Convert UUID to string in mock_NWBFile (#1557)

* Fix #1556 Convert UUID to string in mock_NWBFile
NeurodataWithoutBorders · Sep 23, 2022 · 787afc7 · 787afc7
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diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -1,5 +1,11 @@
 # PyNWB Changelog
 
+## PyNWB 2.1.2 (Upcoming)
+
+### Bug fixes
+- Fixed bug in ``pynwb.testing.mock.file.mock_NWBFile`` to identifier UUID to string. @oruebel
+  [#1557](https://github.com/NeurodataWithoutBorders/pynwb/pull/1557)
+
 ## PyNWB 2.1.1 (September 1, 2022)
 
 ### Documentation and tutorial enhancements:

diff --git a/src/pynwb/testing/mock/file.py b/src/pynwb/testing/mock/file.py
@@ -14,7 +14,7 @@ def mock_NWBFile(
 ):
     return NWBFile(
         session_description=session_description,
-        identifier=identifier or uuid4(),
+        identifier=identifier or str(uuid4()),
         session_start_time=session_start_time,
         subject=subject or mock_Subject(),
         **kwargs