Avoid test collection import errors due to optional dependencies

baybe/exceptions.py

@@ -2,6 +2,8 @@
 
 
 ##### Warnings #####
+
+
 class UnusedObjectWarning(UserWarning):
     """
     A method or function was called with undesired arguments which indicates an
@@ -59,7 +61,7 @@ class NumericalUnderflowError(Exception):
     """A computation would lead to numerical underflow."""
 
 
-class OptionalImportError(Exception):
+class OptionalImportError(ImportError):
     """An attempt was made to import an optional but uninstalled dependency."""
 
 

pytest.ini

@@ -3,13 +3,9 @@ addopts =
     --doctest-modules 
     --ignore=examples
     --ignore=docs
-
-    ; TODO: The following modules are ignored due to optional dependencies, which
-    ;   otherwise break test collection in core test environment.
-    ;   Probably, there is a more elegant solution to it.
-    --ignore=baybe/_optional
-    --ignore=baybe/utils/chemistry.py
-    --ignore=tests/simulate_telemetry.py
+
+    ; Avoids import errors due to optional dependencies
+    --doctest-ignore-import-errors  
 testpaths = 
     baybe
     tests