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import unittest
import sys
from test.test_support import (catch_warning, TestSkipped, run_unittest,
TestSkipped)
import warnings
if not sys.py3kwarning:
raise TestSkipped('%s must be run with the -3 flag' % __name__)
class TestPy3KWarnings(unittest.TestCase):
def test_type_inequality_comparisons(self):
expected = 'type inequality comparisons not supported in 3.x'
with catch_warning() as w:
self.assertWarning(int < str, w, expected)
with catch_warning() as w:
self.assertWarning(type < object, w, expected)
def test_object_inequality_comparisons(self):
expected = 'comparing unequal types not supported in 3.x'
with catch_warning() as w:
self.assertWarning(str < [], w, expected)
with catch_warning() as w:
self.assertWarning(object() < (1, 2), w, expected)
def test_dict_inequality_comparisons(self):
expected = 'dict inequality comparisons not supported in 3.x'
with catch_warning() as w:
self.assertWarning({} < {2:3}, w, expected)
with catch_warning() as w:
self.assertWarning({} <= {}, w, expected)
with catch_warning() as w:
self.assertWarning({} > {2:3}, w, expected)
with catch_warning() as w:
self.assertWarning({2:3} >= {}, w, expected)
def test_cell_inequality_comparisons(self):
expected = 'cell comparisons not supported in 3.x'
def f(x):
def g():
return x
return g
cell0, = f(0).func_closure
cell1, = f(1).func_closure
with catch_warning() as w:
self.assertWarning(cell0 == cell1, w, expected)
with catch_warning() as w:
self.assertWarning(cell0 < cell1, w, expected)
def test_code_inequality_comparisons(self):
expected = 'code inequality comparisons not supported in 3.x'
def f(x):
pass
def g(x):
pass
with catch_warning() as w:
self.assertWarning(f.func_code < g.func_code, w, expected)
with catch_warning() as w:
self.assertWarning(f.func_code <= g.func_code, w, expected)
with catch_warning() as w:
self.assertWarning(f.func_code >= g.func_code, w, expected)
with catch_warning() as w:
self.assertWarning(f.func_code > g.func_code, w, expected)
def test_builtin_function_or_method_comparisons(self):
expected = ('builtin_function_or_method '
'inequality comparisons not supported in 3.x')
func = eval
meth = {}.get
with catch_warning() as w:
self.assertWarning(func < meth, w, expected)
with catch_warning() as w:
self.assertWarning(func > meth, w, expected)
with catch_warning() as w:
self.assertWarning(meth <= func, w, expected)
with catch_warning() as w:
self.assertWarning(meth >= func, w, expected)
def assertWarning(self, _, warning, expected_message):
self.assertEqual(str(warning.message), expected_message)
def test_sort_cmp_arg(self):
expected = "the cmp argument is not supported in 3.x"
lst = range(5)
cmp = lambda x,y: -1
with catch_warning() as w:
self.assertWarning(lst.sort(cmp=cmp), w, expected)
with catch_warning() as w:
self.assertWarning(sorted(lst, cmp=cmp), w, expected)
with catch_warning() as w:
self.assertWarning(lst.sort(cmp), w, expected)
with catch_warning() as w:
self.assertWarning(sorted(lst, cmp), w, expected)
def test_sys_exc_clear(self):
expected = 'sys.exc_clear() not supported in 3.x; use except clauses'
with catch_warning() as w:
self.assertWarning(sys.exc_clear(), w, expected)
def test_methods_members(self):
expected = '__members__ and __methods__ not supported in 3.x'
class C:
__methods__ = ['a']
__members__ = ['b']
c = C()
with catch_warning() as w:
self.assertWarning(dir(c), w, expected)
def test_softspace(self):
expected = 'file.softspace not supported in 3.x'
with file(__file__) as f:
with catch_warning() as w:
self.assertWarning(f.softspace, w, expected)
def set():
f.softspace = 0
with catch_warning() as w:
self.assertWarning(set(), w, expected)
def test_buffer(self):
expected = 'buffer() not supported in 3.x; use memoryview()'
with catch_warning() as w:
self.assertWarning(buffer('a'), w, expected)
class TestStdlibRemovals(unittest.TestCase):
all_platforms = ('audiodev', 'imputil', 'mutex', 'user')
def check_removal(self, module_name):
"""Make sure the specified module, when imported, raises a
DeprecationWarning and specifies itself in the message."""
original_module = None
if module_name in sys.modules:
original_module = sys.modules[module_name]
del sys.modules[module_name]
try:
with catch_warning() as w:
warnings.filterwarnings("error", ".+ removed",
DeprecationWarning)
try:
__import__(module_name, level=0)
except DeprecationWarning as exc:
self.assert_(module_name in exc.args[0])
else:
self.fail("DeprecationWarning not raised for %s" %
module_name)
finally:
if original_module:
sys.modules[module_name] = original_module
def test_platform_independent_removals(self):
# Make sure that the modules that are available on all platforms raise
# the proper DeprecationWarning.
for module_name in self.all_platforms:
self.check_removal(module_name)
def test_os_path_walk(self):
msg = "In 3.x, os.path.walk is removed in favor of os.walk."
def dumbo(where, names, args): pass
for path_mod in ("ntpath", "macpath", "os2emxpath", "posixpath"):
mod = __import__(path_mod)
with catch_warning() as w:
# Since os3exmpath just imports it from ntpath
warnings.simplefilter("always")
mod.walk(".", dumbo, None)
self.assertEquals(str(w.message), msg)
def test_main():
run_unittest(TestPy3KWarnings, TestStdlibRemovals)
if __name__ == '__main__':
test_main()
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