[test_fileio.py] Change Test File Path to example.odml

Change to more robust way to access file location and
use file from within test dir.

Otherwise might not be found during local testing.

Author: fschrader1992

test/test_fileio.py

@@ -13,7 +13,8 @@ class TestTypes(unittest.TestCase):
     # TODO :- Write tests for JSONParser once it's completed.
 
     def setUp(self):
-        self.file = 'doc/example_odMLs/THGTTG.odml'
+        self.dir_path = os.path.dirname(os.path.realpath(__file__))
+        self.file = os.path.join(self.dir_path, 'resources', 'example.odml')
         # Do not allow anything to be printed on STDOUT
         self.captured_stdout = StringIO()
         sys.stdout = self.captured_stdout