Make sure that the definition order in stubs are ignored

jedi/inference/gradual/stub_value.py

@@ -51,6 +51,16 @@ class StubModuleValue(ModuleValue):
         for f in filters:
             yield f
 
+    def _as_context(self):
+        return StubModuleContext(self)
+
+
+class StubModuleContext(ModuleContext):
+    def get_filters(self, until_position=None, origin_scope=None):
+        # Make sure to ignore the position, because positions are not relevant
+        # for stubs.
+        return super(StubModuleContext, self).get_filters(origin_scope=origin_scope)
+
 
 class TypingModuleWrapper(StubModuleValue):
     def get_filters(self, *args, **kwargs):

test/completion/stub_folder/stub_only.pyi

@@ -1 +1,9 @@
 in_stub_only: int
+
+
+class Foo(Bar):
+    pass
+
+
+class Bar:
+    pass

test/test_inference/test_gradual/test_conversion.py

@@ -38,3 +38,19 @@ def test_conversion_of_stub_only(Script):
     assert d2.line == d1.line
     assert d2.column == d1.column
     assert d2.name == 'in_stub_only'
+
+
+def test_goto_on_file(Script):
+    project = Project(os.path.join(root_dir, 'test', 'completion', 'stub_folder'))
+    script = Script('import stub_only; stub_only.Foo', _project=project)
+    d1, = script.goto_assignments()
+    v, = d1._name.infer()
+    foo, bar, obj = v.py__mro__()
+    assert foo.py__name__() == 'Foo'
+    assert bar.py__name__() == 'Bar'
+    assert obj.py__name__() == 'object'
+
+    # Make sure we go to Bar, because Foo is a bit before: `class Foo(Bar):`
+    script = Script(path=d1.module_path, line=d1.line, column=d1.column + 4, _project=project)
+    d2, = script.goto_assignments()
+    assert d2.name == 'Bar'