Added first test

openlp/core/utils/__init__.py

@@ -253,10 +253,10 @@ def is_not_image_file(file_name):
     ``file_name``
         File name to be checked.
     """
-    if file_name.isEmpty():
+    if not file_name:
         return True
     else:
-        formats = [fmt.lower() for fmt in QtGui.QImageReader.supportedImageFormats()]
+        formats = [unicode(fmt).lower() for fmt in QtGui.QImageReader.supportedImageFormats()]
         file_part, file_extension = os.path.splitext(unicode(file_name))
         if file_extension[1:].lower() in formats and os.path.exists(file_name):
             return False

tests/interfaces/openlp_core_utils/test_utils.py

@@ -0,0 +1,29 @@
+"""
+Functional tests to test the AppLocation class and related methods.
+"""
+from unittest import TestCase
+
+from mock import patch
+from PyQt4 import QtCore
+
+
+from openlp.core.utils import is_not_image_file
+from tests.utils.constants import TEST_RESOURCES_PATH
+
+
+class TestUtils(TestCase):
+    """
+    A test suite to test out various methods around the Utils functions.
+    """
+    def is_not_image_empty_test(self):
+        """
+        Test the method handles an empty string
+        """
+        # Given and empty string
+        file_name = ""
+
+        # WHEN testing for it
+        result = is_not_image_file(file_name)
+
+        # THEN the result is false
+        assert result is True, u'The missing file test should return True'