fix: fix 'inconsistent-return-statements' for pylint

tests/db/model/test_batch.py

@@ -27,6 +27,10 @@ else:
             batch = MyBatch(id=42, uuid=_uuid.UUID('0675cdac-ffc9-7690-8000-6023de1c8cfd'))
             self.assertEqual(repr(batch), "MyBatch(uuid=UUID('0675cdac-ffc9-7690-8000-6023de1c8cfd'))")
             self.assertEqual(str(batch), "00000042")
+            self.assertEqual(batch.id_str, "00000042")
+
+            batch2 = MyBatch()
+            self.assertIsNone(batch2.id_str)
 
 
     class TestBatchRowMixin(DataTestCase):

tests/db/test_util.py

@@ -22,9 +22,11 @@ else:
         def test_dict_behavior(self):
             setting = Setting()
             self.assertEqual(list(iter(setting)), [('name', None), ('value', None)])
+            self.assertIsNone(setting.name)
             self.assertIsNone(setting['name'])
             setting.name = 'foo'
             self.assertEqual(setting['name'], 'foo')
+            self.assertRaises(KeyError, lambda: setting['notfound'])
 
 
     class TestUUID(TestCase):

tests/test_app.py

@@ -375,6 +375,10 @@ app_title = WuttaTest
         ver = self.app.get_version(obj=query)
         self.assertEqual(ver, version('SQLAlchemy'))
 
+        # random object will not yield a dist nor version
+        ver = self.app.get_version(obj=42)
+        self.assertIsNone(ver)
+
         # can override dist via config
         self.config.setdefault('wuttatest.app_dist', 'python-configuration')
         ver = self.app.get_version()

tests/test_reports.py

@@ -94,6 +94,10 @@ class TestReportHandler(ConfigTestCase):
             self.assertTrue(issubclass(report, mod.Report))
             self.assertIs(report, MockFooReport)
 
+            # not found
+            report = handler.get_report('unknown')
+            self.assertIsNone(report)
+
     def test_make_report_data(self):
         providers = {
             'wuttatest': MagicMock(report_modules=['tests.test_reports']),