Change browser/page action default icon defined in manifest to support hidpi.

chrome/browser/extensions/extension_action_icon_factory_unittest.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 "chrome/browser/extensions/extension_action_icon_factory.h"
+
+#include "base/json/json_file_value_serializer.h"
+#include "base/message_loop.h"
+#include "base/path_service.h"
+#include "chrome/common/chrome_paths.h"
+#include "chrome/common/extensions/extension.h"
+#include "chrome/common/extensions/extension_action.h"
+#include "content/public/test/test_browser_thread.h"
+#include "grit/theme_resources.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "ui/base/resource/resource_bundle.h"
+#include "ui/gfx/image/image_skia.h"
+#include "ui/gfx/skia_util.h"
+
+using content::BrowserThread;
+using extensions::Extension;
+
+namespace {
+
+bool ImageRepsAreEqual(const gfx::ImageSkiaRep& image_rep1,
+                       const gfx::ImageSkiaRep& image_rep2) {
+  return image_rep1.scale_factor() == image_rep2.scale_factor() &&
+         gfx::BitmapsAreEqual(image_rep1.sk_bitmap(), image_rep2.sk_bitmap());
+}
+
+gfx::ImageSkiaRep CreateBlankRep(int size_dip, ui::ScaleFactor scale_factor) {
+    SkBitmap bitmap;
+    const float scale = ui::GetScaleFactorScale(scale_factor);
+    bitmap.setConfig(SkBitmap::kARGB_8888_Config,
+                     static_cast<int>(size_dip * scale),
+                     static_cast<int>(size_dip * scale));
+    bitmap.allocPixels();
+    bitmap.eraseColor(SkColorSetARGB(0, 0, 0, 0));
+    return gfx::ImageSkiaRep(bitmap, scale_factor);
+}
+
+class ExtensionActionIconFactoryTest
+    : public testing::Test,
+      public ExtensionActionIconFactory::Observer {
+ public:
+  ExtensionActionIconFactoryTest()
+      : quit_in_icon_updated_(false),
+        ui_thread_(BrowserThread::UI, &ui_loop_),
+        file_thread_(BrowserThread::FILE),
+        io_thread_(BrowserThread::IO) {
+  }
+
+  virtual ~ExtensionActionIconFactoryTest() {}
+
+  void WaitForIconUpdate() {
+    quit_in_icon_updated_ = true;
+    MessageLoop::current()->Run();
+    quit_in_icon_updated_ = false;
+  }
+
+  scoped_refptr<Extension> CreateExtension(const char* name,
+                                           Extension::Location location) {
+    // Create and load an extension.
+    FilePath test_file;
+    if (!PathService::Get(chrome::DIR_TEST_DATA, &test_file)) {
+      EXPECT_FALSE(true);
+      return NULL;
+    }
+    test_file = test_file.AppendASCII("extensions").AppendASCII(name);
+    int error_code = 0;
+    std::string error;
+    JSONFileValueSerializer serializer(test_file.AppendASCII("app.json"));
+    scoped_ptr<DictionaryValue> valid_value(
+        static_cast<DictionaryValue*>(serializer.Deserialize(&error_code,
+                                                             &error)));
+    EXPECT_EQ(0, error_code) << error;
+    if (error_code != 0)
+      return NULL;
+
+    EXPECT_TRUE(valid_value.get());
+    if (!valid_value.get())
+      return NULL;
+
+    return Extension::Create(test_file, location, *valid_value,
+                             Extension::NO_FLAGS, &error);
+  }
+
+  // testing::Test overrides:
+  virtual void SetUp() OVERRIDE {
+    file_thread_.Start();
+    io_thread_.Start();
+  }
+
+  // ExtensionActionIconFactory::Observer overrides:
+  virtual void OnIconUpdated() OVERRIDE {
+    if (quit_in_icon_updated_)
+      MessageLoop::current()->Quit();
+  }
+
+  gfx::ImageSkia GetDefaultIcon() {
+    return *ui::ResourceBundle::GetSharedInstance().GetImageSkiaNamed(
+        IDR_EXTENSIONS_FAVICON);
+  }
+
+ private:
+  bool quit_in_icon_updated_;
+  MessageLoop ui_loop_;
+  content::TestBrowserThread ui_thread_;
+  content::TestBrowserThread file_thread_;
+  content::TestBrowserThread io_thread_;
+
+  DISALLOW_COPY_AND_ASSIGN(ExtensionActionIconFactoryTest);
+};
+
+TEST_F(ExtensionActionIconFactoryTest, Basic) {
+  scoped_refptr<Extension> extension(CreateExtension(
+      "extension_icon_image", Extension::INVALID));
+  ASSERT_TRUE(extension.get() != NULL);
+
+  gfx::ImageSkia default_icon = GetDefaultIcon();
+
+  ExtensionActionIconFactory icon_factory(extension, this);
+
+  gfx::ImageSkia icon = icon_factory.GetIcon(&extension->icons(),
+                                             gfx::Size(19, 19));
+
+  // Initially icon factory should return transparent image because icon will be
+  // loaded asynchronously.
+  EXPECT_TRUE(ImageRepsAreEqual(
+      CreateBlankRep(19, ui::SCALE_FACTOR_100P),
+      icon.GetRepresentation(ui::SCALE_FACTOR_100P)));
+
+  WaitForIconUpdate();
+
+  // The icon should have changed.
+  EXPECT_FALSE(ImageRepsAreEqual(
+      CreateBlankRep(19, ui::SCALE_FACTOR_100P),
+      icon.GetRepresentation(ui::SCALE_FACTOR_100P)));
+
+  gfx::ImageSkia updated_icon = icon_factory.GetIcon(&extension->icons(),
+                                                     gfx::Size(19, 19));
+
+  // Icon_factory should return the same icon as before.
+  EXPECT_TRUE(ImageRepsAreEqual(
+      icon.GetRepresentation(ui::SCALE_FACTOR_100P),
+      updated_icon.GetRepresentation(ui::SCALE_FACTOR_100P)));
+
+  ExtensionIconSet invalid_icon_set;
+  invalid_icon_set.Add(19, "invalid.png");
+  icon = icon_factory.GetIcon(&invalid_icon_set, gfx::Size(19, 19));
+
+  // Icon set has changed, so we should get a transparent icon again.
+  EXPECT_TRUE(ImageRepsAreEqual(
+      CreateBlankRep(19, ui::SCALE_FACTOR_100P),
+      icon.GetRepresentation(ui::SCALE_FACTOR_100P)));
+
+  WaitForIconUpdate();
+
+  // Icon set keeps nonexisting resource, so default icon should be loaded
+  // insted.
+  EXPECT_TRUE(ImageRepsAreEqual(
+      default_icon.GetRepresentation(ui::SCALE_FACTOR_100P),
+      icon.GetRepresentation(ui::SCALE_FACTOR_100P)));
+};
+
+}  // namespace