pythongh-105751, test_ctypes: Remove disabled tests (python#105826)

* The following tests were disabled since the initial ctypes commit
  in 2006, commit babddfc:

  * Callbacks.test_char_p()
  * DeletePointerTestCase.test_X()
  * NumberTestCase.test_perf()
  * StructureTestCase.test_subclass_creation()
  * Tests.test_X() of test_byteswap

* NumberTestCase.test_bool_from_address() was disabled in 2007 by
  commit 5dc4fe0.
* Remove check_perf() and run_test() of test_numbers.

Lib/test/test_ctypes/test_byteswap.py

@@ -25,14 +25,6 @@ def bin(s):
 # For Structures and Unions, these types are created on demand.
 
 class Test(unittest.TestCase):
- @unittest.skip('test disabled')
- def test_X(self):
- print(sys.byteorder, file=sys.stderr)
- for i in range(32):
- bits = BITS()
- setattr(bits, "i%s" % i, 1)
- dump(bits)
-
  def test_slots(self):
  class BigPoint(BigEndianStructure):
  __slots__ = ()

Lib/test/test_ctypes/test_callbacks.py

@@ -8,7 +8,7 @@
 from _ctypes import CTYPES_MAX_ARGCOUNT
 from ctypes import (CDLL, cdll, Structure, CFUNCTYPE,
  ArgumentError, POINTER, sizeof,
- c_byte, c_ubyte, c_char, c_char_p,
+ c_byte, c_ubyte, c_char,
  c_short, c_ushort, c_int, c_uint,
  c_long, c_longlong, c_ulonglong, c_ulong,
  c_float, c_double, c_longdouble, py_object)
@@ -92,14 +92,6 @@ def test_char(self):
  self.check_type(c_char, b"x")
  self.check_type(c_char, b"a")
 
- # disabled: would now (correctly) raise a RuntimeWarning about
- # a memory leak. A callback function cannot return a non-integral
- # C type without causing a memory leak.
- @unittest.skip('test disabled')
- def test_char_p(self):
- self.check_type(c_char_p, "abc")
- self.check_type(c_char_p, "def")
-
  def test_pyobject(self):
  o = ()
  for o in (), [], object():

Lib/test/test_ctypes/test_keeprefs.py

@@ -1,5 +1,3 @@
-import gc
-import sys
 import unittest
 from ctypes import (Structure, POINTER, pointer, _pointer_type_cache,
  c_char_p, c_int)
@@ -101,32 +99,6 @@ def test_p_cint(self):
  self.assertEqual(x._objects, {'1': i})
 
 
-class DeletePointerTestCase(unittest.TestCase):
- @unittest.skip('test disabled')
- def test_X(self):
- class X(Structure):
- _fields_ = [("p", POINTER(c_char_p))]
- x = X()
- i = c_char_p("abc def")
- print("2?", sys.getrefcount(i))
- x.p = pointer(i)
- print("3?", sys.getrefcount(i))
- for i in range(320):
- c_int(99)
- x.p[0]
- print(x.p[0])
- gc.collect()
- for i in range(320):
- c_int(99)
- x.p[0]
- print(x.p[0])
- print(x.p.contents)
-
- x.p[0] = "spam spam"
- print("+" * 42)
- print(x._objects)
-
-
 class PointerToStructure(unittest.TestCase):
  def test(self):
  class POINT(Structure):

Lib/test/test_ctypes/test_numbers.py

@@ -3,7 +3,7 @@
 import sys
 import unittest
 from operator import truth
-from ctypes import (byref, sizeof, alignment, _SimpleCData,
+from ctypes import (byref, sizeof, alignment,
  c_char, c_byte, c_ubyte, c_short, c_ushort, c_int, c_uint,
  c_long, c_ulong, c_longlong, c_ulonglong,
  c_float, c_double, c_longdouble, c_bool)
@@ -70,14 +70,6 @@ def test_typeerror(self):
  self.assertRaises(TypeError, t, "")
  self.assertRaises(TypeError, t, None)
 
- @unittest.skip('test disabled')
- def test_valid_ranges(self):
- # invalid values of the correct type
- # raise ValueError (not OverflowError)
- for t, (l, h) in zip(unsigned_types, unsigned_ranges):
- self.assertRaises(ValueError, t, l-1)
- self.assertRaises(ValueError, t, h+1)
-
  def test_from_param(self):
  # the from_param class method attribute always
  # returns PyCArgObject instances
@@ -188,17 +180,6 @@ def test_char_from_address(self):
  a[0] = ord('?')
  self.assertEqual(v.value, b'?')
 
- # array does not support c_bool / 't'
- @unittest.skip('test disabled')
- def test_bool_from_address(self):
- a = array.array(c_bool._type_, [True])
- v = t.from_address(a.buffer_info()[0])
- self.assertEqual(v.value, a[0])
- self.assertEqual(type(v) is t)
- a[0] = False
- self.assertEqual(v.value, a[0])
- self.assertEqual(type(v) is t)
-
  def test_init(self):
  # c_int() can be initialized from Python's int, and c_int.
  # Not from c_long or so, which seems strange, abc should
@@ -214,63 +195,6 @@ def test_float_overflow(self):
  if (hasattr(t, "__ctype_le__")):
  self.assertRaises(OverflowError, t.__ctype_le__, big_int)
 
- @unittest.skip('test disabled')
- def test_perf(self):
- check_perf()
-
-
-class c_int_S(_SimpleCData):
- _type_ = "i"
- __slots__ = []
-
-
-def run_test(rep, msg, func, arg=None):
- items = range(rep)
- from time import perf_counter as clock
- if arg is not None:
- start = clock()
- for i in items:
- func(arg); func(arg); func(arg); func(arg); func(arg)
- stop = clock()
- else:
- start = clock()
- for i in items:
- func(); func(); func(); func(); func()
- stop = clock()
- print("%15s: %.2f us" % (msg, ((stop-start)*1e6/5/rep)))
-
-
-def check_perf():
- # Construct 5 objects
-
- REP = 200000
-
- run_test(REP, "int()", int)
- run_test(REP, "int(999)", int)
- run_test(REP, "c_int()", c_int)
- run_test(REP, "c_int(999)", c_int)
- run_test(REP, "c_int_S()", c_int_S)
- run_test(REP, "c_int_S(999)", c_int_S)
-
-# Python 2.3 -OO, win2k, P4 700 MHz:
-#
-# int(): 0.87 us
-# int(999): 0.87 us
-# c_int(): 3.35 us
-# c_int(999): 3.34 us
-# c_int_S(): 3.23 us
-# c_int_S(999): 3.24 us
-
-# Python 2.2 -OO, win2k, P4 700 MHz:
-#
-# int(): 0.89 us
-# int(999): 0.89 us
-# c_int(): 9.99 us
-# c_int(999): 10.02 us
-# c_int_S(): 9.87 us
-# c_int_S(999): 9.85 us
-
 
 if __name__ == '__main__':
-## check_perf()
  unittest.main()

Lib/test/test_ctypes/test_structures.py

@@ -357,15 +357,6 @@ def get_except(self, func, *args):
  except Exception as detail:
  return detail.__class__, str(detail)
 
- @unittest.skip('test disabled')
- def test_subclass_creation(self):
- meta = type(Structure)
- # same as 'class X(Structure): pass'
- # fails, since we need either a _fields_ or a _abstract_ attribute
- cls, msg = self.get_except(meta, "X", (Structure,), {})
- self.assertEqual((cls, msg),
- (AttributeError, "class must define a '_fields_' attribute"))
-
  def test_abstract_class(self):
  class X(Structure):
  _abstract_ = "something"