Fast-fail WPAD detection.

net/dns/host_resolver_impl_unittest.cc

 // Copyright (c) 2012 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/dns/host_resolver_impl.h"
 
 #include <algorithm>
 #include <string>
 
 #include "base/bind.h"
@@ skipping 1545 matching lines @@
 
   proc_->SignalMultiple(requests_.size());
 
   for (size_t i = 0; i < 2; ++i)
     EXPECT_EQ(ERR_NAME_NOT_RESOLVED, requests_[i]->WaitForResult()) << i;
 
   for (size_t i = 2; i < requests_.size(); ++i)
     EXPECT_EQ(OK, requests_[i]->WaitForResult()) << i;
 }
 
+TEST_F(HostResolverImplDnsTest, SystemOnlyBypassesDnsTask) {
+  ChangeDnsConfig(CreateValidDnsConfig());
+
+  proc_->AddRuleForAllFamilies(std::string(), std::string());
+
+  HostResolver::RequestInfo info_bypass(HostPortPair("ok", 80));
+  info_bypass.set_host_resolver_flags(HOST_RESOLVER_SYSTEM_ONLY);
+  EXPECT_EQ(ERR_IO_PENDING, CreateRequest(info_bypass, MEDIUM)->Resolve());
+
+  HostResolver::RequestInfo info(HostPortPair("ok", 80));
+  EXPECT_EQ(ERR_IO_PENDING, CreateRequest(info, MEDIUM)->Resolve());
+
+  proc_->SignalMultiple(requests_.size());
+
+  EXPECT_EQ(ERR_NAME_NOT_RESOLVED, requests_[0]->WaitForResult());
+  EXPECT_EQ(OK, requests_[1]->WaitForResult());
+}
+
 TEST_F(HostResolverImplDnsTest, DisableDnsClientOnPersistentFailure) {
   ChangeDnsConfig(CreateValidDnsConfig());
 
   proc_->AddRuleForAllFamilies(std::string(),
                                std::string());  // Default to failures.
 
   // Check that DnsTask works.
   Request* req = CreateRequest("ok_1", 80);
   EXPECT_EQ(ERR_IO_PENDING, req->Resolve());
   EXPECT_EQ(OK, req->WaitForResult());
@@ skipping 453 matching lines @@
 
   EXPECT_EQ(OK, requests_[0]->WaitForResult());
   EXPECT_TRUE(requests_[0]->HasOneAddress("192.168.0.1", 80));
   EXPECT_EQ(OK, requests_[1]->WaitForResult());
   EXPECT_TRUE(requests_[1]->HasOneAddress("192.168.0.2", 80));
   EXPECT_EQ(OK, requests_[2]->WaitForResult());
   EXPECT_TRUE(requests_[2]->HasOneAddress("192.168.0.3", 80));
 }
 
 }  // namespace net