Support javascript gtests in an extension background page.

chrome/browser/resources/chromeos/chromevox/chromevox_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 "chrome/browser/resources/chromeos/chromevox/chromevox_browsertest.h"
+
+#include "ash/accessibility_delegate.h"
+#include "base/json/json_reader.h"
+#include "base/strings/utf_string_conversions.h"
+#include "base/values.h"
+#include "chrome/browser/chrome_notification_types.h"
+#include "chrome/browser/chromeos/accessibility/accessibility_manager.h"
+#include "chrome/browser/extensions/browsertest_util.h"
+#include "chrome/browser/profiles/profile.h"
+#include "chrome/common/extensions/extension_constants.h"
+#include "content/public/browser/notification_service.h"
+#include "content/public/browser/web_contents.h"
+#include "content/public/test/browser_test_utils.h"
+#include "extensions/browser/extension_host.h"
+
+void ChromeVoxBrowserTest::SetUpOnMainThread() {
+  JavaScriptBrowserTest::SetUpOnMainThread();
+
+  chromevox_load_looper_ = new content::MessageLoopRunner();
+  registrar_.Add(this,
+                 chrome::NOTIFICATION_EXTENSION_HOST_DID_STOP_LOADING,
+                 content::NotificationService::AllSources());
+
+  chromeos::AccessibilityManager::Get()->EnableSpokenFeedback(
+      true, ash::A11Y_NOTIFICATION_NONE);
+
+  chromevox_load_looper_->Run();

[dmazzoni, 2014/06/09 06:59:45]

Optional: it'd be nice to extract a helper class (SpokenFeedbackToggleWaiter,
etc.) that enables ChromeVox and waits for it to finish loading, for use by
other tests, like spoken_feedback_browsertest, which cheats by just waiting on
the spoken feedback enabled speech.

[David Tseng, 2014/06/10 05:35:21]

Ok, done.

+}
+
+bool ChromeVoxBrowserTest::RunJavascriptTestF(bool is_async,
+                                              const std::string& test_fixture,
+                                              const std::string& test_name) {
+  ConstValueVector args;
+  args.push_back(new base::StringValue(test_fixture));
+  args.push_back(new base::StringValue(test_name));
+  std::vector<base::string16> scripts;
+  if (!libs_loaded_) {
+    BuildJavascriptLibraries(&scripts);
+    libs_loaded_ = true;
+  }
+  scripts.push_back(BuildRunTestJSCall(is_async, "RUN_TEST_F", args));
+
+  base::string16 script_16 = JoinString(scripts, '\n');
+  std::string script = base::UTF16ToUTF8(script_16);
+
+  std::string result =
+      extensions::browsertest_util::ExecuteScriptInBackgroundPage(
+          chromeos::AccessibilityManager::Get()->profile(),
+          extension_misc::kChromeVoxExtensionId,
+          script);
+
+  base::JSONReader reader;
+  scoped_ptr<base::Value> valueResult;

[dmazzoni, 2014/06/09 06:59:45]

Nit: value_result

[David Tseng, 2014/06/10 05:35:21]

Done.

+  valueResult.reset(reader.Read(result));
+  CHECK_EQ(base::Value::TYPE_DICTIONARY, valueResult->GetType());
+  base::DictionaryValue* dictValue =

[dmazzoni, 2014/06/09 06:59:45]

same - switch to c++ naming style for locals in this function

[David Tseng, 2014/06/10 05:35:21]

Done.

+      static_cast<base::DictionaryValue*>(valueResult.get());
+  bool testResult;
+  std::string testResultMessage;
+  CHECK(dictValue->GetBoolean("result", &testResult));
+  CHECK(dictValue->GetString("message", &testResultMessage));
+  return testResult;
+}
+
+void ChromeVoxBrowserTest::Observe(
+    int type,
+    const content::NotificationSource& source,
+    const content::NotificationDetails& details) {
+  switch (type) {
+    case chrome::NOTIFICATION_EXTENSION_HOST_DID_STOP_LOADING: {
+      extensions::ExtensionHost* host =
+          content::Details<extensions::ExtensionHost>(details).ptr();
+      if (host->extension_id() == extension_misc::kChromeVoxExtensionId) {
+        chromevox_load_looper_->Quit();
+      }
+      break;
+    }
+  }
+}