Fix PureSystem so that runtime.publish() works for a pure XBlock.

Fix extracted from https://github.com/edx/edx-platform/pull/6035.

common/lib/xmodule/xmodule/split_test_module.py

@@ -609,6 +609,10 @@ class SplitTestDescriptor(SplitTestFields, SequenceDescriptor, StudioEditableDes
 
         Called from Studio view.
         """
+        user_service = self.runtime.service(self, 'user')
+        if user_service is None:
+            return Response()
+
         user_partition = self.get_selected_partition()
 
         changed = False

common/lib/xmodule/xmodule/tests/__init__.py

@@ -92,16 +92,36 @@ def get_test_system(course_id=SlashSeparatedCourseKey('org', 'course', 'run')):
     where `my_render_func` is a function of the form my_render_func(template, context).
 
     """
-    user = Mock(is_staff=False)
+    user = Mock(name='get_test_system.user', is_staff=False)
+
+    descriptor_system = get_test_descriptor_system(),
+
+    def get_module(descriptor):
+        """Mocks module_system get_module function"""
+        # pylint: disable=protected-access
+
+        # Unlike XBlock Runtimes or DescriptorSystems,
+        # each XModule is provided with a new ModuleSystem.
+        # Construct one for the new XModule.
+        module_system = get_test_system()
+
+        # Descriptors can all share a single DescriptorSystem.
+        # So, bind to the same one as the current descriptor.
+        module_system.descriptor_runtime = descriptor.runtime._descriptor_system
+
+        descriptor.bind_for_student(module_system, descriptor._field_data)
+
+        return descriptor
+
     return TestModuleSystem(
         static_url='/static',
-        track_function=Mock(),
-        get_module=Mock(),
+        track_function=Mock(name='get_test_system.track_function'),
+        get_module=get_module,
         render_template=mock_render_template,
         replace_urls=str,
         user=user,
         get_real_user=lambda(__): user,
-        filestore=Mock(),
+        filestore=Mock(name='get_test_system.filestore'),
         debug=True,
         hostname="edx.org",
         xqueue={
@@ -109,16 +129,16 @@ def get_test_system(course_id=SlashSeparatedCourseKey('org', 'course', 'run')):
             'callback_url': '/',
             'default_queuename': 'testqueue',
             'waittime': 10,
-            'construct_callback': Mock(side_effect="/"),
+            'construct_callback': Mock(name='get_test_system.xqueue.construct_callback', side_effect="/"),
         },
         node_path=os.environ.get("NODE_PATH", "/usr/local/lib/node_modules"),
         anonymous_student_id='student',
         open_ended_grading_interface=open_ended_grading_interface,
         course_id=course_id,
         error_descriptor_class=ErrorDescriptor,
-        get_user_role=Mock(is_staff=False),
-        descriptor_runtime=get_test_descriptor_system(),
-        user_location=Mock(),
+        get_user_role=Mock(name='get_test_system.get_user_role', is_staff=False),
+        user_location=Mock(name='get_test_system.user_location'),
+        descriptor_runtime=descriptor_system,
     )
 
 
@@ -128,15 +148,17 @@ def get_test_descriptor_system():
     """
     field_data = DictFieldData({})
 
-    return MakoDescriptorSystem(
-        load_item=Mock(),
-        resources_fs=Mock(),
-        error_tracker=Mock(),
+    descriptor_system = MakoDescriptorSystem(
+        load_item=Mock(name='get_test_descriptor_system.load_item'),
+        resources_fs=Mock(name='get_test_descriptor_system.resources_fs'),
+        error_tracker=Mock(name='get_test_descriptor_system.error_tracker'),
         render_template=mock_render_template,
         mixins=(InheritanceMixin, XModuleMixin),
         field_data=field_data,
         services={'field-data': field_data},
     )
+    descriptor_system.get_asides = lambda block: []
+    return descriptor_system
 
 
 def mock_render_template(*args, **kwargs):

common/lib/xmodule/xmodule/tests/test_conditional.py

@@ -64,14 +64,14 @@ class ConditionalFactory(object):
                 error_msg='random error message'
             )
         else:
-            source_descriptor = Mock()
+            source_descriptor = Mock(name='source_descriptor')
             source_descriptor.location = source_location
 
         source_descriptor.runtime = descriptor_system
         source_descriptor.render = lambda view, context=None: descriptor_system.render(source_descriptor, view, context)
 
         # construct other descriptors:
-        child_descriptor = Mock()
+        child_descriptor = Mock(name='child_descriptor')
         child_descriptor._xmodule.student_view.return_value.content = u'<p>This is a secret</p>'
         child_descriptor.student_view = child_descriptor._xmodule.student_view
         child_descriptor.displayable_items.return_value = [child_descriptor]
@@ -85,6 +85,8 @@ class ConditionalFactory(object):
             source_location: source_descriptor
         }.get
 
+        system.descriptor_runtime = descriptor_system
+
         # construct conditional module:
         cond_location = Location("edX", "conditional_test", "test_run", "conditional", "SampleConditional", None)
         field_data = DictFieldData({

common/lib/xmodule/xmodule/tests/test_split_test_module.py

@@ -47,15 +47,7 @@ class SplitTestModuleTest(XModuleXmlImportTest, PartitionTestCase):
         self.course_sequence = self.course.get_children()[0]
         self.module_system = get_test_system()
 
-        def get_module(descriptor):
-            """Mocks module_system get_module function"""
-            module_system = get_test_system()
-            module_system.get_module = get_module
-            descriptor.bind_for_student(module_system, descriptor._field_data)  # pylint: disable=protected-access
-            return descriptor
-
-        self.module_system.get_module = get_module
-        self.module_system.descriptor_system = self.course.runtime
+        self.module_system.descriptor_runtime = self.course.runtime._descriptor_system  # pylint: disable=protected-access
         self.course.runtime.export_fs = MemoryFS()
 
         self.partitions_service = StaticPartitionService(
@@ -97,14 +89,12 @@ class SplitTestModuleLMSTest(SplitTestModuleTest):
             self.module_system.render(self.split_test_module, STUDENT_VIEW).content
         )
 
-    @ddt.data((0,), (1,))
-    @ddt.unpack
+    @ddt.data(0, 1)
     def test_child_missing_tag_value(self, _user_tag):
         # If user_tag has a missing value, we should still get back a valid child url
         self.assertIn(self.split_test_module.child_descriptor.url_name, ['split_test_cond0', 'split_test_cond1'])
 
-    @ddt.data((100,), (200,), (300,), (400,), (500,), (600,), (700,), (800,), (900,), (1000,))
-    @ddt.unpack
+    @ddt.data(100, 200, 300, 400, 500, 600, 700, 800, 900, 1000)
     def test_child_persist_new_tag_value_when_tag_missing(self, _user_tag):
         # If a user_tag has a missing value, a group should be saved/persisted for that user.
         # So, we check that we get the same url_name when we call on the url_name twice.

common/lib/xmodule/xmodule/tests/test_vertical.py

@@ -27,15 +27,7 @@ class BaseVerticalModuleTest(XModuleXmlImportTest):
         course_seq = self.course.get_children()[0]
         self.module_system = get_test_system()
 
-        def get_module(descriptor):
-            """Mocks module_system get_module function"""
-            module_system = get_test_system()
-            module_system.get_module = get_module
-            descriptor.bind_for_student(module_system, descriptor._field_data)  # pylint: disable=protected-access
-            return descriptor
-
-        self.module_system.get_module = get_module
-        self.module_system.descriptor_system = self.course.runtime
+        self.module_system.descriptor_runtime = self.course.runtime._descriptor_system  # pylint: disable=protected-access
         self.course.runtime.export_fs = MemoryFS()
 
         self.vertical = course_seq.get_children()[0]

lms/djangoapps/courseware/tests/__init__.py

@@ -57,17 +57,7 @@ class BaseTestXmodule(ModuleStoreTestCase):
         """
         Generate a new ModuleSystem that is minimally set up for testing
         """
-        runtime = get_test_system(course_id=self.course.id)
-
-        # When asked for a module out of a descriptor, just create a new xmodule runtime,
-        # and inject it into the descriptor
-        def get_module(descr):
-            descr.xmodule_runtime = self.new_module_runtime()
-            return descr
-
-        runtime.get_module = get_module
-
-        return runtime
+        return get_test_system(course_id=self.course.id)
 
     def new_descriptor_runtime(self):
         runtime = get_test_descriptor_system()

lms/djangoapps/courseware/tests/test_module_render.py

@@ -51,11 +51,17 @@ class PureXBlock(XBlock):
     pass
 
 
-class EmptyXModule(XModule):
+class EmptyXModule(XModule):  # pylint: disable=abstract-method
+    """
+    Empty XModule for testing with no dependencies.
+    """
     pass
 
 
-class EmptyXModuleDescriptor(XModuleDescriptor):
+class EmptyXModuleDescriptor(XModuleDescriptor):  # pylint: disable=abstract-method
+    """
+    Empty XModule for testing with no dependencies.
+    """
     module_class = EmptyXModule
 
 
@@ -1118,6 +1124,9 @@ class TestRebindModule(TestSubmittingProblems):
 @ddt.ddt
 @override_settings(MODULESTORE=TEST_DATA_MOCK_MODULESTORE)
 class TestEventPublishing(ModuleStoreTestCase, LoginEnrollmentTestCase):
+    """
+    Tests of event publishing for both XModules and XBlocks.
+    """
 
     def setUp(self):
         """
@@ -1138,7 +1147,7 @@ class TestEventPublishing(ModuleStoreTestCase, LoginEnrollmentTestCase):
         request.user = self.mock_user
         course = CourseFactory()
         descriptor = ItemFactory(category=block_type, parent=course)
-        field_data_cache = FieldDataCache([course, descriptor], course.id, self.mock_user)
+        field_data_cache = FieldDataCache([course, descriptor], course.id, self.mock_user)  # pylint: disable=no-member
         block = render.get_module(self.mock_user, request, descriptor.location, field_data_cache)
 
         event_type = 'event_type'
@@ -1148,8 +1157,4 @@ class TestEventPublishing(ModuleStoreTestCase, LoginEnrollmentTestCase):
 
         mock_track_function.assert_called_once_with(request)
 
-        if block_type == 'xblock':
-            self.assertFalse(mock_track_function.return_value.called)
-        else:
-            mock_track_function.return_value.assert_called_once_with(event_type, event)
-
+        mock_track_function.return_value.assert_called_once_with(event_type, event)