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