mirror of
https://github.com/python/cpython.git
synced 2025-11-01 06:01:29 +00:00
warnings.catch_warnings() now returns a list or None instead of the custom
WarningsRecorder object. This makes the API simpler to use as no special object must be learned. Closes issue 3781. Review by Benjamin Peterson.
This commit is contained in:
Brett Cannon
parent
631be01252
commit
672237dc6c
24 changed files with 268 additions and 253 deletions
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@ -1,7 +1,6 @@
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import unittest
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import sys
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from test.test_support import (catch_warning, CleanImport,
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TestSkipped, run_unittest)
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from test.test_support import CleanImport, TestSkipped, run_unittest
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import warnings
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from contextlib import nested
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@ -13,11 +12,11 @@
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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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self.assertEqual(str(warning[-1].message), expected_message)
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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 catch_warning() as w:
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with warnings.catch_warnings(record=True) as w:
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exec "`2`" in {}
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self.assertWarning(None, w, expected)
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@ -28,71 +27,55 @@ def f(**kwargs): pass
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exec expr in {'f' : f}
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expected = "assignment to True or False is forbidden in 3.x"
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with catch_warning() as w:
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with warnings.catch_warnings(record=True) as w:
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safe_exec("True = False")
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self.assertWarning(None, w, expected)
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w.reset()
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safe_exec("False = True")
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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.False = True")
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except NameError: pass
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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.True = False")
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except NameError: pass
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self.assertWarning(None, w, expected)
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w.reset()
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safe_exec("def False(): pass")
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self.assertWarning(None, w, expected)
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w.reset()
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safe_exec("def True(): pass")
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self.assertWarning(None, w, expected)
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w.reset()
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safe_exec("class False: pass")
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self.assertWarning(None, w, expected)
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w.reset()
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safe_exec("class True: pass")
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self.assertWarning(None, w, expected)
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w.reset()
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safe_exec("def f(True=43): pass")
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self.assertWarning(None, w, expected)
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w.reset()
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safe_exec("def f(False=None): pass")
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self.assertWarning(None, w, expected)
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w.reset()
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safe_exec("f(False=True)")
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self.assertWarning(None, w, expected)
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w.reset()
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safe_exec("f(True=1)")
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self.assertWarning(None, w, expected)
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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 catch_warning() as w:
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with warnings.catch_warnings(record=True) 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 catch_warning() as w:
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with warnings.catch_warnings(record=True) 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 catch_warning() as w:
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with warnings.catch_warnings(record=True) 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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@ -103,9 +86,8 @@ def g():
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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 catch_warning() as w:
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with warnings.catch_warnings(record=True) 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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@ -114,13 +96,10 @@ 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 catch_warning() as w:
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with warnings.catch_warnings(record=True) 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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@ -128,13 +107,10 @@ def test_builtin_function_or_method_comparisons(self):
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'inequality comparisons not supported in 3.x')
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func = eval
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meth = {}.get
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with catch_warning() as w:
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with warnings.catch_warnings(record=True) 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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def test_sort_cmp_arg(self):
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@ -142,18 +118,15 @@ def test_sort_cmp_arg(self):
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lst = range(5)
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cmp = lambda x,y: -1
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with catch_warning() as w:
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with warnings.catch_warnings(record=True) 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 catch_warning() as w:
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with warnings.catch_warnings(record=True) 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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@ -162,17 +135,17 @@ 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 catch_warning() as w:
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with warnings.catch_warnings(record=True) 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 catch_warning() as w:
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with warnings.catch_warnings(record=True) 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 catch_warning() as w:
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with warnings.catch_warnings(record=True) as w:
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self.assertWarning(set(), w, expected)
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def test_slice_methods(self):
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@ -188,60 +161,59 @@ 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 catch_warning() as w:
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with warnings.catch_warnings(record=True) 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 catch_warning() as w:
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with warnings.catch_warnings(record=True) as w:
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exec "def f((a, b)): pass"
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self.assertWarning(None, w, expected)
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def test_buffer(self):
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expected = 'buffer() not supported in 3.x'
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with catch_warning() as w:
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with warnings.catch_warnings(record=True) 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 catch_warning() as w:
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with warnings.catch_warnings(record=True) 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 catch_warning() as w:
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with warnings.catch_warnings(record=True) 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), 1)
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self.assertWarning(None, w,
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"Overriding __cmp__ blocks inheritance of __hash__ in 3.x")
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w.reset()
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del w[:]
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class WarnOnlyEq(object):
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def __eq__(self, other): pass
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self.assertEqual(len(w), 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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del w[:]
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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), 2)
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self.assertWarning(None, w[-2],
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self.assertWarning(None, w[:1],
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"Overriding __cmp__ blocks inheritance of __hash__ in 3.x")
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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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del w[:]
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class NoWarningOnlyHash(object):
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def __hash__(self): pass
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self.assertEqual(len(w), 0)
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del w[:]
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# With an intermediate class in the heirarchy
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class DefinesAllThree(object):
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def __cmp__(self, other): pass
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@ -252,22 +224,22 @@ def __cmp__(self, other): pass
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self.assertEqual(len(w), 1)
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self.assertWarning(None, w,
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"Overriding __cmp__ blocks inheritance of __hash__ in 3.x")
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w.reset()
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del w[:]
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class WarnOnlyEq(DefinesAllThree):
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def __eq__(self, other): pass
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self.assertEqual(len(w), 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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del w[:]
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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), 2)
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self.assertWarning(None, w[-2],
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self.assertWarning(None, w[:1],
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"Overriding __cmp__ blocks inheritance of __hash__ in 3.x")
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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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del w[:]
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class NoWarningOnlyHash(DefinesAllThree):
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def __hash__(self): pass
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self.assertEqual(len(w), 0)
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@ -310,7 +282,7 @@ class TestStdlibRemovals(unittest.TestCase):
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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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with nested(CleanImport(module_name), catch_warning(record=False)):
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with nested(CleanImport(module_name), warnings.catch_warnings()):
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warnings.filterwarnings("error", ".+ removed",
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DeprecationWarning, __name__)
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try:
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@ -348,36 +320,36 @@ def test_os_path_walk(self):
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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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with catch_warning() as w:
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with warnings.catch_warnings(record=True) as w:
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mod.walk("crashers", dumbo, None)
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self.assertEquals(str(w.message), msg)
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self.assertEquals(str(w[-1].message), msg)
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def test_commands_members(self):
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import commands
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members = {"mk2arg" : 2, "mkarg" : 1, "getstatus" : 1}
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for name, arg_count in members.items():
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with catch_warning(record=False):
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with warnings.catch_warnings():
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warnings.filterwarnings("error")
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func = getattr(commands, name)
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self.assertRaises(DeprecationWarning, func, *([None]*arg_count))
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def test_reduce_move(self):
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from operator import add
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with catch_warning(record=False):
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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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with catch_warning(record=False):
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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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with catch_warning():
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with warnings.catch_warnings():
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warnings.simplefilter("always")
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run_unittest(TestPy3KWarnings,
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TestStdlibRemovals)
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