Block tabs.executeScript() from executing until user grants permission

chrome/browser/extensions/active_script_controller_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/macros.h"
 #include "chrome/browser/extensions/active_script_controller.h"
 #include "chrome/browser/extensions/extension_action.h"
 #include "chrome/browser/extensions/extension_browsertest.h"
 #include "chrome/browser/extensions/extension_test_message_listener.h"
 #include "chrome/browser/extensions/location_bar_controller.h"
 #include "chrome/browser/extensions/tab_helper.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/tabs/tab_strip_model.h"
 #include "chrome/test/base/ui_test_utils.h"
 #include "extensions/common/feature_switch.h"
 #include "net/test/embedded_test_server/embedded_test_server.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace extensions {
 
+namespace {
+
+const char kInjectAttempted[] = "inject attempted";
+const char kInjectSucceeded[] = "inject succeeded";
+
+enum InjectionType {
+  CONTENT_SCRIPT,
+  EXECUTE_SCRIPT
+};
+
+enum RequiresConsent {
+  REQUIRES_CONSENT,
+  DOES_NOT_REQUIRE_CONSENT
+};
+
+}  // namespace
+
 class ActiveScriptControllerBrowserTest : public ExtensionBrowserTest {
  public:
   ActiveScriptControllerBrowserTest()
       : feature_override_(FeatureSwitch::scripts_require_action(),
                           FeatureSwitch::OVERRIDE_ENABLED) {}
  private:
   FeatureSwitch::ScopedOverride feature_override_;
 };
 
 class ActiveScriptTester {
  public:
   ActiveScriptTester(const std::string& name,
                      const Extension* extension,
-                     bool expect_has_action);
+                     Browser* browser,
+                     RequiresConsent requires_consent,
+                     InjectionType type);
   ~ActiveScriptTester();
 
-  testing::AssertionResult Verify(Browser* browser);
+  testing::AssertionResult Verify();
 
  private:
+  // Returns the location bar controller, or NULL if one does not exist.
+  LocationBarController* GetLocationBarController();
+
+  // Returns the active script controller, or NULL if one does not exist.
+  ActiveScriptController* GetActiveScriptController();
+
+  // Get the ExtensionAction for this extension, or NULL if one does not exist.
+  ExtensionAction* GetAction();
+
   // The name of the extension, and also the message it sends.
   std::string name_;
 
   // The extension associated with this tester.
   const Extension* extension_;
 
-  // Whether or not we expect the extension to have an action for script
-  // injection.
-  bool expect_has_action_;
+  // The browser the tester is running in.
+  Browser* browser_;
+
+  // Whether or not the extension has permission to run the script without
+  // asking the user.
+  RequiresConsent requires_consent_;
+
+  // The type of injection this tester uses.
+  InjectionType type_;
 
   // All of these extensions should inject a script (either through content
   // scripts or through chrome.tabs.executeScript()) that sends a message with
-  // their names (for verification).
-  // Be prepared to wait for each extension to inject the script.
-  linked_ptr<ExtensionTestMessageListener> listener_;
+  // the |kInjectSucceeded| message.
+  linked_ptr<ExtensionTestMessageListener> inject_attempt_listener_;
+
+  // After trying to inject the script, extensions sending the script via
+  // chrome.tabs.executeScript() send a |kInjectAttempted| message.
+  linked_ptr<ExtensionTestMessageListener> inject_success_listener_;
 };
 
 ActiveScriptTester::ActiveScriptTester(const std::string& name,
                                        const Extension* extension,
-                                       bool expect_has_action)
+                                       Browser* browser,
+                                       RequiresConsent requires_consent,
+                                       InjectionType type)
     : name_(name),
       extension_(extension),
-      expect_has_action_(expect_has_action),
-      listener_(
-          new ExtensionTestMessageListener(name, false /* won't reply */)) {
+      browser_(browser),
+      requires_consent_(requires_consent),
+      type_(type),
+      inject_attempt_listener_(
+          new ExtensionTestMessageListener(kInjectAttempted,
+                                           false /* won't reply */)),
+      inject_success_listener_(
+          new ExtensionTestMessageListener(kInjectSucceeded,
+                                           false /* won't reply */)) {
+  inject_attempt_listener_->set_extension_id(extension->id());
+  inject_success_listener_->set_extension_id(extension->id());
 }
 
 ActiveScriptTester::~ActiveScriptTester() {
 }
 
-testing::AssertionResult ActiveScriptTester::Verify(Browser* browser) {
+testing::AssertionResult ActiveScriptTester::Verify() {
   if (!extension_)
     return testing::AssertionFailure() << "Could not load extension: " << name_;
 
-  listener_->WaitUntilSatisfied();
-  content::WebContents* web_contents =
-      browser ? browser->tab_strip_model()->GetActiveWebContents() : NULL;
-
-  if (!web_contents)
-    return testing::AssertionFailure() << "Could not find web contents.";
-
-  TabHelper* tab_helper = TabHelper::FromWebContents(web_contents);
-  if (!tab_helper)
-    return testing::AssertionFailure() << "Could not find tab helper.";
+  // If it's not a content script, the Extension lets us know when it has
+  // attempted to inject the script.
+  // This means there is a potential for a race condition with content scripts;
+  // however, since they are all injected at document_start, this shouldn't be
+  // a problem. If these tests start failing, though, that might be it.
+  if (type_ == EXECUTE_SCRIPT)
+    inject_attempt_listener_->WaitUntilSatisfied();
+
+  // Make sure all running tasks are complete.
+  content::RunAllPendingInMessageLoop();
+
+  LocationBarController* location_bar_controller = GetLocationBarController();
+  if (!location_bar_controller) {
+    return testing::AssertionFailure()
+        << "Could not find location bar controller";
+  }
 
   ActiveScriptController* controller =
-      tab_helper->location_bar_controller()->active_script_controller();
+      location_bar_controller->active_script_controller();
   if (!controller)
     return testing::AssertionFailure() << "Could not find controller.";
 
-  bool has_action = controller->GetActionForExtension(extension_) != NULL;
-  if (expect_has_action_ != has_action) {
+  ExtensionAction* action = GetAction();
+  bool has_action = action != NULL;
+
+  // An extension should have an action displayed iff it requires user consent.
+  if ((requires_consent_ == REQUIRES_CONSENT && !has_action) ||
+      (requires_consent_ == DOES_NOT_REQUIRE_CONSENT && has_action)) {
     return testing::AssertionFailure()
-        << "Improper action status: expected " << expect_has_action_
-        << ", found " << has_action;
+        << "Improper action status for " << name_ << ": expected "
+        << (requires_consent_ == REQUIRES_CONSENT) << ", found " << has_action;
+  }
+
+  // If the extension has permission, we should be able to simply wait for it
+  // to execute.
+  if (requires_consent_ == DOES_NOT_REQUIRE_CONSENT) {
+    inject_success_listener_->WaitUntilSatisfied();
+    return testing::AssertionSuccess();
+  }
+
+  // Otherwise, we don't have permission, and have to grant it. Ensure the
+  // script has *not* already executed.
+  // Currently, it's okay for content scripts to execute, because we don't
+  // block them.
+  // TODO(rdevlin.cronin): Fix this.
+  if (inject_success_listener_->was_satisfied() && type_ != CONTENT_SCRIPT) {
+    return testing::AssertionFailure() <<
+        name_ << "'s script ran without permission.";
+  }
+
+  // If we reach this point, we should always have an action.
+  DCHECK(action);
+
+  // Grant permission by clicking on the extension action.
+  location_bar_controller->OnClicked(action);
+
+  // Now, the extension should be able to inject the script.
+  inject_success_listener_->WaitUntilSatisfied();
+
+  // The Action should have disappeared.
+  has_action = GetAction() != NULL;
+  if (has_action) {
+    return testing::AssertionFailure()
+        << "Extension " << name_ << " has lingering action.";
   }
 
   return testing::AssertionSuccess();
 }
 
+LocationBarController* ActiveScriptTester::GetLocationBarController() {
+  content::WebContents* web_contents =
+      browser_ ? browser_->tab_strip_model()->GetActiveWebContents() : NULL;
+
+  if (!web_contents)
+    return NULL;
+
+  TabHelper* tab_helper = TabHelper::FromWebContents(web_contents);
+  return tab_helper ? tab_helper->location_bar_controller() : NULL;
+}
+
+ActiveScriptController* ActiveScriptTester::GetActiveScriptController() {
+  LocationBarController* location_bar_controller = GetLocationBarController();
+  return location_bar_controller ?
+      location_bar_controller->active_script_controller() : NULL;
+}
+
+ExtensionAction* ActiveScriptTester::GetAction() {
+  ActiveScriptController* controller = GetActiveScriptController();
+  return controller ? controller->GetActionForExtension(extension_) : NULL;
+}
+
 IN_PROC_BROWSER_TEST_F(ActiveScriptControllerBrowserTest,
                        ActiveScriptsAreDisplayed) {
   base::FilePath active_script_path =
       test_data_dir_.AppendASCII("active_script");
 
   const char* kExtensionNames[] = {
+      "inject_scripts_all_hosts",
+      "inject_scripts_explicit_hosts",
       "content_scripts_all_hosts",
-      "inject_scripts_all_hosts",
       "content_scripts_explicit_hosts"
   };
 
   // First, we load up three extensions:
+  // - An extension that injects scripts into all hosts,
+  // - An extension that injects scripts into explicit hosts,
   // - An extension with a content script that runs on all hosts,
-  // - An extension that injects scripts into all hosts,
   // - An extension with a content script that runs on explicit hosts.
+  // The extensions that operate on explicit hosts have permission; the ones
+  // that request all hosts require user consent.
   ActiveScriptTester testers[] = {
       ActiveScriptTester(
           kExtensionNames[0],
           LoadExtension(active_script_path.AppendASCII(kExtensionNames[0])),
-          true /* expect action */),
+          browser(),
+          REQUIRES_CONSENT,
+          EXECUTE_SCRIPT),
       ActiveScriptTester(
           kExtensionNames[1],
           LoadExtension(active_script_path.AppendASCII(kExtensionNames[1])),
-          true /* expect action */),
+          browser(),
+          DOES_NOT_REQUIRE_CONSENT,
+          EXECUTE_SCRIPT),
       ActiveScriptTester(
           kExtensionNames[2],
           LoadExtension(active_script_path.AppendASCII(kExtensionNames[2])),
-          false /* expect action */)
+          browser(),
+          REQUIRES_CONSENT,
+          CONTENT_SCRIPT),
+      ActiveScriptTester(
+          kExtensionNames[3],
+          LoadExtension(active_script_path.AppendASCII(kExtensionNames[3])),
+          browser(),
+          DOES_NOT_REQUIRE_CONSENT,
+          CONTENT_SCRIPT),
   };
 
   // Navigate to an URL (which matches the explicit host specified in the
   // extension content_scripts_explicit_hosts). All three extensions should
   // inject the script.
   ASSERT_TRUE(embedded_test_server()->InitializeAndWaitUntilReady());
   ui_test_utils::NavigateToURL(
       browser(), embedded_test_server()->GetURL("/extensions/test_file.html"));
 
   for (size_t i = 0u; i < arraysize(testers); ++i)
-    ASSERT_TRUE(testers[i].Verify(browser())) << kExtensionNames[i];
+    EXPECT_TRUE(testers[i].Verify()) << kExtensionNames[i];
 }
 
 }  // namespace extensions