Update ActivityLog detection to use previous values, hrefs.

chrome/browser/extensions/activity_log/ad_injection_browsertest.cc

 // Copyright 2014 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 "base/files/file_path.h"
 #include "base/scoped_observer.h"
 #include "base/strings/string_number_conversions.h"
+#include "base/strings/string_util.h"
 #include "base/strings/stringprintf.h"
 #include "chrome/browser/extensions/activity_log/activity_actions.h"
 #include "chrome/browser/extensions/activity_log/activity_log.h"
 #include "chrome/browser/extensions/activity_log/ad_network_database.h"
 #include "chrome/browser/extensions/extension_browsertest.h"
 #include "chrome/browser/extensions/extension_test_message_listener.h"
 #include "chrome/test/base/ui_test_utils.h"
 #include "extensions/common/extension.h"
 #include "net/test/embedded_test_server/embedded_test_server.h"
 #include "net/test/embedded_test_server/http_response.h"
 #include "url/gurl.h"
 
 namespace net {
 namespace test_server {
 struct HttpRequest;
 }
 }
 
 namespace extensions {
 
 namespace {
 
 // The "ad network" that we are using. Any src or href equal to this should be
 // considered an ad network.
-const char kAdNetwork[] = "http://www.known-ads.adnetwork";
+const char kAdNetwork1[] = "http://www.known-ads.adnetwork";
+const char kAdNetwork2[] = "http://www.also-known-ads.adnetwork";
 
 // The current stage of the test.
 enum Stage {
   BEFORE_RESET,  // We are about to reset the page.
   RESETTING,     // We are resetting the page.
   TESTING        // The reset is complete, and we are testing.
 };
 
 // The string sent by the test to indicate that the page reset will begin.
 const char kResetBeginString[] = "Page Reset Begin";
 // The string sent by the test to indicate that page reset is complete.
 const char kResetEndString[] = "Page Reset End";
 // The string sent by the test to indicate a JS error was caught in the test.
 const char kJavascriptErrorString[] = "Testing Error";
 // The string sent by the test to indicate that we have concluded the full test.
 const char kTestCompleteString[] = "Test Complete";
 
+std::string InjectionTypeToString(Action::InjectionType type) {
+  switch (type) {
+    case Action::NO_AD_INJECTION:
+      return "No Ad Injection";
+    case Action::INJECTION_NEW_AD:
+      return "Injection New Ad";
+    case Action::INJECTION_REMOVED_AD:
+      return "Injection Removed Ad";
+    case Action::INJECTION_REPLACED_AD:
+      return "Injection Replaced Ad";
+    case Action::INJECTION_LIKELY_NEW_AD:
+      return "Injection Likely New Ad";
+    case Action::INJECTION_LIKELY_REPLACED_AD:
+      return "Injection Likely Replaced Ad";
+    case Action::NUM_INJECTION_TYPES:
+      return "Num Injection Types";
+  }
+  return std::string();
+}
+
 // An implementation of ActivityLog::Observer that, for every action, sends it
 // through Action::DidInjectAd(). This will keep track of the observed
 // injections, and can be enabled or disabled as needed (for instance, this
 // should be disabled while we are resetting the page).
 class ActivityLogObserver : public ActivityLog::Observer {
  public:
   explicit ActivityLogObserver(content::BrowserContext* context);
   virtual ~ActivityLogObserver();
 
-  void set_enabled(bool enabled) { enabled_ = enabled; }
-  size_t injection_count() const { return injection_count_; }
+  // Disable the observer (e.g., to reset the page).
+  void disable() { enabled_ = false; }
+
+  // Enable the observer, resetting the state.
+  void enable() {
+    injection_type_ = Action::NO_AD_INJECTION;
+    found_multiple_injections_ = false;
+    enabled_ = true;
+  }
+
+  Action::InjectionType injection_type() const { return injection_type_; }
+
+  bool found_multiple_injections() const { return found_multiple_injections_; }
 
  private:
   virtual void OnExtensionActivity(scoped_refptr<Action> action) OVERRIDE;
 
   ScopedObserver<ActivityLog, ActivityLog::Observer> scoped_observer_;
+
+  // The associated BrowserContext.
   content::BrowserContext* context_;
-  size_t injection_count_;
+
+  // The type of the last injection.
+  Action::InjectionType injection_type_;
+
+  // Whether or not we found multiple injection types (which shouldn't happen).
+  bool found_multiple_injections_;
+
+  // Whether or not the observer is enabled.
   bool enabled_;
 };
 
 ActivityLogObserver::ActivityLogObserver(content::BrowserContext* context)
     : scoped_observer_(this),
       context_(context),
-      injection_count_(0u),
+      injection_type_(Action::NO_AD_INJECTION),
+      found_multiple_injections_(false),
       enabled_(false) {
   ActivityLog::GetInstance(context_)->AddObserver(this);
 }
 
 ActivityLogObserver::~ActivityLogObserver() {}
 
 void ActivityLogObserver::OnExtensionActivity(scoped_refptr<Action> action) {
-  if (enabled_ && action->DidInjectAd(NULL /* no rappor service */) !=
-          Action::NO_AD_INJECTION) {
-    ++injection_count_;
+  if (!enabled_)
+    return;
+
+  Action::InjectionType type =
+      action->DidInjectAd(NULL /* no rappor service */);
+  if (type != Action::NO_AD_INJECTION) {
+    if (injection_type_ != Action::NO_AD_INJECTION)
+      found_multiple_injections_ = true;
+    injection_type_ = type;
   }
 }
 
 // A mock for the AdNetworkDatabase. This simply says that the URL
 // http://www.known-ads.adnetwork is an ad network, and nothing else is.
 class TestAdNetworkDatabase : public AdNetworkDatabase {
  public:
   TestAdNetworkDatabase();
   virtual ~TestAdNetworkDatabase();
 
  private:
   virtual bool IsAdNetwork(const GURL& url) const OVERRIDE;
 
-  GURL ad_network_url_;
+  GURL ad_network_url1_;
+  GURL ad_network_url2_;
 };
 
-TestAdNetworkDatabase::TestAdNetworkDatabase() : ad_network_url_(kAdNetwork) {}
+TestAdNetworkDatabase::TestAdNetworkDatabase() : ad_network_url1_(kAdNetwork1),
+                                                 ad_network_url2_(kAdNetwork2) {
+}
+
 TestAdNetworkDatabase::~TestAdNetworkDatabase() {}
 
 bool TestAdNetworkDatabase::IsAdNetwork(const GURL& url) const {
-  return url == ad_network_url_;
+  return url == ad_network_url1_ || url == ad_network_url2_;
 }
 
 scoped_ptr<net::test_server::HttpResponse> HandleRequest(
     const net::test_server::HttpRequest& request) {
   scoped_ptr<net::test_server::BasicHttpResponse> response(
       new net::test_server::BasicHttpResponse());
   response->set_code(net::HTTP_OK);
   return response.PassAs<net::test_server::HttpResponse>();
 }
 
@@ skipping 18 matching lines @@
 
   // Handle a JS error encountered in a test.
   testing::AssertionResult HandleJSError(const std::string& message);
 
   const base::FilePath& test_data_dir() { return test_data_dir_; }
 
   ExtensionTestMessageListener* listener() { return listener_.get(); }
 
   ActivityLogObserver* observer() { return observer_.get(); }
 
-  void set_expected_injections(size_t expected_injections) {
-    expected_injections_ = expected_injections;
-  }
-
  private:
   // The name of the last completed test; used in case of unexpected failure for
   // debugging.
   std::string last_test_;
 
-  // The number of expected injections.
-  size_t expected_injections_;
-
   // A listener for any messages from our ad-injecting extension.
   scoped_ptr<ExtensionTestMessageListener> listener_;
 
   // An observer to be alerted when we detect ad injection.
   scoped_ptr<ActivityLogObserver> observer_;
 
   // The current stage of the test.
   Stage stage_;
 };
 
-AdInjectionBrowserTest::AdInjectionBrowserTest()
-    : expected_injections_(0u), stage_(BEFORE_RESET) {}
+AdInjectionBrowserTest::AdInjectionBrowserTest() : stage_(BEFORE_RESET) {
+}
 
-AdInjectionBrowserTest::~AdInjectionBrowserTest() {}
+AdInjectionBrowserTest::~AdInjectionBrowserTest() {
+}
 
 void AdInjectionBrowserTest::SetUpOnMainThread() {
   ExtensionBrowserTest::SetUpOnMainThread();
 
   ASSERT_TRUE(embedded_test_server()->InitializeAndWaitUntilReady());
   embedded_test_server()->RegisterRequestHandler(base::Bind(&HandleRequest));
 
   test_data_dir_ =
       test_data_dir_.AppendASCII("activity_log").AppendASCII("ad_injection");
   observer_.reset(new ActivityLogObserver(profile()));
@@ skipping 21 matching lines @@
 }
 
 testing::AssertionResult AdInjectionBrowserTest::HandleResetBeginStage() {
   if (stage_ != BEFORE_RESET) {
     return testing::AssertionFailure()
            << "In incorrect stage. Last Test: " << last_test_;
   }
 
   // Stop looking for ad injection, since some of the reset could be considered
   // ad injection.
-  observer()->set_enabled(false);
+  observer()->disable();
   stage_ = RESETTING;
   return testing::AssertionSuccess();
 }
 
 testing::AssertionResult AdInjectionBrowserTest::HandleResetEndStage() {
   if (stage_ != RESETTING) {
     return testing::AssertionFailure()
            << "In incorrect stage. Last test: " << last_test_;
   }
 
   // Look for ad injection again, now that the reset is over.
-  observer()->set_enabled(true);
+  observer()->enable();
   stage_ = TESTING;
   return testing::AssertionSuccess();
 }
 
 testing::AssertionResult AdInjectionBrowserTest::HandleTestingStage(
     const std::string& message) {
   if (stage_ != TESTING) {
     return testing::AssertionFailure()
            << "In incorrect stage. Last test: " << last_test_;
   }
 
   // The format for a testing message is:
   // "<test_name>:<expected_change>"
   // where <test_name> is the name of the test and <expected_change> is
   // either -1 for no ad injection (to test against false positives) or the
   // number corresponding to ad_detection::InjectionType.
   size_t sep = message.find(':');
   int expected_change = -1;
   if (sep == std::string::npos ||
       !base::StringToInt(message.substr(sep + 1), &expected_change) ||
       (expected_change < Action::NO_AD_INJECTION ||
        expected_change >= Action::NUM_INJECTION_TYPES)) {
     return testing::AssertionFailure()
            << "Invalid message received for testing stage: " << message;
   }
 
   last_test_ = message.substr(0, sep);
 
-  // TODO(rdevlin.cronin): Currently, we lump all kinds of ad injection into
-  // one counter, because we can't differentiate (or catch all of them). Change
-  // this when we can.
-  // Increment the expected change, and compare.
-  if (expected_change != Action::NO_AD_INJECTION)
-    ++expected_injections_;
+  Action::InjectionType expected_injection =
+      static_cast<Action::InjectionType>(expected_change);
   std::string error;
-  if (expected_injections_ != observer()->injection_count()) {
+  if (observer()->found_multiple_injections()) {
+    error = "Found multiple injection types. "
+            "Only one injection is expected per test.";
+  } else if (expected_injection != observer()->injection_type()) {
     // We need these static casts, because size_t is different on different
     // architectures, and printf becomes unhappy.
-    error =
-        base::StringPrintf("Injection Count Mismatch: Expected %u, Actual %u",
-                           static_cast<unsigned int>(expected_injections_),
-                           static_cast<unsigned int>(
-                               observer()->injection_count()));
+    error = base::StringPrintf(
+        "Incorrect Injection Found: Expected: %s, Actual: %s",
+        InjectionTypeToString(expected_injection).c_str(),
+        InjectionTypeToString(observer()->injection_type()).c_str());
   }
 
   stage_ = BEFORE_RESET;
 
-  if (!error.empty())
-    return testing::AssertionFailure() << error;
+  if (!error.empty()) {
+    return testing::AssertionFailure()
+        << "Error in Test '" << last_test_ << "': " << error;
+  }
 
   return testing::AssertionSuccess();
 }
 
 testing::AssertionResult AdInjectionBrowserTest::HandleJSError(
     const std::string& message) {
   // The format for a testing message is:
   // "Testing Error:<test_name>:<error>"
   // where <test_name> is the name of the test and <error> is the error which
   // was encountered.
@@ skipping 38 matching lines @@
       ASSERT_TRUE(HandleResetEndStage());
     } else if (!message.compare(
                    0, strlen(kJavascriptErrorString), kJavascriptErrorString)) {
       EXPECT_TRUE(HandleJSError(message));
     } else if (message == kTestCompleteString) {
       break;  // We're done!
     } else {  // We're in some kind of test.
       EXPECT_TRUE(HandleTestingStage(message));
     }
 
-    // We set the expected injections to be whatever they actually are so that
-    // we only fail one test, instead of all subsequent tests.
-    set_expected_injections(observer()->injection_count());
-
     // In all cases (except for "Test Complete", in which case we already
     // break'ed), we reply with a continue message.
     listener()->Reply("Continue");
     listener()->Reset();
   }
 }
 
 // TODO(rdevlin.cronin): We test a good amount of ways of injecting ads with
 // the above test, but more is better in testing.
 // See crbug.com/357204.
 
 }  // namespace extensions