Support javascript gtests in an extension background page.

chrome/test/base/javascript_browser_test.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/test/base/javascript_browser_test.h"
+
+#include "base/path_service.h"
+#include "base/strings/utf_string_conversions.h"
+#include "chrome/common/chrome_paths.h"
+#include "content/public/browser/web_ui.h"
+#include "ui/base/resource/resource_bundle.h"
+
+// static
+const base::FilePath::CharType
+    JavaScriptBrowserTest::kA11yAuditLibraryJSPath[] =
+        FILE_PATH_LITERAL("third_party/accessibility-audit/axs_testing.js");
+
+// static
+const base::FilePath::CharType JavaScriptBrowserTest::kMockJSPath[] =
+    FILE_PATH_LITERAL("chrome/third_party/mock4js/mock4js.js");
+
+// static
+const base::FilePath::CharType JavaScriptBrowserTest::kWebUILibraryJS[] =
+    FILE_PATH_LITERAL("test_api.js");
+
+// static
+const base::FilePath::CharType JavaScriptBrowserTest::kWebUITestFolder[] =
+    FILE_PATH_LITERAL("webui");
+
+void JavaScriptBrowserTest::AddLibrary(const base::FilePath& library_path) {
+  user_libraries_.push_back(library_path);
+}
+
+JavaScriptBrowserTest::JavaScriptBrowserTest() {
+}
+
+JavaScriptBrowserTest::~JavaScriptBrowserTest() {
+}
+
+void JavaScriptBrowserTest::SetUpOnMainThread() {
+  base::FilePath test_data_directory;
+  ASSERT_TRUE(PathService::Get(chrome::DIR_TEST_DATA, &test_data_directory));
+  test_data_directory = test_data_directory.Append(kWebUITestFolder);
+  library_search_paths_.push_back(test_data_directory);
+
+  base::FilePath gen_test_data_directory;
+  ASSERT_TRUE(
+      PathService::Get(chrome::DIR_GEN_TEST_DATA, &gen_test_data_directory));
+  library_search_paths_.push_back(gen_test_data_directory);
+
+  base::FilePath source_root_directory;
+  ASSERT_TRUE(PathService::Get(base::DIR_SOURCE_ROOT, &source_root_directory));
+  library_search_paths_.push_back(source_root_directory);
+
+  base::FilePath resources_pack_path;
+  PathService::Get(chrome::FILE_RESOURCES_PACK, &resources_pack_path);
+  ResourceBundle::GetSharedInstance().AddDataPackFromPath(
+      resources_pack_path, ui::SCALE_FACTOR_NONE);
+
+  AddLibrary(base::FilePath(kMockJSPath));
+  AddLibrary(base::FilePath(kWebUILibraryJS));
+}
+
+void JavaScriptBrowserTest::BuildJavascriptLibraries(
+    std::vector<base::string16>* libraries) {
+  ASSERT_TRUE(libraries != NULL);
+  std::vector<base::FilePath>::iterator user_libraries_iterator;
+  for (user_libraries_iterator = user_libraries_.begin();
+       user_libraries_iterator != user_libraries_.end();
+       ++user_libraries_iterator) {
+    std::string library_content;
+    if (user_libraries_iterator->IsAbsolute()) {
+      ASSERT_TRUE(
+          base::ReadFileToString(*user_libraries_iterator, &library_content))
+          << user_libraries_iterator->value();
+    } else {
+      bool ok = false;
+      std::vector<base::FilePath>::iterator library_search_path_iterator;
+      for (library_search_path_iterator = library_search_paths_.begin();
+           library_search_path_iterator != library_search_paths_.end();
+           ++library_search_path_iterator) {
+        ok = base::ReadFileToString(
+            base::MakeAbsoluteFilePath(
+                library_search_path_iterator->Append(*user_libraries_iterator)),
+            &library_content);
+        if (ok)
+          break;
+      }
+      ASSERT_TRUE(ok) << "User library not found: "

[Paweł Hajdan Jr., 2014/06/13 13:45:23]

If possible please use bool return value to communicate this instead.

[David Tseng, 2014/06/13 23:23:38]

I've left a TODO because it would involve changing the subclasses/generated
subclasses to assert the return value is true which I'll try to handle in a
second round focused on cleanup.

+                      << user_libraries_iterator->value();
+    }
+    library_content.append(";\n");
+
+    // This magic code puts filenames in stack traces.
+    library_content.append("//# sourceURL=");
+    library_content.append(user_libraries_iterator->BaseName().AsUTF8Unsafe());
+    library_content.append("\n");
+    libraries->push_back(base::UTF8ToUTF16(library_content));
+  }
+}
+
+base::string16 JavaScriptBrowserTest::BuildRunTestJSCall(
+    bool is_async,
+    const std::string& function_name,
+    const ConstValueVector& test_func_args) {
+  ConstValueVector arguments;
+  base::FundamentalValue* is_async_arg = new base::FundamentalValue(is_async);
+  arguments.push_back(is_async_arg);
+  base::StringValue* function_name_arg = new base::StringValue(function_name);
+  arguments.push_back(function_name_arg);
+  base::ListValue* baked_argument_list = new base::ListValue();
+  ConstValueVector::const_iterator arguments_iterator;
+  for (arguments_iterator = test_func_args.begin();
+       arguments_iterator != test_func_args.end();
+       ++arguments_iterator) {
+    baked_argument_list->Append((*arguments_iterator)->DeepCopy());
+  }
+  arguments.push_back(baked_argument_list);
+  return content::WebUI::GetJavascriptCall(std::string("runTest"),
+                                           arguments.get());
+}