Implement dir on skill collections

skillbridge/client/objects.py

@@ -223,6 +223,10 @@ def __setitem__(self, key: Skill, value: Skill) -> None:
     def __delitem__(self, item: Skill) -> None:
         self._call('remove', item, self)
 
+    def __dir__(self) -> list[str]:
+        response = self._channel.send(self._translator.encode_dir(self._variable))
+        return self._translator.decode_dir(response)
+
 
 class RemoteTable(RemoteCollection, MutableMapping[Skill, Skill]):
     def __getitem__(self, item: Skill) -> Skill:

tests/test_integration.py

@@ -17,7 +17,6 @@ def ws() -> Workspace:
     except (Exception, ValueError, AssertionError):
         warn("Skipping integration tests, because Workspace could not connect", UserWarning)
         skip()
-        raise  # this line is unreachable but mypy and pycharm don't know that
 
     return workspace
 
@@ -235,3 +234,8 @@ def test_run_script_blocks_when_requested(ws: Workspace) -> None:
     assert ws['pyRunScript'](str(here / 'script.py'), args=(variable, '42', '0.25'), block=True)
 
     assert ws['plus'](Var(variable), 1) == 43
+
+
+def test_form_vectors_have_dir(ws: Workspace) -> None:
+    form = ws.hi.get_current_form()
+    assert 'button_layout' in dir(form)