fix for StorageList and tests added

gluon/storage.py
StorageList had a recursion error (please check the implementation before committing)

gluon/tests*
added the fix_path module to avoid those ugly lines at the beginning of each test file
added tests for gluon.contenttype and test_fileutils
added tests for missing Storage methods

gluon/tests/test_languages.py

@@ -7,38 +7,11 @@
 
 import sys
 import os
-import unittest
 import tempfile
-import threading
-import logging
+import unittest
+from fix_path import fix_sys_path
 
-def fix_sys_path():
-    """
-    logic to have always the correct sys.path
-     '', web2py/gluon, web2py/site-packages, web2py/ ...
-    """
-
-    def add_path_first(path):
-        sys.path = [path] + [p for p in sys.path if (
-            not p == path and not p == (path + '/'))]
-
-    path = os.path.dirname(os.path.abspath(__file__))
-
-    if not os.path.isfile(os.path.join(path,'web2py.py')):
-        i = 0
-        while i<10:
-            i += 1
-            if os.path.exists(os.path.join(path,'web2py.py')):
-                break
-            path = os.path.abspath(os.path.join(path, '..'))
-
-    paths = [path,
-             os.path.abspath(os.path.join(path, 'site-packages')),
-             os.path.abspath(os.path.join(path, 'gluon')),
-             '']
-    [add_path_first(path) for path in paths]
-
-fix_sys_path()
+fix_sys_path(__file__)
 
 #support skipif also in python 2.6
 def _skipIf(cond, message=''):
@@ -55,7 +28,6 @@ else:
     skipIf = _skipIf
 
 import languages
-from storage import Storage
 MP_WORKING = 0
 try:
     import multiprocessing
@@ -63,10 +35,6 @@ try:
     #due to http://bugs.python.org/issue10845, testing multiprocessing in python is impossible
     if sys.platform.startswith('win'):
         MP_WORKING = 0
-    #multiprocessing is also not available on GAE. Since tests randomly
-    #fail, let's not make them on it too
-    if 'datastore' in os.getenv('DB', ''):
-        MP_WORKING = 0
 except ImportError:
     pass
 
@@ -80,6 +48,7 @@ def read_write(args):
         languages.write_dict(filename, content)
     return True
 
+
 class TestLanguagesParallel(unittest.TestCase):
 
     def setUp(self):
@@ -95,7 +64,7 @@ class TestLanguagesParallel(unittest.TestCase):
             os.remove(self.filename)
         except:
             pass
-    
+
     @skipIf(MP_WORKING == 0, 'multiprocessing tests unavailable')
     def test_reads_and_writes(self):
         readwriters = 10
@@ -103,7 +72,7 @@ class TestLanguagesParallel(unittest.TestCase):
         results = pool.map(read_write, [[self.filename, 10]] * readwriters)
         for result in results:
             self.assertTrue(result)
-    
+
     @skipIf(MP_WORKING == 1, 'multiprocessing tests available')
     def test_reads_and_writes_no_mp(self):
         results = []
@@ -112,6 +81,7 @@ class TestLanguagesParallel(unittest.TestCase):
         for result in results:
             self.assertTrue(result)
 
+
 class TestTranslations(unittest.TestCase):
 
     def setUp(self):
@@ -148,7 +118,6 @@ class TestTranslations(unittest.TestCase):
         T.force('it')
         self.assertEqual(str(T('Hello World')),
                          'Salve Mondo')
-      
+
 if __name__ == '__main__':
     unittest.main()
-