Fixed an issue where path cases in Windows are inconsistent, causing tests to fail.

Author: Nurdok

src/tests/test_cases/test.py

@@ -1,5 +1,6 @@
 # encoding: utf-8
 # No docstring, so we can test D100
+import os
 import sys
 from .expected import Expectation
 
@@ -362,5 +363,5 @@ def docstring_ignore_violations_of_pydocstyle_D400_and_PEP8_E501_but_catch_D401(
     """Runs something"""
     pass
 
-expect(__file__ if __file__[-1] != 'c' else __file__[:-1],
+expect(os.path.normcase(__file__ if __file__[-1] != 'c' else __file__[:-1]),
        'D100: Missing docstring in public module')

src/tests/test_definitions.py

@@ -273,8 +273,11 @@ def test_pep257(test_case):
                              locals=locals(),
                              fromlist=['expectation'],
                              level=1)
-    results = list(check([os.path.join(os.path.dirname(__file__),
-                                       'test_cases', test_case + '.py')],
+    test_case_dir = os.path.normcase(os.path.dirname(__file__))
+    test_case_file = os.path.join(test_case_dir,
+                                  'test_cases',
+                                  test_case + '.py')
+    results = list(check([test_case_file],
                          select=set(ErrorRegistry.get_error_codes())))
     for error in results:
         assert isinstance(error, Error)