text: from __future__ import unicode_literals
  
  import mimetypes
  from os import path
  import unittest
  
  from django.conf.urls.static import static
  from django.http import HttpResponseNotModified
  from django.test import TestCase
  from django.test.utils import override_settings
  from django.utils.http import http_date
  from django.views.static import was_modified_since
  
  from .. import urls
  from ..urls import media_dir
  
  
  @override_settings(DEBUG=True)
  class StaticTests(TestCase):
      """Tests django views in django/views/static.py"""
  
      prefix = 'site_media'
  
      def test_serve(self):
          "The static view can serve static media"
          media_files = ['file.txt', 'file.txt.gz']
          for filename in media_files:
              response = self.client.get('/views/%s/%s' % (self.prefix, filename))
              response_content = b''.join(response)
              file_path = path.join(media_dir, filename)
              with open(file_path, 'rb') as fp:
                  self.assertEqual(fp.read(), response_content)
              self.assertEqual(len(response_content), int(response['Content-Length']))
              self.assertEqual(mimetypes.guess_type(file_path)[1], response.get('Content-Encoding', None))
  
      def test_unknown_mime_type(self):
          response = self.client.get('/views/%s/file.unknown' % self.prefix)
          self.assertEqual('application/octet-stream', response['Content-Type'])
  
      def test_copes_with_empty_path_component(self):
          file_name = 'file.txt'
          response = self.client.get('/views/%s//%s' % (self.prefix, file_name))
          response_content = b''.join(response)
          with open(path.join(media_dir, file_name), 'rb') as fp:
              self.assertEqual(fp.read(), response_content)
  
      def test_is_modified_since(self):
          file_name = 'file.txt'
          response = self.client.get('/views/%s/%s' % (self.prefix, file_name),
              HTTP_IF_MODIFIED_SINCE='Thu, 1 Jan 1970 00:00:00 GMT')
          response_content = b''.join(response)
          with open(path.join(media_dir, file_name), 'rb') as fp:
              self.assertEqual(fp.read(), response_content)
  
      def test_not_modified_since(self):
          file_name = 'file.txt'
          response = self.client.get(
              '/views/%s/%s' % (self.prefix, file_name),
              HTTP_IF_MODIFIED_SINCE='Mon, 18 Jan 2038 05:14:07 GMT'
              # This is 24h before max Unix time. Remember to fix Django and
              # update this test well before 2038 :)
              )
          self.assertIsInstance(response, HttpResponseNotModified)
  
      def test_invalid_if_modified_since(self):
          """Handle bogus If-Modified-Since values gracefully
  
          Assume that a file is modified since an invalid timestamp as per RFC
          2616, section 14.25.
          """
          file_name = 'file.txt'
          invalid_date = 'Mon, 28 May 999999999999 28:25:26 GMT'
          response = self.client.get('/views/%s/%s' % (self.prefix, file_name),
                                     HTTP_IF_MODIFIED_SINCE=invalid_date)
          response_content = b''.join(response)
          with open(path.join(media_dir, file_name), 'rb') as fp:
              self.assertEqual(fp.read(), response_content)
          self.assertEqual(len(response_content),
                            int(response['Content-Length']))
  
      def test_invalid_if_modified_since2(self):
          """Handle even more bogus If-Modified-Since values gracefully
  
          Assume that a file is modified since an invalid timestamp as per RFC
          2616, section 14.25.
          """
          file_name = 'file.txt'
          invalid_date = ': 1291108438, Wed, 20 Oct 2010 14:05:00 GMT'
          response = self.client.get('/views/%s/%s' % (self.prefix, file_name),
                                     HTTP_IF_MODIFIED_SINCE=invalid_date)
          response_content = b''.join(response)
          with open(path.join(media_dir, file_name), 'rb') as fp:
              self.assertEqual(fp.read(), response_content)
          self.assertEqual(len(response_content),
                            int(response['Content-Length']))
  
  
  class StaticHelperTest(StaticTests):
      """
      Test case to make sure the static URL pattern helper works as expected
      """
      def setUp(self):
          super(StaticHelperTest, self).setUp()
          self._old_views_urlpatterns = urls.urlpatterns[:]
          urls.urlpatterns += static('/media/', document_root=media_dir)
  
      def tearDown(self):
          super(StaticHelperTest, self).tearDown()
          urls.urlpatterns = self._old_views_urlpatterns
  
  
  class StaticUtilsTests(unittest.TestCase):
      def test_was_modified_since_fp(self):
          """
          Test that a floating point mtime does not disturb was_modified_since.
          (#18675)
          """
          mtime = 1343416141.107817
          header = http_date(mtime)
          self.assertFalse(was_modified_since(header, mtime))
  