from __future__ import unicode_literals import os import pickle import time from datetime import datetime from django.conf import settings from django.template import Context, engines from django.template.response import ( ContentNotRenderedError, SimpleTemplateResponse, TemplateResponse, ) from django.test import ( RequestFactory, SimpleTestCase, ignore_warnings, override_settings, ) from django.test.utils import require_jinja2 from django.utils._os import upath from django.utils.deprecation import RemovedInDjango20Warning def test_processor(request): return {'processors': 'yes'} test_processor_name = 'template_tests.test_response.test_processor' # A test middleware that installs a temporary URLConf class CustomURLConfMiddleware(object): def process_request(self, request): request.urlconf = 'template_tests.alternate_urls' class SimpleTemplateResponseTest(SimpleTestCase): def _response(self, template='foo', *args, **kwargs): template = engines['django'].from_string(template) return SimpleTemplateResponse(template, *args, **kwargs) def test_template_resolving(self): response = SimpleTemplateResponse('first/test.html') response.render() self.assertEqual(response.content, b'First template\n') templates = ['foo.html', 'second/test.html', 'first/test.html'] response = SimpleTemplateResponse(templates) response.render() self.assertEqual(response.content, b'Second template\n') response = self._response() response.render() self.assertEqual(response.content, b'foo') def test_explicit_baking(self): # explicit baking response = self._response() self.assertFalse(response.is_rendered) response.render() self.assertTrue(response.is_rendered) def test_render(self): # response is not re-rendered without the render call response = self._response().render() self.assertEqual(response.content, b'foo') # rebaking doesn't change the rendered content template = engines['django'].from_string('bar{{ baz }}') response.template_name = template response.render() self.assertEqual(response.content, b'foo') # but rendered content can be overridden by manually # setting content response.content = 'bar' self.assertEqual(response.content, b'bar') def test_iteration_unrendered(self): # unrendered response raises an exception on iteration response = self._response() self.assertFalse(response.is_rendered) def iteration(): for x in response: pass self.assertRaises(ContentNotRenderedError, iteration) self.assertFalse(response.is_rendered) def test_iteration_rendered(self): # iteration works for rendered responses response = self._response().render() res = [x for x in response] self.assertEqual(res, [b'foo']) def test_content_access_unrendered(self): # unrendered response raises an exception when content is accessed response = self._response() self.assertFalse(response.is_rendered) self.assertRaises(ContentNotRenderedError, lambda: response.content) self.assertFalse(response.is_rendered) def test_content_access_rendered(self): # rendered response content can be accessed response = self._response().render() self.assertEqual(response.content, b'foo') def test_set_content(self): # content can be overridden response = self._response() self.assertFalse(response.is_rendered) response.content = 'spam' self.assertTrue(response.is_rendered) self.assertEqual(response.content, b'spam') response.content = 'baz' self.assertEqual(response.content, b'baz') def test_dict_context(self): response = self._response('{{ foo }}{{ processors }}', {'foo': 'bar'}) self.assertEqual(response.context_data, {'foo': 'bar'}) response.render() self.assertEqual(response.content, b'bar') @ignore_warnings(category=RemovedInDjango20Warning) def test_context_instance(self): response = self._response('{{ foo }}{{ processors }}', Context({'foo': 'bar'})) self.assertEqual(response.context_data.__class__, Context) response.render() self.assertEqual(response.content, b'bar') def test_kwargs(self): response = self._response(content_type='application/json', status=504) self.assertEqual(response['content-type'], 'application/json') self.assertEqual(response.status_code, 504) def test_args(self): response = SimpleTemplateResponse('', {}, 'application/json', 504) self.assertEqual(response['content-type'], 'application/json') self.assertEqual(response.status_code, 504) @require_jinja2 def test_using(self): response = SimpleTemplateResponse('template_tests/using.html').render() self.assertEqual(response.content, b'DTL\n') response = SimpleTemplateResponse('template_tests/using.html', using='django').render() self.assertEqual(response.content, b'DTL\n') response = SimpleTemplateResponse('template_tests/using.html', using='jinja2').render() self.assertEqual(response.content, b'Jinja2\n') def test_post_callbacks(self): "Rendering a template response triggers the post-render callbacks" post = [] def post1(obj): post.append('post1') def post2(obj): post.append('post2') response = SimpleTemplateResponse('first/test.html', {}) response.add_post_render_callback(post1) response.add_post_render_callback(post2) # When the content is rendered, all the callbacks are invoked, too. response.render() self.assertEqual(response.content, b'First template\n') self.assertEqual(post, ['post1', 'post2']) def test_pickling(self): # Create a template response. The context is # known to be unpickleable (e.g., a function). response = SimpleTemplateResponse('first/test.html', { 'value': 123, 'fn': datetime.now, }) self.assertRaises(ContentNotRenderedError, pickle.dumps, response) # But if we render the response, we can pickle it. response.render() pickled_response = pickle.dumps(response) unpickled_response = pickle.loads(pickled_response) self.assertEqual(unpickled_response.content, response.content) self.assertEqual(unpickled_response['content-type'], response['content-type']) self.assertEqual(unpickled_response.status_code, response.status_code) # ...and the unpickled response doesn't have the # template-related attributes, so it can't be re-rendered template_attrs = ('template_name', 'context_data', '_post_render_callbacks') for attr in template_attrs: self.assertFalse(hasattr(unpickled_response, attr)) # ...and requesting any of those attributes raises an exception for attr in template_attrs: with self.assertRaises(AttributeError): getattr(unpickled_response, attr) def test_repickling(self): response = SimpleTemplateResponse('first/test.html', { 'value': 123, 'fn': datetime.now, }) self.assertRaises(ContentNotRenderedError, pickle.dumps, response) response.render() pickled_response = pickle.dumps(response) unpickled_response = pickle.loads(pickled_response) pickle.dumps(unpickled_response) def test_pickling_cookie(self): response = SimpleTemplateResponse('first/test.html', { 'value': 123, 'fn': datetime.now, }) response.cookies['key'] = 'value' response.render() pickled_response = pickle.dumps(response, pickle.HIGHEST_PROTOCOL) unpickled_response = pickle.loads(pickled_response) self.assertEqual(unpickled_response.cookies['key'].value, 'value') @override_settings(TEMPLATES=[{ 'BACKEND': 'django.template.backends.django.DjangoTemplates', 'DIRS': [os.path.join(os.path.dirname(upath(__file__)), 'templates')], 'OPTIONS': { 'context_processors': [test_processor_name], }, }]) class TemplateResponseTest(SimpleTestCase): def setUp(self): self.factory = RequestFactory() def _response(self, template='foo', *args, **kwargs): self._request = self.factory.get('/') template = engines['django'].from_string(template) return TemplateResponse(self._request, template, *args, **kwargs) def test_render(self): response = self._response('{{ foo }}{{ processors }}').render() self.assertEqual(response.content, b'yes') def test_render_with_requestcontext(self): response = self._response('{{ foo }}{{ processors }}', {'foo': 'bar'}).render() self.assertEqual(response.content, b'baryes') @ignore_warnings(category=RemovedInDjango20Warning) def test_render_with_context(self): response = self._response('{{ foo }}{{ processors }}', Context({'foo': 'bar'})).render() self.assertEqual(response.content, b'bar') def test_context_processor_priority(self): # context processors should be overridden by passed-in context response = self._response('{{ foo }}{{ processors }}', {'processors': 'no'}).render() self.assertEqual(response.content, b'no') def test_kwargs(self): response = self._response(content_type='application/json', status=504) self.assertEqual(response['content-type'], 'application/json') self.assertEqual(response.status_code, 504) def test_args(self): response = TemplateResponse(self.factory.get('/'), '', {}, 'application/json', 504) self.assertEqual(response['content-type'], 'application/json') self.assertEqual(response.status_code, 504) @require_jinja2 def test_using(self): request = self.factory.get('/') response = TemplateResponse(request, 'template_tests/using.html').render() self.assertEqual(response.content, b'DTL\n') response = TemplateResponse(request, 'template_tests/using.html', using='django').render() self.assertEqual(response.content, b'DTL\n') response = TemplateResponse(request, 'template_tests/using.html', using='jinja2').render() self.assertEqual(response.content, b'Jinja2\n') @ignore_warnings(category=RemovedInDjango20Warning) def test_custom_app(self): self._response('{{ foo }}', current_app="foobar") self.assertEqual(self._request.current_app, 'foobar') def test_pickling(self): # Create a template response. The context is # known to be unpickleable (e.g., a function). response = TemplateResponse(self.factory.get('/'), 'first/test.html', { 'value': 123, 'fn': datetime.now, } ) self.assertRaises(ContentNotRenderedError, pickle.dumps, response) # But if we render the response, we can pickle it. response.render() pickled_response = pickle.dumps(response) unpickled_response = pickle.loads(pickled_response) self.assertEqual(unpickled_response.content, response.content) self.assertEqual(unpickled_response['content-type'], response['content-type']) self.assertEqual(unpickled_response.status_code, response.status_code) # ...and the unpickled response doesn't have the # template-related attributes, so it can't be re-rendered template_attrs = ('template_name', 'context_data', '_post_render_callbacks', '_request', '_current_app') for attr in template_attrs: self.assertFalse(hasattr(unpickled_response, attr)) # ...and requesting any of those attributes raises an exception for attr in template_attrs: with self.assertRaises(AttributeError): getattr(unpickled_response, attr) def test_repickling(self): response = SimpleTemplateResponse('first/test.html', { 'value': 123, 'fn': datetime.now, }) self.assertRaises(ContentNotRenderedError, pickle.dumps, response) response.render() pickled_response = pickle.dumps(response) unpickled_response = pickle.loads(pickled_response) pickle.dumps(unpickled_response) @override_settings( MIDDLEWARE_CLASSES=list(settings.MIDDLEWARE_CLASSES) + [ 'template_tests.test_response.CustomURLConfMiddleware' ], ROOT_URLCONF='template_tests.urls', ) class CustomURLConfTest(SimpleTestCase): def test_custom_urlconf(self): response = self.client.get('/template_response_view/') self.assertEqual(response.status_code, 200) self.assertContains(response, 'This is where you can find the snark: /snark/') @override_settings( CACHE_MIDDLEWARE_SECONDS=2.0, MIDDLEWARE_CLASSES=list(settings.MIDDLEWARE_CLASSES) + [ 'django.middleware.cache.FetchFromCacheMiddleware', 'django.middleware.cache.UpdateCacheMiddleware', ], ROOT_URLCONF='template_tests.alternate_urls', ) class CacheMiddlewareTest(SimpleTestCase): def test_middleware_caching(self): response = self.client.get('/template_response_view/') self.assertEqual(response.status_code, 200) time.sleep(1.0) response2 = self.client.get('/template_response_view/') self.assertEqual(response2.status_code, 200) self.assertEqual(response.content, response2.content) time.sleep(2.0) # Let the cache expire and test again response2 = self.client.get('/template_response_view/') self.assertEqual(response2.status_code, 200) self.assertNotEqual(response.content, response2.content)