233 lines
8.7 KiB
Python
233 lines
8.7 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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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.engine import Engine
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from django.template import loader
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from django.test import SimpleTestCase, override_settings
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from django.test.utils import IgnorePendingDeprecationWarningsMixin
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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(SimpleTestCase):
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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 os.path.normcase(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(Engine.get_default())
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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(Engine.get_default())
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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(Engine.get_default())
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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(Engine.get_default())
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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(SimpleTestCase):
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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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# Retrieve 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 = Engine.get_default().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(SimpleTestCase):
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def test_basic(self):
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self.assertEqual(loader.render_to_string('test_context.html'), 'obj:\n')
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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\n')
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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\n')
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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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def test_no_empty_dict_pushed_to_stack(self):
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"""
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No empty dict should be pushed to the context stack when render_to_string
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is called without any argument (#21741).
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"""
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# The stack should have a length of 1, corresponding to the builtins
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self.assertEqual('1',
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loader.render_to_string('test_context_stack.html').strip())
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self.assertEqual('1',
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loader.render_to_string('test_context_stack.html', context_instance=Context()).strip())
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class TemplateDirsOverrideTest(IgnorePendingDeprecationWarningsMixin, 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(SimpleTestCase):
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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(SimpleTestCase):
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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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