Add test for recursive_update()

tests/test_cal_tools.py

@@ -19,6 +19,7 @@ from cal_tools.tools import (
     map_seq_files,
     module_index_to_qm,
     send_to_db,
+    recursive_update,
 )
 
 # AGIPD operating conditions.
@@ -471,3 +472,15 @@ def test_module_index_to_qm():
 
     with pytest.raises(AssertionError):
         module_index_to_qm(7, 5)
+
+
+def test_recursive_update():
+    tgt = {"a": {"b": 1}, "c": 2}
+    src = {"a": {"d": 3}, "e": 4}
+    assert recursive_update(tgt, src) is False
+    assert tgt == {"a": {"b": 1, "d": 3}, "c": 2, "e": 4}
+
+    tgt = {"a": {"b": 1}, "c": 2}
+    src = {"a": {"b": 3}, "e": 4}
+    assert recursive_update(tgt, src) is True
+    assert tgt == {"a": {"b": 1}, "c": 2, "e": 4}