Option to override user's defaults. Needed for unit testing.

tests/test_gerber_import.py

@@ -10,7 +10,10 @@ class BaseGUITestCase(unittest.TestCase):
 
     def setUp(self):
         self.app = QtGui.QApplication(sys.argv)
-        self.fc = App()
+
+        # Create App, keep app defaults (do not load
+        # user-defined defaults).
+        self.fc = App(user_defaults=False)
 
         self.fc.open_gerber('tests/gerber_files/' + self.filename)
 
@@ -20,8 +23,12 @@ class BaseGUITestCase(unittest.TestCase):
 
     def test_available(self):
         names = self.fc.collection.get_names()
+
+        # Total of 1 objects
         self.assertEquals(len(names), 1,
                           "Expected 1 object, found %d" % len(names))
+
+        # Object's name matches the file name.
         self.assertEquals(names[0], self.filename,
                           "Expected name == %s, got %s" % (self.filename, names[0]))
         print names[0]