Adding a pid= Chrome-Proxy smoke test

tools/chrome_proxy/webdriver/smoke.py

Index: tools/chrome_proxy/webdriver/smoke.py
diff --git a/tools/chrome_proxy/webdriver/smoke.py b/tools/chrome_proxy/webdriver/smoke.py
index ad799d649de81e396195aa8c3ddca731594c7f18..c8c6f3b931efd0a82c29ce16e816535133b8193e 100644
--- a/tools/chrome_proxy/webdriver/smoke.py
+++ b/tools/chrome_proxy/webdriver/smoke.py
@@ -65,6 +65,34 @@ class Smoke(IntegrationTest):
         self.assertHasChromeProxyViaHeader(response)
         self.assertEqual(200, response.status)
 
+  # Verify unique page IDs are sent in the Chrome-Proxy header.
+  def testPageID(self):
+    with TestDriver() as t:
+      t.AddChromeArg('--enable-spdy-proxy-auth')
+      page_identifiers = []
+      page_loads = 5
+
+      for i in range (0, page_loads):
+        t.LoadURL('http://check.googlezip.net/test.html')
+        responses = t.GetHTTPResponses()
+        self.assertEqual(2, len(responses))
+        pid_in_page_count = 0
+        page_id = ''
+        for response in responses:
+          chrome_proxy_header = response.request_headers['chrome-proxy']
+          chrome_proxy_directives = chrome_proxy_header.split(',')
+          for directive in chrome_proxy_directives:
+            if 'pid=' in directive:
+              pid_in_page_count = pid_in_page_count+1
+              page_id = directive.split('=')[1]
+              self.assertNotEqual('', page_id)
+              self.assertNotIn(page_id, page_identifiers)
+          self.assertHasChromeProxyViaHeader(response)
+          self.assertEqual(200, response.status)
+        page_identifiers.append(page_id)
+        self.assertEqual(1, pid_in_page_count)
+      self.assertEqual(page_loads, len(page_identifiers))

[tbansal1, 2017/05/01 22:32:13]

Is it possible that only this assert fails without anything else failing in the
test? It seems like this is essentially checking if the for loop ran as many
times as it was supposed to?

+
   # Ensure that block causes resources to load from the origin directly.
   def testCheckBlockIsWorking(self):
     with TestDriver() as t: