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88a2d39159
Wherever possible this filesystem path is derived automatically from the app module's ``__path__`` and ``__file__`` attributes (this avoids any backwards-compatibility problems). AppConfig allows specifying an app's filesystem location explicitly, which overrides all autodetection based on ``__path__`` and ``__file__``. This permits Django to support any type of module as an app (namespace packages, fake modules, modules loaded by other hypothetical non-filesystem module loaders), as long as the app is configured with an explicit filesystem path. Thanks Aymeric for review and discussion.
224 lines
8.0 KiB
Python
224 lines
8.0 KiB
Python
"""
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Test cases for the template loaders
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Note: This test requires setuptools!
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"""
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from django.conf import settings
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if __name__ == '__main__':
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settings.configure()
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import os.path
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import sys
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import types
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import unittest
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try:
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import pkg_resources
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except ImportError:
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pkg_resources = None
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from django.template import TemplateDoesNotExist, Context
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from django.template.loaders.eggs import Loader as EggLoader
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from django.template import loader
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from django.test import TestCase, override_settings
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from django.utils import six
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from django.utils._os import upath
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from django.utils.six import StringIO
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# Mock classes and objects for pkg_resources functions.
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class MockLoader(object):
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pass
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def create_egg(name, resources):
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"""
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Creates a mock egg with a list of resources.
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name: The name of the module.
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resources: A dictionary of resources. Keys are the names and values the data.
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"""
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egg = types.ModuleType(name)
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egg.__loader__ = MockLoader()
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egg.__path__ = ['/some/bogus/path/']
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egg.__file__ = '/some/bogus/path/__init__.pyc'
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egg._resources = resources
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sys.modules[name] = egg
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@unittest.skipUnless(pkg_resources, 'setuptools is not installed')
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class EggLoaderTest(TestCase):
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def setUp(self):
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# Defined here b/c at module scope we may not have pkg_resources
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class MockProvider(pkg_resources.NullProvider):
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def __init__(self, module):
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pkg_resources.NullProvider.__init__(self, module)
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self.module = module
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def _has(self, path):
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return path in self.module._resources
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def _isdir(self, path):
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return False
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def get_resource_stream(self, manager, resource_name):
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return self.module._resources[resource_name]
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def _get(self, path):
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return self.module._resources[path].read()
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def _fn(self, base, resource_name):
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return resource_name
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pkg_resources._provider_factories[MockLoader] = MockProvider
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self.empty_egg = create_egg("egg_empty", {})
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self.egg_1 = create_egg("egg_1", {
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os.path.normcase('templates/y.html'): StringIO("y"),
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os.path.normcase('templates/x.txt'): StringIO("x"),
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})
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@override_settings(INSTALLED_APPS=['egg_empty'])
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def test_empty(self):
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"Loading any template on an empty egg should fail"
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egg_loader = EggLoader()
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self.assertRaises(TemplateDoesNotExist, egg_loader.load_template_source, "not-existing.html")
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@override_settings(INSTALLED_APPS=['egg_1'])
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def test_non_existing(self):
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"Template loading fails if the template is not in the egg"
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egg_loader = EggLoader()
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self.assertRaises(TemplateDoesNotExist, egg_loader.load_template_source, "not-existing.html")
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@override_settings(INSTALLED_APPS=['egg_1'])
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def test_existing(self):
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"A template can be loaded from an egg"
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egg_loader = EggLoader()
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contents, template_name = egg_loader.load_template_source("y.html")
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self.assertEqual(contents, "y")
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self.assertEqual(template_name, "egg:egg_1:templates/y.html")
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def test_not_installed(self):
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"Loading an existent template from an egg not included in any app should fail"
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egg_loader = EggLoader()
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self.assertRaises(TemplateDoesNotExist, egg_loader.load_template_source, "y.html")
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@override_settings(
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TEMPLATE_LOADERS=(
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('django.template.loaders.cached.Loader', (
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'django.template.loaders.filesystem.Loader',
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)),
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)
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)
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class CachedLoader(TestCase):
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def test_templatedir_caching(self):
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"Check that the template directories form part of the template cache key. Refs #13573"
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# Retrive a template specifying a template directory to check
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t1, name = loader.find_template('test.html', (os.path.join(os.path.dirname(upath(__file__)), 'templates', 'first'),))
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# Now retrieve the same template name, but from a different directory
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t2, name = loader.find_template('test.html', (os.path.join(os.path.dirname(upath(__file__)), 'templates', 'second'),))
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# The two templates should not have the same content
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self.assertNotEqual(t1.render(Context({})), t2.render(Context({})))
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def test_missing_template_is_cached(self):
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"#19949 -- Check that the missing template is cached."
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template_loader = loader.find_template_loader(settings.TEMPLATE_LOADERS[0])
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# Empty cache, which may be filled from previous tests.
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template_loader.reset()
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# Check that 'missing.html' isn't already in cache before 'missing.html' is loaded
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self.assertRaises(KeyError, lambda: template_loader.template_cache["missing.html"])
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# Try to load it, it should fail
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self.assertRaises(TemplateDoesNotExist, template_loader.load_template, "missing.html")
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# Verify that the fact that the missing template, which hasn't been found, has actually
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# been cached:
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self.assertEqual(template_loader.template_cache.get("missing.html"),
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TemplateDoesNotExist,
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"Cached template loader doesn't cache file lookup misses. It should.")
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@override_settings(
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TEMPLATE_DIRS=(
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os.path.join(os.path.dirname(upath(__file__)), 'templates'),
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)
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)
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class RenderToStringTest(TestCase):
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def test_basic(self):
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self.assertEqual(loader.render_to_string('test_context.html'), 'obj:')
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def test_basic_context(self):
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self.assertEqual(loader.render_to_string('test_context.html',
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{'obj': 'test'}), 'obj:test')
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def test_existing_context_kept_clean(self):
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context = Context({'obj': 'before'})
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output = loader.render_to_string('test_context.html', {'obj': 'after'},
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context_instance=context)
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self.assertEqual(output, 'obj:after')
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self.assertEqual(context['obj'], 'before')
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def test_empty_list(self):
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six.assertRaisesRegex(self, TemplateDoesNotExist,
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'No template names provided$',
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loader.render_to_string, [])
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def test_select_templates_from_empty_list(self):
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six.assertRaisesRegex(self, TemplateDoesNotExist,
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'No template names provided$',
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loader.select_template, [])
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class TemplateDirsOverrideTest(unittest.TestCase):
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dirs_tuple = (os.path.join(os.path.dirname(upath(__file__)), 'other_templates'),)
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dirs_list = list(dirs_tuple)
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dirs_iter = (dirs_tuple, dirs_list)
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def test_render_to_string(self):
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for dirs in self.dirs_iter:
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self.assertEqual(loader.render_to_string('test_dirs.html', dirs=dirs), 'spam eggs\n')
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def test_get_template(self):
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for dirs in self.dirs_iter:
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template = loader.get_template('test_dirs.html', dirs=dirs)
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self.assertEqual(template.render(Context({})), 'spam eggs\n')
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def test_select_template(self):
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for dirs in self.dirs_iter:
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template = loader.select_template(['test_dirs.html'], dirs=dirs)
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self.assertEqual(template.render(Context({})), 'spam eggs\n')
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@override_settings(
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TEMPLATE_LOADERS=(
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('django.template.loaders.cached.Loader', (
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'django.template.loaders.filesystem.Loader',
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'django.template.loaders.app_directories.Loader',
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)),
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)
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)
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class PriorityCacheLoader(TestCase):
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def test_basic(self):
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"""
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Check that the order of template loader works. Refs #21460.
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"""
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t1, name = loader.find_template('priority/foo.html')
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self.assertEqual(t1.render(Context({})), 'priority\n')
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@override_settings(
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TEMPLATE_LOADERS=('django.template.loaders.filesystem.Loader',
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'django.template.loaders.app_directories.Loader',),
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)
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class PriorityLoader(TestCase):
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def test_basic(self):
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"""
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Check that the order of template loader works. Refs #21460.
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"""
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t1, name = loader.find_template('priority/foo.html')
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self.assertEqual(t1.render(Context({})), 'priority\n')
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