reset current egraph after tests

Author: saulshanabrook

python/tests/conftest.py

@@ -4,6 +4,7 @@
 from syrupy.extensions.single_file import SingleFileSnapshotExtension
 
 import egglog.conversion
+import egglog.exp.array_api
 
 
 @pytest.fixture(autouse=True)
@@ -15,6 +16,12 @@ def _reset_conversions():
     egglog.conversion._TO_PROCESS_DECLS = old_conversion_decls
 
 
+@pytest.fixture(autouse=True)
+def _reset_current_egraph():
+    yield
+    egglog.exp.array_api._CURRENT_EGRAPH = None
+
+
 class PythonSnapshotExtension(SingleFileSnapshotExtension):
     _file_extension = "py"