pytest_runtest_teardown runs now a proper clean up

conftest.py

@@ -3,11 +3,23 @@ import shutil
 
 
 def pytest_runtest_teardown(item, nextitem):
+    """
+    Teardown method to clean up folder creations during testing. This method is called after each test, but performs
+    deletions only after an entire test class was executed.
+    :param item: tested item
+    :param nextitem: next item (could be None, if no following test is available)
+    """
     if nextitem is None or item.cls != nextitem.cls:
-        print(f"\nnew class: {item.cls} -> {nextitem.cls if nextitem else None}")
-        print(f"\n{nextitem.fspath.dirname}")
-        if "data" in os.listdir(item.fspath.dirname):
-            print("found data")
-            shutil.rmtree(os.path.join(item.fspath.dirname, "data"), ignore_errors=True)
+        # clean up all TestExperiment and data folder that have been created during testing
+        rel_path = os.path.relpath(item.fspath.dirname, os.path.abspath(__file__))
+        path = os.path.dirname(__file__)
+        for stage in filter(None, rel_path.replace("..", ".").split("/")):
+            path = os.path.abspath(os.path.join(path, stage))
+            list_dir = os.listdir(path)
+            if "data" in list_dir and path != os.path.dirname(__file__):  # do not delete data folder in src
+                shutil.rmtree(os.path.join(path, "data"), ignore_errors=True)
+            if "TestExperiment" in list_dir:
+                shutil.rmtree(os.path.join(path, "TestExperiment"), ignore_errors=True)
     else:
-        print(f"\nsame class: {item.cls} == {nextitem.cls}")
+        pass  # nothing to do if next test is from same test class
+