Author: Ronan Lamy <ronan.l...@gmail.com>
Branch: cleanup-test_lib_pypy
Changeset: r95452:007da6e72200
Date: 2018-12-11 20:46 +0000
http://bitbucket.org/pypy/pypy/changeset/007da6e72200/
Log: Convert some test methods to functions
diff --git a/pypy/module/test_lib_pypy/ctypes_tests/test_anon.py
b/pypy/module/test_lib_pypy/ctypes_tests/test_anon.py
--- a/pypy/module/test_lib_pypy/ctypes_tests/test_anon.py
+++ b/pypy/module/test_lib_pypy/ctypes_tests/test_anon.py
@@ -1,56 +1,54 @@
import pytest
from ctypes import *
-from .support import BaseCTypesTestChecker
-class TestAnon(BaseCTypesTestChecker):
- def test_nested(self):
- class ANON_S(Structure):
- _fields_ = [("a", c_int)]
+def test_nested():
+ class ANON_S(Structure):
+ _fields_ = [("a", c_int)]
- class ANON_U(Union):
- _fields_ = [("_", ANON_S),
- ("b", c_int)]
- _anonymous_ = ["_"]
+ class ANON_U(Union):
+ _fields_ = [("_", ANON_S),
+ ("b", c_int)]
+ _anonymous_ = ["_"]
- class Y(Structure):
- _fields_ = [("x", c_int),
- ("_", ANON_U),
- ("y", c_int)]
- _anonymous_ = ["_"]
+ class Y(Structure):
+ _fields_ = [("x", c_int),
+ ("_", ANON_U),
+ ("y", c_int)]
+ _anonymous_ = ["_"]
- assert Y.x.offset == 0
- assert Y.a.offset == sizeof(c_int)
- assert Y.b.offset == sizeof(c_int)
- assert Y._.offset == sizeof(c_int)
- assert Y.y.offset == sizeof(c_int) * 2
+ assert Y.x.offset == 0
+ assert Y.a.offset == sizeof(c_int)
+ assert Y.b.offset == sizeof(c_int)
+ assert Y._.offset == sizeof(c_int)
+ assert Y.y.offset == sizeof(c_int) * 2
- assert Y._names_ == ['x', 'a', 'b', 'y']
+ assert Y._names_ == ['x', 'a', 'b', 'y']
- def test_anonymous_fields_on_instance(self):
- # this is about the *instance-level* access of anonymous fields,
- # which you'd guess is the most common, but used not to work
- # (issue #2230)
+def test_anonymous_fields_on_instance():
+ # this is about the *instance-level* access of anonymous fields,
+ # which you'd guess is the most common, but used not to work
+ # (issue #2230)
- class B(Structure):
- _fields_ = [("x", c_int), ("y", c_int), ("z", c_int)]
- class A(Structure):
- _anonymous_ = ["b"]
- _fields_ = [("b", B)]
+ class B(Structure):
+ _fields_ = [("x", c_int), ("y", c_int), ("z", c_int)]
+ class A(Structure):
+ _anonymous_ = ["b"]
+ _fields_ = [("b", B)]
- a = A()
- a.x = 5
- assert a.x == 5
- assert a.b.x == 5
- a.b.x += 1
- assert a.x == 6
+ a = A()
+ a.x = 5
+ assert a.x == 5
+ assert a.b.x == 5
+ a.b.x += 1
+ assert a.x == 6
- class C(Structure):
- _anonymous_ = ["a"]
- _fields_ = [("v", c_int), ("a", A)]
+ class C(Structure):
+ _anonymous_ = ["a"]
+ _fields_ = [("v", c_int), ("a", A)]
- c = C()
- c.v = 3
- c.y = -8
- assert c.v == 3
- assert c.y == c.a.y == c.a.b.y == -8
- assert not hasattr(c, 'b')
+ c = C()
+ c.v = 3
+ c.y = -8
+ assert c.v == 3
+ assert c.y == c.a.y == c.a.b.y == -8
+ assert not hasattr(c, 'b')
diff --git a/pypy/module/test_lib_pypy/ctypes_tests/test_array.py
b/pypy/module/test_lib_pypy/ctypes_tests/test_array.py
--- a/pypy/module/test_lib_pypy/ctypes_tests/test_array.py
+++ b/pypy/module/test_lib_pypy/ctypes_tests/test_array.py
@@ -1,67 +1,64 @@
import pytest
from ctypes import *
-from .support import BaseCTypesTestChecker
-class TestArray(BaseCTypesTestChecker):
- def test_slice(self):
- values = range(5)
- numarray = c_int * 5
+def test_slice():
+ values = range(5)
+ numarray = c_int * 5
- na = numarray(*(c_int(x) for x in values))
+ na = numarray(*(c_int(x) for x in values))
- assert list(na[0:0]) == []
- assert list(na[:]) == values
- assert list(na[:10]) == values
+ assert list(na[0:0]) == []
+ assert list(na[:]) == values
+ assert list(na[:10]) == values
- def test_init_again(self):
- sz = (c_char * 3)()
- addr1 = addressof(sz)
- sz.__init__(*"foo")
- addr2 = addressof(sz)
- assert addr1 == addr2
+def test_init_again():
+ sz = (c_char * 3)()
+ addr1 = addressof(sz)
+ sz.__init__(*"foo")
+ addr2 = addressof(sz)
+ assert addr1 == addr2
-class TestSophisticatedThings(BaseCTypesTestChecker):
- def test_array_of_structures(self):
- class X(Structure):
- _fields_ = [('x', c_int), ('y', c_int)]
+def test_array_of_structures():
+ class X(Structure):
+ _fields_ = [('x', c_int), ('y', c_int)]
- Y = X * 2
- y = Y()
- x = X()
- x.y = 3
- y[1] = x
- assert y[1].y == 3
+ Y = X * 2
+ y = Y()
+ x = X()
+ x.y = 3
+ y[1] = x
+ assert y[1].y == 3
- def test_output_simple(self):
- A = c_char * 10
- TP = POINTER(A)
- x = TP(A())
- assert x[0] != ''
+def test_output_simple():
+ A = c_char * 10
+ TP = POINTER(A)
+ x = TP(A())
+ assert x[0] != ''
- A = c_wchar * 10
- TP = POINTER(A)
- x = TP(A())
- assert x[0] != ''
+ A = c_wchar * 10
+ TP = POINTER(A)
+ x = TP(A())
+ assert x[0] != ''
- def test_output_simple_array(self):
- A = c_char * 10
- AA = A * 10
- aa = AA()
- assert aa[0] != ''
+def test_output_simple_array():
+ A = c_char * 10
+ AA = A * 10
+ aa = AA()
+ assert aa[0] != ''
- def test_output_complex_test(self):
- class Car(Structure):
- _fields_ = [("brand", c_char * 10),
- ("speed", c_float),
- ("owner", c_char * 10)]
+def test_output_complex_test():
+ class Car(Structure):
+ _fields_ = [("brand", c_char * 10),
+ ("speed", c_float),
+ ("owner", c_char * 10)]
- assert isinstance(Car("abcdefghi", 42.0, "12345").brand, bytes)
- assert Car("abcdefghi", 42.0, "12345").brand == "abcdefghi"
- assert Car("abcdefghio", 42.0, "12345").brand == "abcdefghio"
- with pytest.raises(ValueError):
- Car("abcdefghiop", 42.0, "12345")
+ assert isinstance(Car("abcdefghi", 42.0, "12345").brand, bytes)
+ assert Car("abcdefghi", 42.0, "12345").brand == "abcdefghi"
+ assert Car("abcdefghio", 42.0, "12345").brand == "abcdefghio"
+ with pytest.raises(ValueError):
+ Car("abcdefghiop", 42.0, "12345")
- A = Car._fields_[2][1]
- TP = POINTER(A)
- x = TP(A())
- assert x[0] != ''
+ A = Car._fields_[2][1]
+ TP = POINTER(A)
+ x = TP(A())
+ assert x[0] != ''
diff --git a/pypy/module/test_lib_pypy/ctypes_tests/test_base.py
b/pypy/module/test_lib_pypy/ctypes_tests/test_base.py
--- a/pypy/module/test_lib_pypy/ctypes_tests/test_base.py
+++ b/pypy/module/test_lib_pypy/ctypes_tests/test_base.py
@@ -1,26 +1,23 @@
-from .support import WhiteBoxTests
-
from ctypes import *
# WhiteBoxTests
-class TestCTypesBase(WhiteBoxTests):
- def test_pointer(self):
- p = pointer(pointer(c_int(2)))
- x = p[0]
- assert x._base is p
+def test_pointer():
+ p = pointer(pointer(c_int(2)))
+ x = p[0]
+ assert x._base is p
- def test_structure(self):
- class X(Structure):
- _fields_ = [('x', POINTER(c_int)),
- ('y', POINTER(c_int))]
+def test_structure():
+ class X(Structure):
+ _fields_ = [('x', POINTER(c_int)),
+ ('y', POINTER(c_int))]
- x = X()
- assert x.y._base is x
- assert x.y._index == 1
+ x = X()
+ assert x.y._base is x
+ assert x.y._index == 1
- def test_array(self):
- X = POINTER(c_int) * 24
- x = X()
- assert x[16]._base is x
- assert x[16]._index == 16
+def test_array():
+ X = POINTER(c_int) * 24
+ x = X()
+ assert x[16]._base is x
+ assert x[16]._index == 16
diff --git a/pypy/module/test_lib_pypy/ctypes_tests/test_bitfields.py
b/pypy/module/test_lib_pypy/ctypes_tests/test_bitfields.py
--- a/pypy/module/test_lib_pypy/ctypes_tests/test_bitfields.py
+++ b/pypy/module/test_lib_pypy/ctypes_tests/test_bitfields.py
@@ -2,21 +2,18 @@
from ctypes import *
-class TestBitField:
- def test_set_fields_attr(self):
- class A(Structure):
- pass
- A._fields_ = [("a", c_byte),
- ("b", c_ubyte)]
+def test_set_fields_attr():
+ class A(Structure):
+ pass
+ A._fields_ = [("a", c_byte), ("b", c_ubyte)]
- def test_set_fields_attr_bitfields(self):
- class A(Structure):
- pass
- A._fields_ = [("a", POINTER(A)),
- ("b", c_ubyte, 4)]
+def test_set_fields_attr_bitfields():
+ class A(Structure):
+ pass
+ A._fields_ = [("a", POINTER(A)), ("b", c_ubyte, 4)]
- def test_set_fields_cycle_fails(self):
- class A(Structure):
- pass
- with pytest.raises(AttributeError):
- A._fields_ = [("a", A)]
+def test_set_fields_cycle_fails():
+ class A(Structure):
+ pass
+ with pytest.raises(AttributeError):
+ A._fields_ = [("a", A)]
diff --git a/pypy/module/test_lib_pypy/ctypes_tests/test_buffers.py
b/pypy/module/test_lib_pypy/ctypes_tests/test_buffers.py
--- a/pypy/module/test_lib_pypy/ctypes_tests/test_buffers.py
+++ b/pypy/module/test_lib_pypy/ctypes_tests/test_buffers.py
@@ -1,41 +1,38 @@
from ctypes import *
-from .support import BaseCTypesTestChecker
-class TestStringBuffer(BaseCTypesTestChecker):
+def test_buffer():
+ b = create_string_buffer(32)
+ assert len(b) == 32
+ assert sizeof(b) == 32 * sizeof(c_char)
+ assert type(b[0]) is str
- def test_buffer(self):
- b = create_string_buffer(32)
- assert len(b) == 32
- assert sizeof(b) == 32 * sizeof(c_char)
- assert type(b[0]) is str
+ b = create_string_buffer(33L)
+ assert len(b) == 33
+ assert sizeof(b) == 33 * sizeof(c_char)
+ assert type(b[0]) is str
- b = create_string_buffer(33L)
- assert len(b) == 33
- assert sizeof(b) == 33 * sizeof(c_char)
- assert type(b[0]) is str
+ b = create_string_buffer("abc")
+ assert len(b) == 4 # trailing nul char
+ assert sizeof(b) == 4 * sizeof(c_char)
+ assert type(b[0]) is str
+ assert b[0] == "a"
+ assert b[:] == "abc\0"
- b = create_string_buffer("abc")
- assert len(b) == 4 # trailing nul char
- assert sizeof(b) == 4 * sizeof(c_char)
- assert type(b[0]) is str
- assert b[0] == "a"
- assert b[:] == "abc\0"
+def test_from_buffer():
+ b1 = bytearray("abcde")
+ b = (c_char * 5).from_buffer(b1)
+ assert b[2] == "c"
+ #
+ b1 = bytearray("abcd")
+ b = c_int.from_buffer(b1)
+ assert b.value in (1684234849, # little endian
+ 1633837924) # big endian
- def test_from_buffer(self):
- b1 = bytearray("abcde")
- b = (c_char * 5).from_buffer(b1)
- assert b[2] == "c"
- #
- b1 = bytearray("abcd")
- b = c_int.from_buffer(b1)
- assert b.value in (1684234849, # little endian
- 1633837924) # big endian
-
- def test_from_buffer_keepalive(self):
- # Issue #2878
- b1 = bytearray("ab")
- array = (c_uint16 * 32)()
- array[6] = c_uint16.from_buffer(b1)
- # this is also what we get on CPython. I don't think it makes
- # sense because the array contains just a copy of the number.
- assert array._objects == {'6': b1}
+def test_from_buffer_keepalive():
+ # Issue #2878
+ b1 = bytearray("ab")
+ array = (c_uint16 * 32)()
+ array[6] = c_uint16.from_buffer(b1)
+ # this is also what we get on CPython. I don't think it makes
+ # sense because the array contains just a copy of the number.
+ assert array._objects == {'6': b1}
diff --git a/pypy/module/test_lib_pypy/ctypes_tests/test_callbacks.py
b/pypy/module/test_lib_pypy/ctypes_tests/test_callbacks.py
--- a/pypy/module/test_lib_pypy/ctypes_tests/test_callbacks.py
+++ b/pypy/module/test_lib_pypy/ctypes_tests/test_callbacks.py
@@ -5,10 +5,6 @@
class TestCallbacks(BaseCTypesTestChecker):
functype = CFUNCTYPE
-## def tearDown(self):
-## import gc
-## gc.collect()
-
def callback(self, *args):
self.got_args = args
return args[-1]
diff --git a/pypy/module/test_lib_pypy/ctypes_tests/test_cast.py
b/pypy/module/test_lib_pypy/ctypes_tests/test_cast.py
--- a/pypy/module/test_lib_pypy/ctypes_tests/test_cast.py
+++ b/pypy/module/test_lib_pypy/ctypes_tests/test_cast.py
@@ -1,31 +1,30 @@
+import pytest
+
from ctypes import *
-import sys, py
-from .support import BaseCTypesTestChecker
-class TestCast(BaseCTypesTestChecker):
+def test_cast_functype(dll):
+ # make sure we can cast function type
+ my_sqrt = dll.my_sqrt
+ saved_objects = my_sqrt._objects.copy()
+ sqrt = cast(cast(my_sqrt, c_void_p), CFUNCTYPE(c_double, c_double))
+ assert sqrt(4.0) == 2.0
+ assert not cast(0, CFUNCTYPE(c_int))
+ #
+ assert sqrt._objects is my_sqrt._objects # on CPython too
+ my_sqrt._objects.clear()
+ my_sqrt._objects.update(saved_objects)
- def test_cast_functype(self, dll):
- # make sure we can cast function type
- my_sqrt = dll.my_sqrt
- saved_objects = my_sqrt._objects.copy()
- sqrt = cast(cast(my_sqrt, c_void_p), CFUNCTYPE(c_double, c_double))
- assert sqrt(4.0) == 2.0
- assert not cast(0, CFUNCTYPE(c_int))
- #
- assert sqrt._objects is my_sqrt._objects # on CPython too
- my_sqrt._objects.clear()
- my_sqrt._objects.update(saved_objects)
+def test_cast_argumenterror():
+ param = c_uint(42)
+ with pytest.raises(ArgumentError):
+ cast(param, c_void_p)
- def test_cast_argumenterror(self):
- param = c_uint(42)
- py.test.raises(ArgumentError, "cast(param, c_void_p)")
-
- def test_c_bool(self):
- x = c_bool(42)
- assert x.value is True
- x = c_bool(0.0)
- assert x.value is False
- x = c_bool("")
- assert x.value is False
- x = c_bool(['yadda'])
- assert x.value is True
+def test_c_bool():
+ x = c_bool(42)
+ assert x.value is True
+ x = c_bool(0.0)
+ assert x.value is False
+ x = c_bool("")
+ assert x.value is False
+ x = c_bool(['yadda'])
+ assert x.value is True
diff --git a/pypy/module/test_lib_pypy/ctypes_tests/test_errno.py
b/pypy/module/test_lib_pypy/ctypes_tests/test_errno.py
--- a/pypy/module/test_lib_pypy/ctypes_tests/test_errno.py
+++ b/pypy/module/test_lib_pypy/ctypes_tests/test_errno.py
@@ -3,19 +3,17 @@
import ctypes
_rawffi = pytest.importorskip('_rawffi') # PyPy-only
-class TestErrno:
+def test_errno_saved_and_restored():
+ def check():
+ assert _rawffi.get_errno() == 42
+ assert ctypes.get_errno() == old
+ check.free_temp_buffers = lambda *args: None
+ f = ctypes._CFuncPtr()
+ old = _rawffi.get_errno()
+ f._flags_ = _rawffi.FUNCFLAG_USE_ERRNO
+ ctypes.set_errno(42)
+ f._call_funcptr(check)
+ assert _rawffi.get_errno() == old
+ ctypes.set_errno(0)
- def test_errno_saved_and_restored(self):
- def check():
- assert _rawffi.get_errno() == 42
- assert ctypes.get_errno() == old
- check.free_temp_buffers = lambda *args: None
- f = ctypes._CFuncPtr()
- old = _rawffi.get_errno()
- f._flags_ = _rawffi.FUNCFLAG_USE_ERRNO
- ctypes.set_errno(42)
- f._call_funcptr(check)
- assert _rawffi.get_errno() == old
- ctypes.set_errno(0)
-
- # see also test_functions.test_errno
+# see also test_functions.test_errno
diff --git a/pypy/module/test_lib_pypy/ctypes_tests/test_extra.py
b/pypy/module/test_lib_pypy/ctypes_tests/test_extra.py
--- a/pypy/module/test_lib_pypy/ctypes_tests/test_extra.py
+++ b/pypy/module/test_lib_pypy/ctypes_tests/test_extra.py
@@ -5,241 +5,239 @@
import py
from ctypes import *
-from .support import BaseCTypesTestChecker
-class TestExtra(BaseCTypesTestChecker):
- def test_primitive_pointer(self):
- x = c_int(5)
- assert x.value == 5
- x.value = 6
- assert x.value == 6
+def test_primitive_pointer():
+ x = c_int(5)
+ assert x.value == 5
+ x.value = 6
+ assert x.value == 6
- p = pointer(x) # p ---> x = 6
- assert isinstance(p.contents, c_int)
- p.contents.value += 1
- assert x.value == 7 # p ---> x = 7
+ p = pointer(x) # p ---> x = 6
+ assert isinstance(p.contents, c_int)
+ p.contents.value += 1
+ assert x.value == 7 # p ---> x = 7
- y = c_int(12)
- p.contents = y # p ---> y = 12
- p.contents.value += 2 # p ---> y = 14
- assert y.value == 14
- assert x.value == 7
+ y = c_int(12)
+ p.contents = y # p ---> y = 12
+ p.contents.value += 2 # p ---> y = 14
+ assert y.value == 14
+ assert x.value == 7
- pp = pointer(p) # pp ---> p ---> y = 14
- pp.contents.contents = x # pp ---> p ---> x = 7
- p.contents.value += 2 # pp ---> p ---> x = 9
- assert x.value == 9
+ pp = pointer(p) # pp ---> p ---> y = 14
+ pp.contents.contents = x # pp ---> p ---> x = 7
+ p.contents.value += 2 # pp ---> p ---> x = 9
+ assert x.value == 9
- assert isinstance(p[0], int)
- p[0] += 1 # pp ---> p ---> x = 10
- assert x.value == 10
- z = c_int(86)
- p[0] = z # pp ---> p ---> x = 86
(not z!)
- assert x.value == 86
- z.value = 84
- assert x.value == 86
+ assert isinstance(p[0], int)
+ p[0] += 1 # pp ---> p ---> x = 10
+ assert x.value == 10
+ z = c_int(86)
+ p[0] = z # pp ---> p ---> x = 86 (not z!)
+ assert x.value == 86
+ z.value = 84
+ assert x.value == 86
- assert isinstance(pp[0], POINTER(c_int))
- assert pp[0].contents.value == x.value == 86
- pp[0].contents = z # pp ---> p ---> z = 84
- assert p.contents.value == z.value == 84
+ assert isinstance(pp[0], POINTER(c_int))
+ assert pp[0].contents.value == x.value == 86
+ pp[0].contents = z # pp ---> p ---> z = 84
+ assert p.contents.value == z.value == 84
- ## *** the rest is commented out because it should work but occasionally
- ## *** trigger a ctypes bug (SourceForge bug #1467852). ***
- ## q = pointer(y)
- ## pp[0] = q # pp ---> p ---> y = 14
- ## assert y.value == 14 # (^^^ not q! )
- ## assert p.contents.value == 14
- ## assert pp.contents.contents.value == 14
- ## q.contents = x
- ## assert pp.contents.contents.value == 14
+## *** the rest is commented out because it should work but occasionally
+## *** trigger a ctypes bug (SourceForge bug #1467852). ***
+## q = pointer(y)
+## pp[0] = q # pp ---> p ---> y = 14
+## assert y.value == 14 # (^^^ not q! )
+## assert p.contents.value == 14
+## assert pp.contents.contents.value == 14
+## q.contents = x
+## assert pp.contents.contents.value == 14
- def test_char_p(self):
- x = c_char_p("hello\x00world")
- assert x.value == "hello"
- x.value = "world"
- assert x.value == "world"
+def test_char_p():
+ x = c_char_p("hello\x00world")
+ assert x.value == "hello"
+ x.value = "world"
+ assert x.value == "world"
- p = pointer(x)
- assert p[0] == x.value == "world"
- p[0] = "other"
- assert x.value == p.contents.value == p[0] == "other"
+ p = pointer(x)
+ assert p[0] == x.value == "world"
+ p[0] = "other"
+ assert x.value == p.contents.value == p[0] == "other"
- myarray = (c_char_p * 10)()
- myarray[7] = "hello"
- assert isinstance(myarray[7], str)
- assert myarray[7] == "hello"
+ myarray = (c_char_p * 10)()
+ myarray[7] = "hello"
+ assert isinstance(myarray[7], str)
+ assert myarray[7] == "hello"
- def test_struct(self):
- class tagpoint(Structure):
- _fields_ = [('x', c_int),
- ('p', POINTER(c_short))]
+def test_struct():
+ class tagpoint(Structure):
+ _fields_ = [('x', c_int),
+ ('p', POINTER(c_short))]
- y = c_short(123)
- z = c_short(-33)
- s = tagpoint()
- s.p.contents = z
- assert s.p.contents.value == -33
- s.p = pointer(y)
- assert s.p.contents.value == 123
- s.p.contents.value = 124
- assert y.value == 124
+ y = c_short(123)
+ z = c_short(-33)
+ s = tagpoint()
+ s.p.contents = z
+ assert s.p.contents.value == -33
+ s.p = pointer(y)
+ assert s.p.contents.value == 123
+ s.p.contents.value = 124
+ assert y.value == 124
- s = tagpoint(x=12)
- assert s.x == 12
- s = tagpoint(17, p=pointer(z))
- assert s.x == 17
- assert s.p.contents.value == -33
+ s = tagpoint(x=12)
+ assert s.x == 12
+ s = tagpoint(17, p=pointer(z))
+ assert s.x == 17
+ assert s.p.contents.value == -33
- def test_ptr_array(self):
- a = (POINTER(c_ushort) * 5)()
- x = c_ushort(52)
- y = c_ushort(1000)
+def test_ptr_array():
+ a = (POINTER(c_ushort) * 5)()
+ x = c_ushort(52)
+ y = c_ushort(1000)
- a[2] = pointer(x)
- assert a[2].contents.value == 52
- a[2].contents.value += 1
- assert x.value == 53
+ a[2] = pointer(x)
+ assert a[2].contents.value == 52
+ a[2].contents.value += 1
+ assert x.value == 53
- a[3].contents = y
- assert a[3].contents.value == 1000
- a[3].contents.value += 1
- assert y.value == 1001
+ a[3].contents = y
+ assert a[3].contents.value == 1000
+ a[3].contents.value += 1
+ assert y.value == 1001
- def test_void_p(self):
- x = c_int(12)
- p1 = cast(pointer(x), c_void_p)
- p2 = cast(p1, POINTER(c_int))
- assert p2.contents.value == 12
+def test_void_p():
+ x = c_int(12)
+ p1 = cast(pointer(x), c_void_p)
+ p2 = cast(p1, POINTER(c_int))
+ assert p2.contents.value == 12
- def test_char_array(self):
- a = (c_char * 3)()
- a[0] = 'x'
- a[1] = 'y'
- assert a.value == 'xy'
- a[2] = 'z'
- assert a.value == 'xyz'
+def test_char_array():
+ a = (c_char * 3)()
+ a[0] = 'x'
+ a[1] = 'y'
+ assert a.value == 'xy'
+ a[2] = 'z'
+ assert a.value == 'xyz'
- b = create_string_buffer(3)
- assert type(b) is type(a)
- assert len(b) == 3
+ b = create_string_buffer(3)
+ assert type(b) is type(a)
+ assert len(b) == 3
- b.value = "nxw"
- assert b[0] == 'n'
- assert b[1] == 'x'
- assert b[2] == 'w'
+ b.value = "nxw"
+ assert b[0] == 'n'
+ assert b[1] == 'x'
+ assert b[2] == 'w'
- b.value = "?"
- assert b[0] == '?'
- assert b[1] == '\x00'
- assert b[2] == 'w'
+ b.value = "?"
+ assert b[0] == '?'
+ assert b[1] == '\x00'
+ assert b[2] == 'w'
- class S(Structure):
- _fields_ = [('p', POINTER(c_char))]
+ class S(Structure):
+ _fields_ = [('p', POINTER(c_char))]
- s = S()
- s.p = b
- s.p.contents.value = '!'
- assert b.value == '!'
+ s = S()
+ s.p = b
+ s.p.contents.value = '!'
+ assert b.value == '!'
- assert len(create_string_buffer(0)) == 0
+ assert len(create_string_buffer(0)) == 0
- def test_array(self):
- a = (c_int * 10)()
+def test_array():
+ a = (c_int * 10)()
- class S(Structure):
- _fields_ = [('p', POINTER(c_int))]
+ class S(Structure):
+ _fields_ = [('p', POINTER(c_int))]
- s = S()
- s.p = a
- s.p.contents.value = 42
- assert a[0] == 42
+ s = S()
+ s.p = a
+ s.p.contents.value = 42
+ assert a[0] == 42
- a = (c_int * 5)(5, 6, 7)
- assert list(a) == [5, 6, 7, 0, 0]
+ a = (c_int * 5)(5, 6, 7)
+ assert list(a) == [5, 6, 7, 0, 0]
- def test_truth_value(self):
- p = POINTER(c_int)()
- assert not p
- p.contents = c_int(12)
- assert p
- # I can't figure out how to reset p to NULL...
+def test_truth_value():
+ p = POINTER(c_int)()
+ assert not p
+ p.contents = c_int(12)
+ assert p
+ # I can't figure out how to reset p to NULL...
- assert c_int(12)
- assert not c_int(0) # a bit strange, if you ask me
- assert c_int(-1)
- assert not c_byte(0)
- assert not c_char('\x00') # hum
- assert not c_float(0.0)
- assert not c_double(0.0)
- assert not c_ulonglong(0)
- assert c_ulonglong(2L**42)
+ assert c_int(12)
+ assert not c_int(0) # a bit strange, if you ask me
+ assert c_int(-1)
+ assert not c_byte(0)
+ assert not c_char('\x00') # hum
+ assert not c_float(0.0)
+ assert not c_double(0.0)
+ assert not c_ulonglong(0)
+ assert c_ulonglong(2L**42)
- assert c_char_p("hello")
- assert c_char_p("")
- assert not c_char_p(None)
+ assert c_char_p("hello")
+ assert c_char_p("")
+ assert not c_char_p(None)
- assert not c_void_p()
+ assert not c_void_p()
- def test_sizeof(self):
- x = create_string_buffer(117)
- assert sizeof(x) == 117 # assumes that chars are one byte each
- x = (c_int * 42)()
- assert sizeof(x) == 42 * sizeof(c_int)
+def test_sizeof():
+ x = create_string_buffer(117)
+ assert sizeof(x) == 117 # assumes that chars are one byte each
+ x = (c_int * 42)()
+ assert sizeof(x) == 42 * sizeof(c_int)
- def test_convert_pointers(self, dll):
- func = dll._testfunc_p_p
- func.restype = c_char_p
+def test_convert_pointers(dll):
+ func = dll._testfunc_p_p
+ func.restype = c_char_p
- # automatic conversions to c_char_p
- func.argtypes = [c_char_p]
- assert func("hello") == "hello"
- assert func(c_char_p("hello")) == "hello"
- assert func((c_char * 6)(*"hello")) == "hello"
- assert func(create_string_buffer("hello")) == "hello"
+ # automatic conversions to c_char_p
+ func.argtypes = [c_char_p]
+ assert func("hello") == "hello"
+ assert func(c_char_p("hello")) == "hello"
+ assert func((c_char * 6)(*"hello")) == "hello"
+ assert func(create_string_buffer("hello")) == "hello"
- # automatic conversions to c_void_p
- func.argtypes = [c_void_p]
- assert func("hello") == "hello"
- assert func(c_char_p("hello")) == "hello"
- assert func((c_char * 6)(*"hello")) == "hello"
- assert func((c_byte * 6)(104,101,108,108,111)) =="hello"
- assert func(create_string_buffer("hello")) == "hello"
+ # automatic conversions to c_void_p
+ func.argtypes = [c_void_p]
+ assert func("hello") == "hello"
+ assert func(c_char_p("hello")) == "hello"
+ assert func((c_char * 6)(*"hello")) == "hello"
+ assert func((c_byte * 6)(104,101,108,108,111)) =="hello"
+ assert func(create_string_buffer("hello")) == "hello"
- def test_varsize_cast(self):
- import struct
- N = struct.calcsize("l")
- x = c_long()
- p = cast(pointer(x), POINTER(c_ubyte*N))
- for i, c in enumerate(struct.pack("l", 12345678)):
- p.contents[i] = ord(c)
- assert x.value == 12345678
+def test_varsize_cast():
+ import struct
+ N = struct.calcsize("l")
+ x = c_long()
+ p = cast(pointer(x), POINTER(c_ubyte*N))
+ for i, c in enumerate(struct.pack("l", 12345678)):
+ p.contents[i] = ord(c)
+ assert x.value == 12345678
- def test_cfunctype_inspection(self):
- T = CFUNCTYPE(c_int, c_ubyte)
- # T.argtypes and T.restype don't work, must use a dummy instance
- assert list(T().argtypes) == [c_ubyte]
- assert T().restype == c_int
+def test_cfunctype_inspection():
+ T = CFUNCTYPE(c_int, c_ubyte)
+ # T.argtypes and T.restype don't work, must use a dummy instance
+ assert list(T().argtypes) == [c_ubyte]
+ assert T().restype == c_int
- def test_from_param(self):
- # other working cases of from_param
- assert isinstance(c_void_p.from_param((c_int * 4)()), c_int*4)
+def test_from_param():
+ # other working cases of from_param
+ assert isinstance(c_void_p.from_param((c_int * 4)()), c_int * 4)
- def test_array_mul(self):
- assert c_int * 10 == 10 * c_int == c_int * 10L == 10L * c_int
- py.test.raises(TypeError, 'c_int * c_int')
- py.test.raises(TypeError, 'c_int * (-1.5)')
- py.test.raises(TypeError, 'c_int * "foo"')
- py.test.raises(TypeError, '(-1.5) * c_int')
- py.test.raises(TypeError, '"foo" * c_int')
+def test_array_mul():
+ assert c_int * 10 == 10 * c_int == c_int * 10L == 10L * c_int
+ py.test.raises(TypeError, 'c_int * c_int')
+ py.test.raises(TypeError, 'c_int * (-1.5)')
+ py.test.raises(TypeError, 'c_int * "foo"')
+ py.test.raises(TypeError, '(-1.5) * c_int')
+ py.test.raises(TypeError, '"foo" * c_int')
- def test_cast_none(self):
- def check(P):
- x = cast(None, P)
- assert isinstance(x, P)
- assert not x
- check(c_void_p)
- check(c_char_p)
- check(POINTER(c_int))
- check(POINTER(c_int * 10))
+def test_cast_none():
+ def check(P):
+ x = cast(None, P)
+ assert isinstance(x, P)
+ assert not x
+ check(c_void_p)
+ check(c_char_p)
+ check(POINTER(c_int))
+ check(POINTER(c_int * 10))
diff --git a/pypy/module/test_lib_pypy/ctypes_tests/test_funcptr.py
b/pypy/module/test_lib_pypy/ctypes_tests/test_funcptr.py
--- a/pypy/module/test_lib_pypy/ctypes_tests/test_funcptr.py
+++ b/pypy/module/test_lib_pypy/ctypes_tests/test_funcptr.py
@@ -1,6 +1,5 @@
from ctypes import *
-class TestCFuncPtr:
- def test_restype(self, dll):
- foo = dll.my_unused_function
- assert foo.restype is c_int # by default
+def test_restype(dll):
+ foo = dll.my_unused_function
+ assert foo.restype is c_int # by default
diff --git a/pypy/module/test_lib_pypy/ctypes_tests/test_functions.py
b/pypy/module/test_lib_pypy/ctypes_tests/test_functions.py
--- a/pypy/module/test_lib_pypy/ctypes_tests/test_functions.py
+++ b/pypy/module/test_lib_pypy/ctypes_tests/test_functions.py
@@ -7,238 +7,236 @@
return CDLL(str(sofile), use_errno=True)
-class TestFunctions(object):
+def test_char_result(dll):
+ f = dll._testfunc_i_bhilfd
+ f.argtypes = [c_byte, c_short, c_int, c_long, c_float, c_double]
+ f.restype = c_char
+ result = f(0, 0, 0, 0, 0, 0)
+ assert result == '\x00'
- def test_char_result(self, dll):
- f = dll._testfunc_i_bhilfd
- f.argtypes = [c_byte, c_short, c_int, c_long, c_float, c_double]
- f.restype = c_char
- result = f(0, 0, 0, 0, 0, 0)
- assert result == '\x00'
+def test_boolresult(dll):
+ f = dll._testfunc_i_bhilfd
+ f.argtypes = [c_byte, c_short, c_int, c_long, c_float, c_double]
+ f.restype = c_bool
+ false_result = f(0, 0, 0, 0, 0, 0)
+ assert false_result is False
+ true_result = f(1, 0, 0, 0, 0, 0)
+ assert true_result is True
- def test_boolresult(self, dll):
- f = dll._testfunc_i_bhilfd
- f.argtypes = [c_byte, c_short, c_int, c_long, c_float, c_double]
- f.restype = c_bool
- false_result = f(0, 0, 0, 0, 0, 0)
- assert false_result is False
- true_result = f(1, 0, 0, 0, 0, 0)
- assert true_result is True
+def test_unicode_function_name(dll):
+ f = dll[u'_testfunc_i_bhilfd']
+ f.argtypes = [c_byte, c_short, c_int, c_long, c_float, c_double]
+ f.restype = c_int
+ result = f(1, 2, 3, 4, 5.0, 6.0)
+ assert result == 21
- def test_unicode_function_name(self, dll):
- f = dll[u'_testfunc_i_bhilfd']
- f.argtypes = [c_byte, c_short, c_int, c_long, c_float, c_double]
- f.restype = c_int
- result = f(1, 2, 3, 4, 5.0, 6.0)
- assert result == 21
+def test_truncate_python_longs(dll):
+ f = dll._testfunc_i_bhilfd
+ f.argtypes = [c_byte, c_short, c_int, c_long, c_float, c_double]
+ f.restype = c_int
+ x = sys.maxint * 2
+ result = f(x, x, x, x, 0, 0)
+ assert result == -8
- def test_truncate_python_longs(self, dll):
- f = dll._testfunc_i_bhilfd
- f.argtypes = [c_byte, c_short, c_int, c_long, c_float, c_double]
- f.restype = c_int
- x = sys.maxint * 2
- result = f(x, x, x, x, 0, 0)
- assert result == -8
+def test_convert_pointers(dll):
+ f = dll.deref_LP_c_char_p
+ f.restype = c_char
+ f.argtypes = [POINTER(c_char_p)]
+ #
+ s = c_char_p('hello world')
+ ps = pointer(s)
+ assert f(ps) == 'h'
+ assert f(s) == 'h' # automatic conversion from char** to char*
- def test_convert_pointers(self, dll):
- f = dll.deref_LP_c_char_p
- f.restype = c_char
- f.argtypes = [POINTER(c_char_p)]
- #
- s = c_char_p('hello world')
- ps = pointer(s)
- assert f(ps) == 'h'
- assert f(s) == 'h' # automatic conversion from char** to char*
+################################################################
- ################################################################
+def test_call_some_args(dll):
+ f = dll.my_strchr
+ f.argtypes = [c_char_p]
+ f.restype = c_char_p
+ result = f("abcd", ord("b"))
+ assert result == "bcd"
- def test_call_some_args(self, dll):
- f = dll.my_strchr
- f.argtypes = [c_char_p]
- f.restype = c_char_p
- result = f("abcd", ord("b"))
- assert result == "bcd"
+def test_keepalive_buffers(monkeypatch, dll):
+ import gc
+ f = dll.my_strchr
+ f.argtypes = [c_char_p]
+ f.restype = c_char_p
+ #
+ orig__call_funcptr = f._call_funcptr
+ def _call_funcptr(funcptr, *newargs):
+ gc.collect()
+ gc.collect()
+ gc.collect()
+ return orig__call_funcptr(funcptr, *newargs)
+ monkeypatch.setattr(f, '_call_funcptr', _call_funcptr)
+ #
+ result = f("abcd", ord("b"))
+ assert result == "bcd"
- def test_keepalive_buffers(self, monkeypatch, dll):
- import gc
- f = dll.my_strchr
- f.argtypes = [c_char_p]
- f.restype = c_char_p
- #
- orig__call_funcptr = f._call_funcptr
- def _call_funcptr(funcptr, *newargs):
- gc.collect()
- gc.collect()
- gc.collect()
- return orig__call_funcptr(funcptr, *newargs)
- monkeypatch.setattr(f, '_call_funcptr', _call_funcptr)
- #
- result = f("abcd", ord("b"))
- assert result == "bcd"
+def test_caching_bug_1(dll):
+ # the same test as test_call_some_args, with two extra lines
+ # in the middle that trigger caching in f._ptr, which then
+ # makes the last two lines fail
+ f = dll.my_strchr
+ f.argtypes = [c_char_p, c_int]
+ f.restype = c_char_p
+ result = f("abcd", ord("b"))
+ assert result == "bcd"
+ result = f("abcd", ord("b"), 42)
+ assert result == "bcd"
- def test_caching_bug_1(self, dll):
- # the same test as test_call_some_args, with two extra lines
- # in the middle that trigger caching in f._ptr, which then
- # makes the last two lines fail
- f = dll.my_strchr
- f.argtypes = [c_char_p, c_int]
- f.restype = c_char_p
- result = f("abcd", ord("b"))
- assert result == "bcd"
- result = f("abcd", ord("b"), 42)
- assert result == "bcd"
+def test_argument_conversion_and_checks(dll):
+ #This test is designed to check for segfaults if the wrong type of
argument is passed as parameter
+ strlen = dll.my_strchr
+ strlen.argtypes = [c_char_p, c_int]
+ strlen.restype = c_char_p
+ assert strlen("eggs", ord("g")) == "ggs"
- def test_argument_conversion_and_checks(self, dll):
- #This test is designed to check for segfaults if the wrong type of
argument is passed as parameter
- strlen = dll.my_strchr
- strlen.argtypes = [c_char_p, c_int]
- strlen.restype = c_char_p
- assert strlen("eggs", ord("g")) == "ggs"
+ # Should raise ArgumentError, not segfault
+ with pytest.raises(ArgumentError):
+ strlen(0, 0)
+ with pytest.raises(ArgumentError):
+ strlen(False, 0)
- # Should raise ArgumentError, not segfault
- with pytest.raises(ArgumentError):
- strlen(0, 0)
- with pytest.raises(ArgumentError):
- strlen(False, 0)
+def test_union_as_passed_value(dll):
+ class UN(Union):
+ _fields_ = [("x", c_short),
+ ("y", c_long)]
+ dll.ret_un_func.restype = UN
+ dll.ret_un_func.argtypes = [UN]
+ A = UN * 2
+ a = A()
+ a[1].x = 33
+ u = dll.ret_un_func(a[1])
+ assert u.y == 33 * 10000
- def test_union_as_passed_value(self, dll):
- class UN(Union):
- _fields_ = [("x", c_short),
- ("y", c_long)]
- dll.ret_un_func.restype = UN
- dll.ret_un_func.argtypes = [UN]
- A = UN * 2
- a = A()
- a[1].x = 33
- u = dll.ret_un_func(a[1])
- assert u.y == 33 * 10000
+def test_cache_funcptr(dll):
+ tf_b = dll.tf_b
+ tf_b.restype = c_byte
+ tf_b.argtypes = (c_byte,)
+ assert tf_b(-126) == -42
+ ptr = tf_b._ptr
+ assert ptr is not None
+ assert tf_b(-126) == -42
+ assert tf_b._ptr is ptr
- def test_cache_funcptr(self, dll):
- tf_b = dll.tf_b
- tf_b.restype = c_byte
- tf_b.argtypes = (c_byte,)
- assert tf_b(-126) == -42
- ptr = tf_b._ptr
- assert ptr is not None
- assert tf_b(-126) == -42
- assert tf_b._ptr is ptr
+def test_custom_from_param(dll):
+ class A(c_byte):
+ @classmethod
+ def from_param(cls, obj):
+ seen.append(obj)
+ return -126
+ tf_b = dll.tf_b
+ tf_b.restype = c_byte
+ tf_b.argtypes = (c_byte,)
+ tf_b.argtypes = [A]
+ seen = []
+ assert tf_b("yadda") == -42
+ assert seen == ["yadda"]
- def test_custom_from_param(self, dll):
- class A(c_byte):
- @classmethod
- def from_param(cls, obj):
- seen.append(obj)
- return -126
- tf_b = dll.tf_b
- tf_b.restype = c_byte
- tf_b.argtypes = (c_byte,)
- tf_b.argtypes = [A]
- seen = []
- assert tf_b("yadda") == -42
- assert seen == ["yadda"]
+@pytest.mark.xfail(reason="warnings are disabled")
+def test_warnings(dll):
+ import warnings
+ warnings.simplefilter("always")
+ with warnings.catch_warnings(record=True) as w:
+ dll.get_an_integer()
+ assert len(w) == 1
+ assert issubclass(w[0].category, RuntimeWarning)
+ assert "C function without declared arguments called" in
str(w[0].message)
- @pytest.mark.xfail(reason="warnings are disabled")
- def test_warnings(self, dll):
- import warnings
- warnings.simplefilter("always")
- with warnings.catch_warnings(record=True) as w:
- dll.get_an_integer()
- assert len(w) == 1
- assert issubclass(w[0].category, RuntimeWarning)
- assert "C function without declared arguments called" in
str(w[0].message)
+@pytest.mark.xfail
+def test_errcheck(dll):
+ import warnings
+ def errcheck(result, func, args):
+ assert result == -42
+ assert type(result) is int
+ arg, = args
+ assert arg == -126
+ assert type(arg) is int
+ return result
+ #
+ tf_b = dll.tf_b
+ tf_b.restype = c_byte
+ tf_b.argtypes = (c_byte,)
+ tf_b.errcheck = errcheck
+ assert tf_b(-126) == -42
+ del tf_b.errcheck
+ with warnings.catch_warnings(record=True) as w:
+ dll.get_an_integer.argtypes = []
+ dll.get_an_integer()
+ assert len(w) == 1
+ assert issubclass(w[0].category, RuntimeWarning)
+ assert "C function without declared return type called" in
str(w[0].message)
- @pytest.mark.xfail
- def test_errcheck(self, dll):
- import warnings
- def errcheck(result, func, args):
- assert result == -42
- assert type(result) is int
- arg, = args
- assert arg == -126
- assert type(arg) is int
- return result
- #
- tf_b = dll.tf_b
- tf_b.restype = c_byte
- tf_b.argtypes = (c_byte,)
- tf_b.errcheck = errcheck
- assert tf_b(-126) == -42
- del tf_b.errcheck
- with warnings.catch_warnings(record=True) as w:
- dll.get_an_integer.argtypes = []
- dll.get_an_integer()
- assert len(w) == 1
- assert issubclass(w[0].category, RuntimeWarning)
- assert "C function without declared return type called" in
str(w[0].message)
+ with warnings.catch_warnings(record=True) as w:
+ dll.get_an_integer.restype = None
+ dll.get_an_integer()
+ assert len(w) == 0
- with warnings.catch_warnings(record=True) as w:
- dll.get_an_integer.restype = None
- dll.get_an_integer()
- assert len(w) == 0
+ warnings.resetwarnings()
- warnings.resetwarnings()
+def test_errno(dll):
+ test_errno = dll.test_errno
+ test_errno.restype = c_int
+ set_errno(42)
+ res = test_errno()
+ n = get_errno()
+ assert (res, n) == (42, 43)
+ set_errno(0)
+ assert get_errno() == 0
- def test_errno(self, dll):
- test_errno = dll.test_errno
- test_errno.restype = c_int
- set_errno(42)
- res = test_errno()
- n = get_errno()
- assert (res, n) == (42, 43)
- set_errno(0)
- assert get_errno() == 0
+def test_issue1655(dll):
+ def ret_list_p(icount):
+ def sz_array_p(obj, func, args):
+ assert ('.LP_c_int object' in repr(obj) or
+ '.LP_c_long object' in repr(obj))
+ assert repr(args) in ("('testing!', c_int(4))",
+ "('testing!', c_long(4))")
+ assert args[icount].value == 4
+ return [obj[i] for i in range(args[icount].value)]
+ return sz_array_p
- def test_issue1655(self, dll):
- def ret_list_p(icount):
- def sz_array_p(obj, func, args):
- assert ('.LP_c_int object' in repr(obj) or
- '.LP_c_long object' in repr(obj))
- assert repr(args) in ("('testing!', c_int(4))",
- "('testing!', c_long(4))")
- assert args[icount].value == 4
- return [obj[i] for i in range(args[icount].value)]
- return sz_array_p
+ get_data_prototype = CFUNCTYPE(POINTER(c_int),
+ c_char_p, POINTER(c_int))
+ get_data_paramflag = ((1,), (2,))
+ get_data_signature = ('test_issue1655', dll)
- get_data_prototype = CFUNCTYPE(POINTER(c_int),
- c_char_p, POINTER(c_int))
- get_data_paramflag = ((1,), (2,))
- get_data_signature = ('test_issue1655', dll)
+ get_data = get_data_prototype(get_data_signature, get_data_paramflag)
+ assert get_data('testing!') == 4
- get_data = get_data_prototype(get_data_signature, get_data_paramflag)
- assert get_data('testing!') == 4
+ get_data.errcheck = ret_list_p(1)
+ assert get_data('testing!') == [-1, -2, -3, -4]
- get_data.errcheck = ret_list_p(1)
- assert get_data('testing!') == [-1, -2, -3, -4]
+def test_issue2533(tmpdir):
+ import cffi
+ ffi = cffi.FFI()
+ ffi.cdef("int **fetchme(void);")
+ ffi.set_source("_x_cffi", """
+ int **fetchme(void)
+ {
+ static int a = 42;
+ static int *pa = &a;
+ return &pa;
+ }
+ """)
+ ffi.compile(verbose=True, tmpdir=str(tmpdir))
- def test_issue2533(self, tmpdir):
- import cffi
- ffi = cffi.FFI()
- ffi.cdef("int **fetchme(void);")
- ffi.set_source("_x_cffi", """
- int **fetchme(void)
- {
- static int a = 42;
- static int *pa = &a;
- return &pa;
- }
- """)
- ffi.compile(verbose=True, tmpdir=str(tmpdir))
+ import sys
+ sys.path.insert(0, str(tmpdir))
+ try:
+ from _x_cffi import ffi, lib
+ finally:
+ sys.path.pop(0)
+ fetchme = ffi.addressof(lib, 'fetchme')
+ fetchme = int(ffi.cast("intptr_t", fetchme))
- import sys
- sys.path.insert(0, str(tmpdir))
- try:
- from _x_cffi import ffi, lib
- finally:
- sys.path.pop(0)
- fetchme = ffi.addressof(lib, 'fetchme')
- fetchme = int(ffi.cast("intptr_t", fetchme))
+ FN = CFUNCTYPE(POINTER(POINTER(c_int)))
+ ff = cast(fetchme, FN)
- FN = CFUNCTYPE(POINTER(POINTER(c_int)))
- ff = cast(fetchme, FN)
+ g = ff()
+ assert g.contents.contents.value == 42
- g = ff()
- assert g.contents.contents.value == 42
-
- h = c_int(43)
- g[0] = pointer(h) # used to crash here
- assert g.contents.contents.value == 43
+ h = c_int(43)
+ g[0] = pointer(h) # used to crash here
+ assert g.contents.contents.value == 43
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