AppCaches which belong to hosted apps are not protected from deletion

content/browser/appcache/chrome_appcache_service_unittest.cc

 // Copyright (c) 2011 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 "base/file_util.h"
 #include "base/memory/ref_counted.h"
 #include "base/message_loop.h"
-#include "base/scoped_temp_dir.h"
 #include "chrome/test/testing_browser_process.h"
 #include "chrome/test/testing_browser_process_test.h"
 #include "content/browser/appcache/chrome_appcache_service.h"
 #include "content/browser/browser_thread.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "webkit/appcache/appcache_storage_impl.h"
+#include "webkit/quota/mock_special_storage_policy.h"
+
+#include <set>
 
 namespace {
-const FilePath::CharType kTestingAppCacheDirname[] =
-    FILE_PATH_LITERAL("Application Cache");
+
+// Examples of a protected and an unprotected origin, to be used througout the
+// test.
+const GURL kProtectedOrigin("http://www.protected.com/");
+const GURL kProtectedManifest1("http://www.protected.com/1/cache.manifest");
+const GURL kProtectedManifest2("http://www.protected.com/2/cache.manifest");
+const GURL kNormalOrigin("http://www.normal.com/");
+const GURL kNormalManifest1("http://www.normal.com/1/cache.manifest");
+const GURL kNormalManifest2("http://www.normal.com/2/cache.manifest");
+
+}  // namespace
+
+namespace appcache {
+
+// This subclass overwrites 2 functions (GetAllAppCacheInfo and
+// DeleteAppcachesForOrigin). It enables unit testing the internal logic of
+// ChromeAppCacheInfo (deleting only non-protected origins from the app cache).
+class TestableChromeAppCacheService : public ChromeAppCacheService {
+public:
+  explicit TestableChromeAppCacheService(quota::QuotaManagerProxy* proxy);
+
+  // Mock implementations.
+  virtual void GetAllAppCacheInfo(AppCacheInfoCollection* collection,
+                                  net::CompletionCallback* callback);
+  virtual void DeleteAppCacheGroup(const GURL& origin,
+                                   net::CompletionCallback* callback);
+
+  // Functions for controlling the mock implementations.
+  void set_empty(bool empty);
+  bool GroupDeleted(const GURL& manifest_url);
+
+private:
+  // Helper function for the mock implementation
+  static void DeferredCallCallback(net::CompletionCallback* callback, int rv);
+
+  std::set<GURL> deleted_groups_;
+  bool empty_;
+};
+
+TestableChromeAppCacheService::TestableChromeAppCacheService(
+    quota::QuotaManagerProxy* proxy)
+    : ChromeAppCacheService(proxy), empty_(false) {
 }
 
-namespace appcache {
+void TestableChromeAppCacheService::GetAllAppCacheInfo(
+    AppCacheInfoCollection* collection,
+    net::CompletionCallback* callback) {
+  if (!empty_) {
+    AppCacheInfo info1;
+    info1.manifest_url = kProtectedManifest1;
+    AppCacheInfo info2;
+    info2.manifest_url = kProtectedManifest2;
+    AppCacheInfoVector& info_vector1 =
+        collection->infos_by_origin[kProtectedOrigin];
+    info_vector1.push_back(info1);
+    info_vector1.push_back(info2);
+
+    AppCacheInfo info3;
+    info3.manifest_url = kNormalManifest1;
+    AppCacheInfo info4;
+    info4.manifest_url = kNormalManifest2;
+    AppCacheInfoVector& info_vector2 =
+        collection->infos_by_origin[kNormalOrigin];
+    info_vector2.push_back(info3);
+    info_vector2.push_back(info4);
+  }
+  if (callback)
+    callback->Run(0);
+}
+
+void TestableChromeAppCacheService::DeleteAppCacheGroup(
+    const GURL& manifest_url,
+    net::CompletionCallback* callback) {
+  deleted_groups_.insert(manifest_url);
+  // The callback must be called asynchronously, otherwise the code breaks.
+  // Defer to guarentee async completion.
+  MessageLoop::current()->PostTask(
+      FROM_HERE,
+      NewRunnableFunction(&DeferredCallCallback, callback, 0));
+}
+
+void TestableChromeAppCacheService::set_empty(bool empty) {
+  empty_ = empty;
+}
+
+bool TestableChromeAppCacheService::GroupDeleted(const GURL& manifest_url) {
+  return (deleted_groups_.find(manifest_url) != deleted_groups_.end());
+}
+
+void TestableChromeAppCacheService::DeferredCallCallback(
+    net::CompletionCallback* callback, int rv){
+  callback->Run(rv);
+}
 
 class ChromeAppCacheServiceTest : public TestingBrowserProcessTest {
  public:
   ChromeAppCacheServiceTest()
       : message_loop_(MessageLoop::TYPE_IO),
+        ALLOW_THIS_IN_INITIALIZER_LIST(appcache_cleared_callback_(
+            this, &ChromeAppCacheServiceTest::OnAppCacheCleared)),
+        callback_called_(false),
         db_thread_(BrowserThread::DB, &message_loop_),
         file_thread_(BrowserThread::FILE, &message_loop_),
         cache_thread_(BrowserThread::CACHE, &message_loop_),
         io_thread_(BrowserThread::IO, &message_loop_) {
   }
 
  protected:
   MessageLoop message_loop_;
-  ScopedTempDir temp_dir_;
+  net::CompletionCallbackImpl<ChromeAppCacheServiceTest>
+      appcache_cleared_callback_;
+  bool callback_called_;
 
  private:
+  void OnAppCacheCleared(int rv);
+
   BrowserThread db_thread_;
   BrowserThread file_thread_;
   BrowserThread cache_thread_;
   BrowserThread io_thread_;
 };
 
-TEST_F(ChromeAppCacheServiceTest, KeepOnDestruction) {
-  ASSERT_TRUE(temp_dir_.CreateUniqueTempDir());
-  FilePath appcache_path = temp_dir_.path().Append(kTestingAppCacheDirname);
-  scoped_refptr<ChromeAppCacheService> appcache_service =
-      new ChromeAppCacheService(NULL);
+void ChromeAppCacheServiceTest::OnAppCacheCleared(int rv) {
+  callback_called_ = true;
+}
+
+TEST_F(ChromeAppCacheServiceTest, ClearAppCache) {

[michaeln, 2011/07/14 22:53:16]

And if we don't add the ClearAppCache method, we wouldn't need this test either.

[marja(google), 2011/07/15 11:03:42]

I rewrote the ChromeAppCacheService tests, for testing the "on exit" code path.

+  // Tests ChromeAppCacheService::ClearAppCache(): nonprotected origins should
+  // be deleted an protected origins should not.
+  scoped_refptr<TestableChromeAppCacheService> appcache_service =
+      new TestableChromeAppCacheService(NULL);
   const content::ResourceContext* resource_context = NULL;
+  scoped_refptr<quota::MockSpecialStoragePolicy> mock_policy =
+      new quota::MockSpecialStoragePolicy;
+  mock_policy->AddProtected(kProtectedOrigin);
+  // Passing an empty FilePath is ok; nothing will be saved on the disk during
+  // the test.
   BrowserThread::PostTask(
       BrowserThread::IO, FROM_HERE,
       NewRunnableMethod(appcache_service.get(),
                         &ChromeAppCacheService::InitializeOnIOThread,
-                        appcache_path,
+                        FilePath(),
                         resource_context,
-                        scoped_refptr<quota::SpecialStoragePolicy>(NULL),
-                        false));
-  // Make the steps needed to initialize the storage of AppCache data.
-  message_loop_.RunAllPending();
-  appcache::AppCacheStorageImpl* storage =
-      static_cast<appcache::AppCacheStorageImpl*>(appcache_service->storage());
-  ASSERT_TRUE(storage->database_->db_connection());
-  ASSERT_EQ(1, storage->NewCacheId());
-  storage->disk_cache();
+                        mock_policy));
+  // Spin the message loop so that the initialization really happens.
   message_loop_.RunAllPending();
 
-  ASSERT_TRUE(file_util::PathExists(appcache_path));
-  ASSERT_TRUE(file_util::PathExists(appcache_path.AppendASCII("Index")));
+  appcache_service->ClearAppCache(&appcache_cleared_callback_);
 
-  appcache_service = NULL;
+  // Spin the message loop so that the asynchronous operations (mainly, calling
+  // the callback) happen.
   message_loop_.RunAllPending();
 
-  ASSERT_TRUE(file_util::PathExists(appcache_path));
+  // The appcaches of the protected origin weren't deleted, but the appcache of
+  // the normal origin were.
+  EXPECT_FALSE(appcache_service->GroupDeleted(kProtectedManifest1));
+  EXPECT_FALSE(appcache_service->GroupDeleted(kProtectedManifest2));
+  EXPECT_TRUE(appcache_service->GroupDeleted(kNormalManifest1));
+  EXPECT_TRUE(appcache_service->GroupDeleted(kNormalManifest2));
+  EXPECT_TRUE(callback_called_);
 }
 
-TEST_F(ChromeAppCacheServiceTest, RemoveOnDestruction) {
-  ASSERT_TRUE(temp_dir_.CreateUniqueTempDir());
-  FilePath appcache_path = temp_dir_.path().Append(kTestingAppCacheDirname);
-  scoped_refptr<ChromeAppCacheService> appcache_service =
-      new ChromeAppCacheService(NULL);
+TEST_F(ChromeAppCacheServiceTest, ClearEmptyAppCache) {
+  // Tests ChromeAppCacheService::ClearAppCache(): the callback function should
+  // be called even if there are no appcaches to clear.
+  scoped_refptr<TestableChromeAppCacheService> appcache_service =
+      new TestableChromeAppCacheService(NULL);
+  appcache_service->set_empty(true);
   const content::ResourceContext* resource_context = NULL;
+  scoped_refptr<quota::MockSpecialStoragePolicy> mock_policy =
+      new quota::MockSpecialStoragePolicy;
+  // Passing an empty FilePath is ok; nothing will be saved on the disk during
+  // the test.
   BrowserThread::PostTask(
       BrowserThread::IO, FROM_HERE,
       NewRunnableMethod(appcache_service.get(),
                         &ChromeAppCacheService::InitializeOnIOThread,
-                        appcache_path,
+                        FilePath(),
                         resource_context,
-                        scoped_refptr<quota::SpecialStoragePolicy>(NULL),
-                        true));
-  // Make the steps needed to initialize the storage of AppCache data.
-  message_loop_.RunAllPending();
-  appcache::AppCacheStorageImpl* storage =
-      static_cast<appcache::AppCacheStorageImpl*>(appcache_service->storage());
-  ASSERT_TRUE(storage->database_->db_connection());
-  ASSERT_EQ(1, storage->NewCacheId());
-  storage->disk_cache();
+                        mock_policy));
+  // Spin the message loop so that the initialization really happens.
   message_loop_.RunAllPending();
 
-  ASSERT_TRUE(file_util::PathExists(appcache_path));
-  ASSERT_TRUE(file_util::PathExists(appcache_path.AppendASCII("Index")));
+  appcache_service->ClearAppCache(&appcache_cleared_callback_);
 
-  appcache_service = NULL;
+  // Spin the message loop so that the asynchronous operations (mainly, calling
+  // the callback) happen.
   message_loop_.RunAllPending();
 
-  ASSERT_FALSE(file_util::PathExists(appcache_path));
+  EXPECT_TRUE(callback_called_);
+}
+
+TEST_F(ChromeAppCacheServiceTest, ClearAppCacheWithoutCallback) {
+  // Tests ChromeAppCacheService::ClearAppCache(): passing NULL as callback
+  // should be ok and the functionality should be the same as in the case with
+  // the callback.
+  scoped_refptr<TestableChromeAppCacheService> appcache_service =
+      new TestableChromeAppCacheService(NULL);
+  const content::ResourceContext* resource_context = NULL;
+  scoped_refptr<quota::MockSpecialStoragePolicy> mock_policy =
+      new quota::MockSpecialStoragePolicy;
+  mock_policy->AddProtected(kProtectedOrigin);
+  // Passing an empty FilePath is ok; nothing will be saved on the disk during
+  // the test.
+  BrowserThread::PostTask(
+      BrowserThread::IO, FROM_HERE,
+      NewRunnableMethod(appcache_service.get(),
+                        &ChromeAppCacheService::InitializeOnIOThread,
+                        FilePath(),
+                        resource_context,
+                        mock_policy));
+  // Spin the message loop so that the initialization really happens.
+  message_loop_.RunAllPending();
+
+  appcache_service->ClearAppCache(NULL);
+
+  // Spin the message loop so that the asynchronous operations have a chance to
+  // happen.
+  message_loop_.RunAllPending();
+
+  // The appcaches of the protected origin weren't deleted, but the appcache of
+  // the normal origin were.
+  EXPECT_FALSE(appcache_service->GroupDeleted(kProtectedManifest1));
+  EXPECT_FALSE(appcache_service->GroupDeleted(kProtectedManifest2));
+  EXPECT_TRUE(appcache_service->GroupDeleted(kNormalManifest1));
+  EXPECT_TRUE(appcache_service->GroupDeleted(kNormalManifest2));
 }
 
 }  // namespace appcache