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/tests/regressiontests/templates/parser.py

https://code.google.com/p/mango-py/
Python | 83 lines | 72 code | 6 blank | 5 comment | 0 complexity | 672d47061bf0a01c7d4838030227642b MD5 | raw file
Possible License(s): BSD-3-Clause
  1. """
  2. Testing some internals of the template processing. These are *not* examples to be copied in user code.
  3. """
  4. from django.template import (TokenParser, FilterExpression, Parser, Variable,
  5. TemplateSyntaxError)
  6. from django.utils.unittest import TestCase
  7. class ParserTests(TestCase):
  8. def test_token_parsing(self):
  9. # Tests for TokenParser behavior in the face of quoted strings with
  10. # spaces.
  11. p = TokenParser("tag thevar|filter sometag")
  12. self.assertEqual(p.tagname, "tag")
  13. self.assertEqual(p.value(), "thevar|filter")
  14. self.assertTrue(p.more())
  15. self.assertEqual(p.tag(), "sometag")
  16. self.assertFalse(p.more())
  17. p = TokenParser('tag "a value"|filter sometag')
  18. self.assertEqual(p.tagname, "tag")
  19. self.assertEqual(p.value(), '"a value"|filter')
  20. self.assertTrue(p.more())
  21. self.assertEqual(p.tag(), "sometag")
  22. self.assertFalse(p.more())
  23. p = TokenParser("tag 'a value'|filter sometag")
  24. self.assertEqual(p.tagname, "tag")
  25. self.assertEqual(p.value(), "'a value'|filter")
  26. self.assertTrue(p.more())
  27. self.assertEqual(p.tag(), "sometag")
  28. self.assertFalse(p.more())
  29. def test_filter_parsing(self):
  30. c = {"article": {"section": u"News"}}
  31. p = Parser("")
  32. def fe_test(s, val):
  33. self.assertEqual(FilterExpression(s, p).resolve(c), val)
  34. fe_test("article.section", u"News")
  35. fe_test("article.section|upper", u"NEWS")
  36. fe_test(u'"News"', u"News")
  37. fe_test(u"'News'", u"News")
  38. fe_test(ur'"Some \"Good\" News"', u'Some "Good" News')
  39. fe_test(ur'"Some \"Good\" News"', u'Some "Good" News')
  40. fe_test(ur"'Some \'Bad\' News'", u"Some 'Bad' News")
  41. fe = FilterExpression(ur'"Some \"Good\" News"', p)
  42. self.assertEqual(fe.filters, [])
  43. self.assertEqual(fe.var, u'Some "Good" News')
  44. # Filtered variables should reject access of attributes beginning with
  45. # underscores.
  46. self.assertRaises(TemplateSyntaxError,
  47. FilterExpression, "article._hidden|upper", p
  48. )
  49. def test_variable_parsing(self):
  50. c = {"article": {"section": u"News"}}
  51. self.assertEqual(Variable("article.section").resolve(c), "News")
  52. self.assertEqual(Variable(u'"News"').resolve(c), "News")
  53. self.assertEqual(Variable(u"'News'").resolve(c), "News")
  54. # Translated strings are handled correctly.
  55. self.assertEqual(Variable("_(article.section)").resolve(c), "News")
  56. self.assertEqual(Variable('_("Good News")').resolve(c), "Good News")
  57. self.assertEqual(Variable("_('Better News')").resolve(c), "Better News")
  58. # Escaped quotes work correctly as well.
  59. self.assertEqual(
  60. Variable(ur'"Some \"Good\" News"').resolve(c), 'Some "Good" News'
  61. )
  62. self.assertEqual(
  63. Variable(ur"'Some \'Better\' News'").resolve(c), "Some 'Better' News"
  64. )
  65. # Variables should reject access of attributes beginning with
  66. # underscores.
  67. self.assertRaises(TemplateSyntaxError,
  68. Variable, "article._hidden"
  69. )