general: move reddit tests into my/tests + tweak my.core.cfg to be more reliable

my/tests/common.py

@@ -0,0 +1,29 @@
+import os
+from pathlib import Path
+import re
+import sys
+
+import pytest
+
+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..
+    '''
+    to_unload = [m for m in sys.modules if re.match(r'my[.]?', m)]
+    for m in to_unload:
+        del sys.modules[m]
+
+
+def testdata() -> Path:
+    d = Path(__file__).absolute().parent.parent.parent / 'testdata'
+    assert d.exists(), d
+    return d