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from django.http import HttpResponse
from django.template import engines
from django.template.response import TemplateResponse
from django.test import RequestFactory, SimpleTestCase
from django.utils.decorators import classproperty, decorator_from_middleware
class ProcessViewMiddleware(object):
def process_view(self, request, view_func, view_args, view_kwargs):
pass
process_view_dec = decorator_from_middleware(ProcessViewMiddleware)
@process_view_dec
def process_view(request):
return HttpResponse()
class ClassProcessView(object):
def __call__(self, request):
return HttpResponse()
class_process_view = process_view_dec(ClassProcessView())
class FullMiddleware(object):
def process_request(self, request):
request.process_request_reached = True
def process_view(self, request, view_func, view_args, view_kwargs):
request.process_view_reached = True
def process_template_response(self, request, response):
request.process_template_response_reached = True
return response
def process_response(self, request, response):
# This should never receive unrendered content.
request.process_response_content = response.content
request.process_response_reached = True
return response
full_dec = decorator_from_middleware(FullMiddleware)
class DecoratorFromMiddlewareTests(SimpleTestCase):
"""
Tests for view decorators created using
``django.utils.decorators.decorator_from_middleware``.
"""
rf = RequestFactory()
def test_process_view_middleware(self):
"""
Test a middleware that implements process_view.
"""
process_view(self.rf.get('/'))
def test_callable_process_view_middleware(self):
"""
Test a middleware that implements process_view, operating on a callable class.
"""
class_process_view(self.rf.get('/'))
def test_full_dec_normal(self):
"""
All methods of middleware are called for normal HttpResponses
"""
@full_dec
def normal_view(request):
template = engines['django'].from_string("Hello world")
return HttpResponse(template.render())
request = self.rf.get('/')
normal_view(request)
self.assertTrue(getattr(request, 'process_request_reached', False))
self.assertTrue(getattr(request, 'process_view_reached', False))
# process_template_response must not be called for HttpResponse
self.assertFalse(getattr(request, 'process_template_response_reached', False))
self.assertTrue(getattr(request, 'process_response_reached', False))
def test_full_dec_templateresponse(self):
"""
All methods of middleware are called for TemplateResponses in
the right sequence.
"""
@full_dec
def template_response_view(request):
template = engines['django'].from_string("Hello world")
return TemplateResponse(request, template)
request = self.rf.get('/')
response = template_response_view(request)
self.assertTrue(getattr(request, 'process_request_reached', False))
self.assertTrue(getattr(request, 'process_view_reached', False))
self.assertTrue(getattr(request, 'process_template_response_reached', False))
# response must not be rendered yet.
self.assertFalse(response._is_rendered)
# process_response must not be called until after response is rendered,
# otherwise some decorators like csrf_protect and gzip_page will not
# work correctly. See #16004
self.assertFalse(getattr(request, 'process_response_reached', False))
response.render()
self.assertTrue(getattr(request, 'process_response_reached', False))
# process_response saw the rendered content
self.assertEqual(request.process_response_content, b"Hello world")
class ClassPropertyTest(SimpleTestCase):
def test_getter(self):
class Foo(object):
foo_attr = 123
def __init__(self):
self.foo_attr = 456
@classproperty
def foo(cls):
return cls.foo_attr
class Bar(object):
bar = classproperty()
@bar.getter
def bar(cls):
return 123
self.assertEqual(Foo.foo, 123)
self.assertEqual(Foo().foo, 123)
self.assertEqual(Bar.bar, 123)
self.assertEqual(Bar().bar, 123)
def test_override_getter(self):
class Foo(object):
@classproperty
def foo(cls):
return 123
@foo.getter
def foo(cls):
return 456
self.assertEqual(Foo.foo, 456)
self.assertEqual(Foo().foo, 456)
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