feat: add support for --runas CLI param, to set versioning authorship

only relevant if Wutta-Continuum is enabled

tests/cli/test_base.py

@@ -2,7 +2,7 @@
 
 import inspect
 from unittest import TestCase
-from unittest.mock import patch
+from unittest.mock import patch, Mock
 
 from wuttasync.cli import base as mod
 from wuttjamaican.testing import DataTestCase
@@ -44,12 +44,20 @@ class TestImportCommandHandler(DataTestCase):
         )
 
         with patch.object(handler, "list_models") as list_models:
-            handler.run({"list_models": True})
-            list_models.assert_called_once_with({"list_models": True})
+            ctx = Mock(params={"list_models": True})
+            handler.run(ctx)
+            list_models.assert_called_once_with(ctx.params)
+
+        class Object:
+            def __init__(self, **kw):
+                self.__dict__.update(kw)
 
         with patch.object(handler, "import_handler") as import_handler:
-            handler.run({"models": []})
-            import_handler.process_data.assert_called_once_with()
+            parent = Mock(params={"runas_username": "fred"})
+            # TODO: why can't we just use Mock here? the parent attr is problematic
+            ctx = Object(params={"models": []}, parent=parent)
+            handler.run(ctx)
+            import_handler.process_data.assert_called_once_with(runas_username="fred")
 
     def test_list_models(self):
         handler = self.make_handler(