Fixed #26555 -- Gave deconstructible objects a higher priority during serialization

1 files changed, 22 insertions, 0 deletions

diff --git a/tests/migrations/test_writer.py b/tests/migrations/test_writer.py
index 6c121e0904..8febf40f03 100644
--- a/tests/migrations/test_writer.py
+++ b/tests/migrations/test_writer.py
@@ -2,6 +2,7 @@
 from __future__ import unicode_literals
 
 import datetime
+import decimal
 import functools
 import math
 import os
@@ -35,6 +36,15 @@ except ImportError:
     enum = None
 
 
+class Money(decimal.Decimal):
+    def deconstruct(self):
+        return (
+            '%s.%s' % (self.__class__.__module__, self.__class__.__name__),
+            [six.text_type(self)],
+            {}
+        )
+
+
 class TestModel1(object):
     def upload_to(self):
         return "somewhere dynamic"
@@ -200,6 +210,18 @@ class WriterTests(SimpleTestCase):
         self.assertTrue(math.isinf(self.serialize_round_trip(float("-inf"))))
         self.assertTrue(math.isnan(self.serialize_round_trip(float("nan"))))
 
+        self.assertSerializedEqual(decimal.Decimal('1.3'))
+        self.assertSerializedResultEqual(
+            decimal.Decimal('1.3'),
+            ("Decimal('1.3')", {'from decimal import Decimal'})
+        )
+
+        self.assertSerializedEqual(Money('1.3'))
+        self.assertSerializedResultEqual(
+            Money('1.3'),
+            ("migrations.test_writer.Money('1.3')", {'import migrations.test_writer'})
+        )
+
     def test_serialize_constants(self):
         self.assertSerializedEqual(None)
         self.assertSerializedEqual(True)