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      1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #include "base/json/json_file_value_serializer.h"
      6 #include "base/message_loop/message_loop.h"
      7 #include "base/path_service.h"
      8 #include "base/values.h"
      9 #include "chrome/browser/extensions/extension_icon_manager.h"
     10 #include "chrome/common/chrome_paths.h"
     11 #include "chrome/common/extensions/extension.h"
     12 #include "chrome/test/base/testing_profile.h"
     13 #include "content/public/test/test_browser_thread.h"
     14 #include "extensions/common/id_util.h"
     15 #include "testing/gtest/include/gtest/gtest.h"
     16 #include "ui/gfx/skia_util.h"
     17 
     18 using content::BrowserThread;
     19 using extensions::Extension;
     20 using extensions::Manifest;
     21 
     22 // Our test class that takes care of managing the necessary threads for loading
     23 // extension icons, and waiting for those loads to happen.
     24 class ExtensionIconManagerTest : public testing::Test {
     25  public:
     26   ExtensionIconManagerTest() :
     27       unwaited_image_loads_(0),
     28       waiting_(false),
     29       ui_thread_(BrowserThread::UI, &ui_loop_),
     30       file_thread_(BrowserThread::FILE),
     31       io_thread_(BrowserThread::IO) {}
     32 
     33   virtual ~ExtensionIconManagerTest() {}
     34 
     35   void ImageLoadObserved() {
     36     unwaited_image_loads_++;
     37     if (waiting_) {
     38       base::MessageLoop::current()->Quit();
     39     }
     40   }
     41 
     42   void WaitForImageLoad() {
     43     if (unwaited_image_loads_ == 0) {
     44       waiting_ = true;
     45       base::MessageLoop::current()->Run();
     46       waiting_ = false;
     47     }
     48     ASSERT_GT(unwaited_image_loads_, 0);
     49     unwaited_image_loads_--;
     50   }
     51 
     52  private:
     53   virtual void SetUp() {
     54     file_thread_.Start();
     55     io_thread_.Start();
     56   }
     57 
     58   // The number of observed image loads that have not been waited for.
     59   int unwaited_image_loads_;
     60 
     61   // Whether we are currently waiting for an image load.
     62   bool waiting_;
     63 
     64   base::MessageLoop ui_loop_;
     65   content::TestBrowserThread ui_thread_;
     66   content::TestBrowserThread file_thread_;
     67   content::TestBrowserThread io_thread_;
     68 
     69   DISALLOW_COPY_AND_ASSIGN(ExtensionIconManagerTest);
     70 };
     71 
     72 // This is a specialization of ExtensionIconManager, with a special override to
     73 // call back to the test when an icon has completed loading.
     74 class TestIconManager : public ExtensionIconManager {
     75  public:
     76   explicit TestIconManager(ExtensionIconManagerTest* test) : test_(test) {}
     77   virtual ~TestIconManager() {}
     78 
     79   // Overrides the ImageLoader callback, and calls through to the base class'
     80   // implementation. Then it lets the test know that an image load was observed.
     81   virtual void OnImageLoaded(const std::string& extension_id,
     82                              const gfx::Image& image) OVERRIDE {
     83     ExtensionIconManager::OnImageLoaded(extension_id, image);
     84     test_->ImageLoadObserved();
     85   }
     86 
     87  private:
     88   ExtensionIconManagerTest* test_;
     89 
     90   DISALLOW_COPY_AND_ASSIGN(TestIconManager);
     91 };
     92 
     93 // Returns the default icon that ExtensionIconManager gives when an extension
     94 // doesn't have an icon.
     95 SkBitmap GetDefaultIcon() {
     96   std::string dummy_id = extensions::id_util::GenerateId("whatever");
     97   ExtensionIconManager manager;
     98   return manager.GetIcon(dummy_id);
     99 }
    100 
    101 // Tests loading an icon for an extension, removing it, then re-loading it.
    102 TEST_F(ExtensionIconManagerTest, LoadRemoveLoad) {
    103   scoped_ptr<Profile> profile(new TestingProfile());
    104   SkBitmap default_icon = GetDefaultIcon();
    105 
    106   base::FilePath test_dir;
    107   ASSERT_TRUE(PathService::Get(chrome::DIR_TEST_DATA, &test_dir));
    108   base::FilePath manifest_path = test_dir.AppendASCII(
    109       "extensions/image_loading_tracker/app.json");
    110 
    111   JSONFileValueSerializer serializer(manifest_path);
    112   scoped_ptr<DictionaryValue> manifest(
    113       static_cast<DictionaryValue*>(serializer.Deserialize(NULL, NULL)));
    114   ASSERT_TRUE(manifest.get() != NULL);
    115 
    116   std::string error;
    117   scoped_refptr<Extension> extension(Extension::Create(
    118       manifest_path.DirName(), Manifest::INVALID_LOCATION, *manifest.get(),
    119       Extension::NO_FLAGS, &error));
    120   ASSERT_TRUE(extension.get());
    121   TestIconManager icon_manager(this);
    122 
    123   // Load the icon and grab the bitmap.
    124   icon_manager.LoadIcon(profile.get(), extension.get());
    125   WaitForImageLoad();
    126   SkBitmap first_icon = icon_manager.GetIcon(extension->id());
    127   EXPECT_FALSE(gfx::BitmapsAreEqual(first_icon, default_icon));
    128 
    129   // Remove the icon from the manager.
    130   icon_manager.RemoveIcon(extension->id());
    131 
    132   // Now re-load the icon - we should get the same result bitmap (and not the
    133   // default icon).
    134   icon_manager.LoadIcon(profile.get(), extension.get());
    135   WaitForImageLoad();
    136   SkBitmap second_icon = icon_manager.GetIcon(extension->id());
    137   EXPECT_FALSE(gfx::BitmapsAreEqual(second_icon, default_icon));
    138 
    139   EXPECT_TRUE(gfx::BitmapsAreEqual(first_icon, second_icon));
    140 }
    141 
    142 #if defined(FILE_MANAGER_EXTENSION)
    143 // Tests loading an icon for a component extension.
    144 TEST_F(ExtensionIconManagerTest, LoadComponentExtensionResource) {
    145   scoped_ptr<Profile> profile(new TestingProfile());
    146   SkBitmap default_icon = GetDefaultIcon();
    147 
    148   base::FilePath test_dir;
    149   ASSERT_TRUE(PathService::Get(chrome::DIR_TEST_DATA, &test_dir));
    150   base::FilePath manifest_path = test_dir.AppendASCII(
    151       "extensions/file_manager/app.json");
    152 
    153   JSONFileValueSerializer serializer(manifest_path);
    154   scoped_ptr<DictionaryValue> manifest(
    155       static_cast<DictionaryValue*>(serializer.Deserialize(NULL, NULL)));
    156   ASSERT_TRUE(manifest.get() != NULL);
    157 
    158   std::string error;
    159   scoped_refptr<Extension> extension(Extension::Create(
    160       manifest_path.DirName(), Manifest::COMPONENT, *manifest.get(),
    161       Extension::NO_FLAGS, &error));
    162   ASSERT_TRUE(extension.get());
    163 
    164   TestIconManager icon_manager(this);
    165   // Load the icon and grab the bitmap.
    166   icon_manager.LoadIcon(profile.get(), extension.get());
    167   WaitForImageLoad();
    168   SkBitmap first_icon = icon_manager.GetIcon(extension->id());
    169   EXPECT_FALSE(gfx::BitmapsAreEqual(first_icon, default_icon));
    170 
    171   // Remove the icon from the manager.
    172   icon_manager.RemoveIcon(extension->id());
    173 
    174   // Now re-load the icon - we should get the same result bitmap (and not the
    175   // default icon).
    176   icon_manager.LoadIcon(profile.get(), extension.get());
    177   WaitForImageLoad();
    178   SkBitmap second_icon = icon_manager.GetIcon(extension->id());
    179   EXPECT_FALSE(gfx::BitmapsAreEqual(second_icon, default_icon));
    180 
    181   EXPECT_TRUE(gfx::BitmapsAreEqual(first_icon, second_icon));
    182 }
    183 #endif
    184