Don't call a non existent function (create_slides on a service item)

There is a private fn prefixed with a "_", but it's not needed as it is run when required (hence the reason it's private). If the slide vars did need to be regenerated, `render_text_items` is the way to do it.

openlp/core/ui/servicemanager.py

@@ -1330,7 +1330,6 @@ class ServiceManager(QtWidgets.QWidget, RegistryBase, Ui_ServiceManager, LogMixi
         """
         for item_count, item in enumerate(self.service_items):
             if item['service_item'].edit_id == new_item.edit_id and item['service_item'].name == new_item.name:
-                new_item.create_slides()
                 new_item.merge(item['service_item'])
                 item['service_item'] = new_item
                 self.repaint_service_list(item_count + 1, 0)

tests/interfaces/openlp_core/ui/test_servicemanager.py

@@ -419,6 +419,21 @@ class TestServiceManager(TestCase, TestMixin):
         # THEN the on_move_selection_up function should have been called.
         self.service_manager.on_move_selection_up.assert_called_once_with()
 
+    def test_delete_selection_on_delete_key(self):
+        """
+        Test that a delete key press event calls the on_delete_from_service function
+        """
+        # GIVEN a mocked on_delete_from_service function
+        self.service_manager.on_delete_from_service = MagicMock()
+
+        # WHEN the delete key event is called
+        self.service_manager.setup_ui(self.service_manager)
+        event = QtGui.QKeyEvent(QtCore.QEvent.KeyPress, QtCore.Qt.Key_Delete, QtCore.Qt.NoModifier)
+        self.service_manager.service_manager_list.keyPressEvent(event)
+
+        # THEN the on_delete_from_service function should have been called.
+        self.service_manager.on_delete_from_service.assert_called_once_with()
+
     def _setup_service_manager_list(self):
         self.service_manager.expanded = MagicMock()
         self.service_manager.collapsed = MagicMock()
@@ -496,3 +511,35 @@ class TestServiceManager(TestCase, TestMixin):
         assert self.service_manager.service_manager_list.currentItem() == song_item, \
             'Top item should have been selected'
         self.service_manager.collapsed.assert_called_once_with(song_item)
+
+    def test_replace_service_item(self):
+        """
+        Tests that the replace_service_item function replaces items as expected
+        """
+        # GIVEN a service item list and a new item which name and edit_id match a service item
+        self.service_manager.repaint_service_list = MagicMock()
+        Registry().register('live_controller', MagicMock())
+        item1 = MagicMock()
+        item1.edit_id = 'abcd'
+        item1.name = 'itemA'
+        item2 = MagicMock()
+        item2.edit_id = 'abcd'
+        item2.name = 'itemB'
+        item3 = MagicMock()
+        item3.edit_id = 'cfgh'
+        item3.name = 'itemA'
+        self.service_manager.service_items = [
+            {'service_item': item1},
+            {'service_item': item2},
+            {'service_item': item3}
+        ]
+        new_item = MagicMock()
+        new_item.edit_id = 'abcd'
+        new_item.name = 'itemA'
+
+        # WHEN replace_service_item is called
+        self.service_manager.replace_service_item(new_item)
+
+        # THEN new_item should replace item1, and only replaces that one item
+        assert self.service_manager.service_items[0]['service_item'] == new_item
+        new_item.merge.assert_called_once_with(item1)