Deciding best connection to schedule requests on based on cwnd and idle time (Reopened after revert)

net/http/http_network_transaction_unittest.cc

 // Copyright (c) 2011 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.
 
 #include "net/http/http_network_transaction.h"
 
 #include <math.h>  // ceil
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/file_path.h"
 #include "base/file_util.h"
 #include "base/memory/scoped_ptr.h"
+#include "base/metrics/histogram.h"
 #include "base/utf_string_conversions.h"
 #include "net/base/auth.h"
 #include "net/base/capturing_net_log.h"
 #include "net/base/completion_callback.h"
 #include "net/base/mock_host_resolver.h"
 #include "net/base/net_log.h"
 #include "net/base/net_log_unittest.h"
 #include "net/base/request_priority.h"
 #include "net/base/ssl_cert_request_info.h"
 #include "net/base/ssl_config_service_defaults.h"
@@ skipping 301 matching lines @@
 //-----------------------------------------------------------------------------
 
 // This is the expected list of advertised protocols from the browser's NPN
 // list.
 static const char kExpectedNPNString[] = "\x08http/1.1\x06spdy/2";
 
 // This is the expected return from a current server advertising SPDY.
 static const char kAlternateProtocolHttpHeader[] =
     "Alternate-Protocol: 443:npn-spdy/2\r\n\r\n";
 
+TEST_F(HttpNetworkTransactionTest, LogNumRttVsBytesMetrics_WarmestSocket) {
+  MockRead data_reads[1000];
+  data_reads[0] = MockRead("HTTP/1.0 200 OK\r\n\r\n");
+  for (int i = 1; i < 999; i++) {
+    data_reads[i] = MockRead("Gagan is a good boy!");
+  }
+  data_reads[999] = MockRead(false, OK);
+
+  net::SetSocketReusePolicy(0);
+  SimpleGetHelperResult out = SimpleGetHelper(data_reads,
+                                              arraysize(data_reads));
+
+  base::Histogram* histogram = NULL;
+  base::StatisticsRecorder::FindHistogram(
+      "Net.Num_RTT_vs_KB_warmest_socket_15KB", &histogram);
+  CHECK(histogram);
+
+  base::Histogram::SampleSet sample_set;
+  histogram->SnapshotSample(&sample_set);
+  EXPECT_EQ(1, sample_set.TotalCount());
+
+  EXPECT_EQ(OK, out.rv);
+  EXPECT_EQ("HTTP/1.0 200 OK", out.status_line);
+}
+
+// TODO(gagansingh): Add test for LogNumRttVsBytesMetrics_LastAccessSocket once
+// it is possible to clear histograms from previous tests.
+
 TEST_F(HttpNetworkTransactionTest, Basic) {
   SessionDependencies session_deps;
   scoped_ptr<HttpTransaction> trans(
       new HttpNetworkTransaction(CreateSession(&session_deps)));
 }
 
 TEST_F(HttpNetworkTransactionTest, SimpleGET) {
   MockRead data_reads[] = {
     MockRead("HTTP/1.0 200 OK\r\n\r\n"),
     MockRead("hello world"),
@@ skipping 8322 matching lines @@
     // Now that the new handshake has failed, ensure that the client
     // certificate was removed from the client auth cache.
     ASSERT_FALSE(session->ssl_client_auth_cache()->Lookup("proxy:70",
                                                           &client_cert));
     ASSERT_FALSE(session->ssl_client_auth_cache()->Lookup("www.example.com:443",
                                                           &client_cert));
   }
 }
 
 }  // namespace net