), w, seq_warn)
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def test_nonascii_bytes_literals(self):
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expected = "non-ascii bytes literals not supported in 3.x"
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with check_py3k_warnings((expected, SyntaxWarning)):
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exec "b'\xbd'"
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class TestStdlibRemovals(unittest.TestCase):
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# test.testall not tested as it executes all unit tests as an
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# import side-effect.
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all_platforms = ('audiodev', 'imputil', 'mutex', 'user', 'new', 'rexec',
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'Bastion', 'compiler', 'dircache', 'mimetools',
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'fpformat', 'ihooks', 'mhlib', 'statvfs', 'htmllib',
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'sgmllib', 'rfc822', 'sunaudio')
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inclusive_platforms = {'irix' : ('pure', 'AL', 'al', 'CD', 'cd', 'cddb',
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'cdplayer', 'CL', 'cl', 'DEVICE', 'GL',
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'gl', 'ERRNO', 'FILE', 'FL', 'flp', 'fl',
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'fm', 'GET', 'GLWS', 'imgfile', 'IN',
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'IOCTL', 'jpeg', 'panel', 'panelparser',
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'readcd', 'SV', 'torgb', 'WAIT'),
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'darwin' : ('autoGIL', 'Carbon', 'OSATerminology',
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'icglue', 'Nav',
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# MacOS should (and does) give a Py3kWarning, but one of the
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# earlier tests already imports the MacOS extension which causes
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# this test to fail. Disabling the test for 'MacOS' avoids this
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# spurious test failure.
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#'MacOS',
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'aepack',
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'aetools', 'aetypes', 'applesingle',
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'appletrawmain', 'appletrunner',
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'argvemulator', 'bgenlocations',
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'EasyDialogs', 'macerrors', 'macostools',
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'findertools', 'FrameWork', 'ic',
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'gensuitemodule', 'icopen', 'macresource',
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'MiniAEFrame', 'pimp', 'PixMapWrapper',
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'terminalcommand', 'videoreader',
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'_builtinSuites', 'CodeWarrior',
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'Explorer', 'Finder', 'Netscape',
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'StdSuites', 'SystemEvents', 'Terminal',
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'cfmfile', 'bundlebuilder', 'buildtools',
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'ColorPicker', 'Audio_mac'),
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'sunos5' : ('sunaudiodev', 'SUNAUDIODEV'),
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}
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optional_modules = ('bsddb185', 'Canvas', 'dl', 'linuxaudiodev', 'imageop',
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'sv', 'bsddb', 'dbhash')
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def check_removal(self, module_name, optional=False):
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"""Make sure the specified module, when imported, raises a
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DeprecationWarning and specifies itself in the message."""
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if module_name in sys.modules:
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mod = sys.modules[module_name]
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filename = getattr(mod, '__file__', '')
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mod = None
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# the module is not implemented in C?
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if not filename.endswith(('.py', '.pyc', '.pyo')):
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# Issue #23375: If the module was already loaded, reimporting
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# the module will not emit again the warning. The warning is
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# emited when the module is loaded, but C modules cannot
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# unloaded.
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if test_support.verbose:
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print("Cannot test the Python 3 DeprecationWarning of the "
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"%s module, the C module is already loaded"
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% module_name)
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return
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with CleanImport(module_name), warnings.catch_warnings():
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warnings.filterwarnings("error", ".+ (module|package) .+ removed",
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DeprecationWarning, __name__)
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warnings.filterwarnings("error", ".+ removed .+ (module|package)",
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DeprecationWarning, __name__)
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try:
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__import__(module_name, level=0)
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except DeprecationWarning as exc:
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self.assertIn(module_name, exc.args[0],
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"%s warning didn't contain module name"
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% module_name)
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except ImportError:
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if not optional:
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self.fail("Non-optional module {0} raised an "
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"ImportError.".format(module_name))
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else:
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# For extension modules, check the __warningregistry__.
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# They won't rerun their init code even with CleanImport.
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if not check_deprecated_module(module_name):
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self.fail("DeprecationWarning not raised for {0}"
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.format(module_name))
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def test_platform_independent_removals(self):
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# Make sure that the modules that are available on all platforms raise
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# the proper DeprecationWarning.
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for module_name in self.all_platforms:
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self.check_removal(module_name)
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def test_platform_specific_removals(self):
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# Test the removal of platform-specific modules.
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for module_name in self.inclusive_platforms.get(sys.platform, []):
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self.check_removal(module_name, optional=True)
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def test_optional_module_removals(self):
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# Test the removal of modules that may or may not be built.
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for module_name in self.optional_modules:
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self.check_removal(module_name, optional=True)
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def test_os_path_walk(self):
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msg = "In 3.x, os.path.walk is removed in favor of os.walk."
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def dumbo(where, names, args): pass
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for path_mod in ("ntpath", "macpath", "os2emxpath", "posixpath"):
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mod = __import__(path_mod)
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reset_module_registry(mod)
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with check_py3k_warnings() as w:
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mod.walk("crashers", dumbo, None)
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self.assertEqual(str(w.message), msg)
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def test_reduce_move(self):
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from operator import add
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# reduce tests may have already triggered this warning
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reset_module_registry(unittest.case)
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with warnings.catch_warnings():
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warnings.filterwarnings("error", "reduce")
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self.assertRaises(DeprecationWarning, reduce, add, range(10))
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def test_mutablestring_removal(self):
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# UserString.MutableString has been removed in 3.0.
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import UserString
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# UserString tests may have already triggered this warning
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reset_module_registry(UserString)
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with warnings.catch_warnings():
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warnings.filterwarnings("error", ".*MutableString",
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DeprecationWarning)
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self.assertRaises(DeprecationWarning, UserString.MutableString)
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def test_main():
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run_unittest(TestPy3KWarnings,
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TestStdlibRemovals)
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if __name__ == '__main__':
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test_main()
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