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317 lines
9.7 KiB
Python
317 lines
9.7 KiB
Python
from functools import wraps, update_wrapper
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from unittest import TestCase
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import warnings
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from django.contrib.admin.views.decorators import staff_member_required
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from django.contrib.auth.decorators import login_required, permission_required, user_passes_test
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from django.http import HttpResponse, HttpRequest, HttpResponseNotAllowed
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from django.middleware.clickjacking import XFrameOptionsMiddleware
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from django.utils.decorators import method_decorator
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from django.utils.functional import allow_lazy, lazy, memoize
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from django.views.decorators.cache import cache_page, never_cache, cache_control
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from django.views.decorators.clickjacking import xframe_options_deny, xframe_options_sameorigin, xframe_options_exempt
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from django.views.decorators.http import require_http_methods, require_GET, require_POST, require_safe, condition
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from django.views.decorators.vary import vary_on_headers, vary_on_cookie
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def fully_decorated(request):
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"""Expected __doc__"""
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return HttpResponse('<html><body>dummy</body></html>')
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fully_decorated.anything = "Expected __dict__"
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def compose(*functions):
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# compose(f, g)(*args, **kwargs) == f(g(*args, **kwargs))
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functions = list(reversed(functions))
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def _inner(*args, **kwargs):
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result = functions[0](*args, **kwargs)
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for f in functions[1:]:
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result = f(result)
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return result
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return _inner
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full_decorator = compose(
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# django.views.decorators.http
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require_http_methods(["GET"]),
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require_GET,
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require_POST,
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require_safe,
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condition(lambda r: None, lambda r: None),
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# django.views.decorators.vary
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vary_on_headers('Accept-language'),
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vary_on_cookie,
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# django.views.decorators.cache
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cache_page(60 * 15),
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cache_control(private=True),
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never_cache,
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# django.contrib.auth.decorators
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# Apply user_passes_test twice to check #9474
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user_passes_test(lambda u: True),
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login_required,
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permission_required('change_world'),
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# django.contrib.admin.views.decorators
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staff_member_required,
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# django.utils.functional
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allow_lazy,
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lazy,
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)
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# suppress the deprecation warning of memoize
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with warnings.catch_warnings():
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warnings.filterwarnings('ignore')
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fully_decorated = memoize(fully_decorated, {}, 1)
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fully_decorated = full_decorator(fully_decorated)
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class DecoratorsTest(TestCase):
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def test_attributes(self):
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"""
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Tests that django decorators set certain attributes of the wrapped
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function.
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"""
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self.assertEqual(fully_decorated.__name__, 'fully_decorated')
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self.assertEqual(fully_decorated.__doc__, 'Expected __doc__')
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self.assertEqual(fully_decorated.__dict__['anything'], 'Expected __dict__')
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def test_user_passes_test_composition(self):
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"""
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Test that the user_passes_test decorator can be applied multiple times
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(#9474).
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"""
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def test1(user):
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user.decorators_applied.append('test1')
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return True
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def test2(user):
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user.decorators_applied.append('test2')
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return True
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def callback(request):
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return request.user.decorators_applied
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callback = user_passes_test(test1)(callback)
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callback = user_passes_test(test2)(callback)
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class DummyUser(object):
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pass
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class DummyRequest(object):
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pass
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request = DummyRequest()
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request.user = DummyUser()
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request.user.decorators_applied = []
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response = callback(request)
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self.assertEqual(response, ['test2', 'test1'])
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def test_cache_page_new_style(self):
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"""
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Test that we can call cache_page the new way
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"""
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def my_view(request):
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return "response"
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my_view_cached = cache_page(123)(my_view)
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self.assertEqual(my_view_cached(HttpRequest()), "response")
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my_view_cached2 = cache_page(123, key_prefix="test")(my_view)
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self.assertEqual(my_view_cached2(HttpRequest()), "response")
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def test_require_safe_accepts_only_safe_methods(self):
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"""
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Test for the require_safe decorator.
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A view returns either a response or an exception.
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Refs #15637.
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"""
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def my_view(request):
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return HttpResponse("OK")
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my_safe_view = require_safe(my_view)
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request = HttpRequest()
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request.method = 'GET'
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self.assertIsInstance(my_safe_view(request), HttpResponse)
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request.method = 'HEAD'
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self.assertIsInstance(my_safe_view(request), HttpResponse)
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request.method = 'POST'
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self.assertIsInstance(my_safe_view(request), HttpResponseNotAllowed)
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request.method = 'PUT'
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self.assertIsInstance(my_safe_view(request), HttpResponseNotAllowed)
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request.method = 'DELETE'
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self.assertIsInstance(my_safe_view(request), HttpResponseNotAllowed)
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# For testing method_decorator, a decorator that assumes a single argument.
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# We will get type arguments if there is a mismatch in the number of arguments.
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def simple_dec(func):
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def wrapper(arg):
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return func("test:" + arg)
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return wraps(func)(wrapper)
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simple_dec_m = method_decorator(simple_dec)
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# For testing method_decorator, two decorators that add an attribute to the function
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def myattr_dec(func):
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def wrapper(*args, **kwargs):
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return func(*args, **kwargs)
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wrapper.myattr = True
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return wraps(func)(wrapper)
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myattr_dec_m = method_decorator(myattr_dec)
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def myattr2_dec(func):
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def wrapper(*args, **kwargs):
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return func(*args, **kwargs)
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wrapper.myattr2 = True
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return wraps(func)(wrapper)
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myattr2_dec_m = method_decorator(myattr2_dec)
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class ClsDec(object):
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def __init__(self, myattr):
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self.myattr = myattr
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def __call__(self, f):
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def wrapped():
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return f() and self.myattr
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return update_wrapper(wrapped, f)
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class MethodDecoratorTests(TestCase):
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"""
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Tests for method_decorator
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"""
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def test_preserve_signature(self):
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class Test(object):
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@simple_dec_m
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def say(self, arg):
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return arg
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self.assertEqual("test:hello", Test().say("hello"))
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def test_preserve_attributes(self):
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# Sanity check myattr_dec and myattr2_dec
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@myattr_dec
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@myattr2_dec
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def func():
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pass
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self.assertEqual(getattr(func, 'myattr', False), True)
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self.assertEqual(getattr(func, 'myattr2', False), True)
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# Now check method_decorator
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class Test(object):
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@myattr_dec_m
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@myattr2_dec_m
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def method(self):
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"A method"
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pass
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self.assertEqual(getattr(Test().method, 'myattr', False), True)
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self.assertEqual(getattr(Test().method, 'myattr2', False), True)
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self.assertEqual(getattr(Test.method, 'myattr', False), True)
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self.assertEqual(getattr(Test.method, 'myattr2', False), True)
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self.assertEqual(Test.method.__doc__, 'A method')
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self.assertEqual(Test.method.__name__, 'method')
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# Test for argumented decorator
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def test_argumented(self):
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class Test(object):
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@method_decorator(ClsDec(False))
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def method(self):
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return True
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self.assertEqual(Test().method(), False)
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def test_descriptors(self):
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def original_dec(wrapped):
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def _wrapped(arg):
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return wrapped(arg)
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return _wrapped
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method_dec = method_decorator(original_dec)
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class bound_wrapper(object):
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def __init__(self, wrapped):
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self.wrapped = wrapped
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self.__name__ = wrapped.__name__
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def __call__(self, arg):
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return self.wrapped(arg)
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def __get__(self, instance, owner):
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return self
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class descriptor_wrapper(object):
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def __init__(self, wrapped):
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self.wrapped = wrapped
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self.__name__ = wrapped.__name__
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def __get__(self, instance, owner):
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return bound_wrapper(self.wrapped.__get__(instance, owner))
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class Test(object):
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@method_dec
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@descriptor_wrapper
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def method(self, arg):
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return arg
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self.assertEqual(Test().method(1), 1)
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class XFrameOptionsDecoratorsTests(TestCase):
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"""
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Tests for the X-Frame-Options decorators.
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"""
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def test_deny_decorator(self):
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"""
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Ensures @xframe_options_deny properly sets the X-Frame-Options header.
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"""
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@xframe_options_deny
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def a_view(request):
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return HttpResponse()
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r = a_view(HttpRequest())
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self.assertEqual(r['X-Frame-Options'], 'DENY')
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def test_sameorigin_decorator(self):
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"""
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Ensures @xframe_options_sameorigin properly sets the X-Frame-Options
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header.
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"""
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@xframe_options_sameorigin
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def a_view(request):
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return HttpResponse()
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r = a_view(HttpRequest())
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self.assertEqual(r['X-Frame-Options'], 'SAMEORIGIN')
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def test_exempt_decorator(self):
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"""
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Ensures @xframe_options_exempt properly instructs the
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XFrameOptionsMiddleware to NOT set the header.
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"""
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@xframe_options_exempt
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def a_view(request):
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return HttpResponse()
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req = HttpRequest()
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resp = a_view(req)
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self.assertEqual(resp.get('X-Frame-Options', None), None)
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self.assertTrue(resp.xframe_options_exempt)
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# Since the real purpose of the exempt decorator is to suppress
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# the middleware's functionality, let's make sure it actually works...
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r = XFrameOptionsMiddleware().process_response(req, resp)
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self.assertEqual(r.get('X-Frame-Options', None), None)
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