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Code Issues 25 Releases Wiki Activity

Refs #30446 -- Added tests for resolving output_field of CombinedExpression.

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Simon Charette 2020-08-30 22:18:55 -04:00 committed by Mariusz Felisiak
parent 0be51d2226
commit 40894f2967
1 changed files with 23 additions and 1 deletions
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24
tests/expressions/tests.py
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@ -15,7 +15,9 @@ from django.db.models import (
Min, Model, OrderBy, OuterRef, Q, StdDev, Subquery, Sum, TimeField,
UUIDField, Value, Variance, When,
)
from django.db.models.expressions import Col, Combinable, Random, RawSQL, Ref
from django.db.models.expressions import (
Col, Combinable, CombinedExpression, Random, RawSQL, Ref,
)
from django.db.models.functions import (
Coalesce, Concat, Left, Length, Lower, Substr, Upper,
)
@ -1888,6 +1890,26 @@ class CombinableTests(SimpleTestCase):
object() | Combinable()
class CombinedExpressionTests(SimpleTestCase):
def test_resolve_output_field(self):
tests = [
(IntegerField, DecimalField, DecimalField),
(DecimalField, IntegerField, DecimalField),
(IntegerField, FloatField, FloatField),
(FloatField, IntegerField, FloatField),
]
connectors = [Combinable.ADD, Combinable.SUB, Combinable.MUL, Combinable.DIV]
for lhs, rhs, combined in tests:
for connector in connectors:
with self.subTest(lhs=lhs, connector=connector, rhs=rhs, combined=combined):
expr = CombinedExpression(
Expression(lhs()),
connector,
Expression(rhs()),
)
self.assertIsInstance(expr.output_field, combined)
class ExpressionWrapperTests(SimpleTestCase):
def test_empty_group_by(self):
expr = ExpressionWrapper(Value(3), output_field=IntegerField())