Fix basecenum not able to bind methods

Due to the newly added is_initialized, it was
no longer possible to bind methods to a BaseCEnum
this is fixed by adding a is_initialized method
to BaseCEnum.

cwrap/basecenum.py

@@ -16,11 +16,13 @@
 
 from __future__ import absolute_import, division, print_function, unicode_literals
 
+import ctypes
+
 import six
 
-import ctypes
 from .metacwrap import MetaCWrap
 
+
 @six.add_metaclass(MetaCWrap)
 class BaseCEnum(object):
     enum_namespace = {}
@@ -87,6 +89,9 @@ def __eq__(self, other):
 
         return False
 
+    def is_initialized(self):
+        return True
+
     def __hash__(self):
         return hash(self.value)
 
@@ -109,7 +114,6 @@ def __or__(self, other):
         value = self.value | other.value
         return self.__resolveOrCreateEnum(value)
 
-
     def __xor__(self, other):
         self.__assertOtherIsSameType(other)
         value = self.value ^ other.value
@@ -150,16 +154,22 @@ def __resolveEnum(cls, value):
         return None
 
     def __assertOtherIsSameType(self, other):
-        assert isinstance(other, self.__class__), "Can only operate on enums of same type: %s =! %s" % (
-            self.__class__.__name__, other.__class__.__name__)
-
+        assert isinstance(
+            other, self.__class__
+        ), "Can only operate on enums of same type: %s =! %s" % (
+            self.__class__.__name__,
+            other.__class__.__name__,
+        )
 
     @classmethod
     def populateEnum(cls, library, enum_provider_function):
         try:
             func = getattr(library, enum_provider_function)
         except AttributeError:
-            raise ValueError("Could not find enum description function: %s - can not load enum: %s." % (enum_provider_function, cls.__name__))
+            raise ValueError(
+                "Could not find enum description function: %s - can not load enum: %s."
+                % (enum_provider_function, cls.__name__)
+            )
 
         func.restype = ctypes.c_char_p
         func.argtypes = [ctypes.c_int, ctypes.POINTER(ctypes.c_int)]
@@ -174,4 +184,3 @@ def populateEnum(cls, library, enum_provider_function):
                 index += 1
             else:
                 break
-

tests/test_basecenum.py

@@ -1,10 +1,10 @@
+import os
 import unittest
 
-from cwrap import BaseCEnum
+from cwrap import BaseCEnum, Prototype, load
 
 
 class BaseCEnumTest(unittest.TestCase):
-
     def test_base_c_enum(self):
         class enum(BaseCEnum):
             pass
@@ -33,19 +33,16 @@ class enum2(BaseCEnum):
 
         self.assertEqual(str(enum.ONE), "ONE")
 
-
         self.assertEqual(enum.ONE + enum.TWO, enum.THREE)
         self.assertEqual(enum.ONE + enum.FOUR, 5)
 
         with self.assertRaises(ValueError):
             e = enum(5)
 
-
         self.assertEqual(enum.THREE & enum.ONE, enum.ONE)
         self.assertEqual(enum.ONE | enum.TWO, enum.THREE)
         self.assertEqual(enum.THREE ^ enum.TWO, enum.ONE)
 
-
         with self.assertRaises(AssertionError):
             e = enum.ONE + enum2.ONE
 
@@ -58,7 +55,6 @@ class enum2(BaseCEnum):
         with self.assertRaises(AssertionError):
             e = enum.ONE ^ enum2.ONE
 
-
     def test_in_operator(self):
         class PowerOf2(BaseCEnum):
             pass
@@ -87,11 +83,10 @@ class MyLonelyEnum(BaseCEnum):
         tri = MyLonelyEnum.THREE
 
         self.assertEqual(repr(tri), 'MyLonelyEnum(name = "THREE", value = 3)')
-        self.assertEqual(str(tri), 'THREE')
-        self.assertEqual(tri.name, 'THREE')
+        self.assertEqual(str(tri), "THREE")
+        self.assertEqual(tri.name, "THREE")
         self.assertEqual(tri.value, 3)
 
-
     def test_from_name(self):
         class EnumName(BaseCEnum):
             pass
@@ -104,3 +99,25 @@ class EnumName(BaseCEnum):
 
         one = EnumName.from_string("ONE")
         self.assertEqual(one, EnumName.ONE)
+
+
+def test_that_enum_can_be_bind_methods():
+    class LibCPrototype(Prototype):
+        lib = load("msvcrt" if os.name == "nt" else None)
+
+        def __init__(self, prototype, bind=False, allow_attribute_error=False):
+            super(LibCPrototype, self).__init__(
+                LibCPrototype.lib,
+                prototype,
+                bind=bind,
+                allow_attribute_error=allow_attribute_error,
+            )
+
+    class Endumb(BaseCEnum):
+        TYPE_NAME = "endumb"
+        SOME_VALUE = None
+        SOME_OTHER_VALUE = None
+        abs = LibCPrototype("int abs(endumb)", bind=True)
+
+    Endumb.addEnum("SOME_VALUE", -1)
+    assert Endumb.SOME_VALUE.abs() == 1