Fixes 1410456 and adds a couple tests

Fixes: https://launchpad.net/bugs/1410456

openlp/plugins/images/lib/mediaitem.py

@@ -371,7 +371,7 @@ class ImageMediaItem(MediaManagerItem):
         """
         self.application.set_normal_cursor()
         self.load_list(files, target_group)
-        last_dir = os.path.split(str(files[0]))[0]
+        last_dir = os.path.split(files[0])[0]
         Settings().setValue(self.settings_section + '/last directory', last_dir)
 
     def load_list(self, images, target_group=None, initial_load=False):
@@ -535,7 +535,7 @@ class ImageMediaItem(MediaManagerItem):
             if not items:
                 return False
         # Determine service item title
-        if isinstance(items[0].data(0, QtCore.Qt.UserRole), ImageGroups):
+        if isinstance(items[0].data(0, QtCore.Qt.UserRole), ImageGroups) or len(items) == 1:
             service_item.title = items[0].text(0)
         else:
             service_item.title = str(self.plugin.name_strings['plural'])

tests/functional/__init__.py

@@ -35,9 +35,9 @@ import sys
 from PyQt4 import QtGui
 
 if sys.version_info[1] >= 3:
-    from unittest.mock import MagicMock, patch, mock_open, call
+    from unittest.mock import ANY, MagicMock, patch, mock_open, call
 else:
-    from mock import MagicMock, patch, mock_open, call
+    from mock import ANY, MagicMock, patch, mock_open, call
 
 # Only one QApplication can be created. Use QtGui.QApplication.instance() when you need to "create" a  QApplication.
 application = QtGui.QApplication([])

tests/functional/openlp_plugins/images/test_lib.py

@@ -27,7 +27,7 @@ from unittest import TestCase
 from openlp.core.common import Registry
 from openlp.plugins.images.lib.db import ImageFilenames, ImageGroups
 from openlp.plugins.images.lib.mediaitem import ImageMediaItem
-from tests.functional import MagicMock, patch
+from tests.functional import ANY, MagicMock, patch
 
 
 class TestImageMediaItem(TestCase):
@@ -38,6 +38,7 @@ class TestImageMediaItem(TestCase):
     def setUp(self):
         self.mocked_main_window = MagicMock()
         Registry.create()
+        Registry().register('application', MagicMock())
         Registry().register('service_list', MagicMock())
         Registry().register('main_window', self.mocked_main_window)
         Registry().register('live_controller', MagicMock())
@@ -45,6 +46,43 @@ class TestImageMediaItem(TestCase):
         with patch('openlp.plugins.images.lib.mediaitem.MediaManagerItem._setup'), \
                 patch('openlp.plugins.images.lib.mediaitem.ImageMediaItem.setup_item'):
             self.media_item = ImageMediaItem(None, mocked_plugin)
+            self.media_item.settings_section = 'images'
+
+    def validate_and_load_test(self):
+        """
+        Test that the validate_and_load_test() method
+        """
+        # GIVEN: A list of files
+        file_list = ['/path1/image1.jpg', '/path2/image2.jpg']
+
+        with patch('openlp.plugins.images.lib.mediaitem.ImageMediaItem.load_list') as mocked_load_list, \
+            patch('openlp.plugins.images.lib.mediaitem.Settings') as mocked_settings:
+
+            # WHEN: Calling validate_and_load with the list of files
+            self.media_item.validate_and_load(file_list)
+
+            # THEN: load_list should have been called with the file list and None,
+            #       the dectory should have been saved to the settings
+            mocked_load_list.assert_called_once_with(file_list, None)
+            mocked_settings().setValue.assert_called_once_with(ANY, '/path1')
+
+    def validate_and_load_group_test(self):
+        """
+        Test that the validate_and_load_test() method
+        """
+        # GIVEN: A list of files
+        file_list = ['/path1/image1.jpg', '/path2/image2.jpg']
+
+        with patch('openlp.plugins.images.lib.mediaitem.ImageMediaItem.load_list') as mocked_load_list, \
+            patch('openlp.plugins.images.lib.mediaitem.Settings') as mocked_settings:
+
+            # WHEN: Calling validate_and_load with the list of files and a group
+            self.media_item.validate_and_load(file_list, 'group')
+
+            # THEN: load_list should have been called with the file list and the group name,
+            #       the dectory should have been saved to the settings
+            mocked_load_list.assert_called_once_with(file_list, 'group')
+            mocked_settings().setValue.assert_called_once_with(ANY, '/path1')
 
     def save_new_images_list_empty_list_test(self):
         """