python27/guestbook/jinja2/testsuite/lexnparse.py

   1 # -*- coding: utf-8 -*-
   2 """
   3     jinja2.testsuite.lexnparse
   4     ~~~~~~~~~~~~~~~~~~~~~~~~~~
   5
   6     All the unittests regarding lexing, parsing and syntax.
   7
   8     :copyright: (c) 2010 by the Jinja Team.
   9     :license: BSD, see LICENSE for more details.
  10 """
  11 import sys
  12 import unittest
  13
  14 from jinja2.testsuite import JinjaTestCase
  15
  16 from jinja2 import Environment, Template, TemplateSyntaxError, \
  17      UndefinedError, nodes
  18
  19 env = Environment()
  20
  21
  22 # how does a string look like in jinja syntax?
  23 if sys.version_info < (3, 0):
  24     def jinja_string_repr(string):
  25         return repr(string)[1:]
  26 else:
  27     jinja_string_repr = repr
  28
  29
  30 class LexerTestCase(JinjaTestCase):
  31
  32     def test_raw1(self):
  33         tmpl = env.from_string('{% raw %}foo{% endraw %}|'
  34                                '{%raw%}{{ bar }}|{% baz %}{%       endraw    %}')
  35         assert tmpl.render() == 'foo|{{ bar }}|{% baz %}'
  36
  37     def test_raw2(self):
  38         tmpl = env.from_string('1  {%- raw -%}   2   {%- endraw -%}   3')
  39         assert tmpl.render() == '123'
  40
  41     def test_balancing(self):
  42         env = Environment('{%', '%}', '${', '}')
  43         tmpl = env.from_string('''{% for item in seq
  44             %}${{'foo': item}|upper}{% endfor %}''')
  45         assert tmpl.render(seq=range(3)) == "{'FOO': 0}{'FOO': 1}{'FOO': 2}"
  46
  47     def test_comments(self):
  48         env = Environment('<!--', '-->', '{', '}')
  49         tmpl = env.from_string('''\
  50 <ul>
  51 <!--- for item in seq -->
  52   <li>{item}</li>
  53 <!--- endfor -->
  54 </ul>''')
  55         assert tmpl.render(seq=range(3)) == ("<ul>\n  <li>0</li>\n  "
  56                                              "<li>1</li>\n  <li>2</li>\n</ul>")
  57
  58     def test_string_escapes(self):
  59         for char in u'\0', u'\u2668', u'\xe4', u'\t', u'\r', u'\n':
  60             tmpl = env.from_string('{{ %s }}' % jinja_string_repr(char))
  61             assert tmpl.render() == char
  62         assert env.from_string('{{ "\N{HOT SPRINGS}" }}').render() == u'\u2668'
  63
  64     def test_bytefallback(self):
  65         from pprint import pformat
  66         tmpl = env.from_string(u'''{{ 'foo'|pprint }}|{{ 'bär'|pprint }}''')
  67         assert tmpl.render() == pformat('foo') + '|' + pformat(u'bär')
  68
  69     def test_operators(self):
  70         from jinja2.lexer import operators
  71         for test, expect in operators.iteritems():
  72             if test in '([{}])':
  73                 continue
  74             stream = env.lexer.tokenize('{{ %s }}' % test)
  75             stream.next()
  76             assert stream.current.type == expect
  77
  78     def test_normalizing(self):
  79         for seq in '\r', '\r\n', '\n':
  80             env = Environment(newline_sequence=seq)
  81             tmpl = env.from_string('1\n2\r\n3\n4\n')
  82             result = tmpl.render()
  83             assert result.replace(seq, 'X') == '1X2X3X4'
  84
  85
  86 class ParserTestCase(JinjaTestCase):
  87
  88     def test_php_syntax(self):
  89         env = Environment('<?', '?>', '<?=', '?>', '<!--', '-->')
  90         tmpl = env.from_string('''\
  91 <!-- I'm a comment, I'm not interesting -->\
  92 <? for item in seq -?>
  93     <?= item ?>
  94 <?- endfor ?>''')
  95         assert tmpl.render(seq=range(5)) == '01234'
  96
  97     def test_erb_syntax(self):
  98         env = Environment('<%', '%>', '<%=', '%>', '<%#', '%>')
  99         tmpl = env.from_string('''\
 100 <%# I'm a comment, I'm not interesting %>\
 101 <% for item in seq -%>
 102     <%= item %>
 103 <%- endfor %>''')
 104         assert tmpl.render(seq=range(5)) == '01234'
 105
 106     def test_comment_syntax(self):
 107         env = Environment('<!--', '-->', '${', '}', '<!--#', '-->')
 108         tmpl = env.from_string('''\
 109 <!--# I'm a comment, I'm not interesting -->\
 110 <!-- for item in seq --->
 111     ${item}
 112 <!--- endfor -->''')
 113         assert tmpl.render(seq=range(5)) == '01234'
 114
 115     def test_balancing(self):
 116         tmpl = env.from_string('''{{{'foo':'bar'}.foo}}''')
 117         assert tmpl.render() == 'bar'
 118
 119     def test_start_comment(self):
 120         tmpl = env.from_string('''{# foo comment
 121 and bar comment #}
 122 {% macro blub() %}foo{% endmacro %}
 123 {{ blub() }}''')
 124         assert tmpl.render().strip() == 'foo'
 125
 126     def test_line_syntax(self):
 127         env = Environment('<%', '%>', '${', '}', '<%#', '%>', '%')
 128         tmpl = env.from_string('''\
 129 <%# regular comment %>
 130 % for item in seq:
 131     ${item}
 132 % endfor''')
 133         assert [int(x.strip()) for x in tmpl.render(seq=range(5)).split()] == \
 134                range(5)
 135
 136         env = Environment('<%', '%>', '${', '}', '<%#', '%>', '%', '##')
 137         tmpl = env.from_string('''\
 138 <%# regular comment %>
 139 % for item in seq:
 140     ${item} ## the rest of the stuff
 141 % endfor''')
 142         assert [int(x.strip()) for x in tmpl.render(seq=range(5)).split()] == \
 143                 range(5)
 144
 145     def test_line_syntax_priority(self):
 146         # XXX: why is the whitespace there in front of the newline?
 147         env = Environment('{%', '%}', '${', '}', '/*', '*/', '##', '#')
 148         tmpl = env.from_string('''\
 149 /* ignore me.
 150    I'm a multiline comment */
 151 ## for item in seq:
 152 * ${item}          # this is just extra stuff
 153 ## endfor''')
 154         assert tmpl.render(seq=[1, 2]).strip() == '* 1\n* 2'
 155         env = Environment('{%', '%}', '${', '}', '/*', '*/', '#', '##')
 156         tmpl = env.from_string('''\
 157 /* ignore me.
 158    I'm a multiline comment */
 159 # for item in seq:
 160 * ${item}          ## this is just extra stuff
 161     ## extra stuff i just want to ignore
 162 # endfor''')
 163         assert tmpl.render(seq=[1, 2]).strip() == '* 1\n\n* 2'
 164
 165     def test_error_messages(self):
 166         def assert_error(code, expected):
 167             try:
 168                 Template(code)
 169             except TemplateSyntaxError, e:
 170                 assert str(e) == expected, 'unexpected error message'
 171             else:
 172                 assert False, 'that was suposed to be an error'
 173
 174         assert_error('{% for item in seq %}...{% endif %}',
 175                      "Encountered unknown tag 'endif'. Jinja was looking "
 176                      "for the following tags: 'endfor' or 'else'. The "
 177                      "innermost block that needs to be closed is 'for'.")
 178         assert_error('{% if foo %}{% for item in seq %}...{% endfor %}{% endfor %}',
 179                      "Encountered unknown tag 'endfor'. Jinja was looking for "
 180                      "the following tags: 'elif' or 'else' or 'endif'. The "
 181                      "innermost block that needs to be closed is 'if'.")
 182         assert_error('{% if foo %}',
 183                      "Unexpected end of template. Jinja was looking for the "
 184                      "following tags: 'elif' or 'else' or 'endif'. The "
 185                      "innermost block that needs to be closed is 'if'.")
 186         assert_error('{% for item in seq %}',
 187                      "Unexpected end of template. Jinja was looking for the "
 188                      "following tags: 'endfor' or 'else'. The innermost block "
 189                      "that needs to be closed is 'for'.")
 190         assert_error('{% block foo-bar-baz %}',
 191                      "Block names in Jinja have to be valid Python identifiers "
 192                      "and may not contain hypens, use an underscore instead.")
 193         assert_error('{% unknown_tag %}',
 194                      "Encountered unknown tag 'unknown_tag'.")
 195
 196
 197 class SyntaxTestCase(JinjaTestCase):
 198
 199     def test_call(self):
 200         env = Environment()
 201         env.globals['foo'] = lambda a, b, c, e, g: a + b + c + e + g
 202         tmpl = env.from_string("{{ foo('a', c='d', e='f', *['b'], **{'g': 'h'}) }}")
 203         assert tmpl.render() == 'abdfh'
 204
 205     def test_slicing(self):
 206         tmpl = env.from_string('{{ [1, 2, 3][:] }}|{{ [1, 2, 3][::-1] }}')
 207         assert tmpl.render() == '[1, 2, 3]|[3, 2, 1]'
 208
 209     def test_attr(self):
 210         tmpl = env.from_string("{{ foo.bar }}|{{ foo['bar'] }}")
 211         assert tmpl.render(foo={'bar': 42}) == '42|42'
 212
 213     def test_subscript(self):
 214         tmpl = env.from_string("{{ foo[0] }}|{{ foo[-1] }}")
 215         assert tmpl.render(foo=[0, 1, 2]) == '0|2'
 216
 217     def test_tuple(self):
 218         tmpl = env.from_string('{{ () }}|{{ (1,) }}|{{ (1, 2) }}')
 219         assert tmpl.render() == '()|(1,)|(1, 2)'
 220
 221     def test_math(self):
 222         tmpl = env.from_string('{{ (1 + 1 * 2) - 3 / 2 }}|{{ 2**3 }}')
 223         assert tmpl.render() == '1.5|8'
 224
 225     def test_div(self):
 226         tmpl = env.from_string('{{ 3 // 2 }}|{{ 3 / 2 }}|{{ 3 % 2 }}')
 227         assert tmpl.render() == '1|1.5|1'
 228
 229     def test_unary(self):
 230         tmpl = env.from_string('{{ +3 }}|{{ -3 }}')
 231         assert tmpl.render() == '3|-3'
 232
 233     def test_concat(self):
 234         tmpl = env.from_string("{{ [1, 2] ~ 'foo' }}")
 235         assert tmpl.render() == '[1, 2]foo'
 236
 237     def test_compare(self):
 238         tmpl = env.from_string('{{ 1 > 0 }}|{{ 1 >= 1 }}|{{ 2 < 3 }}|'
 239                                '{{ 2 == 2 }}|{{ 1 <= 1 }}')
 240         assert tmpl.render() == 'True|True|True|True|True'
 241
 242     def test_inop(self):
 243         tmpl = env.from_string('{{ 1 in [1, 2, 3] }}|{{ 1 not in [1, 2, 3] }}')
 244         assert tmpl.render() == 'True|False'
 245
 246     def test_literals(self):
 247         tmpl = env.from_string('{{ [] }}|{{ {} }}|{{ () }}')
 248         assert tmpl.render().lower() == '[]|{}|()'
 249
 250     def test_bool(self):
 251         tmpl = env.from_string('{{ true and false }}|{{ false '
 252                                'or true }}|{{ not false }}')
 253         assert tmpl.render() == 'False|True|True'
 254
 255     def test_grouping(self):
 256         tmpl = env.from_string('{{ (true and false) or (false and true) and not false }}')
 257         assert tmpl.render() == 'False'
 258
 259     def test_django_attr(self):
 260         tmpl = env.from_string('{{ [1, 2, 3].0 }}|{{ [[1]].0.0 }}')
 261         assert tmpl.render() == '1|1'
 262
 263     def test_conditional_expression(self):
 264         tmpl = env.from_string('''{{ 0 if true else 1 }}''')
 265         assert tmpl.render() == '0'
 266
 267     def test_short_conditional_expression(self):
 268         tmpl = env.from_string('<{{ 1 if false }}>')
 269         assert tmpl.render() == '<>'
 270
 271         tmpl = env.from_string('<{{ (1 if false).bar }}>')
 272         self.assert_raises(UndefinedError, tmpl.render)
 273
 274     def test_filter_priority(self):
 275         tmpl = env.from_string('{{ "foo"|upper + "bar"|upper }}')
 276         assert tmpl.render() == 'FOOBAR'
 277
 278     def test_function_calls(self):
 279         tests = [
 280             (True, '*foo, bar'),
 281             (True, '*foo, *bar'),
 282             (True, '*foo, bar=42'),
 283             (True, '**foo, *bar'),
 284             (True, '**foo, bar'),
 285             (False, 'foo, bar'),
 286             (False, 'foo, bar=42'),
 287             (False, 'foo, bar=23, *args'),
 288             (False, 'a, b=c, *d, **e'),
 289             (False, '*foo, **bar')
 290         ]
 291         for should_fail, sig in tests:
 292             if should_fail:
 293                 self.assert_raises(TemplateSyntaxError,
 294                     env.from_string, '{{ foo(%s) }}' % sig)
 295             else:
 296                 env.from_string('foo(%s)' % sig)
 297
 298     def test_tuple_expr(self):
 299         for tmpl in [
 300             '{{ () }}',
 301             '{{ (1, 2) }}',
 302             '{{ (1, 2,) }}',
 303             '{{ 1, }}',
 304             '{{ 1, 2 }}',
 305             '{% for foo, bar in seq %}...{% endfor %}',
 306             '{% for x in foo, bar %}...{% endfor %}',
 307             '{% for x in foo, %}...{% endfor %}'
 308         ]:
 309             assert env.from_string(tmpl)
 310
 311     def test_trailing_comma(self):
 312         tmpl = env.from_string('{{ (1, 2,) }}|{{ [1, 2,] }}|{{ {1: 2,} }}')
 313         assert tmpl.render().lower() == '(1, 2)|[1, 2]|{1: 2}'
 314
 315     def test_block_end_name(self):
 316         env.from_string('{% block foo %}...{% endblock foo %}')
 317         self.assert_raises(TemplateSyntaxError, env.from_string,
 318                            '{% block x %}{% endblock y %}')
 319
 320     def test_contant_casing(self):
 321         for const in True, False, None:
 322             tmpl = env.from_string('{{ %s }}|{{ %s }}|{{ %s }}' % (
 323                 str(const), str(const).lower(), str(const).upper()
 324             ))
 325             assert tmpl.render() == '%s|%s|' % (const, const)
 326
 327     def test_test_chaining(self):
 328         self.assert_raises(TemplateSyntaxError, env.from_string,
 329                            '{{ foo is string is sequence }}')
 330         env.from_string('{{ 42 is string or 42 is number }}'
 331             ).render() == 'True'
 332
 333     def test_string_concatenation(self):
 334         tmpl = env.from_string('{{ "foo" "bar" "baz" }}')
 335         assert tmpl.render() == 'foobarbaz'
 336
 337     def test_notin(self):
 338         bar = xrange(100)
 339         tmpl = env.from_string('''{{ not 42 in bar }}''')
 340         assert tmpl.render(bar=bar) == unicode(not 42 in bar)
 341
 342     def test_implicit_subscribed_tuple(self):
 343         class Foo(object):
 344             def __getitem__(self, x):
 345                 return x
 346         t = env.from_string('{{ foo[1, 2] }}')
 347         assert t.render(foo=Foo()) == u'(1, 2)'
 348
 349     def test_raw2(self):
 350         tmpl = env.from_string('{% raw %}{{ FOO }} and {% BAR %}{% endraw %}')
 351         assert tmpl.render() == '{{ FOO }} and {% BAR %}'
 352
 353     def test_const(self):
 354         tmpl = env.from_string('{{ true }}|{{ false }}|{{ none }}|'
 355                                '{{ none is defined }}|{{ missing is defined }}')
 356         assert tmpl.render() == 'True|False|None|True|False'
 357
 358     def test_neg_filter_priority(self):
 359         node = env.parse('{{ -1|foo }}')
 360         assert isinstance(node.body[0].nodes[0], nodes.Filter)
 361         assert isinstance(node.body[0].nodes[0].node, nodes.Neg)
 362
 363     def test_const_assign(self):
 364         constass1 = '''{% set true = 42 %}'''
 365         constass2 = '''{% for none in seq %}{% endfor %}'''
 366         for tmpl in constass1, constass2:
 367             self.assert_raises(TemplateSyntaxError, env.from_string, tmpl)
 368
 369     def test_localset(self):
 370         tmpl = env.from_string('''{% set foo = 0 %}\
 371 {% for item in [1, 2] %}{% set foo = 1 %}{% endfor %}\
 372 {{ foo }}''')
 373         assert tmpl.render() == '0'
 374
 375     def test_parse_unary(self):
 376         tmpl = env.from_string('{{ -foo["bar"] }}')
 377         assert tmpl.render(foo={'bar': 42}) == '-42'
 378         tmpl = env.from_string('{{ -foo["bar"]|abs }}')
 379         assert tmpl.render(foo={'bar': 42}) == '42'
 380
 381
 382 def suite():
 383     suite = unittest.TestSuite()
 384     suite.addTest(unittest.makeSuite(LexerTestCase))
 385     suite.addTest(unittest.makeSuite(ParserTestCase))
 386     suite.addTest(unittest.makeSuite(SyntaxTestCase))
 387     return suite