Fix some tests

Author: slozier

src/core/IronPython.Modules/_ctypes/SimpleType.cs

@@ -58,8 +58,14 @@ public SimpleType(CodeContext/*!*/ context, string name, PythonTuple bases, Pyth
                     case 'H': _type = SimpleTypeKind.UnsignedShort; break;
                     case 'i': _type = SimpleTypeKind.SignedInt; break;
                     case 'I': _type = SimpleTypeKind.UnsignedInt; break;
-                    case 'l': _type = SimpleTypeKind.SignedLong; break;
-                    case 'L': _type = SimpleTypeKind.UnsignedLong; break;
+                    case 'l':
+                        _type = SimpleTypeKind.SignedLong;
+                        _charType = TypecodeOps.IsCLong32Bit ? _charType : 'q';
+                        break;
+                    case 'L':
+                        _type = SimpleTypeKind.UnsignedLong;
+                        _charType = TypecodeOps.IsCLong32Bit ? _charType : 'Q';
+                        break;
                     case 'f': _type = SimpleTypeKind.Single; break;
                     case 'g': // long double, new in 2.6
                     case 'd': _type = SimpleTypeKind.Double; break;

src/core/IronPython.Modules/nt.cs

@@ -849,6 +849,8 @@ public static object open(CodeContext/*!*/ context, [NotNone] string path, int f
                 }
             }
 
+            VerifyPath(path, functionName: nameof(open), argName: nameof(path));
+
             if ((RuntimeInformation.IsOSPlatform(OSPlatform.Linux) || RuntimeInformation.IsOSPlatform(OSPlatform.OSX)) && !ClrModule.IsMono) {
                 // Use PosixFileStream to operate on fd directly
                 // On Mono, we must use FileStream due to limitations in MemoryMappedFile

tests/IronPython.Tests/Cases/CPythonCasesManifest.ini

@@ -7,9 +7,6 @@ Timeout=120000 # 2 minute timeout
 [CPython.ctypes.test_as_parameter]
 Ignore=true
 
-[CPython.ctypes.test_bitfields] # IronPython.modules.type_related.test_bitfields_ctypes_stdlib
-Ignore=true
-
 [CPython.ctypes.test_cast]
 RunCondition=NOT $(IS_POSIX) # https://github.com/IronLanguages/ironpython3/issues/1455
 

tests/suite/modules/type_related/test_bitfields_ctypes_stdlib.py

@@ -6,7 +6,7 @@
 ## Run selected tests from test_array from StdLib
 ##
 
-from iptest import is_ironpython, generate_suite, run_test
+from iptest import is_ironpython, generate_suite, run_test, is_windows
 
 import test.test_array
 
@@ -61,6 +61,11 @@ def load_tests(loader, standard_tests, pattern):
             test.test_array.UnsignedShortTest('test_type_error'), # https://github.com/IronLanguages/ironpython3/issues/767
         ]
 
+        if not is_windows:
+            failing_tests += [
+                test.test_array.LongTest('test_overflow'), # OverflowError: couldn't convert Intable to Int64
+            ]
+
         return generate_suite(tests, failing_tests)
 
     else: