core/modules: switch away from using override_config to tmp_config in some tests & faka data generators

my/rescuetime.py

@@ -58,22 +58,27 @@ def stats() -> Stats:
 
 # basically, hack config and populate it with fake data? fake data generated by DAL, but the rest is handled by this?
 
-from typing import Iterator
 from contextlib import contextmanager
+from typing import Iterator
 # todo take seed, or what?
 @contextmanager
-def fake_data(rows: int=1000) -> Iterator[None]:
+def fake_data(rows: int=1000) -> Iterator:
     # todo also disable cachew automatically for such things?
-    from .core.cachew import disabled_cachew
-    from .core.cfg import override_config
+    from my.core.cfg import tmp_config
+    from my.core.cachew import disabled_cachew
     from tempfile import TemporaryDirectory
-    with disabled_cachew(), override_config(config) as cfg, TemporaryDirectory() as td:
+    import json
+    with disabled_cachew(), TemporaryDirectory() as td:
         tdir = Path(td)
-        cfg.export_path = tdir
         f = tdir / 'rescuetime.json'
-        import json
         f.write_text(json.dumps(dal.fake_data_generator(rows=rows)))
-        yield
+
+        class override:
+            class rescuetime:
+                export_path = tdir
+
+        with tmp_config(modules=__name__, config=override) as cfg:
+            yield cfg
 # TODO ok, now it's something that actually could run on CI!
 # todo would be kinda nice if doctor could run against the fake data, to have a basic health check of the module?