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# -*- coding: utf-8 -*-
"""
jinja2.testsuite.inheritance
~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Tests the template inheritance feature.
:copyright: (c) 2010 by the Jinja Team.
:license: BSD, see LICENSE for more details.
"""
import unittest
from jinja2.testsuite import JinjaTestCase
from jinja2 import Environment, DictLoader, TemplateError
LAYOUTTEMPLATE = '''\
|{% block block1 %}block 1 from layout{% endblock %}
|{% block block2 %}block 2 from layout{% endblock %}
|{% block block3 %}
{% block block4 %}nested block 4 from layout{% endblock %}
{% endblock %}|'''
LEVEL1TEMPLATE = '''\
{% extends "layout" %}
{% block block1 %}block 1 from level1{% endblock %}'''
LEVEL2TEMPLATE = '''\
{% extends "level1" %}
{% block block2 %}{% block block5 %}nested block 5 from level2{%
endblock %}{% endblock %}'''
LEVEL3TEMPLATE = '''\
{% extends "level2" %}
{% block block5 %}block 5 from level3{% endblock %}
{% block block4 %}block 4 from level3{% endblock %}
'''
LEVEL4TEMPLATE = '''\
{% extends "level3" %}
{% block block3 %}block 3 from level4{% endblock %}
'''
WORKINGTEMPLATE = '''\
{% extends "layout" %}
{% block block1 %}
{% if false %}
{% block block2 %}
this should workd
{% endblock %}
{% endif %}
{% endblock %}
'''
DOUBLEEXTENDS = '''\
{% extends "layout" %}
{% extends "layout" %}
{% block block1 %}
{% if false %}
{% block block2 %}
this should workd
{% endblock %}
{% endif %}
{% endblock %}
'''
env = Environment(loader=DictLoader({
'layout': LAYOUTTEMPLATE,
'level1': LEVEL1TEMPLATE,
'level2': LEVEL2TEMPLATE,
'level3': LEVEL3TEMPLATE,
'level4': LEVEL4TEMPLATE,
'working': WORKINGTEMPLATE,
'doublee': DOUBLEEXTENDS,
}), trim_blocks=True)
class InheritanceTestCase(JinjaTestCase):
def test_layout(self):
tmpl = env.get_template('layout')
assert tmpl.render() == ('|block 1 from layout|block 2 from '
'layout|nested block 4 from layout|')
def test_level1(self):
tmpl = env.get_template('level1')
assert tmpl.render() == ('|block 1 from level1|block 2 from '
'layout|nested block 4 from layout|')
def test_level2(self):
tmpl = env.get_template('level2')
assert tmpl.render() == ('|block 1 from level1|nested block 5 from '
'level2|nested block 4 from layout|')
def test_level3(self):
tmpl = env.get_template('level3')
assert tmpl.render() == ('|block 1 from level1|block 5 from level3|'
'block 4 from level3|')
def test_level4(sel):
tmpl = env.get_template('level4')
assert tmpl.render() == ('|block 1 from level1|block 5 from '
'level3|block 3 from level4|')
def test_super(self):
env = Environment(loader=DictLoader({
'a': '{% block intro %}INTRO{% endblock %}|'
'BEFORE|{% block data %}INNER{% endblock %}|AFTER',
'b': '{% extends "a" %}{% block data %}({{ '
'super() }}){% endblock %}',
'c': '{% extends "b" %}{% block intro %}--{{ '
'super() }}--{% endblock %}\n{% block data '
'%}[{{ super() }}]{% endblock %}'
}))
tmpl = env.get_template('c')
assert tmpl.render() == '--INTRO--|BEFORE|[(INNER)]|AFTER'
def test_working(self):
tmpl = env.get_template('working')
def test_reuse_blocks(self):
tmpl = env.from_string('{{ self.foo() }}|{% block foo %}42'
'{% endblock %}|{{ self.foo() }}')
assert tmpl.render() == '42|42|42'
def test_preserve_blocks(self):
env = Environment(loader=DictLoader({
'a': '{% if false %}{% block x %}A{% endblock %}{% endif %}{{ self.x() }}',
'b': '{% extends "a" %}{% block x %}B{{ super() }}{% endblock %}'
}))
tmpl = env.get_template('b')
assert tmpl.render() == 'BA'
def test_dynamic_inheritance(self):
env = Environment(loader=DictLoader({
'master1': 'MASTER1{% block x %}{% endblock %}',
'master2': 'MASTER2{% block x %}{% endblock %}',
'child': '{% extends master %}{% block x %}CHILD{% endblock %}'
}))
tmpl = env.get_template('child')
for m in range(1, 3):
assert tmpl.render(master='master%d' % m) == 'MASTER%dCHILD' % m
def test_multi_inheritance(self):
env = Environment(loader=DictLoader({
'master1': 'MASTER1{% block x %}{% endblock %}',
'master2': 'MASTER2{% block x %}{% endblock %}',
'child': '''{% if master %}{% extends master %}{% else %}{% extends
'master1' %}{% endif %}{% block x %}CHILD{% endblock %}'''
}))
tmpl = env.get_template('child')
assert tmpl.render(master='master2') == 'MASTER2CHILD'
assert tmpl.render(master='master1') == 'MASTER1CHILD'
assert tmpl.render() == 'MASTER1CHILD'
def test_scoped_block(self):
env = Environment(loader=DictLoader({
'master.html': '{% for item in seq %}[{% block item scoped %}'
'{% endblock %}]{% endfor %}'
}))
t = env.from_string('{% extends "master.html" %}{% block item %}'
'{{ item }}{% endblock %}')
assert t.render(seq=list(range(5))) == '[0][1][2][3][4]'
def test_super_in_scoped_block(self):
env = Environment(loader=DictLoader({
'master.html': '{% for item in seq %}[{% block item scoped %}'
'{{ item }}{% endblock %}]{% endfor %}'
}))
t = env.from_string('{% extends "master.html" %}{% block item %}'
'{{ super() }}|{{ item * 2 }}{% endblock %}')
assert t.render(seq=list(range(5))) == '[0|0][1|2][2|4][3|6][4|8]'
def test_scoped_block_after_inheritance(self):
env = Environment(loader=DictLoader({
'layout.html': '''
{% block useless %}{% endblock %}
''',
'index.html': '''
{%- extends 'layout.html' %}
{% from 'helpers.html' import foo with context %}
{% block useless %}
{% for x in [1, 2, 3] %}
{% block testing scoped %}
{{ foo(x) }}
{% endblock %}
{% endfor %}
{% endblock %}
''',
'helpers.html': '''
{% macro foo(x) %}{{ the_foo + x }}{% endmacro %}
'''
}))
rv = env.get_template('index.html').render(the_foo=42).split()
assert rv == ['43', '44', '45']
class BugFixTestCase(JinjaTestCase):
def test_fixed_macro_scoping_bug(self):
assert Environment(loader=DictLoader({
'test.html': '''\
{% extends 'details.html' %}
{% macro my_macro() %}
my_macro
{% endmacro %}
{% block inner_box %}
{{ my_macro() }}
{% endblock %}
''',
'details.html': '''\
{% extends 'standard.html' %}
{% macro my_macro() %}
my_macro
{% endmacro %}
{% block content %}
{% block outer_box %}
outer_box
{% block inner_box %}
inner_box
{% endblock %}
{% endblock %}
{% endblock %}
''',
'standard.html': '''
{% block content %} {% endblock %}
'''
})).get_template("test.html").render().split() == [u'outer_box', u'my_macro']
def test_double_extends(self):
"""Ensures that a template with more than 1 {% extends ... %} usage
raises a ``TemplateError``.
"""
try:
tmpl = env.get_template('doublee')
except Exception as e:
assert isinstance(e, TemplateError)
def suite():
suite = unittest.TestSuite()
suite.addTest(unittest.makeSuite(InheritanceTestCase))
suite.addTest(unittest.makeSuite(BugFixTestCase))
return suite
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