def test3(self):
"""
An exception must be thrown when a stored routine with designation type singleton0 returns more than 1 values.
"""
with self.assertRaises(DataError):
DataLayer.tst_test_singleton0a(2)
def test1(self):
"""
Stored routine with designation type singleton0 must return null.
"""
ret = DataLayer.tst_test_singleton0a(0)
self.assertIsNone(ret)
def test2(self):
"""
Stored routine with designation type singleton0 must return 1 value.
"""
ret = DataLayer.tst_test_singleton0a(1)
self.assertIsInstance(ret, (str, int, float))