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136 lines
5.0 KiB
Python
136 lines
5.0 KiB
Python
"""
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Testing some internals of the template processing. These are *not* examples to be copied in user code.
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"""
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from django.template import Library, TemplateSyntaxError
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from django.template.base import (
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FilterExpression, Lexer, Parser, Token, TokenType, Variable,
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)
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from django.template.defaultfilters import register as filter_library
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from django.test import SimpleTestCase
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class ParserTests(SimpleTestCase):
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def test_token_smart_split(self):
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"""
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#7027 -- _() syntax should work with spaces
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"""
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token = Token(TokenType.BLOCK, 'sometag _("Page not found") value|yesno:_("yes,no")')
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split = token.split_contents()
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self.assertEqual(split, ["sometag", '_("Page not found")', 'value|yesno:_("yes,no")'])
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def test_repr(self):
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token = Token(TokenType.BLOCK, 'some text')
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self.assertEqual(repr(token), '<Block token: "some text...">')
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parser = Parser([token], builtins=[filter_library])
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self.assertEqual(
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repr(parser),
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'<Parser tokens=[<Block token: "some text...">]>',
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)
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filter_expression = FilterExpression('news|upper', parser)
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self.assertEqual(repr(filter_expression), "<FilterExpression 'news|upper'>")
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lexer = Lexer('{% for i in 1 %}{{ a }}\n{% endfor %}')
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self.assertEqual(
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repr(lexer),
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'<Lexer template_string="{% for i in 1 %}{{ a...", verbatim=False>',
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)
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def test_filter_parsing(self):
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c = {"article": {"section": "News"}}
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p = Parser("", builtins=[filter_library])
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def fe_test(s, val):
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self.assertEqual(FilterExpression(s, p).resolve(c), val)
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fe_test("article.section", "News")
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fe_test("article.section|upper", "NEWS")
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fe_test('"News"', "News")
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fe_test("'News'", "News")
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fe_test(r'"Some \"Good\" News"', 'Some "Good" News')
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fe_test(r'"Some \"Good\" News"', 'Some "Good" News')
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fe_test(r"'Some \'Bad\' News'", "Some 'Bad' News")
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fe = FilterExpression(r'"Some \"Good\" News"', p)
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self.assertEqual(fe.filters, [])
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self.assertEqual(fe.var, 'Some "Good" News')
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# Filtered variables should reject access of attributes beginning with
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# underscores.
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msg = "Variables and attributes may not begin with underscores: 'article._hidden'"
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with self.assertRaisesMessage(TemplateSyntaxError, msg):
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FilterExpression("article._hidden|upper", p)
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def test_variable_parsing(self):
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c = {"article": {"section": "News"}}
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self.assertEqual(Variable("article.section").resolve(c), "News")
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self.assertEqual(Variable('"News"').resolve(c), "News")
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self.assertEqual(Variable("'News'").resolve(c), "News")
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# Translated strings are handled correctly.
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self.assertEqual(Variable("_(article.section)").resolve(c), "News")
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self.assertEqual(Variable('_("Good News")').resolve(c), "Good News")
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self.assertEqual(Variable("_('Better News')").resolve(c), "Better News")
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# Escaped quotes work correctly as well.
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self.assertEqual(
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Variable(r'"Some \"Good\" News"').resolve(c), 'Some "Good" News'
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)
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self.assertEqual(
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Variable(r"'Some \'Better\' News'").resolve(c), "Some 'Better' News"
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)
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# Variables should reject access of attributes and variables beginning
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# with underscores.
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for name in ['article._hidden', '_article']:
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msg = f"Variables and attributes may not begin with underscores: '{name}'"
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with self.assertRaisesMessage(TemplateSyntaxError, msg):
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Variable(name)
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# Variables should raise on non string type
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with self.assertRaisesMessage(TypeError, "Variable must be a string or number, got <class 'dict'>"):
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Variable({})
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def test_filter_args_count(self):
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parser = Parser("")
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register = Library()
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@register.filter
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def no_arguments(value):
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pass
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@register.filter
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def one_argument(value, arg):
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pass
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@register.filter
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def one_opt_argument(value, arg=False):
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pass
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@register.filter
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def two_arguments(value, arg, arg2):
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pass
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@register.filter
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def two_one_opt_arg(value, arg, arg2=False):
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pass
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parser.add_library(register)
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for expr in (
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'1|no_arguments:"1"',
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'1|two_arguments',
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'1|two_arguments:"1"',
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'1|two_one_opt_arg',
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):
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with self.assertRaises(TemplateSyntaxError):
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FilterExpression(expr, parser)
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for expr in (
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# Correct number of arguments
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'1|no_arguments',
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'1|one_argument:"1"',
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# One optional
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'1|one_opt_argument',
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'1|one_opt_argument:"1"',
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# Not supplying all
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'1|two_one_opt_arg:"1"',
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):
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FilterExpression(expr, parser)
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