n0v4pl4n3t / jinja2 / testsuite / ext.py

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# -*- coding: utf-8 -*-
"""
    jinja2.testsuite.ext
    ~~~~~~~~~~~~~~~~~~~~

    Tests for the extensions.

    :copyright: (c) 2010 by the Jinja Team.
    :license: BSD, see LICENSE for more details.
"""
import re
import unittest

from jinja2.testsuite import JinjaTestCase

from jinja2 import Environment, DictLoader, contextfunction, nodes
from jinja2.exceptions import TemplateAssertionError
from jinja2.ext import Extension
from jinja2.lexer import Token, count_newlines
from jinja2.utils import next

# 2.x / 3.x
try:
    from io import BytesIO
except ImportError:
    from StringIO import StringIO as BytesIO


importable_object = 23

_gettext_re = re.compile(r'_\((.*?)\)(?s)')


i18n_templates = {
    'master.html': '<title>{{ page_title|default(_("missing")) }}</title>'
                   '{% block body %}{% endblock %}',
    'child.html': '{% extends "master.html" %}{% block body %}'
                  '{% trans %}watch out{% endtrans %}{% endblock %}',
    'plural.html': '{% trans user_count %}One user online{% pluralize %}'
                   '{{ user_count }} users online{% endtrans %}',
    'stringformat.html': '{{ _("User: %(num)s")|format(num=user_count) }}'
}

newstyle_i18n_templates = {
    'master.html': '<title>{{ page_title|default(_("missing")) }}</title>'
                   '{% block body %}{% endblock %}',
    'child.html': '{% extends "master.html" %}{% block body %}'
                  '{% trans %}watch out{% endtrans %}{% endblock %}',
    'plural.html': '{% trans user_count %}One user online{% pluralize %}'
                   '{{ user_count }} users online{% endtrans %}',
    'stringformat.html': '{{ _("User: %(num)s", num=user_count) }}',
    'ngettext.html': '{{ ngettext("%(num)s apple", "%(num)s apples", apples) }}',
    'ngettext_long.html': '{% trans num=apples %}{{ num }} apple{% pluralize %}'
                          '{{ num }} apples{% endtrans %}',
    'transvars1.html': '{% trans %}User: {{ num }}{% endtrans %}',
    'transvars2.html': '{% trans num=count %}User: {{ num }}{% endtrans %}',
    'transvars3.html': '{% trans count=num %}User: {{ count }}{% endtrans %}',
    'novars.html': '{% trans %}%(hello)s{% endtrans %}',
    'vars.html': '{% trans %}{{ foo }}%(foo)s{% endtrans %}',
    'explicitvars.html': '{% trans foo="42" %}%(foo)s{% endtrans %}'
}


languages = {
    'de': {
        'missing':                      u'fehlend',
        'watch out':                    u'pass auf',
        'One user online':              u'Ein Benutzer online',
        '%(user_count)s users online':  u'%(user_count)s Benutzer online',
        'User: %(num)s':                u'Benutzer: %(num)s',
        'User: %(count)s':              u'Benutzer: %(count)s',
        '%(num)s apple':                u'%(num)s Apfel',
        '%(num)s apples':               u'%(num)s Äpfel'
    }
}


@contextfunction
def gettext(context, string):
    language = context.get('LANGUAGE', 'en')
    return languages.get(language, {}).get(string, string)


@contextfunction
def ngettext(context, s, p, n):
    language = context.get('LANGUAGE', 'en')
    if n != 1:
        return languages.get(language, {}).get(p, p)
    return languages.get(language, {}).get(s, s)


i18n_env = Environment(
    loader=DictLoader(i18n_templates),
    extensions=['jinja2.ext.i18n']
)
i18n_env.globals.update({
    '_':            gettext,
    'gettext':      gettext,
    'ngettext':     ngettext
})

newstyle_i18n_env = Environment(
    loader=DictLoader(newstyle_i18n_templates),
    extensions=['jinja2.ext.i18n']
)
newstyle_i18n_env.install_gettext_callables(gettext, ngettext, newstyle=True)

class TestExtension(Extension):
    tags = set(['test'])
    ext_attr = 42

    def parse(self, parser):
        return nodes.Output([self.call_method('_dump', [
            nodes.EnvironmentAttribute('sandboxed'),
            self.attr('ext_attr'),
            nodes.ImportedName(__name__ + '.importable_object'),
            nodes.ContextReference()
        ])]).set_lineno(next(parser.stream).lineno)

    def _dump(self, sandboxed, ext_attr, imported_object, context):
        return '%s|%s|%s|%s' % (
            sandboxed,
            ext_attr,
            imported_object,
            context.blocks
        )


class PreprocessorExtension(Extension):

    def preprocess(self, source, name, filename=None):
        return source.replace('[[TEST]]', '({{ foo }})')


class StreamFilterExtension(Extension):

    def filter_stream(self, stream):
        for token in stream:
            if token.type == 'data':
                for t in self.interpolate(token):
                    yield t
            else:
                yield token

    def interpolate(self, token):
        pos = 0
        end = len(token.value)
        lineno = token.lineno
        while 1:
            match = _gettext_re.search(token.value, pos)
            if match is None:
                break
            value = token.value[pos:match.start()]
            if value:
                yield Token(lineno, 'data', value)
            lineno += count_newlines(token.value)
            yield Token(lineno, 'variable_begin', None)
            yield Token(lineno, 'name', 'gettext')
            yield Token(lineno, 'lparen', None)
            yield Token(lineno, 'string', match.group(1))
            yield Token(lineno, 'rparen', None)
            yield Token(lineno, 'variable_end', None)
            pos = match.end()
        if pos < end:
            yield Token(lineno, 'data', token.value[pos:])


class ExtensionsTestCase(JinjaTestCase):

    def test_extend_late(self):
        env = Environment()
        env.add_extension('jinja2.ext.autoescape')
        t = env.from_string('{% autoescape true %}{{ "<test>" }}{% endautoescape %}')
        assert t.render() == '&lt;test&gt;'

    def test_loop_controls(self):
        env = Environment(extensions=['jinja2.ext.loopcontrols'])

        tmpl = env.from_string('''
            {%- for item in [1, 2, 3, 4] %}
                {%- if item % 2 == 0 %}{% continue %}{% endif -%}
                {{ item }}
            {%- endfor %}''')
        assert tmpl.render() == '13'

        tmpl = env.from_string('''
            {%- for item in [1, 2, 3, 4] %}
                {%- if item > 2 %}{% break %}{% endif -%}
                {{ item }}
            {%- endfor %}''')
        assert tmpl.render() == '12'

    def test_do(self):
        env = Environment(extensions=['jinja2.ext.do'])
        tmpl = env.from_string('''
            {%- set items = [] %}
            {%- for char in "foo" %}
                {%- do items.append(loop.index0 ~ char) %}
            {%- endfor %}{{ items|join(', ') }}''')
        assert tmpl.render() == '0f, 1o, 2o'

    def test_with(self):
        env = Environment(extensions=['jinja2.ext.with_'])
        tmpl = env.from_string('''\
        {% with a=42, b=23 -%}
            {{ a }} = {{ b }}
        {% endwith -%}
            {{ a }} = {{ b }}\
        ''')
        assert [x.strip() for x in tmpl.render(a=1, b=2).splitlines()] \
            == ['42 = 23', '1 = 2']

    def test_extension_nodes(self):
        env = Environment(extensions=[TestExtension])
        tmpl = env.from_string('{% test %}')
        assert tmpl.render() == 'False|42|23|{}'

    def test_identifier(self):
        assert TestExtension.identifier == __name__ + '.TestExtension'

    def test_rebinding(self):
        original = Environment(extensions=[TestExtension])
        overlay = original.overlay()
        for env in original, overlay:
            for ext in env.extensions.itervalues():
                assert ext.environment is env

    def test_preprocessor_extension(self):
        env = Environment(extensions=[PreprocessorExtension])
        tmpl = env.from_string('{[[TEST]]}')
        assert tmpl.render(foo=42) == '{(42)}'

    def test_streamfilter_extension(self):
        env = Environment(extensions=[StreamFilterExtension])
        env.globals['gettext'] = lambda x: x.upper()
        tmpl = env.from_string('Foo _(bar) Baz')
        out = tmpl.render()
        assert out == 'Foo BAR Baz'

    def test_extension_ordering(self):
        class T1(Extension):
            priority = 1
        class T2(Extension):
            priority = 2
        env = Environment(extensions=[T1, T2])
        ext = list(env.iter_extensions())
        assert ext[0].__class__ is T1
        assert ext[1].__class__ is T2


class InternationalizationTestCase(JinjaTestCase):

    def test_trans(self):
        tmpl = i18n_env.get_template('child.html')
        assert tmpl.render(LANGUAGE='de') == '<title>fehlend</title>pass auf'

    def test_trans_plural(self):
        tmpl = i18n_env.get_template('plural.html')
        assert tmpl.render(LANGUAGE='de', user_count=1) == 'Ein Benutzer online'
        assert tmpl.render(LANGUAGE='de', user_count=2) == '2 Benutzer online'

    def test_complex_plural(self):
        tmpl = i18n_env.from_string('{% trans foo=42, count=2 %}{{ count }} item{% '
                                    'pluralize count %}{{ count }} items{% endtrans %}')
        assert tmpl.render() == '2 items'
        self.assert_raises(TemplateAssertionError, i18n_env.from_string,
                           '{% trans foo %}...{% pluralize bar %}...{% endtrans %}')

    def test_trans_stringformatting(self):
        tmpl = i18n_env.get_template('stringformat.html')
        assert tmpl.render(LANGUAGE='de', user_count=5) == 'Benutzer: 5'

    def test_extract(self):
        from jinja2.ext import babel_extract
        source = BytesIO('''
        {{ gettext('Hello World') }}
        {% trans %}Hello World{% endtrans %}
        {% trans %}{{ users }} user{% pluralize %}{{ users }} users{% endtrans %}
        '''.encode('ascii')) # make python 3 happy
        assert list(babel_extract(source, ('gettext', 'ngettext', '_'), [], {})) == [
            (2, 'gettext', u'Hello World', []),
            (3, 'gettext', u'Hello World', []),
            (4, 'ngettext', (u'%(users)s user', u'%(users)s users', None), [])
        ]

    def test_comment_extract(self):
        from jinja2.ext import babel_extract
        source = BytesIO('''
        {# trans first #}
        {{ gettext('Hello World') }}
        {% trans %}Hello World{% endtrans %}{# trans second #}
        {#: third #}
        {% trans %}{{ users }} user{% pluralize %}{{ users }} users{% endtrans %}
        '''.encode('utf-8')) # make python 3 happy
        assert list(babel_extract(source, ('gettext', 'ngettext', '_'), ['trans', ':'], {})) == [
            (3, 'gettext', u'Hello World', ['first']),
            (4, 'gettext', u'Hello World', ['second']),
            (6, 'ngettext', (u'%(users)s user', u'%(users)s users', None), ['third'])
        ]


class NewstyleInternationalizationTestCase(JinjaTestCase):

    def test_trans(self):
        tmpl = newstyle_i18n_env.get_template('child.html')
        assert tmpl.render(LANGUAGE='de') == '<title>fehlend</title>pass auf'

    def test_trans_plural(self):
        tmpl = newstyle_i18n_env.get_template('plural.html')
        assert tmpl.render(LANGUAGE='de', user_count=1) == 'Ein Benutzer online'
        assert tmpl.render(LANGUAGE='de', user_count=2) == '2 Benutzer online'

    def test_complex_plural(self):
        tmpl = newstyle_i18n_env.from_string('{% trans foo=42, count=2 %}{{ count }} item{% '
                                    'pluralize count %}{{ count }} items{% endtrans %}')
        assert tmpl.render() == '2 items'
        self.assert_raises(TemplateAssertionError, i18n_env.from_string,
                           '{% trans foo %}...{% pluralize bar %}...{% endtrans %}')

    def test_trans_stringformatting(self):
        tmpl = newstyle_i18n_env.get_template('stringformat.html')
        assert tmpl.render(LANGUAGE='de', user_count=5) == 'Benutzer: 5'

    def test_newstyle_plural(self):
        tmpl = newstyle_i18n_env.get_template('ngettext.html')
        assert tmpl.render(LANGUAGE='de', apples=1) == '1 Apfel'
        assert tmpl.render(LANGUAGE='de', apples=5) == u'5 Äpfel'

    def test_autoescape_support(self):
        env = Environment(extensions=['jinja2.ext.autoescape',
                                      'jinja2.ext.i18n'])
        env.install_gettext_callables(lambda x: u'<strong>Wert: %(name)s</strong>',
                                      lambda s, p, n: s, newstyle=True)
        t = env.from_string('{% autoescape ae %}{{ gettext("foo", name='
                            '"<test>") }}{% endautoescape %}')
        assert t.render(ae=True) == '<strong>Wert: &lt;test&gt;</strong>'
        assert t.render(ae=False) == '<strong>Wert: <test></strong>'

    def test_num_used_twice(self):
        tmpl = newstyle_i18n_env.get_template('ngettext_long.html')
        assert tmpl.render(apples=5, LANGUAGE='de') == u'5 Äpfel'

    def test_num_called_num(self):
        source = newstyle_i18n_env.compile('''
            {% trans num=3 %}{{ num }} apple{% pluralize
            %}{{ num }} apples{% endtrans %}
        ''', raw=True)
        # quite hacky, but the only way to properly test that.  The idea is
        # that the generated code does not pass num twice (although that
        # would work) for better performance.  This only works on the
        # newstyle gettext of course
        assert re.search(r"l_ngettext, u?'\%\(num\)s apple', u?'\%\(num\)s "
                         r"apples', 3", source) is not None

    def test_trans_vars(self):
        t1 = newstyle_i18n_env.get_template('transvars1.html')
        t2 = newstyle_i18n_env.get_template('transvars2.html')
        t3 = newstyle_i18n_env.get_template('transvars3.html')
        assert t1.render(num=1, LANGUAGE='de') == 'Benutzer: 1'
        assert t2.render(count=23, LANGUAGE='de') == 'Benutzer: 23'
        assert t3.render(num=42, LANGUAGE='de') == 'Benutzer: 42'

    def test_novars_vars_escaping(self):
        t = newstyle_i18n_env.get_template('novars.html')
        assert t.render() == '%(hello)s'
        t = newstyle_i18n_env.get_template('vars.html')
        assert t.render(foo='42') == '42%(foo)s'
        t = newstyle_i18n_env.get_template('explicitvars.html')
        assert t.render() == '%(foo)s'


class AutoEscapeTestCase(JinjaTestCase):

    def test_scoped_setting(self):
        env = Environment(extensions=['jinja2.ext.autoescape'],
                          autoescape=True)
        tmpl = env.from_string('''
            {{ "<HelloWorld>" }}
            {% autoescape false %}
                {{ "<HelloWorld>" }}
            {% endautoescape %}
            {{ "<HelloWorld>" }}
        ''')
        assert tmpl.render().split() == \
            [u'&lt;HelloWorld&gt;', u'<HelloWorld>', u'&lt;HelloWorld&gt;']

        env = Environment(extensions=['jinja2.ext.autoescape'],
                          autoescape=False)
        tmpl = env.from_string('''
            {{ "<HelloWorld>" }}
            {% autoescape true %}
                {{ "<HelloWorld>" }}
            {% endautoescape %}
            {{ "<HelloWorld>" }}
        ''')
        assert tmpl.render().split() == \
            [u'<HelloWorld>', u'&lt;HelloWorld&gt;', u'<HelloWorld>']

    def test_nonvolatile(self):
        env = Environment(extensions=['jinja2.ext.autoescape'],
                          autoescape=True)
        tmpl = env.from_string('{{ {"foo": "<test>"}|xmlattr|escape }}')
        assert tmpl.render() == ' foo="&lt;test&gt;"'
        tmpl = env.from_string('{% autoescape false %}{{ {"foo": "<test>"}'
                               '|xmlattr|escape }}{% endautoescape %}')
        assert tmpl.render() == ' foo=&#34;&amp;lt;test&amp;gt;&#34;'

    def test_volatile(self):
        env = Environment(extensions=['jinja2.ext.autoescape'],
                          autoescape=True)
        tmpl = env.from_string('{% autoescape foo %}{{ {"foo": "<test>"}'
                               '|xmlattr|escape }}{% endautoescape %}')
        assert tmpl.render(foo=False) == ' foo=&#34;&amp;lt;test&amp;gt;&#34;'
        assert tmpl.render(foo=True) == ' foo="&lt;test&gt;"'

    def test_scoping(self):
        env = Environment(extensions=['jinja2.ext.autoescape'])
        tmpl = env.from_string('{% autoescape true %}{% set x = "<x>" %}{{ x }}'
                               '{% endautoescape %}{{ x }}{{ "<y>" }}')
        assert tmpl.render(x=1) == '&lt;x&gt;1<y>'

    def test_volatile_scoping(self):
        env = Environment(extensions=['jinja2.ext.autoescape'])
        tmplsource = '''
        {% autoescape val %}
            {% macro foo(x) %}
                [{{ x }}]
            {% endmacro %}
            {{ foo().__class__.__name__ }}
        {% endautoescape %}
        {{ '<testing>' }}
        '''
        tmpl = env.from_string(tmplsource)
        assert tmpl.render(val=True).split()[0] == 'Markup'
        assert tmpl.render(val=False).split()[0] == unicode.__name__

        # looking at the source we should see <testing> there in raw
        # (and then escaped as well)
        env = Environment(extensions=['jinja2.ext.autoescape'])
        pysource = env.compile(tmplsource, raw=True)
        assert '<testing>\\n' in pysource

        env = Environment(extensions=['jinja2.ext.autoescape'],
                          autoescape=True)
        pysource = env.compile(tmplsource, raw=True)
        assert '&lt;testing&gt;\\n' in pysource


def suite():
    suite = unittest.TestSuite()
    suite.addTest(unittest.makeSuite(ExtensionsTestCase))
    suite.addTest(unittest.makeSuite(InternationalizationTestCase))
    suite.addTest(unittest.makeSuite(NewstyleInternationalizationTestCase))
    suite.addTest(unittest.makeSuite(AutoEscapeTestCase))
    return suite
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