Fix quite a few more tests. Only about a fifth failing now

jedi/inference/gradual/stub_value.py

@@ -3,6 +3,7 @@ from jedi.inference.value.module import ModuleValue
 from jedi.inference.filters import ParserTreeFilter, \
     TreeNameDefinition
 from jedi.inference.gradual.typing import TypingModuleFilterWrapper
+from jedi.inference.context import ModuleContext
 
 
 class StubModuleValue(ModuleValue):
@@ -58,6 +59,17 @@ class TypingModuleWrapper(StubModuleValue):
         for f in filters:
             yield f
 
+    def as_context(self):
+        return TypingModuleContext(self)
+
+
+class TypingModuleContext(ModuleContext):
+    def get_filters(self, *args, **kwargs):
+        filters = super(TypingModuleContext, self).get_filters(*args, **kwargs)
+        yield TypingModuleFilterWrapper(next(filters))
+        for f in filters:
+            yield f
+
 
 # From here on down we make looking up the sys.version_info fast.
 class _StubName(TreeNameDefinition):

jedi/inference/gradual/typing.py

@@ -222,7 +222,7 @@ class TypingClassValue(_TypingClassMixin, TypingValue, ClassMixin):
     index_class = TypingClassValueWithIndex
 
 
-def _iter_over_arguments(maybe_tuple_value, defining_value):
+def _iter_over_arguments(maybe_tuple_value, defining_context):
     def iterate():
         if isinstance(maybe_tuple_value, SequenceLiteralValue):
             for lazy_value in maybe_tuple_value.py__iter__(valueualized_node=None):
@@ -234,9 +234,9 @@ def _iter_over_arguments(maybe_tuple_value, defining_value):
         for value in value_set:
             if is_string(value):
                 from jedi.inference.gradual.annotation import _get_forward_reference_node
-                node = _get_forward_reference_node(defining_value, value.get_safe_value())
+                node = _get_forward_reference_node(defining_context, value.get_safe_value())
                 if node is not None:
-                    for c in defining_value.infer_node(node):
+                    for c in defining_context.infer_node(node):
                         yield c
             else:
                 yield value