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-rw-r--r--tests/db_functions/math/test_cot.py5
1 files changed, 5 insertions, 0 deletions
diff --git a/tests/db_functions/math/test_cot.py b/tests/db_functions/math/test_cot.py
index 0407f3b45d..5af0403221 100644
--- a/tests/db_functions/math/test_cot.py
+++ b/tests/db_functions/math/test_cot.py
@@ -11,6 +11,11 @@ from ..models import DecimalModel, FloatModel, IntegerModel
class CotTests(TestCase):
+ def test_null(self):
+ IntegerModel.objects.create()
+ obj = IntegerModel.objects.annotate(null_cot=Cot('normal')).first()
+ self.assertIsNone(obj.null_cot)
+
def test_decimal(self):
DecimalModel.objects.create(n1=Decimal('-12.9'), n2=Decimal('0.6'))
obj = DecimalModel.objects.annotate(n1_cot=Cot('n1'), n2_cot=Cot('n2')).first()