src/chrome/browser/net/predictor_browsertest.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "base/json/json_string_value_serializer.h"
   6 #include "base/prefs/pref_service.h"
   7 #include "chrome/browser/net/predictor.h"
   8 #include "chrome/browser/profiles/profile.h"
   9 #include "chrome/browser/ui/browser.h"
  10 #include "chrome/common/pref_names.h"
  11 #include "chrome/test/base/in_process_browser_test.h"
  12 #include "chrome/test/base/ui_test_utils.h"
  13 #include "net/base/net_errors.h"
  14 #include "net/dns/host_resolver_proc.h"
  15 #include "net/dns/mock_host_resolver.h"
  16 #include "testing/gmock/include/gmock/gmock.h"
  17
  18 using content::BrowserThread;
  19 using testing::HasSubstr;
  20
  21 namespace {
  22
  23 // Records a history of all hostnames for which resolving has been requested,
  24 // and immediately fails the resolution requests themselves.
  25 class HostResolutionRequestRecorder : public net::HostResolverProc {
  26  public:
  27   HostResolutionRequestRecorder()
  28       : HostResolverProc(NULL),
  29         is_waiting_for_hostname_(false) {
  30   }
  31
  32   virtual int Resolve(const std::string& host,
  33                       net::AddressFamily address_family,
  34                       net::HostResolverFlags host_resolver_flags,
  35                       net::AddressList* addrlist,
  36                       int* os_error) OVERRIDE {
  37     BrowserThread::PostTask(
  38         BrowserThread::UI,
  39         FROM_HERE,
  40         base::Bind(&HostResolutionRequestRecorder::AddToHistory,
  41                    base::Unretained(this),
  42                    host));
  43     return net::ERR_NAME_NOT_RESOLVED;
  44   }
  45
  46   bool HasHostBeenRequested(const std::string& hostname) {
  47     DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
  48     return std::find(requested_hostnames_.begin(),
  49                      requested_hostnames_.end(),
  50                      hostname) != requested_hostnames_.end();
  51   }
  52
  53   void WaitUntilHostHasBeenRequested(const std::string& hostname) {
  54     DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
  55     DCHECK(!is_waiting_for_hostname_);
  56     if (HasHostBeenRequested(hostname))
  57       return;
  58     waiting_for_hostname_ = hostname;
  59     is_waiting_for_hostname_ = true;
  60     content::RunMessageLoop();
  61   }
  62
  63  private:
  64   virtual ~HostResolutionRequestRecorder() {}
  65
  66   void AddToHistory(const std::string& hostname) {
  67     DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
  68     requested_hostnames_.push_back(hostname);
  69     if (is_waiting_for_hostname_ && waiting_for_hostname_ == hostname) {
  70       is_waiting_for_hostname_ = false;
  71       waiting_for_hostname_.clear();
  72       base::MessageLoop::current()->Quit();
  73     }
  74   }
  75
  76   // The hostname which WaitUntilHostHasBeenRequested is currently waiting for
  77   // to be requested.
  78   std::string waiting_for_hostname_;
  79
  80   // Whether WaitUntilHostHasBeenRequested is waiting for a hostname to be
  81   // requested and thus is running a nested message loop.
  82   bool is_waiting_for_hostname_;
  83
  84   // A list of hostnames for which resolution has already been requested. Only
  85   // to be accessed from the UI thread.
  86   std::vector<std::string> requested_hostnames_;
  87
  88   DISALLOW_COPY_AND_ASSIGN(HostResolutionRequestRecorder);
  89 };
  90
  91 }  // namespace
  92
  93 namespace chrome_browser_net {
  94
  95 class PredictorBrowserTest : public InProcessBrowserTest {
  96  public:
  97   PredictorBrowserTest()
  98       : startup_url_("http://host1:1"),
  99         referring_url_("http://host2:1"),
 100         target_url_("http://host3:1"),
 101         host_resolution_request_recorder_(new HostResolutionRequestRecorder) {
 102   }
 103
 104  protected:
 105   virtual void SetUpInProcessBrowserTestFixture() OVERRIDE {
 106     scoped_host_resolver_proc_.reset(new net::ScopedDefaultHostResolverProc(
 107         host_resolution_request_recorder_.get()));
 108     InProcessBrowserTest::SetUpInProcessBrowserTestFixture();
 109   }
 110
 111   virtual void TearDownInProcessBrowserTestFixture() OVERRIDE {
 112     InProcessBrowserTest::TearDownInProcessBrowserTestFixture();
 113     scoped_host_resolver_proc_.reset();
 114   }
 115
 116   void LearnAboutInitialNavigation(const GURL& url) {
 117     Predictor* predictor = browser()->profile()->GetNetworkPredictor();
 118     BrowserThread::PostTask(BrowserThread::IO,
 119                             FROM_HERE,
 120                             base::Bind(&Predictor::LearnAboutInitialNavigation,
 121                                        base::Unretained(predictor),
 122                                        url));
 123     content::RunAllPendingInMessageLoop(BrowserThread::IO);
 124   }
 125
 126   void LearnFromNavigation(const GURL& referring_url, const GURL& target_url) {
 127     Predictor* predictor = browser()->profile()->GetNetworkPredictor();
 128     BrowserThread::PostTask(BrowserThread::IO,
 129                             FROM_HERE,
 130                             base::Bind(&Predictor::LearnFromNavigation,
 131                                        base::Unretained(predictor),
 132                                        referring_url,
 133                                        target_url));
 134     content::RunAllPendingInMessageLoop(BrowserThread::IO);
 135   }
 136
 137   void PrepareFrameSubresources(const GURL& url) {
 138     Predictor* predictor = browser()->profile()->GetNetworkPredictor();
 139     predictor->PredictFrameSubresources(url, GURL());
 140   }
 141
 142   void GetListFromPrefsAsString(const char* list_path,
 143                                 std::string* value_as_string) const {
 144     PrefService* prefs = browser()->profile()->GetPrefs();
 145     const base::ListValue* list_value = prefs->GetList(list_path);
 146     JSONStringValueSerializer serializer(value_as_string);
 147     serializer.Serialize(*list_value);
 148   }
 149
 150   void WaitUntilHostHasBeenRequested(const std::string& hostname) {
 151     host_resolution_request_recorder_->WaitUntilHostHasBeenRequested(hostname);
 152   }
 153
 154   const GURL startup_url_;
 155   const GURL referring_url_;
 156   const GURL target_url_;
 157
 158  private:
 159   scoped_refptr<HostResolutionRequestRecorder>
 160       host_resolution_request_recorder_;
 161   scoped_ptr<net::ScopedDefaultHostResolverProc> scoped_host_resolver_proc_;
 162 };
 163
 164 IN_PROC_BROWSER_TEST_F(PredictorBrowserTest, PRE_ShutdownStartupCycle) {
 165   // Prepare state that will be serialized on this shut-down and read on next
 166   // start-up.
 167   LearnAboutInitialNavigation(startup_url_);
 168   LearnFromNavigation(referring_url_, target_url_);
 169 }
 170
 171 IN_PROC_BROWSER_TEST_F(PredictorBrowserTest, ShutdownStartupCycle) {
 172   // Make sure that the Preferences file is actually wiped of all DNS prefetch
 173   // related data after start-up.
 174   std::string cleared_startup_list;
 175   std::string cleared_referral_list;
 176   GetListFromPrefsAsString(prefs::kDnsPrefetchingStartupList,
 177                            &cleared_startup_list);
 178   GetListFromPrefsAsString(prefs::kDnsPrefetchingHostReferralList,
 179                            &cleared_referral_list);
 180
 181   EXPECT_THAT(cleared_startup_list, Not(HasSubstr(startup_url_.host())));
 182   EXPECT_THAT(cleared_referral_list, Not(HasSubstr(referring_url_.host())));
 183   EXPECT_THAT(cleared_referral_list, Not(HasSubstr(target_url_.host())));
 184
 185   // But also make sure this data has been first loaded into the Predictor, by
 186   // inspecting that the Predictor starts making the expected hostname requests.
 187   PrepareFrameSubresources(referring_url_);
 188   WaitUntilHostHasBeenRequested(startup_url_.host());
 189   WaitUntilHostHasBeenRequested(target_url_.host());
 190 }
 191
 192 }  // namespace chrome_browser_net
 193