1 files changed, 35 insertions, 0 deletions
diff --git a/tests/postgres_tests/test_constraints.py b/tests/postgres_tests/test_constraints.py
index b3822e5805..a6f7b5be85 100644
--- a/tests/postgres_tests/test_constraints.py
+++ b/tests/postgres_tests/test_constraints.py
@@ -123,6 +123,41 @@ class SchemaTests(PostgreSQLTestCase):
             timestamps_inner=(datetime_1, datetime_2),
         )
 
+    def test_check_constraint_range_contains(self):
+        constraint = CheckConstraint(
+            check=Q(ints__contains=(1, 5)),
+            name="ints_contains",
+        )
+        msg = f"Constraint “{constraint.name}” is violated."
+        with self.assertRaisesMessage(ValidationError, msg):
+            constraint.validate(RangesModel, RangesModel(ints=(6, 10)))
+
+    def test_check_constraint_range_lower_upper(self):
+        constraint = CheckConstraint(
+            check=Q(ints__startswith__gte=0) & Q(ints__endswith__lte=99),
+            name="ints_range_lower_upper",
+        )
+        msg = f"Constraint “{constraint.name}” is violated."
+        with self.assertRaisesMessage(ValidationError, msg):
+            constraint.validate(RangesModel, RangesModel(ints=(-1, 20)))
+        with self.assertRaisesMessage(ValidationError, msg):
+            constraint.validate(RangesModel, RangesModel(ints=(0, 100)))
+        constraint.validate(RangesModel, RangesModel(ints=(0, 99)))
+
+    def test_check_constraint_range_lower_with_nulls(self):
+        constraint = CheckConstraint(
+            check=Q(ints__isnull=True) | Q(ints__startswith__gte=0),
+            name="ints_optional_positive_range",
+        )
+        constraint.validate(RangesModel, RangesModel())
+        constraint = CheckConstraint(
+            check=Q(ints__startswith__gte=0),
+            name="ints_positive_range",
+        )
+        msg = f"Constraint “{constraint.name}” is violated."
+        with self.assertRaisesMessage(ValidationError, msg):
+            constraint.validate(RangesModel, RangesModel())
+
     def test_opclass(self):
         constraint = UniqueConstraint(
             name="test_opclass",