1 files changed, 29 insertions, 0 deletions
diff --git a/tests/test_types.py b/tests/test_types.py
index 260167c..1efcde1 100644
--- a/tests/test_types.py
+++ b/tests/test_types.py
@@ -82,6 +82,35 @@ class testTypes(unittest.TestCase):
         v = checker.update(10)
         self.assertEqual(v, 10)
 
+    def test_datetime_auto_increment(self):
+        field_def = self._get_field_def('integer')
+        field_def['auto'] = 'increment'
+        checker = types.LesanaInt(field_def, {})
+
+        v = checker.empty()
+        self.assertEqual(v, 0)
+
+        v = checker.update(0)
+        self.assertEqual(v, 1)
+
+        field_def['increment'] = -1
+        checker = types.LesanaInt(field_def, {})
+        v = checker.update(0)
+        self.assertEqual(v, -1)
+
+        field_def['increment'] = 0.5
+        checker = types.LesanaInt(field_def, {})
+        with self.assertLogs() as cm:
+            v = checker.update(0)
+        self.assertIn('WARNING', cm.output[0])
+        self.assertIn('Invalid configuration value', cm.output[0])
+        self.assertEqual(v, 0)
+
+        field_def['auto'] = 'false'
+        checker = types.LesanaInt(field_def, {})
+        v = checker.update(0)
+        self.assertEqual(v, 0)
+
     def test_float(self):
         checker = types.LesanaFloat(self._get_field_def('float'), {})