Refs #29738 -- Added test for serializing psycopg2's NumericRange with DecimalRangeField in migrations.

tests/postgres_tests/test_apps.py

@@ -1,3 +1,5 @@
+from decimal import Decimal
+
 from django.db.backends.signals import connection_created
 from django.db.migrations.writer import MigrationWriter
 from django.test.utils import modify_settings
@@ -10,7 +12,8 @@ try:
     )
 
     from django.contrib.postgres.fields import (
-        DateRangeField, DateTimeRangeField, IntegerRangeField,
+        DateRangeField, DateTimeRangeField, DecimalRangeField,
+        IntegerRangeField,
     )
 except ImportError:
     pass
@@ -29,6 +32,7 @@ class PostgresConfigTests(PostgreSQLTestCase):
             (DateRange(empty=True), DateRangeField),
             (DateTimeRange(empty=True), DateRangeField),
             (DateTimeTZRange(None, None, '[]'), DateTimeRangeField),
+            (NumericRange(Decimal('1.0'), Decimal('5.0'), '()'), DecimalRangeField),
             (NumericRange(1, 10), IntegerRangeField),
         )