def test_restriction(self):
"""Tests the options.restriction function"""
con = DbTestCase.connection
user = con.table("user")
self.assertEqual(u"a.id is null", options.restriction("a", user.column("id"), "=", None))
self.assertEqual(u"id is null", options.restriction(None, user.column("id"), "=", None))
self.assertEqual(u"a.id = 7", options.restriction("a", user.column("id"), "=", 7))
self.assertEqual(u"a.id = 'a'", options.restriction("a", user.column("id"), "=", "a"))
self.assertEqual(u"id = 'a'", options.restriction(None, user.column("id"), "=", "a"))
self.assertRaises(Exception, options.restriction, None, None, None, None)
def restriction(self, *args):
return restriction(*args)