1// Copyright (c) 2011 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/message_loop.h"
6#include "base/path_service.h"
7#include "chrome/browser/extensions/image_loading_tracker.h"
8#include "chrome/common/chrome_paths.h"
9#include "chrome/common/extensions/extension.h"
10#include "chrome/common/extensions/extension_icon_set.h"
11#include "chrome/common/extensions/extension_resource.h"
12#include "content/browser/browser_thread.h"
13#include "content/common/json_value_serializer.h"
14#include "content/common/notification_service.h"
15#include "content/common/notification_type.h"
16#include "testing/gtest/include/gtest/gtest.h"
17#include "third_party/skia/include/core/SkBitmap.h"
18#include "ui/gfx/size.h"
19
20class ImageLoadingTrackerTest : public testing::Test,
21                                public ImageLoadingTracker::Observer {
22 public:
23  ImageLoadingTrackerTest()
24      : image_loaded_count_(0),
25        quit_in_image_loaded_(false),
26        ui_thread_(BrowserThread::UI, &ui_loop_),
27        file_thread_(BrowserThread::FILE),
28        io_thread_(BrowserThread::IO) {
29  }
30
31  virtual void OnImageLoaded(SkBitmap* image, const ExtensionResource& resource,
32                             int index) {
33    image_loaded_count_++;
34    if (quit_in_image_loaded_)
35      MessageLoop::current()->Quit();
36    if (image)
37      image_ = *image;
38    else
39      image_.reset();
40  }
41
42  void WaitForImageLoad() {
43    quit_in_image_loaded_ = true;
44    MessageLoop::current()->Run();
45    quit_in_image_loaded_ = false;
46  }
47
48  int image_loaded_count() {
49    int result = image_loaded_count_;
50    image_loaded_count_ = 0;
51    return result;
52  }
53
54  scoped_refptr<Extension> CreateExtension() {
55    // Create and load an extension.
56    FilePath test_file;
57    if (!PathService::Get(chrome::DIR_TEST_DATA, &test_file)) {
58      EXPECT_FALSE(true);
59      return NULL;
60    }
61    test_file = test_file.AppendASCII("extensions")
62                         .AppendASCII("image_loading_tracker");
63    int error_code = 0;
64    std::string error;
65    JSONFileValueSerializer serializer(test_file.AppendASCII("app.json"));
66    scoped_ptr<DictionaryValue> valid_value(
67        static_cast<DictionaryValue*>(serializer.Deserialize(&error_code,
68                                                             &error)));
69    EXPECT_EQ(0, error_code) << error;
70    if (error_code != 0)
71      return NULL;
72
73    EXPECT_TRUE(valid_value.get());
74    if (!valid_value.get())
75      return NULL;
76
77    return Extension::Create(test_file, Extension::INVALID, *valid_value,
78        Extension::STRICT_ERROR_CHECKS, &error);
79  }
80
81  SkBitmap image_;
82
83 private:
84  virtual void SetUp() {
85    file_thread_.Start();
86    io_thread_.Start();
87  }
88
89  int image_loaded_count_;
90  bool quit_in_image_loaded_;
91  MessageLoop ui_loop_;
92  BrowserThread ui_thread_;
93  BrowserThread file_thread_;
94  BrowserThread io_thread_;
95};
96
97// Tests asking ImageLoadingTracker to cache pushes the result to the Extension.
98TEST_F(ImageLoadingTrackerTest, Cache) {
99  scoped_refptr<Extension> extension(CreateExtension());
100  ASSERT_TRUE(extension.get() != NULL);
101
102  ExtensionResource image_resource =
103      extension->GetIconResource(Extension::EXTENSION_ICON_SMALLISH,
104                                 ExtensionIconSet::MATCH_EXACTLY);
105  gfx::Size max_size(Extension::EXTENSION_ICON_SMALLISH,
106                     Extension::EXTENSION_ICON_SMALLISH);
107  ImageLoadingTracker loader(static_cast<ImageLoadingTracker::Observer*>(this));
108  loader.LoadImage(extension.get(),
109                   image_resource,
110                   max_size,
111                   ImageLoadingTracker::CACHE);
112
113  // The image isn't cached, so we should not have received notification.
114  EXPECT_EQ(0, image_loaded_count());
115
116  WaitForImageLoad();
117
118  // We should have gotten the image.
119  EXPECT_EQ(1, image_loaded_count());
120
121  // Check that the image was loaded.
122  EXPECT_EQ(Extension::EXTENSION_ICON_SMALLISH, image_.width());
123
124  // The image should be cached in the Extension.
125  EXPECT_TRUE(extension->HasCachedImage(image_resource, max_size));
126
127  // Make sure the image is in the extension.
128  EXPECT_EQ(Extension::EXTENSION_ICON_SMALLISH,
129            extension->GetCachedImage(image_resource, max_size).width());
130
131  // Ask the tracker for the image again, this should call us back immediately.
132  loader.LoadImage(extension.get(),
133                   image_resource,
134                   max_size,
135                   ImageLoadingTracker::CACHE);
136  // We should have gotten the image.
137  EXPECT_EQ(1, image_loaded_count());
138
139  // Check that the image was loaded.
140  EXPECT_EQ(Extension::EXTENSION_ICON_SMALLISH, image_.width());
141}
142
143// Tests deleting an extension while waiting for the image to load doesn't cause
144// problems.
145TEST_F(ImageLoadingTrackerTest, DeleteExtensionWhileWaitingForCache) {
146  scoped_refptr<Extension> extension(CreateExtension());
147  ASSERT_TRUE(extension.get() != NULL);
148
149  ExtensionResource image_resource =
150      extension->GetIconResource(Extension::EXTENSION_ICON_SMALLISH,
151                                 ExtensionIconSet::MATCH_EXACTLY);
152  ImageLoadingTracker loader(static_cast<ImageLoadingTracker::Observer*>(this));
153  loader.LoadImage(extension.get(),
154                   image_resource,
155                   gfx::Size(Extension::EXTENSION_ICON_SMALLISH,
156                             Extension::EXTENSION_ICON_SMALLISH),
157                   ImageLoadingTracker::CACHE);
158
159  // The image isn't cached, so we should not have received notification.
160  EXPECT_EQ(0, image_loaded_count());
161
162  // Send out notification the extension was uninstalled.
163  UnloadedExtensionInfo details(extension.get(),
164                                UnloadedExtensionInfo::UNINSTALL);
165  NotificationService::current()->Notify(
166      NotificationType::EXTENSION_UNLOADED,
167      NotificationService::AllSources(),
168      Details<UnloadedExtensionInfo>(&details));
169
170  // Chuck the extension, that way if anyone tries to access it we should crash
171  // or get valgrind errors.
172  extension = NULL;
173
174  WaitForImageLoad();
175
176  // Even though we deleted the extension, we should still get the image.
177  // We should still have gotten the image.
178  EXPECT_EQ(1, image_loaded_count());
179
180  // Check that the image was loaded.
181  EXPECT_EQ(Extension::EXTENSION_ICON_SMALLISH, image_.width());
182}
183