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django/tests/template_tests/test_loaders.py
2016-12-14 10:33:51 -05:00

450 lines
17 KiB
Python

# -*- coding: utf-8 -*-
from __future__ import unicode_literals
import os.path
import sys
import tempfile
import types
import unittest
from contextlib import contextmanager
from django.template import Context, TemplateDoesNotExist
from django.template.engine import Engine
from django.test import SimpleTestCase, ignore_warnings, override_settings
from django.utils import six
from django.utils.deprecation import RemovedInDjango20Warning
from django.utils.functional import lazystr
from .utils import TEMPLATE_DIR
try:
import pkg_resources
except ImportError:
pkg_resources = None
class CachedLoaderTests(SimpleTestCase):
def setUp(self):
self.engine = Engine(
dirs=[TEMPLATE_DIR],
loaders=[
('django.template.loaders.cached.Loader', [
'django.template.loaders.filesystem.Loader',
]),
],
)
def test_get_template(self):
template = self.engine.get_template('index.html')
self.assertEqual(template.origin.name, os.path.join(TEMPLATE_DIR, 'index.html'))
self.assertEqual(template.origin.template_name, 'index.html')
self.assertEqual(template.origin.loader, self.engine.template_loaders[0].loaders[0])
cache = self.engine.template_loaders[0].get_template_cache
self.assertEqual(cache['index.html'], template)
# Run a second time from cache
template = self.engine.get_template('index.html')
self.assertEqual(template.origin.name, os.path.join(TEMPLATE_DIR, 'index.html'))
self.assertEqual(template.origin.template_name, 'index.html')
self.assertEqual(template.origin.loader, self.engine.template_loaders[0].loaders[0])
def test_get_template_missing_debug_off(self):
"""
With template debugging disabled, the raw TemplateDoesNotExist class
should be cached when a template is missing. See ticket #26306 and
docstrings in the cached loader for details.
"""
self.engine.debug = False
with self.assertRaises(TemplateDoesNotExist):
self.engine.get_template('prod-template-missing.html')
e = self.engine.template_loaders[0].get_template_cache['prod-template-missing.html']
self.assertEqual(e, TemplateDoesNotExist)
def test_get_template_missing_debug_on(self):
"""
With template debugging enabled, a TemplateDoesNotExist instance
should be cached when a template is missing.
"""
self.engine.debug = True
with self.assertRaises(TemplateDoesNotExist):
self.engine.get_template('debug-template-missing.html')
e = self.engine.template_loaders[0].get_template_cache['debug-template-missing.html']
self.assertIsInstance(e, TemplateDoesNotExist)
self.assertEqual(e.args[0], 'debug-template-missing.html')
@unittest.skipIf(six.PY2, "Python 2 doesn't set extra exception attributes")
def test_cached_exception_no_traceback(self):
"""
When a TemplateDoesNotExist instance is cached, the cached instance
should not contain the __traceback__, __context__, or __cause__
attributes that Python sets when raising exceptions.
"""
self.engine.debug = True
with self.assertRaises(TemplateDoesNotExist):
self.engine.get_template('no-traceback-in-cache.html')
e = self.engine.template_loaders[0].get_template_cache['no-traceback-in-cache.html']
error_msg = "Cached TemplateDoesNotExist must not have been thrown."
self.assertIsNone(e.__traceback__, error_msg)
self.assertIsNone(e.__context__, error_msg)
self.assertIsNone(e.__cause__, error_msg)
@ignore_warnings(category=RemovedInDjango20Warning)
def test_load_template(self):
loader = self.engine.template_loaders[0]
template, origin = loader.load_template('index.html')
self.assertEqual(template.origin.template_name, 'index.html')
cache = self.engine.template_loaders[0].template_cache
self.assertEqual(cache['index.html'][0], template)
# Run a second time from cache
loader = self.engine.template_loaders[0]
source, name = loader.load_template('index.html')
self.assertEqual(template.origin.template_name, 'index.html')
@ignore_warnings(category=RemovedInDjango20Warning)
def test_load_template_missing(self):
"""
#19949 -- TemplateDoesNotExist exceptions should be cached.
"""
loader = self.engine.template_loaders[0]
self.assertNotIn('missing.html', loader.template_cache)
with self.assertRaises(TemplateDoesNotExist):
loader.load_template("missing.html")
self.assertEqual(
loader.template_cache["missing.html"],
TemplateDoesNotExist,
"Cached loader failed to cache the TemplateDoesNotExist exception",
)
@ignore_warnings(category=RemovedInDjango20Warning)
def test_load_nonexistent_cached_template(self):
loader = self.engine.template_loaders[0]
template_name = 'nonexistent.html'
# fill the template cache
with self.assertRaises(TemplateDoesNotExist):
loader.find_template(template_name)
with self.assertRaisesMessage(TemplateDoesNotExist, template_name):
loader.get_template(template_name)
def test_templatedir_caching(self):
"""
#13573 -- Template directories should be part of the cache key.
"""
# Retrieve a template specifying a template directory to check
t1, name = self.engine.find_template('test.html', (os.path.join(TEMPLATE_DIR, 'first'),))
# Now retrieve the same template name, but from a different directory
t2, name = self.engine.find_template('test.html', (os.path.join(TEMPLATE_DIR, 'second'),))
# The two templates should not have the same content
self.assertNotEqual(t1.render(Context({})), t2.render(Context({})))
def test_template_name_leading_dash_caching(self):
"""
#26536 -- A leading dash in a template name shouldn't be stripped
from its cache key.
"""
self.assertEqual(self.engine.template_loaders[0].cache_key('-template.html', []), '-template.html')
def test_template_name_lazy_string(self):
"""
#26603 -- A template name specified as a lazy string should be forced
to text before computing its cache key.
"""
self.assertEqual(self.engine.template_loaders[0].cache_key(lazystr('template.html'), []), 'template.html')
@unittest.skipUnless(pkg_resources, 'setuptools is not installed')
class EggLoaderTests(SimpleTestCase):
@contextmanager
def create_egg(self, name, resources):
"""
Creates a mock egg with a list of resources.
name: The name of the module.
resources: A dictionary of template names mapped to file-like objects.
"""
if six.PY2:
name = name.encode('utf-8')
class MockLoader(object):
pass
class MockProvider(pkg_resources.NullProvider):
def __init__(self, module):
pkg_resources.NullProvider.__init__(self, module)
self.module = module
def _has(self, path):
return path in self.module._resources
def _isdir(self, path):
return False
def get_resource_stream(self, manager, resource_name):
return self.module._resources[resource_name]
def _get(self, path):
return self.module._resources[path].read()
def _fn(self, base, resource_name):
return os.path.normcase(resource_name)
egg = types.ModuleType(name)
egg.__loader__ = MockLoader()
egg.__path__ = ['/some/bogus/path/']
egg.__file__ = '/some/bogus/path/__init__.pyc'
egg._resources = resources
sys.modules[name] = egg
pkg_resources._provider_factories[MockLoader] = MockProvider
try:
yield
finally:
del sys.modules[name]
del pkg_resources._provider_factories[MockLoader]
@classmethod
@ignore_warnings(category=RemovedInDjango20Warning)
def setUpClass(cls):
cls.engine = Engine(loaders=[
'django.template.loaders.eggs.Loader',
])
cls.loader = cls.engine.template_loaders[0]
super(EggLoaderTests, cls).setUpClass()
def test_get_template(self):
templates = {
os.path.normcase('templates/y.html'): six.StringIO("y"),
}
with self.create_egg('egg', templates):
with override_settings(INSTALLED_APPS=['egg']):
template = self.engine.get_template("y.html")
self.assertEqual(template.origin.name, 'egg:egg:templates/y.html')
self.assertEqual(template.origin.template_name, 'y.html')
self.assertEqual(template.origin.loader, self.engine.template_loaders[0])
output = template.render(Context({}))
self.assertEqual(output, "y")
@ignore_warnings(category=RemovedInDjango20Warning)
def test_load_template_source(self):
loader = self.engine.template_loaders[0]
templates = {
os.path.normcase('templates/y.html'): six.StringIO("y"),
}
with self.create_egg('egg', templates):
with override_settings(INSTALLED_APPS=['egg']):
source, name = loader.load_template_source('y.html')
self.assertEqual(source.strip(), 'y')
self.assertEqual(name, 'egg:egg:templates/y.html')
def test_non_existing(self):
"""
Template loading fails if the template is not in the egg.
"""
with self.create_egg('egg', {}):
with override_settings(INSTALLED_APPS=['egg']):
with self.assertRaises(TemplateDoesNotExist):
self.engine.get_template('not-existing.html')
def test_not_installed(self):
"""
Template loading fails if the egg is not in INSTALLED_APPS.
"""
templates = {
os.path.normcase('templates/y.html'): six.StringIO("y"),
}
with self.create_egg('egg', templates):
with self.assertRaises(TemplateDoesNotExist):
self.engine.get_template('y.html')
class FileSystemLoaderTests(SimpleTestCase):
@classmethod
def setUpClass(cls):
cls.engine = Engine(dirs=[TEMPLATE_DIR], loaders=['django.template.loaders.filesystem.Loader'])
super(FileSystemLoaderTests, cls).setUpClass()
@contextmanager
def set_dirs(self, dirs):
original_dirs = self.engine.dirs
self.engine.dirs = dirs
try:
yield
finally:
self.engine.dirs = original_dirs
@contextmanager
def source_checker(self, dirs):
loader = self.engine.template_loaders[0]
def check_sources(path, expected_sources):
expected_sources = [os.path.abspath(s) for s in expected_sources]
self.assertEqual(
[origin.name for origin in loader.get_template_sources(path)],
expected_sources,
)
with self.set_dirs(dirs):
yield check_sources
def test_get_template(self):
template = self.engine.get_template('index.html')
self.assertEqual(template.origin.name, os.path.join(TEMPLATE_DIR, 'index.html'))
self.assertEqual(template.origin.template_name, 'index.html')
self.assertEqual(template.origin.loader, self.engine.template_loaders[0])
self.assertEqual(template.origin.loader_name, 'django.template.loaders.filesystem.Loader')
def test_loaders_dirs(self):
engine = Engine(loaders=[('django.template.loaders.filesystem.Loader', [TEMPLATE_DIR])])
template = engine.get_template('index.html')
self.assertEqual(template.origin.name, os.path.join(TEMPLATE_DIR, 'index.html'))
def test_loaders_dirs_empty(self):
"""An empty dirs list in loaders overrides top level dirs."""
engine = Engine(dirs=[TEMPLATE_DIR], loaders=[('django.template.loaders.filesystem.Loader', [])])
with self.assertRaises(TemplateDoesNotExist):
engine.get_template('index.html')
@ignore_warnings(category=RemovedInDjango20Warning)
def test_load_template_source(self):
loader = self.engine.template_loaders[0]
source, name = loader.load_template_source('index.html')
self.assertEqual(source.strip(), 'index')
self.assertEqual(name, os.path.join(TEMPLATE_DIR, 'index.html'))
def test_directory_security(self):
with self.source_checker(['/dir1', '/dir2']) as check_sources:
check_sources('index.html', ['/dir1/index.html', '/dir2/index.html'])
check_sources('/etc/passwd', [])
check_sources('etc/passwd', ['/dir1/etc/passwd', '/dir2/etc/passwd'])
check_sources('../etc/passwd', [])
check_sources('../../../etc/passwd', [])
check_sources('/dir1/index.html', ['/dir1/index.html'])
check_sources('../dir2/index.html', ['/dir2/index.html'])
check_sources('/dir1blah', [])
check_sources('../dir1blah', [])
def test_unicode_template_name(self):
with self.source_checker(['/dir1', '/dir2']) as check_sources:
# UTF-8 bytestrings are permitted.
check_sources(b'\xc3\x85ngstr\xc3\xb6m', ['/dir1/Ångström', '/dir2/Ångström'])
# Unicode strings are permitted.
check_sources('Ångström', ['/dir1/Ångström', '/dir2/Ångström'])
def test_utf8_bytestring(self):
"""
Invalid UTF-8 encoding in bytestrings should raise a useful error
"""
engine = Engine()
loader = engine.template_loaders[0]
with self.assertRaises(UnicodeDecodeError):
list(loader.get_template_sources(b'\xc3\xc3', ['/dir1']))
def test_unicode_dir_name(self):
with self.source_checker([b'/Stra\xc3\x9fe']) as check_sources:
check_sources('Ångström', ['/Straße/Ångström'])
check_sources(b'\xc3\x85ngstr\xc3\xb6m', ['/Straße/Ångström'])
@unittest.skipUnless(
os.path.normcase('/TEST') == os.path.normpath('/test'),
"This test only runs on case-sensitive file systems.",
)
def test_case_sensitivity(self):
with self.source_checker(['/dir1', '/DIR2']) as check_sources:
check_sources('index.html', ['/dir1/index.html', '/DIR2/index.html'])
check_sources('/DIR1/index.HTML', ['/DIR1/index.HTML'])
def test_file_does_not_exist(self):
with self.assertRaises(TemplateDoesNotExist):
self.engine.get_template('doesnotexist.html')
@unittest.skipIf(
sys.platform == 'win32',
"Python on Windows doesn't have working os.chmod().",
)
def test_permissions_error(self):
with tempfile.NamedTemporaryFile() as tmpfile:
tmpdir = os.path.dirname(tmpfile.name)
tmppath = os.path.join(tmpdir, tmpfile.name)
os.chmod(tmppath, 0o0222)
with self.set_dirs([tmpdir]):
with self.assertRaisesMessage(IOError, 'Permission denied'):
self.engine.get_template(tmpfile.name)
def test_notafile_error(self):
with self.assertRaises(IOError):
self.engine.get_template('first')
class AppDirectoriesLoaderTests(SimpleTestCase):
@classmethod
def setUpClass(cls):
cls.engine = Engine(
loaders=['django.template.loaders.app_directories.Loader'],
)
super(AppDirectoriesLoaderTests, cls).setUpClass()
@override_settings(INSTALLED_APPS=['template_tests'])
def test_get_template(self):
template = self.engine.get_template('index.html')
self.assertEqual(template.origin.name, os.path.join(TEMPLATE_DIR, 'index.html'))
self.assertEqual(template.origin.template_name, 'index.html')
self.assertEqual(template.origin.loader, self.engine.template_loaders[0])
@ignore_warnings(category=RemovedInDjango20Warning)
@override_settings(INSTALLED_APPS=['template_tests'])
def test_load_template_source(self):
loader = self.engine.template_loaders[0]
source, name = loader.load_template_source('index.html')
self.assertEqual(source.strip(), 'index')
self.assertEqual(name, os.path.join(TEMPLATE_DIR, 'index.html'))
@override_settings(INSTALLED_APPS=[])
def test_not_installed(self):
with self.assertRaises(TemplateDoesNotExist):
self.engine.get_template('index.html')
class LocmemLoaderTests(SimpleTestCase):
@classmethod
def setUpClass(cls):
cls.engine = Engine(
loaders=[('django.template.loaders.locmem.Loader', {
'index.html': 'index',
})],
)
super(LocmemLoaderTests, cls).setUpClass()
def test_get_template(self):
template = self.engine.get_template('index.html')
self.assertEqual(template.origin.name, 'index.html')
self.assertEqual(template.origin.template_name, 'index.html')
self.assertEqual(template.origin.loader, self.engine.template_loaders[0])
@ignore_warnings(category=RemovedInDjango20Warning)
def test_load_template_source(self):
loader = self.engine.template_loaders[0]
source, name = loader.load_template_source('index.html')
self.assertEqual(source.strip(), 'index')
self.assertEqual(name, 'index.html')