| """ |
| Testing some internals of the template processing. These are *not* examples to be copied in user code. |
| """ |
| from django.template import (TokenParser, FilterExpression, Parser, Variable, |
| TemplateSyntaxError) |
| from django.utils.unittest import TestCase |
| |
| |
| class ParserTests(TestCase): |
| def test_token_parsing(self): |
| # Tests for TokenParser behavior in the face of quoted strings with |
| # spaces. |
| |
| p = TokenParser("tag thevar|filter sometag") |
| self.assertEqual(p.tagname, "tag") |
| self.assertEqual(p.value(), "thevar|filter") |
| self.assertTrue(p.more()) |
| self.assertEqual(p.tag(), "sometag") |
| self.assertFalse(p.more()) |
| |
| p = TokenParser('tag "a value"|filter sometag') |
| self.assertEqual(p.tagname, "tag") |
| self.assertEqual(p.value(), '"a value"|filter') |
| self.assertTrue(p.more()) |
| self.assertEqual(p.tag(), "sometag") |
| self.assertFalse(p.more()) |
| |
| p = TokenParser("tag 'a value'|filter sometag") |
| self.assertEqual(p.tagname, "tag") |
| self.assertEqual(p.value(), "'a value'|filter") |
| self.assertTrue(p.more()) |
| self.assertEqual(p.tag(), "sometag") |
| self.assertFalse(p.more()) |
| |
| def test_filter_parsing(self): |
| c = {"article": {"section": u"News"}} |
| p = Parser("") |
| |
| def fe_test(s, val): |
| self.assertEqual(FilterExpression(s, p).resolve(c), val) |
| |
| fe_test("article.section", u"News") |
| fe_test("article.section|upper", u"NEWS") |
| fe_test(u'"News"', u"News") |
| fe_test(u"'News'", u"News") |
| fe_test(ur'"Some \"Good\" News"', u'Some "Good" News') |
| fe_test(ur'"Some \"Good\" News"', u'Some "Good" News') |
| fe_test(ur"'Some \'Bad\' News'", u"Some 'Bad' News") |
| |
| fe = FilterExpression(ur'"Some \"Good\" News"', p) |
| self.assertEqual(fe.filters, []) |
| self.assertEqual(fe.var, u'Some "Good" News') |
| |
| # Filtered variables should reject access of attributes beginning with |
| # underscores. |
| self.assertRaises(TemplateSyntaxError, |
| FilterExpression, "article._hidden|upper", p |
| ) |
| |
| def test_variable_parsing(self): |
| c = {"article": {"section": u"News"}} |
| self.assertEqual(Variable("article.section").resolve(c), "News") |
| self.assertEqual(Variable(u'"News"').resolve(c), "News") |
| self.assertEqual(Variable(u"'News'").resolve(c), "News") |
| |
| # Translated strings are handled correctly. |
| self.assertEqual(Variable("_(article.section)").resolve(c), "News") |
| self.assertEqual(Variable('_("Good News")').resolve(c), "Good News") |
| self.assertEqual(Variable("_('Better News')").resolve(c), "Better News") |
| |
| # Escaped quotes work correctly as well. |
| self.assertEqual( |
| Variable(ur'"Some \"Good\" News"').resolve(c), 'Some "Good" News' |
| ) |
| self.assertEqual( |
| Variable(ur"'Some \'Better\' News'").resolve(c), "Some 'Better' News" |
| ) |
| |
| # Variables should reject access of attributes beginning with |
| # underscores. |
| self.assertRaises(TemplateSyntaxError, |
| Variable, "article._hidden" |
| ) |
