Fixed failing tests on Windows.

core/results.py

@@ -316,7 +316,9 @@ class Results(Markable):
         try:
             do_write(outfile)
         except IOError as e:
-            if e.errno == 21: # outfile is a directory
+            # If our IOError is because dest is already a directory, we want to handle that. 21 is
+            # the code we get on OS X and Linux, 13 is what we get on Windows.
+            if e.errno in {21, 13}:
                 p = str(outfile)
                 dirname, basename = op.split(p)
                 otherfiles = os.listdir(dirname)

core/tests/prioritize_test.py

@@ -6,6 +6,7 @@
 # which should be included with this package. The terms are also available at 
 # http://www.hardcoded.net/licenses/bsd_license
 
+import os.path as op
 from itertools import combinations
 
 from .base import TestApp, NamedObject, with_app, eq_
@@ -156,7 +157,7 @@ def app_with_subfolders():
 def test_folder_crit_is_sorted(app):
     # Folder subcriteria are sorted.
     app.select_pri_criterion("Folder")
-    eq_(app.pdialog.criteria_list[:], ['baz', 'foo', 'foo/bar'])
+    eq_(app.pdialog.criteria_list[:], ['baz', 'foo', op.join('foo', 'bar')])
 
 @with_app(app_with_subfolders)
 def test_folder_crit_includes_subfolders(app):