| from django.template.smartif import IfParser |
| from django.utils import unittest |
| |
| class SmartIfTests(unittest.TestCase): |
| |
| def assertCalcEqual(self, expected, tokens): |
| self.assertEqual(expected, IfParser(tokens).parse().eval({})) |
| |
| # We only test things here that are difficult to test elsewhere |
| # Many other tests are found in the main tests for builtin template tags |
| # Test parsing via the printed parse tree |
| def test_not(self): |
| var = IfParser(["not", False]).parse() |
| self.assertEqual("(not (literal False))", repr(var)) |
| self.assertTrue(var.eval({})) |
| |
| self.assertFalse(IfParser(["not", True]).parse().eval({})) |
| |
| def test_or(self): |
| var = IfParser([True, "or", False]).parse() |
| self.assertEqual("(or (literal True) (literal False))", repr(var)) |
| self.assertTrue(var.eval({})) |
| |
| def test_in(self): |
| list_ = [1,2,3] |
| self.assertCalcEqual(True, [1, 'in', list_]) |
| self.assertCalcEqual(False, [1, 'in', None]) |
| self.assertCalcEqual(False, [None, 'in', list_]) |
| |
| def test_not_in(self): |
| list_ = [1,2,3] |
| self.assertCalcEqual(False, [1, 'not', 'in', list_]) |
| self.assertCalcEqual(True, [4, 'not', 'in', list_]) |
| self.assertCalcEqual(False, [1, 'not', 'in', None]) |
| self.assertCalcEqual(True, [None, 'not', 'in', list_]) |
| |
| def test_precedence(self): |
| # (False and False) or True == True <- we want this one, like Python |
| # False and (False or True) == False |
| self.assertCalcEqual(True, [False, 'and', False, 'or', True]) |
| |
| # True or (False and False) == True <- we want this one, like Python |
| # (True or False) and False == False |
| self.assertCalcEqual(True, [True, 'or', False, 'and', False]) |
| |
| # (1 or 1) == 2 -> False |
| # 1 or (1 == 2) -> True <- we want this one |
| self.assertCalcEqual(True, [1, 'or', 1, '==', 2]) |
| |
| self.assertCalcEqual(True, [True, '==', True, 'or', True, '==', False]) |
| |
| self.assertEqual("(or (and (== (literal 1) (literal 2)) (literal 3)) (literal 4))", |
| repr(IfParser([1, '==', 2, 'and', 3, 'or', 4]).parse())) |
