Add browser test for CustomizationWallpaperDownloader.

chrome/browser/chromeos/customization_wallpaper_downloader_browsertest.cc

Index: chrome/browser/chromeos/customization_wallpaper_downloader_browsertest.cc
diff --git a/chrome/browser/chromeos/customization_wallpaper_downloader_browsertest.cc b/chrome/browser/chromeos/customization_wallpaper_downloader_browsertest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..180211e32899964eee381132dbeaab1416885896
--- /dev/null
+++ b/chrome/browser/chromeos/customization_wallpaper_downloader_browsertest.cc
@@ -0,0 +1,320 @@
+// 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 <vector>
+
+#include "ash/desktop_background/desktop_background_controller.h"
+#include "ash/shell.h"
+#include "base/command_line.h"
+#include "base/files/scoped_temp_dir.h"
+#include "base/run_loop.h"
+#include "base/time/time.h"
+#include "chrome/browser/chromeos/customization_document.h"
+#include "chrome/browser/chromeos/customization_wallpaper_downloader.h"
+#include "chrome/browser/chromeos/login/wallpaper_manager.h"
+#include "chrome/browser/chromeos/login/wallpaper_manager_test_utils.h"
+#include "chrome/browser/google/google_url_tracker.h"
+#include "chrome/test/base/in_process_browser_test.h"
+#include "chrome/test/base/testing_browser_process.h"
+#include "chromeos/chromeos_switches.h"
+#include "net/http/http_response_headers.h"
+#include "net/http/http_status_code.h"
+#include "net/url_request/test_url_fetcher_factory.h"
+#include "net/url_request/url_fetcher_impl.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace chromeos {
+
+namespace {
+
+const char kOEMWallpaperURL[] = "http://somedomain.com/image.png";
+
+const char kServicesManifest[] =
+    "{"
+    "  \"version\": \"1.0\","
+    "  \"default_wallpaper\": \"http://somedomain.com/image.png\",\n"
+    "  \"default_apps\": [\n"
+    "    \"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\",\n"
+    "    \"bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb\"\n"
+    "  ],\n"
+    "  \"localized_content\": {\n"
+    "    \"en-US\": {\n"
+    "      \"default_apps_folder_name\": \"EN-US OEM Name\"\n"
+    "    },\n"
+    "    \"en\": {\n"
+    "      \"default_apps_folder_name\": \"EN OEM Name\"\n"
+    "    },\n"
+    "    \"default\": {\n"
+    "      \"default_apps_folder_name\": \"Default OEM Name\"\n"
+    "    }\n"
+    "  }\n"
+    "}";
+
+// Expected minimal wallpaper download retry interval in milliseconds.
+const int kDownloadRetryIntervalMS = 100;
+
+class TestWallpaperObserver : public WallpaperManager::Observer {
+ public:
+  explicit TestWallpaperObserver(WallpaperManager* wallpaper_manager)
+      : finished_(false),
+        wallpaper_manager_(wallpaper_manager) {
+    DCHECK(wallpaper_manager_);
+    wallpaper_manager_->AddObserver(this);
+  }
+
+  virtual ~TestWallpaperObserver() {
+    wallpaper_manager_->RemoveObserver(this);
+  }
+
+  virtual void OnWallpaperAnimationFinished(const std::string&) OVERRIDE {
+    finished_ = true;
+    base::MessageLoop::current()->Quit();
+  }
+
+  void WaitForWallpaperAnimationFinished() {
+    while (!finished_)
+      base::RunLoop().Run();
+  }
+
+ private:
+  bool finished_;
+  WallpaperManager* wallpaper_manager_;
+
+  DISALLOW_COPY_AND_ASSIGN(TestWallpaperObserver);
+};
+
+}  // namespace
+
+// This is helper class for net::FakeURLFetcherFactory.
+class TestWallpaperImageURLFetcherCallback {
+ public:
+  TestWallpaperImageURLFetcherCallback(
+      const GURL& url,
+      const size_t require_retries,
+      const std::vector<unsigned char>& jpeg_data_raw)
+      : url_(url),
+        require_retries_(require_retries),
+        factory_(NULL) {
+    jpeg_data_.resize(jpeg_data_raw.size());
+    std::copy(jpeg_data_raw.begin(), jpeg_data_raw.end(), jpeg_data_.begin());
+  }
+
+  scoped_ptr<net::FakeURLFetcher> CreateURLFetcher(
+      const GURL& url,
+      net::URLFetcherDelegate* delegate,
+      const std::string& response_data,
+      net::HttpStatusCode response_code,
+      net::URLRequestStatus::Status status) {
+    chromeos::ServicesCustomizationDocument* customization =
+        chromeos::ServicesCustomizationDocument::GetInstance();
+    customization->wallpaper_downloader_for_testing()
+        ->set_retry_delay_for_testing(
+            base::TimeDelta::FromMilliseconds(kDownloadRetryIntervalMS));
+
+    attempts_.push_back(base::TimeTicks::Now());
+    if (attempts_.size() > 1) {
+      const int retry = num_attempts() - 1;
+      const base::TimeDelta current_delay =
+          customization->wallpaper_downloader_for_testing()
+              ->get_retry_current_delay_for_testing();
+      const double base_interval = base::TimeDelta::FromMilliseconds(
+                                       kDownloadRetryIntervalMS).InSecondsF();
+      EXPECT_GE(current_delay,
+                base::TimeDelta::FromSecondsD(base_interval * retry * retry))
+          << "Retry too fast. Actual interval " << current_delay.InSecondsF()
+          << " seconds, but expected at least " << base_interval
+          << " * (retry=" << retry
+          << " * retry)= " << base_interval * retry * retry << " seconds.";
+    }
+    if (attempts_.size() > require_retries_) {
+      response_code = net::HTTP_OK;
+      status = net::URLRequestStatus::SUCCESS;
+      factory_->SetFakeResponse(url, response_data, response_code, status);
+    }
+    scoped_ptr<net::FakeURLFetcher> fetcher(new net::FakeURLFetcher(
+        url, delegate, response_data, response_code, status));
+    scoped_refptr<net::HttpResponseHeaders> download_headers =
+        new net::HttpResponseHeaders(std::string());
+    download_headers->AddHeader("Content-Type: image/jpeg");
+    fetcher->set_response_headers(download_headers);
+    return fetcher.Pass();
+  }
+
+  void Initialize(net::FakeURLFetcherFactory* factory) {
+    factory_ = factory;
+    factory_->SetFakeResponse(url_,
+                              jpeg_data_,
+                              net::HTTP_INTERNAL_SERVER_ERROR,
+                              net::URLRequestStatus::FAILED);
+  }
+
+  size_t num_attempts() const { return attempts_.size(); }
+
+ private:
+  const GURL url_;
+  // Respond with OK on required retry attempt.
+  const size_t require_retries_;
+  net::FakeURLFetcherFactory* factory_;
+  std::vector<base::TimeTicks> attempts_;
+  std::string jpeg_data_;
+
+  DISALLOW_COPY_AND_ASSIGN(TestWallpaperImageURLFetcherCallback);
+};
+
+// This implements fake remote source for wallpaper image.
+// JPEG image is created here and served to CustomizationWallpaperDownloader
+// via net::FakeURLFetcher.
+class WallpaperImageFetcherFactory {
+ public:
+  WallpaperImageFetcherFactory(const GURL& url,
+                               int width,
+                               int height,
+                               SkColor color,
+                               const size_t require_retries) {
+    // ASSERT_TRUE() cannot be directly used in constructor.
+    Initialize(url, width, height, color, require_retries);
+  }
+
+  ~WallpaperImageFetcherFactory() {
+    fetcher_factory_.reset();
+    net::URLFetcherImpl::set_factory(fallback_fetcher_factory_.get());
+    fallback_fetcher_factory_.reset();
+  }
+
+  size_t num_attempts() const { return url_callback_->num_attempts(); }
+
+ private:
+  void Initialize(const GURL& url,
+                  int width,
+                  int height,
+                  SkColor color,
+                  const size_t require_retries) {
+    std::vector<unsigned char> oem_wallpaper_;
+    ASSERT_TRUE(wallpaper_manager_test_utils::CreateJPEGImage(
+        width, height, color, &oem_wallpaper_));
+
+    url_callback_.reset(new TestWallpaperImageURLFetcherCallback(
+        url, require_retries, oem_wallpaper_));
+    fallback_fetcher_factory_.reset(new net::TestURLFetcherFactory);
+    net::URLFetcherImpl::set_factory(NULL);
+    fetcher_factory_.reset(new net::FakeURLFetcherFactory(
+        fallback_fetcher_factory_.get(),
+        base::Bind(&TestWallpaperImageURLFetcherCallback::CreateURLFetcher,
+                   base::Unretained(url_callback_.get()))));
+    url_callback_->Initialize(fetcher_factory_.get());
+  }
+
+  scoped_ptr<TestWallpaperImageURLFetcherCallback> url_callback_;
+
+  // Use a test factory as a fallback so we don't have to deal with other
+  // requests.
+  scoped_ptr<net::TestURLFetcherFactory> fallback_fetcher_factory_;
+  scoped_ptr<net::FakeURLFetcherFactory> fetcher_factory_;
+
+  DISALLOW_COPY_AND_ASSIGN(WallpaperImageFetcherFactory);
+};
+
+class CustomizationWallpaperDownloaderBrowserTest
+    : public InProcessBrowserTest {
+ public:
+  CustomizationWallpaperDownloaderBrowserTest()
+      : controller_(NULL),
+        local_state_(NULL) {
+  }
+
+  virtual ~CustomizationWallpaperDownloaderBrowserTest() {}
+
+  virtual void SetUpOnMainThread() OVERRIDE {
+    controller_ = ash::Shell::GetInstance()->desktop_background_controller();
+    local_state_ = g_browser_process->local_state();
+  }
+
+  virtual void SetUpCommandLine(CommandLine* command_line) OVERRIDE {
+    command_line->AppendSwitch(chromeos::switches::kLoginManager);
+    command_line->AppendSwitchASCII(chromeos::switches::kLoginProfile, "user");
+  }
+
+  virtual void CleanUpOnMainThread() OVERRIDE { controller_ = NULL; }
+
+ protected:
+  void CreateCmdlineWallpapers() {
+    cmdline_wallpaper_dir_.reset(new base::ScopedTempDir);
+    ASSERT_TRUE(cmdline_wallpaper_dir_->CreateUniqueTempDir());
+    wallpaper_manager_test_utils::CreateCmdlineWallpapers(
+        *cmdline_wallpaper_dir_, &wallpaper_manager_command_line_);
+  }
+
+  ash::DesktopBackgroundController* controller_;
+  PrefService* local_state_;
+  scoped_ptr<base::CommandLine> wallpaper_manager_command_line_;
+
+  // Directory created by CreateCmdlineWallpapersAndSetFlags() to store default
+  // wallpaper images.
+  scoped_ptr<base::ScopedTempDir> cmdline_wallpaper_dir_;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(CustomizationWallpaperDownloaderBrowserTest);
+};
+
+IN_PROC_BROWSER_TEST_F(CustomizationWallpaperDownloaderBrowserTest,
+                       OEMWallpaperIsPresent) {
+  CreateCmdlineWallpapers();
+  WallpaperManager::Get()->SetDefaultWallpaperNow(std::string());
+  wallpaper_manager_test_utils::WaitAsyncWallpaperLoadFinished();
+  EXPECT_TRUE(wallpaper_manager_test_utils::ImageIsNearColor(
+      controller_->GetWallpaper(),
+      wallpaper_manager_test_utils::kSmallDefaultWallpaperColor));
+
+  WallpaperImageFetcherFactory url_factory(
+      GURL(kOEMWallpaperURL),
+      wallpaper_manager_test_utils::kWallpaperSize,
+      wallpaper_manager_test_utils::kWallpaperSize,
+      wallpaper_manager_test_utils::kCustomWallpaperColor,
+      0 /* require_retries */);
+
+  TestWallpaperObserver observer(WallpaperManager::Get());
+  chromeos::ServicesCustomizationDocument* customization =
+      chromeos::ServicesCustomizationDocument::GetInstance();
+  EXPECT_TRUE(
+      customization->LoadManifestFromString(std::string(kServicesManifest)));
+
+  observer.WaitForWallpaperAnimationFinished();
+  EXPECT_TRUE(wallpaper_manager_test_utils::ImageIsNearColor(
+      controller_->GetWallpaper(),
+      wallpaper_manager_test_utils::kCustomWallpaperColor));
+  EXPECT_EQ(1U, url_factory.num_attempts());
+}
+
+IN_PROC_BROWSER_TEST_F(CustomizationWallpaperDownloaderBrowserTest,
+                       OEMWallpaperRetryFetch) {
+  CreateCmdlineWallpapers();
+  WallpaperManager::Get()->SetDefaultWallpaperNow(std::string());
+  wallpaper_manager_test_utils::WaitAsyncWallpaperLoadFinished();
+  EXPECT_TRUE(wallpaper_manager_test_utils::ImageIsNearColor(
+      controller_->GetWallpaper(),
+      wallpaper_manager_test_utils::kSmallDefaultWallpaperColor));
+
+  WallpaperImageFetcherFactory url_factory(
+      GURL(kOEMWallpaperURL),
+      wallpaper_manager_test_utils::kWallpaperSize,
+      wallpaper_manager_test_utils::kWallpaperSize,
+      wallpaper_manager_test_utils::kCustomWallpaperColor,
+      1 /* require_retries */);
+
+  TestWallpaperObserver observer(WallpaperManager::Get());
+  chromeos::ServicesCustomizationDocument* customization =
+      chromeos::ServicesCustomizationDocument::GetInstance();
+  EXPECT_TRUE(
+      customization->LoadManifestFromString(std::string(kServicesManifest)));
+
+  observer.WaitForWallpaperAnimationFinished();
+  EXPECT_TRUE(wallpaper_manager_test_utils::ImageIsNearColor(
+      controller_->GetWallpaper(),
+      wallpaper_manager_test_utils::kCustomWallpaperColor));
+
+  EXPECT_EQ(2U, url_factory.num_attempts());
+}
+
+}  // namespace chromeos