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from pathlib import Path
from template_tests.test_response import test_processor_name
from django.template import Context, EngineHandler, RequestContext
from django.template.backends.django import DjangoTemplates
from django.template.library import InvalidTemplateLibrary
from django.test import RequestFactory, override_settings
from .test_dummy import TemplateStringsTests
class DjangoTemplatesTests(TemplateStringsTests):
engine_class = DjangoTemplates
backend_name = 'django'
request_factory = RequestFactory()
def test_context_has_priority_over_template_context_processors(self):
# See ticket #23789.
engine = DjangoTemplates({
'DIRS': [],
'APP_DIRS': False,
'NAME': 'django',
'OPTIONS': {
'context_processors': [test_processor_name],
},
})
template = engine.from_string('{{ processors }}')
request = self.request_factory.get('/')
# Context processors run
content = template.render({}, request)
self.assertEqual(content, 'yes')
# Context overrides context processors
content = template.render({'processors': 'no'}, request)
self.assertEqual(content, 'no')
def test_render_requires_dict(self):
"""django.Template.render() requires a dict."""
engine = DjangoTemplates({
'DIRS': [],
'APP_DIRS': False,
'NAME': 'django',
'OPTIONS': {},
})
template = engine.from_string('')
context = Context()
request_context = RequestContext(self.request_factory.get('/'), {})
msg = 'context must be a dict rather than Context.'
with self.assertRaisesMessage(TypeError, msg):
template.render(context)
msg = 'context must be a dict rather than RequestContext.'
with self.assertRaisesMessage(TypeError, msg):
template.render(request_context)
@override_settings(INSTALLED_APPS=['template_backends.apps.good'])
def test_templatetag_discovery(self):
engine = DjangoTemplates({
'DIRS': [],
'APP_DIRS': False,
'NAME': 'django',
'OPTIONS': {
'libraries': {
'alternate': 'template_backends.apps.good.templatetags.good_tags',
'override': 'template_backends.apps.good.templatetags.good_tags',
},
},
})
# libraries are discovered from installed applications
self.assertEqual(
engine.engine.libraries['good_tags'],
'template_backends.apps.good.templatetags.good_tags',
)
self.assertEqual(
engine.engine.libraries['subpackage.tags'],
'template_backends.apps.good.templatetags.subpackage.tags',
)
# libraries are discovered from django.templatetags
self.assertEqual(
engine.engine.libraries['static'],
'django.templatetags.static',
)
# libraries passed in OPTIONS are registered
self.assertEqual(
engine.engine.libraries['alternate'],
'template_backends.apps.good.templatetags.good_tags',
)
# libraries passed in OPTIONS take precedence over discovered ones
self.assertEqual(
engine.engine.libraries['override'],
'template_backends.apps.good.templatetags.good_tags',
)
@override_settings(INSTALLED_APPS=['template_backends.apps.importerror'])
def test_templatetag_discovery_import_error(self):
"""
Import errors in tag modules should be reraised with a helpful message.
"""
with self.assertRaisesMessage(
InvalidTemplateLibrary,
"ImportError raised when trying to load "
"'template_backends.apps.importerror.templatetags.broken_tags'"
) as cm:
DjangoTemplates({
'DIRS': [],
'APP_DIRS': False,
'NAME': 'django',
'OPTIONS': {},
})
self.assertIsInstance(cm.exception.__cause__, ImportError)
def test_builtins_discovery(self):
engine = DjangoTemplates({
'DIRS': [],
'APP_DIRS': False,
'NAME': 'django',
'OPTIONS': {
'builtins': ['template_backends.apps.good.templatetags.good_tags'],
},
})
self.assertEqual(
engine.engine.builtins, [
'django.template.defaulttags',
'django.template.defaultfilters',
'django.template.loader_tags',
'template_backends.apps.good.templatetags.good_tags',
]
)
def test_autoescape_off(self):
templates = [{
'BACKEND': 'django.template.backends.django.DjangoTemplates',
'OPTIONS': {'autoescape': False},
}]
engines = EngineHandler(templates=templates)
self.assertEqual(
engines['django'].from_string('Hello, {{ name }}').render({'name': 'Bob & Jim'}),
'Hello, Bob & Jim'
)
def test_autoescape_default(self):
templates = [{
'BACKEND': 'django.template.backends.django.DjangoTemplates',
}]
engines = EngineHandler(templates=templates)
self.assertEqual(
engines['django'].from_string('Hello, {{ name }}').render({'name': 'Bob & Jim'}),
'Hello, Bob & Jim'
)
default_loaders = [
'django.template.loaders.filesystem.Loader',
'django.template.loaders.app_directories.Loader',
]
@override_settings(DEBUG=False)
def test_non_debug_default_template_loaders(self):
engine = DjangoTemplates({'DIRS': [], 'APP_DIRS': True, 'NAME': 'django', 'OPTIONS': {}})
self.assertEqual(engine.engine.loaders, [('django.template.loaders.cached.Loader', self.default_loaders)])
@override_settings(DEBUG=True)
def test_debug_default_template_loaders(self):
engine = DjangoTemplates({'DIRS': [], 'APP_DIRS': True, 'NAME': 'django', 'OPTIONS': {}})
self.assertEqual(engine.engine.loaders, self.default_loaders)
def test_dirs_pathlib(self):
engine = DjangoTemplates({
'DIRS': [Path(__file__).parent / 'templates' / 'template_backends'],
'APP_DIRS': False,
'NAME': 'django',
'OPTIONS': {},
})
template = engine.get_template('hello.html')
self.assertEqual(template.render({'name': 'Joe'}), 'Hello Joe!\n')
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