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from unittest import mock
from asgiref.sync import iscoroutinefunction
from django.http import HttpRequest, HttpResponse
from django.test import SimpleTestCase
from django.utils.decorators import method_decorator
from django.views.decorators.cache import cache_control, cache_page, never_cache
class HttpRequestProxy:
def __init__(self, request):
self._request = request
def __getattr__(self, attr):
"""Proxy to the underlying HttpRequest object."""
return getattr(self._request, attr)
class CacheControlDecoratorTest(SimpleTestCase):
def test_wrapped_sync_function_is_not_coroutine_function(self):
def sync_view(request):
return HttpResponse()
wrapped_view = cache_control()(sync_view)
self.assertIs(iscoroutinefunction(wrapped_view), False)
def test_wrapped_async_function_is_coroutine_function(self):
async def async_view(request):
return HttpResponse()
wrapped_view = cache_control()(async_view)
self.assertIs(iscoroutinefunction(wrapped_view), True)
def test_cache_control_decorator_http_request(self):
class MyClass:
@cache_control(a="b")
def a_view(self, request):
return HttpResponse()
msg = (
"cache_control didn't receive an HttpRequest. If you are "
"decorating a classmethod, be sure to use @method_decorator."
)
request = HttpRequest()
with self.assertRaisesMessage(TypeError, msg):
MyClass().a_view(request)
with self.assertRaisesMessage(TypeError, msg):
MyClass().a_view(HttpRequestProxy(request))
async def test_cache_control_decorator_http_request_async_view(self):
class MyClass:
@cache_control(a="b")
async def async_view(self, request):
return HttpResponse()
msg = (
"cache_control didn't receive an HttpRequest. If you are decorating a "
"classmethod, be sure to use @method_decorator."
)
request = HttpRequest()
with self.assertRaisesMessage(TypeError, msg):
await MyClass().async_view(request)
with self.assertRaisesMessage(TypeError, msg):
await MyClass().async_view(HttpRequestProxy(request))
def test_cache_control_decorator_http_request_proxy(self):
class MyClass:
@method_decorator(cache_control(a="b"))
def a_view(self, request):
return HttpResponse()
request = HttpRequest()
response = MyClass().a_view(HttpRequestProxy(request))
self.assertEqual(response.headers["Cache-Control"], "a=b")
def test_cache_control_empty_decorator(self):
@cache_control()
def a_view(request):
return HttpResponse()
response = a_view(HttpRequest())
self.assertEqual(response.get("Cache-Control"), "")
async def test_cache_control_empty_decorator_async_view(self):
@cache_control()
async def async_view(request):
return HttpResponse()
response = await async_view(HttpRequest())
self.assertEqual(response.get("Cache-Control"), "")
def test_cache_control_full_decorator(self):
@cache_control(max_age=123, private=True, public=True, custom=456)
def a_view(request):
return HttpResponse()
response = a_view(HttpRequest())
cache_control_items = response.get("Cache-Control").split(", ")
self.assertEqual(
set(cache_control_items), {"max-age=123", "private", "public", "custom=456"}
)
async def test_cache_control_full_decorator_async_view(self):
@cache_control(max_age=123, private=True, public=True, custom=456)
async def async_view(request):
return HttpResponse()
response = await async_view(HttpRequest())
cache_control_items = response.get("Cache-Control").split(", ")
self.assertEqual(
set(cache_control_items), {"max-age=123", "private", "public", "custom=456"}
)
class CachePageDecoratorTest(SimpleTestCase):
def test_cache_page(self):
def my_view(request):
return "response"
my_view_cached = cache_page(123)(my_view)
self.assertEqual(my_view_cached(HttpRequest()), "response")
my_view_cached2 = cache_page(123, key_prefix="test")(my_view)
self.assertEqual(my_view_cached2(HttpRequest()), "response")
class NeverCacheDecoratorTest(SimpleTestCase):
def test_wrapped_sync_function_is_not_coroutine_function(self):
def sync_view(request):
return HttpResponse()
wrapped_view = never_cache(sync_view)
self.assertIs(iscoroutinefunction(wrapped_view), False)
def test_wrapped_async_function_is_coroutine_function(self):
async def async_view(request):
return HttpResponse()
wrapped_view = never_cache(async_view)
self.assertIs(iscoroutinefunction(wrapped_view), True)
@mock.patch("time.time")
def test_never_cache_decorator_headers(self, mocked_time):
@never_cache
def a_view(request):
return HttpResponse()
mocked_time.return_value = 1167616461.0
response = a_view(HttpRequest())
self.assertEqual(
response.headers["Expires"],
"Mon, 01 Jan 2007 01:54:21 GMT",
)
self.assertEqual(
response.headers["Cache-Control"],
"max-age=0, no-cache, no-store, must-revalidate, private",
)
@mock.patch("time.time")
async def test_never_cache_decorator_headers_async_view(self, mocked_time):
@never_cache
async def async_view(request):
return HttpResponse()
mocked_time.return_value = 1167616461.0
response = await async_view(HttpRequest())
self.assertEqual(response.headers["Expires"], "Mon, 01 Jan 2007 01:54:21 GMT")
self.assertEqual(
response.headers["Cache-Control"],
"max-age=0, no-cache, no-store, must-revalidate, private",
)
def test_never_cache_decorator_expires_not_overridden(self):
@never_cache
def a_view(request):
return HttpResponse(headers={"Expires": "tomorrow"})
response = a_view(HttpRequest())
self.assertEqual(response.headers["Expires"], "tomorrow")
async def test_never_cache_decorator_expires_not_overridden_async_view(self):
@never_cache
async def async_view(request):
return HttpResponse(headers={"Expires": "tomorrow"})
response = await async_view(HttpRequest())
self.assertEqual(response.headers["Expires"], "tomorrow")
def test_never_cache_decorator_http_request(self):
class MyClass:
@never_cache
def a_view(self, request):
return HttpResponse()
request = HttpRequest()
msg = (
"never_cache didn't receive an HttpRequest. If you are decorating "
"a classmethod, be sure to use @method_decorator."
)
with self.assertRaisesMessage(TypeError, msg):
MyClass().a_view(request)
with self.assertRaisesMessage(TypeError, msg):
MyClass().a_view(HttpRequestProxy(request))
async def test_never_cache_decorator_http_request_async_view(self):
class MyClass:
@never_cache
async def async_view(self, request):
return HttpResponse()
request = HttpRequest()
msg = (
"never_cache didn't receive an HttpRequest. If you are decorating "
"a classmethod, be sure to use @method_decorator."
)
with self.assertRaisesMessage(TypeError, msg):
await MyClass().async_view(request)
with self.assertRaisesMessage(TypeError, msg):
await MyClass().async_view(HttpRequestProxy(request))
def test_never_cache_decorator_http_request_proxy(self):
class MyClass:
@method_decorator(never_cache)
def a_view(self, request):
return HttpResponse()
request = HttpRequest()
response = MyClass().a_view(HttpRequestProxy(request))
self.assertIn("Cache-Control", response.headers)
self.assertIn("Expires", response.headers)
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