Fix some tests

Author: slozier

tests/IronPython.Tests/Cases/IronPythonCasesManifest.ini

@@ -146,6 +146,7 @@ Reason=StackOverflowException - https://github.com/IronLanguages/ironpython2/iss
 
 [IronPython.test_threading_stdlib]
 IsolationLevel=PROCESS
+RunCondition=NOT $(IS_MONO) # TODO: figure out
 
 [IronPython.test_threadsafety]
 Ignore=true

tests/suite/test_functools_stdlib.py

@@ -58,6 +58,7 @@ def load_tests(loader, standard_tests, pattern):
             skip_tests += [
                 test.test_functools.TestPartialCSubclass('test_weakref'),
                 test.test_functools.TestPartialPy('test_weakref'),
+                test.test_functools.TestPartialPySubclass('test_weakref'),
             ]
 
         return generate_suite(tests, failing_tests, skip_tests)

tests/suite/test_io_stdlib.py

@@ -118,11 +118,6 @@ def load_tests(loader, standard_tests, pattern):
             test.test_io.PyTextIOWrapperTest('test_read_byteslike'),
         ]
 
-        if is_mono:
-            failing_tests += [
-                test.test_io.PyMiscIOTest('test_create_fail'),
-            ]
-
         if is_mono or is_windows:
             failing_tests += [
                 test.test_io.PyTextIOWrapperTest('test_seek_append_bom'), # OSError: [Errno -2146232800] Unable seek backward to overwrite data that previously existed in a file opened in Append mode.

tests/suite/test_structures_ctypes_stdlib.py

@@ -18,10 +18,6 @@ def load_tests(loader, standard_tests, pattern):
             ctypes.test.test_structures.StructureTestCase('test_conflicting_initializers'), # AssertionError
             ctypes.test.test_structures.StructureTestCase('test_pass_by_value_in_register'), # NotImplementedError: in dll
         ]
-        if is_osx:
-            failing_tests += [
-                ctypes.test.test_structures.StructureTestCase('test_pass_by_value'),
-            ]
 
         return generate_suite(tests, failing_tests)