django/tests/template_tests/tests.py

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# -*- coding: utf-8 -*-
from __future__ import unicode_literals
import os
import sys
import unittest
from django import template
from django.contrib.auth.models import Group
from django.core import urlresolvers
from django.template import (
Context, RequestContext, Template, TemplateSyntaxError,
base as template_base, engines, loader,
)
from django.template.engine import Engine
from django.template.loaders import app_directories, filesystem
from django.test import RequestFactory, SimpleTestCase
from django.test.utils import (
extend_sys_path, ignore_warnings, override_settings,
)
from django.utils._os import upath
from django.utils.deprecation import RemovedInDjango20Warning
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TESTS_DIR = os.path.dirname(os.path.dirname(os.path.abspath(upath(__file__))))
TEMPLATES_DIR = os.path.join(TESTS_DIR, 'templates')
class TemplateLoaderTests(SimpleTestCase):
def test_loaders_security(self):
ad_loader = app_directories.Loader(Engine.get_default())
fs_loader = filesystem.Loader(Engine.get_default())
def test_template_sources(path, template_dirs, expected_sources):
if isinstance(expected_sources, list):
# Fix expected sources so they are abspathed
expected_sources = [os.path.abspath(s) for s in expected_sources]
# Test the two loaders (app_directores and filesystem).
func1 = lambda p, t: list(ad_loader.get_template_sources(p, t))
func2 = lambda p, t: list(fs_loader.get_template_sources(p, t))
for func in (func1, func2):
if isinstance(expected_sources, list):
self.assertEqual(func(path, template_dirs), expected_sources)
else:
self.assertRaises(expected_sources, func, path, template_dirs)
template_dirs = ['/dir1', '/dir2']
test_template_sources('index.html', template_dirs,
['/dir1/index.html', '/dir2/index.html'])
test_template_sources('/etc/passwd', template_dirs, [])
test_template_sources('etc/passwd', template_dirs,
['/dir1/etc/passwd', '/dir2/etc/passwd'])
test_template_sources('../etc/passwd', template_dirs, [])
test_template_sources('../../../etc/passwd', template_dirs, [])
test_template_sources('/dir1/index.html', template_dirs,
['/dir1/index.html'])
test_template_sources('../dir2/index.html', template_dirs,
['/dir2/index.html'])
test_template_sources('/dir1blah', template_dirs, [])
test_template_sources('../dir1blah', template_dirs, [])
# UTF-8 bytestrings are permitted.
test_template_sources(b'\xc3\x85ngstr\xc3\xb6m', template_dirs,
['/dir1/Ångström', '/dir2/Ångström'])
# Unicode strings are permitted.
test_template_sources('Ångström', template_dirs,
['/dir1/Ångström', '/dir2/Ångström'])
test_template_sources('Ångström', [b'/Stra\xc3\x9fe'], ['/Straße/Ångström'])
test_template_sources(b'\xc3\x85ngstr\xc3\xb6m', [b'/Stra\xc3\x9fe'],
['/Straße/Ångström'])
# Invalid UTF-8 encoding in bytestrings is not. Should raise a
# semi-useful error message.
test_template_sources(b'\xc3\xc3', template_dirs, UnicodeDecodeError)
# Case insensitive tests (for win32). Not run unless we're on
# a case insensitive operating system.
if os.path.normcase('/TEST') == os.path.normpath('/test'):
template_dirs = ['/dir1', '/DIR2']
test_template_sources('index.html', template_dirs,
['/dir1/index.html', '/DIR2/index.html'])
test_template_sources('/DIR1/index.HTML', template_dirs,
['/DIR1/index.HTML'])
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@override_settings(TEMPLATES=[{
'BACKEND': 'django.template.backends.django.DjangoTemplates',
'DIRS': [TEMPLATES_DIR],
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'OPTIONS': {
# Turn DEBUG on, so that the origin file name will be kept with
# the compiled templates.
'debug': True,
}
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}])
def test_loader_debug_origin(self):
load_name = 'login.html'
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# We rely on the fact the file system and app directories loaders both
# inherit the load_template method from the base Loader class, so we
# only need to test one of them.
template = loader.get_template(load_name).template
template_name = template.nodelist[0].source[0].name
self.assertTrue(template_name.endswith(load_name),
'Template loaded by filesystem loader has incorrect name for debug page: %s' % template_name)
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@override_settings(TEMPLATES=[{
'BACKEND': 'django.template.backends.django.DjangoTemplates',
'DIRS': [TEMPLATES_DIR],
'OPTIONS': {
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'debug': True,
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'loaders': [
('django.template.loaders.cached.Loader', [
'django.template.loaders.filesystem.Loader',
]),
],
},
}])
def test_cached_loader_debug_origin(self):
load_name = 'login.html'
# Test the cached loader separately since it overrides load_template.
template = loader.get_template(load_name).template
template_name = template.nodelist[0].source[0].name
self.assertTrue(template_name.endswith(load_name),
'Template loaded through cached loader has incorrect name for debug page: %s' % template_name)
template = loader.get_template(load_name).template
template_name = template.nodelist[0].source[0].name
self.assertTrue(template_name.endswith(load_name),
'Cached template loaded through cached loader has incorrect name for debug page: %s' % template_name)
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@override_settings(DEBUG=True)
def test_loader_origin(self):
template = loader.get_template('login.html')
self.assertEqual(template.origin.loadname, 'login.html')
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@override_settings(DEBUG=True)
def test_string_origin(self):
template = Template('string template')
self.assertEqual(template.origin.source, 'string template')
def test_debug_false_origin(self):
template = loader.get_template('login.html')
self.assertEqual(template.origin, None)
# Test the base loader class via the app loader. load_template
# from base is used by all shipped loaders excepting cached,
# which has its own test.
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@override_settings(TEMPLATES=[{
'BACKEND': 'django.template.backends.django.DjangoTemplates',
'APP_DIRS': True,
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'OPTIONS': {
# Enable debug, otherwise the exception raised during
# {% include %} processing will be suppressed.
'debug': True,
}
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}])
def test_include_missing_template(self):
"""
Tests that the correct template is identified as not existing
when {% include %} specifies a template that does not exist.
"""
load_name = 'test_include_error.html'
r = None
try:
tmpl = loader.select_template([load_name])
r = tmpl.render()
except template.TemplateDoesNotExist as e:
self.assertEqual(e.args[0], 'missing.html')
self.assertEqual(r, None, 'Template rendering unexpectedly succeeded, produced: ->%r<-' % r)
# Test the base loader class via the app loader. load_template
# from base is used by all shipped loaders excepting cached,
# which has its own test.
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@override_settings(TEMPLATES=[{
'BACKEND': 'django.template.backends.django.DjangoTemplates',
'APP_DIRS': True,
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'OPTIONS': {
# Enable debug, otherwise the exception raised during
# {% include %} processing will be suppressed.
'debug': True,
}
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}])
def test_extends_include_missing_baseloader(self):
"""
Tests that the correct template is identified as not existing
when {% extends %} specifies a template that does exist, but
that template has an {% include %} of something that does not
exist. See #12787.
"""
load_name = 'test_extends_error.html'
tmpl = loader.get_template(load_name)
r = None
try:
r = tmpl.render()
except template.TemplateDoesNotExist as e:
self.assertEqual(e.args[0], 'missing.html')
self.assertEqual(r, None, 'Template rendering unexpectedly succeeded, produced: ->%r<-' % r)
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@override_settings(TEMPLATES=[{
'BACKEND': 'django.template.backends.django.DjangoTemplates',
'OPTIONS': {
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'debug': True,
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'loaders': [
('django.template.loaders.cached.Loader', [
'django.template.loaders.app_directories.Loader',
]),
],
},
}])
def test_extends_include_missing_cachedloader(self):
"""
Same as test_extends_include_missing_baseloader, only tests
behavior of the cached loader instead of base loader.
"""
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load_name = 'test_extends_error.html'
tmpl = loader.get_template(load_name)
r = None
try:
r = tmpl.render()
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except template.TemplateDoesNotExist as e:
self.assertEqual(e.args[0], 'missing.html')
self.assertEqual(r, None, 'Template rendering unexpectedly succeeded, produced: ->%r<-' % r)
# For the cached loader, repeat the test, to ensure the first attempt did not cache a
# result that behaves incorrectly on subsequent attempts.
tmpl = loader.get_template(load_name)
try:
tmpl.render()
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except template.TemplateDoesNotExist as e:
self.assertEqual(e.args[0], 'missing.html')
self.assertEqual(r, None, 'Template rendering unexpectedly succeeded, produced: ->%r<-' % r)
def test_include_template_argument(self):
"""
Support any render() supporting object
"""
ctx = Context({
'tmpl': Template('This worked!'),
})
outer_tmpl = Template('{% include tmpl %}')
output = outer_tmpl.render(ctx)
self.assertEqual(output, 'This worked!')
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@override_settings(TEMPLATES=[{
'BACKEND': 'django.template.backends.django.DjangoTemplates',
'OPTIONS': {
'debug': True,
},
}])
def test_include_immediate_missing(self):
"""
Test that an {% include %} tag with a literal string referencing a
template that does not exist does not raise an exception at parse
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time. Regression test for #16417.
"""
tmpl = Template('{% include "this_does_not_exist.html" %}')
self.assertIsInstance(tmpl, Template)
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@override_settings(TEMPLATES=[{
'BACKEND': 'django.template.backends.django.DjangoTemplates',
'APP_DIRS': True,
'OPTIONS': {
'debug': True,
},
}])
def test_include_recursive(self):
comments = [
{
'comment': 'A1',
'children': [
{'comment': 'B1', 'children': []},
{'comment': 'B2', 'children': []},
{'comment': 'B3', 'children': [
{'comment': 'C1', 'children': []}
]},
]
}
]
t = loader.get_template('recursive_include.html')
self.assertEqual(
"Recursion! A1 Recursion! B1 B2 B3 Recursion! C1",
t.render({'comments': comments}).replace(' ', '').replace('\n', ' ').strip(),
)
class TemplateRegressionTests(SimpleTestCase):
def test_token_smart_split(self):
# Regression test for #7027
token = template_base.Token(template_base.TOKEN_BLOCK, 'sometag _("Page not found") value|yesno:_("yes,no")')
split = token.split_contents()
self.assertEqual(split, ["sometag", '_("Page not found")', 'value|yesno:_("yes,no")'])
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@override_settings(SETTINGS_MODULE=None, DEBUG=True)
def test_url_reverse_no_settings_module(self):
# Regression test for #9005
t = Template('{% url will_not_match %}')
c = Context()
with self.assertRaises(urlresolvers.NoReverseMatch):
t.render(c)
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@override_settings(
TEMPLATES=[{
'BACKEND': 'django.template.backends.django.DjangoTemplates',
'OPTIONS': {'string_if_invalid': '%s is invalid'},
}],
SETTINGS_MODULE='also_something',
)
def test_url_reverse_view_name(self):
# Regression test for #19827
t = Template('{% url will_not_match %}')
c = Context()
try:
t.render(c)
except urlresolvers.NoReverseMatch:
tb = sys.exc_info()[2]
depth = 0
while tb.tb_next is not None:
tb = tb.tb_next
depth += 1
self.assertGreater(depth, 5,
"The traceback context was lost when reraising the traceback. See #19827")
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@override_settings(DEBUG=True)
def test_no_wrapped_exception(self):
"""
The template system doesn't wrap exceptions, but annotates them.
Refs #16770
"""
c = Context({"coconuts": lambda: 42 / 0})
t = Template("{{ coconuts }}")
with self.assertRaises(ZeroDivisionError) as cm:
t.render(c)
self.assertEqual(cm.exception.django_template_source[1], (0, 14))
def test_invalid_block_suggestion(self):
# See #7876
try:
Template("{% if 1 %}lala{% endblock %}{% endif %}")
except TemplateSyntaxError as e:
self.assertEqual(e.args[0], "Invalid block tag: 'endblock', expected 'elif', 'else' or 'endif'")
def test_ifchanged_concurrency(self):
# Tests for #15849
template = Template('[0{% for x in foo %},{% with var=get_value %}{% ifchanged %}{{ var }}{% endifchanged %}{% endwith %}{% endfor %}]')
# Using generator to mimic concurrency.
# The generator is not passed to the 'for' loop, because it does a list(values)
# instead, call gen.next() in the template to control the generator.
def gen():
yield 1
yield 2
# Simulate that another thread is now rendering.
# When the IfChangeNode stores state at 'self' it stays at '3' and skip the last yielded value below.
iter2 = iter([1, 2, 3])
output2 = template.render(Context({'foo': range(3), 'get_value': lambda: next(iter2)}))
self.assertEqual(output2, '[0,1,2,3]', 'Expected [0,1,2,3] in second parallel template, got {}'.format(output2))
yield 3
gen1 = gen()
output1 = template.render(Context({'foo': range(3), 'get_value': lambda: next(gen1)}))
self.assertEqual(output1, '[0,1,2,3]', 'Expected [0,1,2,3] in first template, got {}'.format(output1))
def test_cache_regression_20130(self):
t = Template('{% load cache %}{% cache 1 regression_20130 %}foo{% endcache %}')
cachenode = t.nodelist[1]
self.assertEqual(cachenode.fragment_name, 'regression_20130')
@override_settings(CACHES={
'default': {
'BACKEND': 'django.core.cache.backends.locmem.LocMemCache',
'LOCATION': 'default',
},
'template_fragments': {
'BACKEND': 'django.core.cache.backends.locmem.LocMemCache',
'LOCATION': 'fragments',
},
})
def test_cache_fragment_cache(self):
"""
When a cache called "template_fragments" is present, the cache tag
will use it in preference to 'default'
"""
t1 = Template('{% load cache %}{% cache 1 fragment %}foo{% endcache %}')
t2 = Template('{% load cache %}{% cache 1 fragment using="default" %}bar{% endcache %}')
ctx = Context()
o1 = t1.render(ctx)
o2 = t2.render(ctx)
self.assertEqual(o1, 'foo')
self.assertEqual(o2, 'bar')
def test_cache_missing_backend(self):
"""
When a cache that doesn't exist is specified, the cache tag will
raise a TemplateSyntaxError
'"""
t = Template('{% load cache %}{% cache 1 backend using="unknown" %}bar{% endcache %}')
ctx = Context()
with self.assertRaises(TemplateSyntaxError):
t.render(ctx)
def test_ifchanged_render_once(self):
""" Test for ticket #19890. The content of ifchanged template tag was
rendered twice."""
template = Template('{% ifchanged %}{% cycle "1st time" "2nd time" %}{% endifchanged %}')
output = template.render(Context({}))
self.assertEqual(output, '1st time')
def test_super_errors(self):
"""
Test behavior of the raise errors into included blocks.
See #18169
"""
t = loader.get_template('included_content.html')
with self.assertRaises(urlresolvers.NoReverseMatch):
t.render()
def test_debug_tag_non_ascii(self):
"""
Test non-ASCII model representation in debug output (#23060).
"""
Group.objects.create(name="清風")
c1 = Context({"objs": Group.objects.all()})
t1 = Template('{% debug %}')
self.assertIn("清風", t1.render(c1))
def test_extends_generic_template(self):
"""
{% extends %} accepts django.template.backends.django.Template (#24338).
"""
parent = engines['django'].from_string(
'{% block content %}parent{% endblock %}')
child = engines['django'].from_string(
'{% extends parent %}{% block content %}child{% endblock %}')
self.assertEqual(child.render({'parent': parent}), 'child')
class TemplateTagLoading(SimpleTestCase):
def setUp(self):
self.egg_dir = '%s/eggs' % os.path.dirname(upath(__file__))
def test_load_error(self):
ttext = "{% load broken_tag %}"
self.assertRaises(template.TemplateSyntaxError, template.Template, ttext)
try:
template.Template(ttext)
except template.TemplateSyntaxError as e:
self.assertIn('ImportError', e.args[0])
self.assertIn('Xtemplate', e.args[0])
def test_load_error_egg(self):
ttext = "{% load broken_egg %}"
egg_name = '%s/tagsegg.egg' % self.egg_dir
with extend_sys_path(egg_name):
with self.assertRaises(template.TemplateSyntaxError):
with self.settings(INSTALLED_APPS=['tagsegg']):
template.Template(ttext)
try:
with self.settings(INSTALLED_APPS=['tagsegg']):
template.Template(ttext)
except template.TemplateSyntaxError as e:
self.assertIn('ImportError', e.args[0])
self.assertIn('Xtemplate', e.args[0])
def test_load_working_egg(self):
ttext = "{% load working_egg %}"
egg_name = '%s/tagsegg.egg' % self.egg_dir
with extend_sys_path(egg_name):
with self.settings(INSTALLED_APPS=['tagsegg']):
template.Template(ttext)
class RequestContextTests(unittest.TestCase):
def setUp(self):
self.fake_request = RequestFactory().get('/')
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@override_settings(TEMPLATES=[{
'BACKEND': 'django.template.backends.django.DjangoTemplates',
'OPTIONS': {
'loaders': [
('django.template.loaders.locmem.Loader', {
'child': '{{ var|default:"none" }}',
}),
],
},
}])
def test_include_only(self):
"""
Regression test for #15721, ``{% include %}`` and ``RequestContext``
not playing together nicely.
"""
ctx = RequestContext(self.fake_request, {'var': 'parent'})
self.assertEqual(
template.Template('{% include "child" %}').render(ctx),
'parent'
)
self.assertEqual(
template.Template('{% include "child" only %}').render(ctx),
'none'
)
def test_stack_size(self):
"""
Regression test for #7116, Optimize RequetsContext construction
"""
ctx = RequestContext(self.fake_request, {})
# The stack should now contain 3 items:
# [builtins, supplied context, context processor]
self.assertEqual(len(ctx.dicts), 3)
def test_context_comparable(self):
# Create an engine without any context processors.
engine = Engine()
test_data = {'x': 'y', 'v': 'z', 'd': {'o': object, 'a': 'b'}}
# test comparing RequestContext to prevent problems if somebody
# adds __eq__ in the future
request = RequestFactory().get('/')
self.assertEqual(
RequestContext(request, dict_=test_data, engine=engine),
RequestContext(request, dict_=test_data, engine=engine))
@ignore_warnings(category=RemovedInDjango20Warning)
class SSITests(SimpleTestCase):
def setUp(self):
self.this_dir = os.path.dirname(os.path.abspath(upath(__file__)))
self.ssi_dir = os.path.join(self.this_dir, "templates", "first")
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self.engine = Engine(allowed_include_roots=(self.ssi_dir,))
def render_ssi(self, path):
# the path must exist for the test to be reliable
self.assertTrue(os.path.exists(path))
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return self.engine.from_string('{%% ssi "%s" %%}' % path).render(Context({}))
def test_allowed_paths(self):
acceptable_path = os.path.join(self.ssi_dir, "..", "first", "test.html")
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self.assertEqual(self.render_ssi(acceptable_path), 'First template\n')
def test_relative_include_exploit(self):
"""
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May not bypass allowed_include_roots with relative paths
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e.g. if allowed_include_roots = ("/var/www",), it should not be
possible to do {% ssi "/var/www/../../etc/passwd" %}
"""
disallowed_paths = [
os.path.join(self.ssi_dir, "..", "ssi_include.html"),
os.path.join(self.ssi_dir, "..", "second", "test.html"),
]
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for disallowed_path in disallowed_paths:
self.assertEqual(self.render_ssi(disallowed_path), '')