def test_custom_violation_error_message_clone(self):
constraint = BaseConstraint(
"base_name",
violation_error_message="custom %(name)s message",
).clone()
self.assertEqual(
constraint.get_violation_error_message(),
"custom base_name message",
)
def test_deconstruction(self):
constraint = BaseConstraint(
"base_name",
violation_error_message="custom %(name)s message",
)
path, args, kwargs = constraint.deconstruct()
self.assertEqual(path, "django.db.models.BaseConstraint")
self.assertEqual(args, ())
self.assertEqual(
kwargs,
{"name": "base_name", "violation_error_message": "custom %(name)s message"},
)
def test_constraint_sql(self):
c = BaseConstraint('name')
msg = 'This method must be implemented by a subclass.'
with self.assertRaisesMessage(NotImplementedError, msg):
c.constraint_sql(None, None)
def test_remove_sql(self):
c = BaseConstraint('name')
msg = 'This method must be implemented by a subclass.'
with self.assertRaisesMessage(NotImplementedError, msg):
c.remove_sql(None, None)
def test_contains_expressions(self):
c = BaseConstraint('name')
self.assertIs(c.contains_expressions, False)
def test_create_sql(self):
c = BaseConstraint("name")
msg = "This method must be implemented by a subclass."
with self.assertRaisesMessage(NotImplementedError, msg):
c.create_sql(None, None)
def test_default_violation_error_message(self):
c = BaseConstraint("name")
self.assertEqual(
c.get_violation_error_message(), "Constraint “name” is violated."
)
