Add test that checks the validity of the namefilters

tests/Settings/TestContainerManager.py

@@ -11,8 +11,13 @@ class TestContainerManager(TestCase):
         self._container_registry = MagicMock()
         self._machine_manager = MagicMock()
 
+        self._mocked_mime = MagicMock()
+        self._mocked_mime.preferredSuffix = "omg"
+        self._mocked_mime.comment = "UnitTest!"
+
         self._containers_meta_data = [{"id": "test", "test_data": "omg"}]
         self._container_registry.findContainersMetadata = MagicMock(return_value = self._containers_meta_data)
+        self._container_registry.getMimeTypeForContainer = MagicMock(return_value = self._mocked_mime)
 
         self._application.getContainerRegistry = MagicMock(return_value = self._container_registry)
         self._application.getMachineManager = MagicMock(return_value = self._machine_manager)
@@ -30,3 +35,11 @@ class TestContainerManager(TestCase):
     def test_clearUserContainer(self):
         self._container_manager.clearUserContainers()
         assert self._machine_manager.activeMachine.userChanges.clear.call_count == 1
+
+    def test_getContainerNameFilters(self):
+        # If nothing is added, we still expect to get the all files filter
+        assert self._container_manager.getContainerNameFilters("") == ['All Files (*)']
+
+        # Pretend that a new type was added.
+        self._container_registry.getContainerTypes = MagicMock(return_value=[("None", None)])
+        assert self._container_manager.getContainerNameFilters("") == ['UnitTest! (*.omg)', 'All Files (*)']