Make sure inferring works even if a stub doesn't have all variables defined

jedi/evaluate/finder.py

@@ -29,6 +29,7 @@ from jedi.evaluate.filters import get_global_filters
 from jedi.evaluate.names import TreeNameDefinition
 from jedi.evaluate.base_context import ContextSet, NO_CONTEXTS
 from jedi.parser_utils import is_scope, get_parent_scope
+from jedi.evaluate.gradual.conversion import stub_to_actual_context_set
 
 
 class NameFinder(object):
@@ -116,7 +117,17 @@ class NameFinder(object):
 
             return get_global_filters(self._evaluator, self._context, position, origin_scope)
         else:
-            return self._context.get_filters(search_global, self._position, origin_scope=origin_scope)
+            return self._get_context_filters(origin_scope)
+
+    def _get_context_filters(self, origin_scope):
+        for f in self._context.get_filters(False, self._position, origin_scope=origin_scope):
+            yield f
+        # This covers the case where a stub files are incomplete.
+        if self._context.is_stub():
+            contexts = stub_to_actual_context_set(self._context, ignore_compiled=True)
+            for c in contexts:
+                for f in c.get_filters():
+                    yield f
 
     def filter_name(self, filters):
         """

test/completion/stubs.py

@@ -8,7 +8,7 @@ from stub_folder import with_stub, stub_only, with_stub_folder, stub_only_folder
 stub_only.in_stub_only
 #? str()
 with_stub.in_with_stub_both
-#?
+#? int()
 with_stub.in_with_stub_python
 #? float()
 with_stub.in_with_stub_stub
@@ -22,7 +22,7 @@ with_stub.in_with_stub_stub
 stub_only_folder.in_stub_only_folder
 #? str()
 with_stub_folder.in_with_stub_both_folder
-#?
+#? int()
 with_stub_folder.in_with_stub_python_folder
 #? float()
 with_stub_folder.in_with_stub_stub_folder
@@ -38,7 +38,7 @@ from stub_folder.with_stub_folder import nested_stub_only, nested_with_stub, \
 nested_stub_only.in_stub_only
 #? float()
 nested_with_stub.in_both
-#?
+#? str()
 nested_with_stub.in_python
 #? int()
 nested_with_stub.in_stub
@@ -56,7 +56,7 @@ from stub_folder.stub_only_folder import nested_stub_only, nested_with_stub, \
 nested_stub_only.in_stub_only
 #? float()
 nested_with_stub.in_both
-#?
+#? str()
 nested_with_stub.in_python
 #? int()
 nested_with_stub.in_stub

test/test_evaluate/test_gradual/test_stub_loading.py

@@ -16,7 +16,7 @@ def ScriptInStubFolder(Script):
     ('code', 'expected'), [
         ('from no_python import foo', ['int']),
         ('from with_python import stub_only', ['str']),
-        ('from with_python import python_only', []),
+        ('from with_python import python_only', ['int']),
         ('from with_python import both', ['int']),
         ('from with_python import something_random', []),
         ('from with_python.module import in_sub_module', ['int']),