[unittest] Ensure yaml2ck handles notes correctly

test/data/species-names.yaml

@@ -76,6 +76,7 @@ species:
       -1.02466476e+04, -4.64130376]
     - [0.074851495, 0.0133909467, -5.73285809e-06, 1.22292535e-09, -1.0181523e-13,
       -9468.34459, 18.437318]
+    note: 120521 # string incidentally serialized as integer
 - name: plus
   composition: {C: 1, H: 4}
   thermo:
@@ -86,6 +87,7 @@ species:
       -1.02466476e+04, -4.64130376]
     - [0.074851495, 0.0133909467, -5.73285809e-06, 1.22292535e-09, -1.0181523e-13,
       -9468.34459, 18.437318]
+    note: 12.05 # string incidentally serialized as float
 - name: trans_butene
   composition: {C: 1, H: 4}
   thermo:

test/python/test_convert.py

@@ -780,6 +780,25 @@ def test_write_chemkin(self):
         self.check_kinetics(ck_phase, yaml_phase, [900, 1800], [2e5, 20e5], tol=2e-7)
         self.check_transport(ck_phase, yaml_phase, [298, 1001, 2400])
 
+    def test_write_notes(self):
+        input_file = self.test_data_path / 'species-names.yaml'
+        yaml_phase = ct.Solution(input_file)
+        assert yaml_phase.species("eq=uals").input_data["thermo"]["note"] == 120521
+        assert yaml_phase.species("plus").input_data["thermo"]["note"] == 12.05
+
+        ck_file = self.test_work_path / 'species-names.ck'
+        ck_file.unlink(missing_ok=True)
+        yaml_phase.write_chemkin(ck_file, quiet=True)
+
+        yaml_file = self.test_work_path / 'species-names.yaml'
+        yaml_file.unlink(missing_ok=True)
+        ck2yaml.convert(ck_file, out_name=yaml_file, quiet=True)
+        assert yaml_file.exists()
+
+        ck_phase = ct.Solution(yaml_file)
+        assert ck_phase.species("eq=uals").input_data["thermo"]["note"] == "120521"
+        assert ck_phase.species("plus").input_data["thermo"]["note"] == "12.05"
+
 
 class cti2yamlTest(utilities.CanteraTest):
     def convert(self, basename, src_dir=None, encoding=None):