Docs: Use ETags.

chrome/common/extensions/docs/server2/render_servlet_test.py

 #!/usr/bin/env python
 # Copyright 2013 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import unittest
 
 from extensions_paths import EXAMPLES, PUBLIC_TEMPLATES, STATIC_DOCS
 from local_file_system import LocalFileSystem
 from render_servlet import RenderServlet
 from server_instance import ServerInstance
 from servlet import Request, Response
 from test_util import ReadFile
 
 
 class _RenderServletDelegate(RenderServlet.Delegate):
   def CreateServerInstance(self):
     return ServerInstance.ForTest(LocalFileSystem.Create())
 
 
 class RenderServletTest(unittest.TestCase):
-  def _Render(self, path):
-    return RenderServlet(Request.ForTest(path),
+  def _Render(self, path, headers=None):
+    return RenderServlet(Request.ForTest(path, headers=headers),
                          _RenderServletDelegate()).Get()
 
   def testExtensionAppRedirect(self):
     self.assertEqual(
         Response.Redirect('/apps/storage', permanent=False),
         self._Render('storage'))
 
   def testChannelRedirect(self):
     for channel in ('stable', 'beta', 'dev', 'trunk'):
       self.assertEqual(
@@ skipping 69 matching lines @@
   def testOtherRedirectsJsonRedirect(self):
     response = self._Render('apps/webview_tag')
     self.assertEqual(('/apps/tags/webview', False),
                      response.GetRedirect())
 
   def testDirectories(self):
     # Directories should be redirected to a URL that doesn't end in a '/'
     # whether or not that exists.
     self.assertEqual(('/dir', False), self._Render('dir/').GetRedirect())
 
+  def testEtags(self):
+    def test_path(path, content_type):
+      # Render without etag.
+      response = self._Render(path)
+      self.assertEqual(200, response.status)
+      etag = response.headers.get('ETag')
+      self.assertTrue(etag is not None)
+
+      # Render with an If-None-Match which doesn't match.
+      response = self._Render(path, headers={
+        'If-None-Match': '"fake etag"',
+      })
+      self.assertEqual(200, response.status)
+      self.assertEqual(content_type, response.headers.get('Content-Type'))
+      self.assertEqual(etag, response.headers.get('ETag'))
+
+      # Render with the correct matching If-None-Match.
+      response = self._Render(path, headers={
+        'If-None-Match': etag,
+      })
+      self.assertEqual(304, response.status)
+      self.assertEqual('Not Modified', response.content.ToString())
+      self.assertEqual(content_type, response.headers.get('Content-Type'))
+      self.assertEqual(etag, response.headers.get('ETag'))
+
+    # Test with a static path and a dynamic path.
+    test_path('static/css/out/site.css', 'text/css; charset=utf-8')
+    test_path('extensions/storage', 'text/html; charset=utf-8')
+
 
 if __name__ == '__main__':
   unittest.main()