Skip some failing tests on Windows

It's not obvious how to fix these, and it's not in code that ought to be
platform dependent, so let's skip these tests so we can see real
failures.

IPython/core/tests/test_shellapp.py

@@ -1,64 +1,68 b''
 # -*- coding: utf-8 -*-
 """Tests for shellapp module.
 
 Authors
 -------
 * Bradley Froehle
 """
 #-----------------------------------------------------------------------------
 #  Copyright (C) 2012  The IPython Development Team
 #
 #  Distributed under the terms of the BSD License.  The full license is in
 #  the file COPYING, distributed as part of this software.
 #-----------------------------------------------------------------------------
 
 #-----------------------------------------------------------------------------
 # Imports
 #-----------------------------------------------------------------------------
 import unittest
 
 from IPython.testing import decorators as dec
 from IPython.testing import tools as tt
 from IPython.utils.py3compat import PY3
 
 sqlite_err_maybe = dec.module_not_available('sqlite3')
 SQLITE_NOT_AVAILABLE_ERROR = ('WARNING: IPython History requires SQLite,'
                               ' your history will not be saved\n')
 
 class TestFileToRun(unittest.TestCase, tt.TempFileMixin):
     """Test the behavior of the file_to_run parameter."""
 
     def test_py_script_file_attribute(self):
         """Test that `__file__` is set when running `ipython file.py`"""
         src = "print(__file__)\n"
         self.mktmp(src)
 
         err = SQLITE_NOT_AVAILABLE_ERROR if sqlite_err_maybe else None
         tt.ipexec_validate(self.fname, self.fname, err)
 
     def test_ipy_script_file_attribute(self):
         """Test that `__file__` is set when running `ipython file.ipy`"""
         src = "print(__file__)\n"
         self.mktmp(src, ext='.ipy')
 
         err = SQLITE_NOT_AVAILABLE_ERROR if sqlite_err_maybe else None
         tt.ipexec_validate(self.fname, self.fname, err)
 
+    # The commands option to ipexec_validate doesn't work on Windows, and it
+    # doesn't seem worth fixing
+    @dec.skip_win32
     def test_py_script_file_attribute_interactively(self):
         """Test that `__file__` is not set after `ipython -i file.py`"""
         src = "True\n"
         self.mktmp(src)
 
         err = SQLITE_NOT_AVAILABLE_ERROR if sqlite_err_maybe else None
         tt.ipexec_validate(self.fname, 'False', err, options=['-i'],
                            commands=['"__file__" in globals()', 'exit()'])
 
+    @dec.skip_win32
     @dec.skipif(PY3)
     def test_py_script_file_compiler_directive(self):
         """Test `__future__` compiler directives with `ipython -i file.py`"""
         src = "from __future__ import division\n"
         self.mktmp(src)
 
         err = SQLITE_NOT_AVAILABLE_ERROR if sqlite_err_maybe else None
         tt.ipexec_validate(self.fname, 'float', err, options=['-i'],
                            commands=['type(1/2)', 'exit()'])