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"""
Test cases for the template loaders
Note: This test requires setuptools!
"""
from django.conf import settings
if __name__ == '__main__':
settings.configure()
import unittest
import sys
import pkg_resources
import imp
import StringIO
import os.path
import warnings
from django.template import TemplateDoesNotExist, Context
from django.template.loaders.eggs import load_template_source as lts_egg
from django.template.loaders.eggs import Loader as EggLoader
from django.template import loader
from django.test.utils import get_warnings_state, restore_warnings_state
# Mock classes and objects for pkg_resources functions.
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()
class MockLoader(object):
pass
def create_egg(name, resources):
"""
Creates a mock egg with a list of resources.
name: The name of the module.
resources: A dictionary of resources. Keys are the names and values the data.
"""
egg = imp.new_module(name)
egg.__loader__ = MockLoader()
egg._resources = resources
sys.modules[name] = egg
class DeprecatedEggLoaderTest(unittest.TestCase):
"Test the deprecated load_template_source interface to the egg loader"
def setUp(self):
pkg_resources._provider_factories[MockLoader] = MockProvider
self.empty_egg = create_egg("egg_empty", {})
self.egg_1 = create_egg("egg_1", {
os.path.normcase('templates/y.html') : StringIO.StringIO("y"),
os.path.normcase('templates/x.txt') : StringIO.StringIO("x"),
})
self._old_installed_apps = settings.INSTALLED_APPS
settings.INSTALLED_APPS = []
self._warnings_state = get_warnings_state()
warnings.simplefilter("ignore", PendingDeprecationWarning)
def tearDown(self):
settings.INSTALLED_APPS = self._old_installed_apps
restore_warnings_state(self._warnings_state)
def test_existing(self):
"A template can be loaded from an egg"
settings.INSTALLED_APPS = ['egg_1']
contents, template_name = lts_egg("y.html")
self.assertEqual(contents, "y")
self.assertEqual(template_name, "egg:egg_1:templates/y.html")
class EggLoaderTest(unittest.TestCase):
def setUp(self):
pkg_resources._provider_factories[MockLoader] = MockProvider
self.empty_egg = create_egg("egg_empty", {})
self.egg_1 = create_egg("egg_1", {
os.path.normcase('templates/y.html') : StringIO.StringIO("y"),
os.path.normcase('templates/x.txt') : StringIO.StringIO("x"),
})
self._old_installed_apps = settings.INSTALLED_APPS
settings.INSTALLED_APPS = []
def tearDown(self):
settings.INSTALLED_APPS = self._old_installed_apps
def test_empty(self):
"Loading any template on an empty egg should fail"
settings.INSTALLED_APPS = ['egg_empty']
egg_loader = EggLoader()
self.assertRaises(TemplateDoesNotExist, egg_loader.load_template_source, "not-existing.html")
def test_non_existing(self):
"Template loading fails if the template is not in the egg"
settings.INSTALLED_APPS = ['egg_1']
egg_loader = EggLoader()
self.assertRaises(TemplateDoesNotExist, egg_loader.load_template_source, "not-existing.html")
def test_existing(self):
"A template can be loaded from an egg"
settings.INSTALLED_APPS = ['egg_1']
egg_loader = EggLoader()
contents, template_name = egg_loader.load_template_source("y.html")
self.assertEqual(contents, "y")
self.assertEqual(template_name, "egg:egg_1:templates/y.html")
def test_not_installed(self):
"Loading an existent template from an egg not included in INSTALLED_APPS should fail"
settings.INSTALLED_APPS = []
egg_loader = EggLoader()
self.assertRaises(TemplateDoesNotExist, egg_loader.load_template_source, "y.html")
class CachedLoader(unittest.TestCase):
def setUp(self):
self.old_TEMPLATE_LOADERS = settings.TEMPLATE_LOADERS
settings.TEMPLATE_LOADERS = (
('django.template.loaders.cached.Loader', (
'django.template.loaders.filesystem.Loader',
)
),
)
def tearDown(self):
settings.TEMPLATE_LOADERS = self.old_TEMPLATE_LOADERS
def test_templatedir_caching(self):
"Check that the template directories form part of the template cache key. Refs #13573"
# Retrive a template specifying a template directory to check
t1, name = loader.find_template('test.html', (os.path.join(os.path.dirname(__file__), 'templates', 'first'),))
# Now retrieve the same template name, but from a different directory
t2, name = loader.find_template('test.html', (os.path.join(os.path.dirname(__file__), 'templates', 'second'),))
# The two templates should not have the same content
self.assertNotEqual(t1.render(Context({})), t2.render(Context({})))
if __name__ == "__main__":
unittest.main()
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