Refs #6767 -- Added test for fetching decimal values without rounding error on Oracle.

tests/model_fields/test_decimalfield.py

@@ -1,8 +1,10 @@
+import unittest
+
 from decimal import Decimal
 
 from django.core import validators
 from django.core.exceptions import ValidationError
-from django.db import models
+from django.db import connection, models
 from django.test import TestCase
 
 from .models import BigD, Foo
@@ -49,6 +51,12 @@ class DecimalFieldTests(TestCase):
         bd = BigD.objects.get(pk=bd.pk)
         self.assertEqual(bd.d, Decimal('12.9'))
 
+    @unittest.skipIf(connection.vendor == 'sqlite', 'SQLite stores values rounded to 15 significant digits.')
+    def test_fetch_from_db_without_float_rounding(self):
+        big_decimal = BigD.objects.create(d=Decimal('.100000000000000000000000000005'))
+        big_decimal.refresh_from_db()
+        self.assertEqual(big_decimal.d, Decimal('.100000000000000000000000000005'))
+
     def test_lookup_really_big_value(self):
         """
         Really big values can be used in a filter statement.