django/tests/template_tests/test_smartif.py

Ignoring revisions in .git-blame-ignore-revs. Click here to bypass and see the normal blame view.

57 lines
2.1 KiB
Python
Raw Normal View History

import unittest
from django.template.smartif import IfParser
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):
2013-10-27 03:15:03 +08:00
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):
2013-10-27 03:15:03 +08:00
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()),
)