CI: better cleanup for modules in between tests

my/core/init.py

@@ -11,6 +11,7 @@ A hook to insert user's config directory into Python's search path.
 from types import ModuleType
 
 # TODO not ideal to keep it here, but this should really be a leaf in the import tree
+# TODO maybe I don't even need it anymore?
 def assign_module(parent: str, name: str, module: ModuleType) -> None:
     import sys
     import importlib

tests/common.py

@@ -7,3 +7,14 @@ V = 'HPI_TESTS_KARLICOSS'
 skip_if_not_karlicoss = pytest.mark.skipif(
     V not in os.environ, reason=f'test only works on @karlicoss data for now. Set evn variable {V}=true to override.',
 )
+
+def reset_modules() -> None:
+    '''
+    A hack to 'unload' HPI modules, otherwise some modules might cache the config
+    TODO: a bit crap, need a better way..
+    '''
+    import sys
+    import re
+    to_unload = [m for m in sys.modules if re.match(r'my[.]?', m)]
+    for m in to_unload:
+        del sys.modules[m]

tests/config.py

@@ -40,13 +40,30 @@ def test_environment_variable(tmp_path: Path) -> None:
     cfg_file.write_text('''
 class feedly:
     pass
+class just_for_test:
+    pass
 ''')
 
     import os
-    os.environ['MY_CONFIG'] = str(tmp_path)
+    oenv = dict(os.environ)
+    try:
+        os.environ['MY_CONFIG'] = str(tmp_path)
+        # should not raise at least
+        import my.rss.feedly
 
-    # should not raise at least
-    import my.rss.feedly
+        import my.config as c
+        assert hasattr(c, 'just_for_test')
+    finally:
+        os.environ.clear()
+        os.environ.update(oenv)
+
+    import sys
+    # TODO wtf??? doesn't work without unlink... is it caching something?
+    cfg_file.unlink()
+    del sys.modules['my.config'] # meh..
+
+    import my.config as c
+    assert not hasattr(c, 'just_for_test')
 
 
 from dataclasses import dataclass
@@ -110,12 +127,7 @@ Some misc stuff
 
 
 @pytest.fixture(autouse=True)
-def reset_config():
-    # otherwise tests impact each other because of the cached my. modules...
-    # hacky, but does the trick?
-    import sys
-    import re
-    to_unload = [m for m in sys.modules if re.match(r'my[.]?', m)]
-    for m in to_unload:
-        del sys.modules[m]
+def prepare():
+    from .common import reset_modules
+    reset_modules()
     yield

tests/location.py

@@ -20,6 +20,9 @@ def test() -> None:
 
 @pytest.fixture(autouse=True)
 def prepare(tmp_path: Path):
+    from .common import reset_modules
+    reset_modules()
+
     user_config = _prepare_google_config(tmp_path)
 
     import my.core.cfg as C
@@ -39,7 +42,6 @@ def _prepare_google_config(tmp_path: Path):
     with zipfile.ZipFile(tmp_path / 'takeout.zip', 'w') as zf:
         zf.writestr('Takeout/Location History/Location History.json', track.read_bytes())
 
-    from my.cfg import config
     class google_config:
         takeout_path = tmp_path
     return google_config

tests/tz.py

@@ -77,6 +77,9 @@ def D(dstr: str) -> datetime:
 # TODO copy pasted from location.py, need to extract some common provider
 @pytest.fixture(autouse=True)
 def prepare(tmp_path: Path):
+    from .common import reset_modules
+    reset_modules()
+
     LTZ._FASTER = True
 
     from .location import _prepare_google_config