Run IDB layout test suite as browser tests instead of ui tests

content/test/layout_browsertest.cc

+// Copyright (c) 2012 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 "content/test/layout_browsertest.h"
+
+#include "base/file_path.h"
+#include "base/file_util.h"
+#include "base/path_service.h"
+#include "base/scoped_temp_dir.h"
+#include "base/string_util.h"
+#include "base/utf_string_conversions.h"
+#include "chrome/browser/ui/browser.h"
+#include "chrome/test/base/in_process_browser_test.h"
+#include "chrome/test/base/ui_test_utils.h"
+#include "content/browser/tab_contents/tab_contents.h"
+#include "content/public/common/content_paths.h"
+#include "net/base/net_util.h"
+
+namespace {
+
+size_t FindInsertPosition(const std::string& html) {
+  size_t tag_start = html.find("<html");
+  if (tag_start == std::string::npos)
+    return 0;
+  size_t tag_end = html.find(">", tag_start);
+  if (tag_end == std::string::npos)
+    return 0;
+  return tag_end + 1;
+}
+
+void ReadExpectedResult(const FilePath& result_dir_path,
+                        const std::string test_case_file_name,
+                        std::string* expected_result_value) {
+  FilePath expected_result_path(result_dir_path);
+  expected_result_path = expected_result_path.AppendASCII(test_case_file_name);
+  expected_result_path = expected_result_path.InsertBeforeExtension(
+      FILE_PATH_LITERAL("-expected"));
+  expected_result_path =
+      expected_result_path.ReplaceExtension(FILE_PATH_LITERAL("txt"));
+  std::string raw_result;
+  EXPECT_TRUE(file_util::ReadFileToString(expected_result_path, &raw_result));
+  TrimString(raw_result, "\n", expected_result_value);
+}
+
+void ScrapeResultFromBrowser(Browser* browser, std::string* actual_text) {
+  DOMElementProxyRef doc = ui_test_utils::GetActiveDOMDocument(browser);
+  DOMElementProxyRef body =
+      doc->FindElement(DOMElementProxy::By::XPath("//body"));
+  ASSERT_TRUE(body.get());
+  ASSERT_TRUE(body->GetInnerText(actual_text));
+}
+
+static const std::string preamble =
+      "\n<script>\n"
+      "function LayoutTestController() {\n"
+      "  this.dumpAsText = function () {};\n"
+      "  this.waitUntilDone = function () {};\n"
+      "  this.notifyDone = function () {\n"
+      "    document.title = 'done';\n"
+      "  }\n"
+      "}\n"
+      "window.layoutTestController = new LayoutTestController();\n"
+      "</script>";
+
+}
+
+InProcessBrowserLayoutTest::InProcessBrowserLayoutTest(
+    const FilePath relative_layout_test_path)
+        : original_relative_path_(relative_layout_test_path) {
+  EnableDOMAutomation();
+}
+
+InProcessBrowserLayoutTest::~InProcessBrowserLayoutTest() {}
+
+void InProcessBrowserLayoutTest::SetUpInProcessBrowserTestFixture() {
+  ASSERT_TRUE(scoped_temp_dir_.CreateUniqueTempDir());
+  FilePath ThirdParty_WebKit_LayoutTests;
+  ASSERT_TRUE(PathService::Get(content::DIR_LAYOUT_TESTS,
+                               &ThirdParty_WebKit_LayoutTests));
+  our_original_layout_test_dir_ =
+      ThirdParty_WebKit_LayoutTests.Append(original_relative_path_);
+  ASSERT_TRUE(file_util::DirectoryExists(our_original_layout_test_dir_));
+  our_layout_test_temp_dir_ = scoped_temp_dir_.path()
+      .AppendASCII("LayoutTests").Append(original_relative_path_);
+  ASSERT_TRUE(file_util::CreateDirectory(our_layout_test_temp_dir_));
+  file_util::CopyDirectory(
+      our_original_layout_test_dir_.AppendASCII("resources"),
+      our_layout_test_temp_dir_.AppendASCII("resources"),
+      true /*recursive*/);
+}
+
+void InProcessBrowserLayoutTest::RunLayoutTest(
+    const std::string& test_case_file_name) {
+  GURL test_url;
+  WriteModifiedFile(test_case_file_name, &test_url);
+
+  LOG(INFO) << "Navigating to URL " << test_url << " and blocking.";
+  const string16 expected_title = ASCIIToUTF16("done");
+  ui_test_utils::TitleWatcher title_watcher(
+      browser()->GetSelectedWebContents(), expected_title);
+  ui_test_utils::NavigateToURL(browser(), test_url);
+  string16 final_title = title_watcher.WaitAndGetTitle();
+  EXPECT_EQ(expected_title, final_title);
+
+  std::string actual_text;
+  ScrapeResultFromBrowser(browser(), &actual_text);
+
+  std::string expected_text;
+  ReadExpectedResult(our_original_layout_test_dir_, test_case_file_name,
+                     &expected_text);
+
+  EXPECT_EQ(expected_text, actual_text);
+}
+
+void InProcessBrowserLayoutTest::AddResourceForLayoutTest(
+    const FilePath& parent_dir,
+    const FilePath& resource_name) {
+  FilePath source;
+  ASSERT_TRUE(PathService::Get(content::DIR_LAYOUT_TESTS, &source));
+  source = source.Append(parent_dir);
+  source = source.Append(resource_name);
+
+  ASSERT_TRUE(file_util::PathExists(source));
+
+  FilePath dest_parent_dir = scoped_temp_dir_.path().
+      AppendASCII("LayoutTests").Append(parent_dir);
+  ASSERT_TRUE(file_util::CreateDirectory(dest_parent_dir));
+  FilePath dest = dest_parent_dir.Append(resource_name);
+
+  if (file_util::DirectoryExists(source)) {
+    ASSERT_TRUE(file_util::CopyDirectory(source, dest, true));
+  } else {
+    ASSERT_TRUE(file_util::CopyFile(source, dest));
+  }
+}
+
+void InProcessBrowserLayoutTest::WriteModifiedFile(
+    const std::string& test_case_file_name, GURL* test_url) {
+  FilePath path_to_single_test =
+      our_original_layout_test_dir_.AppendASCII(test_case_file_name);
+  std::string test_html;
+  ASSERT_TRUE(file_util::ReadFileToString(path_to_single_test, &test_html));
+
+  size_t insertion_position = FindInsertPosition(test_html);
+  test_html.insert(insertion_position, preamble);
+  FilePath new_test_file_path(our_layout_test_temp_dir_);
+  new_test_file_path = new_test_file_path.AppendASCII(test_case_file_name);
+  ASSERT_TRUE(file_util::WriteFile(new_test_file_path,
+                                   &test_html.at(0),
+                                   static_cast<int>(test_html.size())));
+  *test_url = net::FilePathToFileURL(new_test_file_path);
+}