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		bf17d41826
		
	
	
	
	
		
			
			Additional note: the `method_check_args` function in `Objects/descrobject.c` is written in such a way that it applies to all kinds of descriptors. In particular, a future re-implementation of `wrapper_descriptor` could use that code. CC @vstinner @encukou https://bugs.python.org/issue37645 Automerge-Triggered-By: @encukou
		
			
				
	
	
		
			670 lines
		
	
	
	
		
			24 KiB
		
	
	
	
		
			Python
		
	
	
	
	
	
			
		
		
	
	
			670 lines
		
	
	
	
		
			24 KiB
		
	
	
	
		
			Python
		
	
	
	
	
	
| import datetime
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| import unittest
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| from test.support import cpython_only
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| try:
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|     import _testcapi
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| except ImportError:
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|     _testcapi = None
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| import struct
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| import collections
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| import itertools
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| import gc
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| 
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| 
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| class FunctionCalls(unittest.TestCase):
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| 
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|     def test_kwargs_order(self):
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|         # bpo-34320:  **kwargs should preserve order of passed OrderedDict
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|         od = collections.OrderedDict([('a', 1), ('b', 2)])
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|         od.move_to_end('a')
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|         expected = list(od.items())
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| 
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|         def fn(**kw):
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|             return kw
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| 
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|         res = fn(**od)
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|         self.assertIsInstance(res, dict)
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|         self.assertEqual(list(res.items()), expected)
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| 
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| 
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| @cpython_only
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| class CFunctionCallsErrorMessages(unittest.TestCase):
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| 
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|     def test_varargs0(self):
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|         msg = r"__contains__\(\) takes exactly one argument \(0 given\)"
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|         self.assertRaisesRegex(TypeError, msg, {}.__contains__)
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| 
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|     def test_varargs2(self):
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|         msg = r"__contains__\(\) takes exactly one argument \(2 given\)"
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|         self.assertRaisesRegex(TypeError, msg, {}.__contains__, 0, 1)
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| 
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|     def test_varargs3(self):
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|         msg = r"^from_bytes\(\) takes exactly 2 positional arguments \(3 given\)"
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|         self.assertRaisesRegex(TypeError, msg, int.from_bytes, b'a', 'little', False)
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| 
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|     def test_varargs1min(self):
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|         msg = r"get expected at least 1 argument, got 0"
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|         self.assertRaisesRegex(TypeError, msg, {}.get)
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| 
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|         msg = r"expected 1 argument, got 0"
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|         self.assertRaisesRegex(TypeError, msg, {}.__delattr__)
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| 
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|     def test_varargs2min(self):
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|         msg = r"getattr expected at least 2 arguments, got 0"
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|         self.assertRaisesRegex(TypeError, msg, getattr)
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| 
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|     def test_varargs1max(self):
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|         msg = r"input expected at most 1 argument, got 2"
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|         self.assertRaisesRegex(TypeError, msg, input, 1, 2)
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| 
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|     def test_varargs2max(self):
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|         msg = r"get expected at most 2 arguments, got 3"
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|         self.assertRaisesRegex(TypeError, msg, {}.get, 1, 2, 3)
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| 
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|     def test_varargs1_kw(self):
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|         msg = r"__contains__\(\) takes no keyword arguments"
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|         self.assertRaisesRegex(TypeError, msg, {}.__contains__, x=2)
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| 
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|     def test_varargs2_kw(self):
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|         msg = r"__contains__\(\) takes no keyword arguments"
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|         self.assertRaisesRegex(TypeError, msg, {}.__contains__, x=2, y=2)
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| 
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|     def test_varargs3_kw(self):
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|         msg = r"bool\(\) takes no keyword arguments"
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|         self.assertRaisesRegex(TypeError, msg, bool, x=2)
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| 
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|     def test_varargs4_kw(self):
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|         msg = r"^list[.]index\(\) takes no keyword arguments$"
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|         self.assertRaisesRegex(TypeError, msg, [].index, x=2)
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| 
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|     def test_varargs5_kw(self):
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|         msg = r"^hasattr\(\) takes no keyword arguments$"
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|         self.assertRaisesRegex(TypeError, msg, hasattr, x=2)
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| 
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|     def test_varargs6_kw(self):
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|         msg = r"^getattr\(\) takes no keyword arguments$"
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|         self.assertRaisesRegex(TypeError, msg, getattr, x=2)
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| 
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|     def test_varargs7_kw(self):
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|         msg = r"^next\(\) takes no keyword arguments$"
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|         self.assertRaisesRegex(TypeError, msg, next, x=2)
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| 
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|     def test_varargs8_kw(self):
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|         msg = r"^_struct[.]pack\(\) takes no keyword arguments$"
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|         self.assertRaisesRegex(TypeError, msg, struct.pack, x=2)
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| 
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|     def test_varargs9_kw(self):
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|         msg = r"^_struct[.]pack_into\(\) takes no keyword arguments$"
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|         self.assertRaisesRegex(TypeError, msg, struct.pack_into, x=2)
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| 
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|     def test_varargs10_kw(self):
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|         msg = r"^deque[.]index\(\) takes no keyword arguments$"
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|         self.assertRaisesRegex(TypeError, msg, collections.deque().index, x=2)
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| 
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|     def test_varargs11_kw(self):
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|         msg = r"^Struct[.]pack\(\) takes no keyword arguments$"
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|         self.assertRaisesRegex(TypeError, msg, struct.Struct.pack, struct.Struct(""), x=2)
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| 
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|     def test_varargs12_kw(self):
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|         msg = r"^staticmethod\(\) takes no keyword arguments$"
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|         self.assertRaisesRegex(TypeError, msg, staticmethod, func=id)
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| 
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|     def test_varargs13_kw(self):
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|         msg = r"^classmethod\(\) takes no keyword arguments$"
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|         self.assertRaisesRegex(TypeError, msg, classmethod, func=id)
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| 
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|     def test_varargs14_kw(self):
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|         msg = r"^product\(\) takes at most 1 keyword argument \(2 given\)$"
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|         self.assertRaisesRegex(TypeError, msg,
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|                                itertools.product, 0, repeat=1, foo=2)
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| 
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|     def test_varargs15_kw(self):
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|         msg = r"^ImportError\(\) takes at most 2 keyword arguments \(3 given\)$"
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|         self.assertRaisesRegex(TypeError, msg,
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|                                ImportError, 0, name=1, path=2, foo=3)
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| 
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|     def test_varargs16_kw(self):
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|         msg = r"^min\(\) takes at most 2 keyword arguments \(3 given\)$"
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|         self.assertRaisesRegex(TypeError, msg,
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|                                min, 0, default=1, key=2, foo=3)
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| 
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|     def test_varargs17_kw(self):
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|         msg = r"^print\(\) takes at most 4 keyword arguments \(5 given\)$"
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|         self.assertRaisesRegex(TypeError, msg,
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|                                print, 0, sep=1, end=2, file=3, flush=4, foo=5)
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| 
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|     def test_oldargs0_1(self):
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|         msg = r"keys\(\) takes no arguments \(1 given\)"
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|         self.assertRaisesRegex(TypeError, msg, {}.keys, 0)
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| 
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|     def test_oldargs0_2(self):
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|         msg = r"keys\(\) takes no arguments \(2 given\)"
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|         self.assertRaisesRegex(TypeError, msg, {}.keys, 0, 1)
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| 
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|     def test_oldargs0_1_kw(self):
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|         msg = r"keys\(\) takes no keyword arguments"
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|         self.assertRaisesRegex(TypeError, msg, {}.keys, x=2)
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| 
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|     def test_oldargs0_2_kw(self):
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|         msg = r"keys\(\) takes no keyword arguments"
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|         self.assertRaisesRegex(TypeError, msg, {}.keys, x=2, y=2)
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| 
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|     def test_oldargs1_0(self):
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|         msg = r"count\(\) takes exactly one argument \(0 given\)"
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|         self.assertRaisesRegex(TypeError, msg, [].count)
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| 
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|     def test_oldargs1_2(self):
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|         msg = r"count\(\) takes exactly one argument \(2 given\)"
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|         self.assertRaisesRegex(TypeError, msg, [].count, 1, 2)
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| 
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|     def test_oldargs1_0_kw(self):
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|         msg = r"count\(\) takes no keyword arguments"
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|         self.assertRaisesRegex(TypeError, msg, [].count, x=2)
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| 
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|     def test_oldargs1_1_kw(self):
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|         msg = r"count\(\) takes no keyword arguments"
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|         self.assertRaisesRegex(TypeError, msg, [].count, {}, x=2)
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| 
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|     def test_oldargs1_2_kw(self):
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|         msg = r"count\(\) takes no keyword arguments"
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|         self.assertRaisesRegex(TypeError, msg, [].count, x=2, y=2)
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| 
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| 
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| 
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| class TestCallingConventions(unittest.TestCase):
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|     """Test calling using various C calling conventions (METH_*) from Python
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| 
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|     Subclasses test several kinds of functions (module-level, methods,
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|     class methods static methods) using these attributes:
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|       obj: the object that contains tested functions (as attributes)
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|       expected_self: expected "self" argument to the C function
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| 
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|     The base class tests module-level functions.
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|     """
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| 
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|     def setUp(self):
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|         self.obj = self.expected_self = _testcapi
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| 
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|     def test_varargs(self):
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|         self.assertEqual(
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|             self.obj.meth_varargs(1, 2, 3),
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|             (self.expected_self, (1, 2, 3)),
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|         )
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| 
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|     def test_varargs_ext(self):
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|         self.assertEqual(
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|             self.obj.meth_varargs(*(1, 2, 3)),
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|             (self.expected_self, (1, 2, 3)),
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|         )
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| 
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|     def test_varargs_error_kw(self):
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|         msg = r"meth_varargs\(\) takes no keyword arguments"
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|         self.assertRaisesRegex(
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|             TypeError, msg, lambda: self.obj.meth_varargs(k=1),
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|         )
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| 
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|     def test_varargs_keywords(self):
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|         self.assertEqual(
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|             self.obj.meth_varargs_keywords(1, 2, a=3, b=4),
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|             (self.expected_self, (1, 2), {'a': 3, 'b': 4})
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|         )
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| 
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|     def test_varargs_keywords_ext(self):
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|         self.assertEqual(
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|             self.obj.meth_varargs_keywords(*[1, 2], **{'a': 3, 'b': 4}),
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|             (self.expected_self, (1, 2), {'a': 3, 'b': 4})
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|         )
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| 
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|     def test_o(self):
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|         self.assertEqual(self.obj.meth_o(1), (self.expected_self, 1))
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| 
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|     def test_o_ext(self):
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|         self.assertEqual(self.obj.meth_o(*[1]), (self.expected_self, 1))
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| 
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|     def test_o_error_no_arg(self):
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|         msg = r"meth_o\(\) takes exactly one argument \(0 given\)"
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|         self.assertRaisesRegex(TypeError, msg, self.obj.meth_o)
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| 
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|     def test_o_error_two_args(self):
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|         msg = r"meth_o\(\) takes exactly one argument \(2 given\)"
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|         self.assertRaisesRegex(
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|             TypeError, msg, lambda: self.obj.meth_o(1, 2),
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|         )
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| 
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|     def test_o_error_ext(self):
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|         msg = r"meth_o\(\) takes exactly one argument \(3 given\)"
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|         self.assertRaisesRegex(
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|             TypeError, msg, lambda: self.obj.meth_o(*(1, 2, 3)),
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|         )
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| 
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|     def test_o_error_kw(self):
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|         msg = r"meth_o\(\) takes no keyword arguments"
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|         self.assertRaisesRegex(
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|             TypeError, msg, lambda: self.obj.meth_o(k=1),
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|         )
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| 
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|     def test_o_error_arg_kw(self):
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|         msg = r"meth_o\(\) takes no keyword arguments"
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|         self.assertRaisesRegex(
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|             TypeError, msg, lambda: self.obj.meth_o(k=1),
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|         )
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| 
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|     def test_noargs(self):
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|         self.assertEqual(self.obj.meth_noargs(), self.expected_self)
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| 
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|     def test_noargs_ext(self):
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|         self.assertEqual(self.obj.meth_noargs(*[]), self.expected_self)
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| 
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|     def test_noargs_error_arg(self):
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|         msg = r"meth_noargs\(\) takes no arguments \(1 given\)"
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|         self.assertRaisesRegex(
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|             TypeError, msg, lambda: self.obj.meth_noargs(1),
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|         )
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| 
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|     def test_noargs_error_arg2(self):
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|         msg = r"meth_noargs\(\) takes no arguments \(2 given\)"
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|         self.assertRaisesRegex(
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|             TypeError, msg, lambda: self.obj.meth_noargs(1, 2),
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|         )
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| 
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|     def test_noargs_error_ext(self):
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|         msg = r"meth_noargs\(\) takes no arguments \(3 given\)"
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|         self.assertRaisesRegex(
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|             TypeError, msg, lambda: self.obj.meth_noargs(*(1, 2, 3)),
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|         )
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| 
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|     def test_noargs_error_kw(self):
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|         msg = r"meth_noargs\(\) takes no keyword arguments"
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|         self.assertRaisesRegex(
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|             TypeError, msg, lambda: self.obj.meth_noargs(k=1),
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|         )
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| 
 | |
|     def test_fastcall(self):
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|         self.assertEqual(
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|             self.obj.meth_fastcall(1, 2, 3),
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|             (self.expected_self, (1, 2, 3)),
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|         )
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| 
 | |
|     def test_fastcall_ext(self):
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|         self.assertEqual(
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|             self.obj.meth_fastcall(*(1, 2, 3)),
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|             (self.expected_self, (1, 2, 3)),
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|         )
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| 
 | |
|     def test_fastcall_error_kw(self):
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|         msg = r"meth_fastcall\(\) takes no keyword arguments"
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|         self.assertRaisesRegex(
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|             TypeError, msg, lambda: self.obj.meth_fastcall(k=1),
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|         )
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| 
 | |
|     def test_fastcall_keywords(self):
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|         self.assertEqual(
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|             self.obj.meth_fastcall_keywords(1, 2, a=3, b=4),
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|             (self.expected_self, (1, 2), {'a': 3, 'b': 4})
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|         )
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| 
 | |
|     def test_fastcall_keywords_ext(self):
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|         self.assertEqual(
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|             self.obj.meth_fastcall_keywords(*(1, 2), **{'a': 3, 'b': 4}),
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|             (self.expected_self, (1, 2), {'a': 3, 'b': 4})
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|         )
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| 
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| 
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| class TestCallingConventionsInstance(TestCallingConventions):
 | |
|     """Test calling instance methods using various calling conventions"""
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| 
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|     def setUp(self):
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|         self.obj = self.expected_self = _testcapi.MethInstance()
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| 
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| 
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| class TestCallingConventionsClass(TestCallingConventions):
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|     """Test calling class methods using various calling conventions"""
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| 
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|     def setUp(self):
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|         self.obj = self.expected_self = _testcapi.MethClass
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| 
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| 
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| class TestCallingConventionsClassInstance(TestCallingConventions):
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|     """Test calling class methods on instance"""
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| 
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|     def setUp(self):
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|         self.obj = _testcapi.MethClass()
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|         self.expected_self = _testcapi.MethClass
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| 
 | |
| 
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| class TestCallingConventionsStatic(TestCallingConventions):
 | |
|     """Test calling static methods using various calling conventions"""
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| 
 | |
|     def setUp(self):
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|         self.obj = _testcapi.MethStatic()
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|         self.expected_self = None
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| 
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| 
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| def pyfunc(arg1, arg2):
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|     return [arg1, arg2]
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| 
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| 
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| def pyfunc_noarg():
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|     return "noarg"
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| 
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| 
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| class PythonClass:
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|     def method(self, arg1, arg2):
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|         return [arg1, arg2]
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| 
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|     def method_noarg(self):
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|         return "noarg"
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| 
 | |
|     @classmethod
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|     def class_method(cls):
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|         return "classmethod"
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| 
 | |
|     @staticmethod
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|     def static_method():
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|         return "staticmethod"
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| 
 | |
| 
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| PYTHON_INSTANCE = PythonClass()
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| 
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| NULL_OR_EMPTY = object()
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| 
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| class FastCallTests(unittest.TestCase):
 | |
|     """Test calling using various callables from C
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|     """
 | |
| 
 | |
|     # Test calls with positional arguments
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|     CALLS_POSARGS = [
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|         # (func, args: tuple, result)
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| 
 | |
|         # Python function with 2 arguments
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|         (pyfunc, (1, 2), [1, 2]),
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| 
 | |
|         # Python function without argument
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|         (pyfunc_noarg, (), "noarg"),
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| 
 | |
|         # Python class methods
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|         (PythonClass.class_method, (), "classmethod"),
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|         (PythonClass.static_method, (), "staticmethod"),
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| 
 | |
|         # Python instance methods
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|         (PYTHON_INSTANCE.method, (1, 2), [1, 2]),
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|         (PYTHON_INSTANCE.method_noarg, (), "noarg"),
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|         (PYTHON_INSTANCE.class_method, (), "classmethod"),
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|         (PYTHON_INSTANCE.static_method, (), "staticmethod"),
 | |
| 
 | |
|         # C callables are added later
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|     ]
 | |
| 
 | |
|     # Test calls with positional and keyword arguments
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|     CALLS_KWARGS = [
 | |
|         # (func, args: tuple, kwargs: dict, result)
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| 
 | |
|         # Python function with 2 arguments
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|         (pyfunc, (1,), {'arg2': 2}, [1, 2]),
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|         (pyfunc, (), {'arg1': 1, 'arg2': 2}, [1, 2]),
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| 
 | |
|         # Python instance methods
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|         (PYTHON_INSTANCE.method, (1,), {'arg2': 2}, [1, 2]),
 | |
|         (PYTHON_INSTANCE.method, (), {'arg1': 1, 'arg2': 2}, [1, 2]),
 | |
| 
 | |
|         # C callables are added later
 | |
|     ]
 | |
| 
 | |
|     # Add all the calling conventions and variants of C callables
 | |
|     _instance = _testcapi.MethInstance()
 | |
|     for obj, expected_self in (
 | |
|         (_testcapi, _testcapi),  # module-level function
 | |
|         (_instance, _instance),  # bound method
 | |
|         (_testcapi.MethClass, _testcapi.MethClass),  # class method on class
 | |
|         (_testcapi.MethClass(), _testcapi.MethClass),  # class method on inst.
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|         (_testcapi.MethStatic, None),  # static method
 | |
|     ):
 | |
|         CALLS_POSARGS.extend([
 | |
|             (obj.meth_varargs, (1, 2), (expected_self, (1, 2))),
 | |
|             (obj.meth_varargs_keywords,
 | |
|                 (1, 2), (expected_self, (1, 2), NULL_OR_EMPTY)),
 | |
|             (obj.meth_fastcall, (1, 2), (expected_self, (1, 2))),
 | |
|             (obj.meth_fastcall, (), (expected_self, ())),
 | |
|             (obj.meth_fastcall_keywords,
 | |
|                 (1, 2), (expected_self, (1, 2), NULL_OR_EMPTY)),
 | |
|             (obj.meth_fastcall_keywords,
 | |
|                 (), (expected_self, (), NULL_OR_EMPTY)),
 | |
|             (obj.meth_noargs, (), expected_self),
 | |
|             (obj.meth_o, (123, ), (expected_self, 123)),
 | |
|         ])
 | |
| 
 | |
|         CALLS_KWARGS.extend([
 | |
|             (obj.meth_varargs_keywords,
 | |
|                 (1, 2), {'x': 'y'}, (expected_self, (1, 2), {'x': 'y'})),
 | |
|             (obj.meth_varargs_keywords,
 | |
|                 (), {'x': 'y'}, (expected_self, (), {'x': 'y'})),
 | |
|             (obj.meth_varargs_keywords,
 | |
|                 (1, 2), {}, (expected_self, (1, 2), NULL_OR_EMPTY)),
 | |
|             (obj.meth_fastcall_keywords,
 | |
|                 (1, 2), {'x': 'y'}, (expected_self, (1, 2), {'x': 'y'})),
 | |
|             (obj.meth_fastcall_keywords,
 | |
|                 (), {'x': 'y'}, (expected_self, (), {'x': 'y'})),
 | |
|             (obj.meth_fastcall_keywords,
 | |
|                 (1, 2), {}, (expected_self, (1, 2), NULL_OR_EMPTY)),
 | |
|         ])
 | |
| 
 | |
|     def check_result(self, result, expected):
 | |
|         if isinstance(expected, tuple) and expected[-1] is NULL_OR_EMPTY:
 | |
|             if result[-1] in ({}, None):
 | |
|                 expected = (*expected[:-1], result[-1])
 | |
|         self.assertEqual(result, expected)
 | |
| 
 | |
|     def test_fastcall(self):
 | |
|         # Test _PyObject_FastCall()
 | |
| 
 | |
|         for func, args, expected in self.CALLS_POSARGS:
 | |
|             with self.subTest(func=func, args=args):
 | |
|                 result = _testcapi.pyobject_fastcall(func, args)
 | |
|                 self.check_result(result, expected)
 | |
| 
 | |
|                 if not args:
 | |
|                     # args=NULL, nargs=0
 | |
|                     result = _testcapi.pyobject_fastcall(func, None)
 | |
|                     self.check_result(result, expected)
 | |
| 
 | |
|     def test_vectorcall_dict(self):
 | |
|         # Test _PyObject_FastCallDict()
 | |
| 
 | |
|         for func, args, expected in self.CALLS_POSARGS:
 | |
|             with self.subTest(func=func, args=args):
 | |
|                 # kwargs=NULL
 | |
|                 result = _testcapi.pyobject_fastcalldict(func, args, None)
 | |
|                 self.check_result(result, expected)
 | |
| 
 | |
|                 if not args:
 | |
|                     # args=NULL, nargs=0, kwargs=NULL
 | |
|                     result = _testcapi.pyobject_fastcalldict(func, None, None)
 | |
|                     self.check_result(result, expected)
 | |
| 
 | |
|         for func, args, kwargs, expected in self.CALLS_KWARGS:
 | |
|             with self.subTest(func=func, args=args, kwargs=kwargs):
 | |
|                 result = _testcapi.pyobject_fastcalldict(func, args, kwargs)
 | |
|                 self.check_result(result, expected)
 | |
| 
 | |
|     def test_vectorcall(self):
 | |
|         # Test _PyObject_Vectorcall()
 | |
| 
 | |
|         for func, args, expected in self.CALLS_POSARGS:
 | |
|             with self.subTest(func=func, args=args):
 | |
|                 # kwnames=NULL
 | |
|                 result = _testcapi.pyobject_vectorcall(func, args, None)
 | |
|                 self.check_result(result, expected)
 | |
| 
 | |
|                 # kwnames=()
 | |
|                 result = _testcapi.pyobject_vectorcall(func, args, ())
 | |
|                 self.check_result(result, expected)
 | |
| 
 | |
|                 if not args:
 | |
|                     # kwnames=NULL
 | |
|                     result = _testcapi.pyobject_vectorcall(func, None, None)
 | |
|                     self.check_result(result, expected)
 | |
| 
 | |
|                     # kwnames=()
 | |
|                     result = _testcapi.pyobject_vectorcall(func, None, ())
 | |
|                     self.check_result(result, expected)
 | |
| 
 | |
|         for func, args, kwargs, expected in self.CALLS_KWARGS:
 | |
|             with self.subTest(func=func, args=args, kwargs=kwargs):
 | |
|                 kwnames = tuple(kwargs.keys())
 | |
|                 args = args + tuple(kwargs.values())
 | |
|                 result = _testcapi.pyobject_vectorcall(func, args, kwnames)
 | |
|                 self.check_result(result, expected)
 | |
| 
 | |
|     def test_fastcall_clearing_dict(self):
 | |
|         # Test bpo-36907: the point of the test is just checking that this
 | |
|         # does not crash.
 | |
|         class IntWithDict:
 | |
|             __slots__ = ["kwargs"]
 | |
|             def __init__(self, **kwargs):
 | |
|                 self.kwargs = kwargs
 | |
|             def __index__(self):
 | |
|                 self.kwargs.clear()
 | |
|                 gc.collect()
 | |
|                 return 0
 | |
|         x = IntWithDict(dont_inherit=IntWithDict())
 | |
|         # We test the argument handling of "compile" here, the compilation
 | |
|         # itself is not relevant. When we pass flags=x below, x.__index__() is
 | |
|         # called, which changes the keywords dict.
 | |
|         compile("pass", "", "exec", x, **x.kwargs)
 | |
| 
 | |
| 
 | |
| Py_TPFLAGS_HAVE_VECTORCALL = 1 << 11
 | |
| Py_TPFLAGS_METHOD_DESCRIPTOR = 1 << 17
 | |
| 
 | |
| 
 | |
| def testfunction(self):
 | |
|     """some doc"""
 | |
|     return self
 | |
| 
 | |
| 
 | |
| def testfunction_kw(self, *, kw):
 | |
|     """some doc"""
 | |
|     return self
 | |
| 
 | |
| 
 | |
| class TestPEP590(unittest.TestCase):
 | |
| 
 | |
|     def test_method_descriptor_flag(self):
 | |
|         import functools
 | |
|         cached = functools.lru_cache(1)(testfunction)
 | |
| 
 | |
|         self.assertFalse(type(repr).__flags__ & Py_TPFLAGS_METHOD_DESCRIPTOR)
 | |
|         self.assertTrue(type(list.append).__flags__ & Py_TPFLAGS_METHOD_DESCRIPTOR)
 | |
|         self.assertTrue(type(list.__add__).__flags__ & Py_TPFLAGS_METHOD_DESCRIPTOR)
 | |
|         self.assertTrue(type(testfunction).__flags__ & Py_TPFLAGS_METHOD_DESCRIPTOR)
 | |
|         self.assertTrue(type(cached).__flags__ & Py_TPFLAGS_METHOD_DESCRIPTOR)
 | |
| 
 | |
|         self.assertTrue(_testcapi.MethodDescriptorBase.__flags__ & Py_TPFLAGS_METHOD_DESCRIPTOR)
 | |
|         self.assertTrue(_testcapi.MethodDescriptorDerived.__flags__ & Py_TPFLAGS_METHOD_DESCRIPTOR)
 | |
|         self.assertFalse(_testcapi.MethodDescriptorNopGet.__flags__ & Py_TPFLAGS_METHOD_DESCRIPTOR)
 | |
| 
 | |
|         # Heap type should not inherit Py_TPFLAGS_METHOD_DESCRIPTOR
 | |
|         class MethodDescriptorHeap(_testcapi.MethodDescriptorBase):
 | |
|             pass
 | |
|         self.assertFalse(MethodDescriptorHeap.__flags__ & Py_TPFLAGS_METHOD_DESCRIPTOR)
 | |
| 
 | |
|     def test_vectorcall_flag(self):
 | |
|         self.assertTrue(_testcapi.MethodDescriptorBase.__flags__ & Py_TPFLAGS_HAVE_VECTORCALL)
 | |
|         self.assertTrue(_testcapi.MethodDescriptorDerived.__flags__ & Py_TPFLAGS_HAVE_VECTORCALL)
 | |
|         self.assertFalse(_testcapi.MethodDescriptorNopGet.__flags__ & Py_TPFLAGS_HAVE_VECTORCALL)
 | |
|         self.assertTrue(_testcapi.MethodDescriptor2.__flags__ & Py_TPFLAGS_HAVE_VECTORCALL)
 | |
| 
 | |
|         # Heap type should not inherit Py_TPFLAGS_HAVE_VECTORCALL
 | |
|         class MethodDescriptorHeap(_testcapi.MethodDescriptorBase):
 | |
|             pass
 | |
|         self.assertFalse(MethodDescriptorHeap.__flags__ & Py_TPFLAGS_HAVE_VECTORCALL)
 | |
| 
 | |
|     def test_vectorcall_override(self):
 | |
|         # Check that tp_call can correctly override vectorcall.
 | |
|         # MethodDescriptorNopGet implements tp_call but it inherits from
 | |
|         # MethodDescriptorBase, which implements vectorcall. Since
 | |
|         # MethodDescriptorNopGet returns the args tuple when called, we check
 | |
|         # additionally that no new tuple is created for this call.
 | |
|         args = tuple(range(5))
 | |
|         f = _testcapi.MethodDescriptorNopGet()
 | |
|         self.assertIs(f(*args), args)
 | |
| 
 | |
|     def test_vectorcall(self):
 | |
|         # Test a bunch of different ways to call objects:
 | |
|         # 1. vectorcall using PyVectorcall_Call()
 | |
|         #   (only for objects that support vectorcall directly)
 | |
|         # 2. normal call
 | |
|         # 3. vectorcall using _PyObject_Vectorcall()
 | |
|         # 4. call as bound method
 | |
|         # 5. call using functools.partial
 | |
| 
 | |
|         # A list of (function, args, kwargs, result) calls to test
 | |
|         calls = [(len, (range(42),), {}, 42),
 | |
|                  (list.append, ([], 0), {}, None),
 | |
|                  ([].append, (0,), {}, None),
 | |
|                  (sum, ([36],), {"start":6}, 42),
 | |
|                  (testfunction, (42,), {}, 42),
 | |
|                  (testfunction_kw, (42,), {"kw":None}, 42),
 | |
|                  (_testcapi.MethodDescriptorBase(), (0,), {}, True),
 | |
|                  (_testcapi.MethodDescriptorDerived(), (0,), {}, True),
 | |
|                  (_testcapi.MethodDescriptor2(), (0,), {}, False)]
 | |
| 
 | |
|         from _testcapi import pyobject_vectorcall, pyvectorcall_call
 | |
|         from types import MethodType
 | |
|         from functools import partial
 | |
| 
 | |
|         def vectorcall(func, args, kwargs):
 | |
|             args = *args, *kwargs.values()
 | |
|             kwnames = tuple(kwargs)
 | |
|             return pyobject_vectorcall(func, args, kwnames)
 | |
| 
 | |
|         for (func, args, kwargs, expected) in calls:
 | |
|             with self.subTest(str(func)):
 | |
|                 if not kwargs:
 | |
|                     self.assertEqual(expected, pyvectorcall_call(func, args))
 | |
|                 self.assertEqual(expected, pyvectorcall_call(func, args, kwargs))
 | |
| 
 | |
|         # Add derived classes (which do not support vectorcall directly,
 | |
|         # but do support all other ways of calling).
 | |
| 
 | |
|         class MethodDescriptorHeap(_testcapi.MethodDescriptorBase):
 | |
|             pass
 | |
| 
 | |
|         class MethodDescriptorOverridden(_testcapi.MethodDescriptorBase):
 | |
|             def __call__(self, n):
 | |
|                 return 'new'
 | |
| 
 | |
|         class SuperBase:
 | |
|             def __call__(self, *args):
 | |
|                 return super().__call__(*args)
 | |
| 
 | |
|         class MethodDescriptorSuper(SuperBase, _testcapi.MethodDescriptorBase):
 | |
|             def __call__(self, *args):
 | |
|                 return super().__call__(*args)
 | |
| 
 | |
|         calls += [
 | |
|             (dict.update, ({},), {"key":True}, None),
 | |
|             ({}.update, ({},), {"key":True}, None),
 | |
|             (MethodDescriptorHeap(), (0,), {}, True),
 | |
|             (MethodDescriptorOverridden(), (0,), {}, 'new'),
 | |
|             (MethodDescriptorSuper(), (0,), {}, True),
 | |
|         ]
 | |
| 
 | |
|         for (func, args, kwargs, expected) in calls:
 | |
|             with self.subTest(str(func)):
 | |
|                 args1 = args[1:]
 | |
|                 meth = MethodType(func, args[0])
 | |
|                 wrapped = partial(func)
 | |
|                 if not kwargs:
 | |
|                     self.assertEqual(expected, func(*args))
 | |
|                     self.assertEqual(expected, pyobject_vectorcall(func, args, None))
 | |
|                     self.assertEqual(expected, meth(*args1))
 | |
|                     self.assertEqual(expected, wrapped(*args))
 | |
|                 self.assertEqual(expected, func(*args, **kwargs))
 | |
|                 self.assertEqual(expected, vectorcall(func, args, kwargs))
 | |
|                 self.assertEqual(expected, meth(*args1, **kwargs))
 | |
|                 self.assertEqual(expected, wrapped(*args, **kwargs))
 | |
| 
 | |
| 
 | |
| if __name__ == "__main__":
 | |
|     unittest.main()
 |