Use ByteStream in downloads system to decouple source and sink.

content/test/test_file_error_injector.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 "content/public/test/test_file_error_injector.h"
 
 #include <vector>
 
 #include "base/compiler_specific.h"
 #include "base/logging.h"
 #include "content/browser/download/download_create_info.h"
 #include "content/browser/download/download_file_impl.h"
 #include "content/browser/download/download_file_manager.h"
 #include "content/browser/power_save_blocker.h"
 #include "content/browser/renderer_host/resource_dispatcher_host_impl.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/download_id.h"
 #include "googleurl/src/gurl.h"
 
+namespace content {
+class ByteStreamReader;
+}
+
 namespace {
 
 DownloadFileManager* GetDownloadFileManager() {
   content::ResourceDispatcherHostImpl* rdh =
       content::ResourceDispatcherHostImpl::Get();
   DCHECK(rdh != NULL);
   return rdh->download_file_manager();
 }
 
 // A class that performs file operations and injects errors.
 class DownloadFileWithErrors: public DownloadFileImpl {
  public:
   typedef base::Callback<void(const GURL& url, content::DownloadId id)>
       ConstructionCallback;
   typedef base::Callback<void(const GURL& url)> DestructionCallback;
 
   DownloadFileWithErrors(
       const DownloadCreateInfo* info,
+      scoped_ptr<content::ByteStreamReader> stream,
       DownloadRequestHandleInterface* request_handle,
       content::DownloadManager* download_manager,
       bool calculate_hash,
       const net::BoundNetLog& bound_net_log,
       const content::TestFileErrorInjector::FileErrorInfo& error_info,
       const ConstructionCallback& ctor_callback,
       const DestructionCallback& dtor_callback);
 
   ~DownloadFileWithErrors();
 
@@ skipping 18 matching lines @@
   // Count per operation.  0-based.
   std::map<content::TestFileErrorInjector::FileOperationCode, int>
       operation_counter_;
 
   // Callback for destruction.
   DestructionCallback destruction_callback_;
 };
 
 DownloadFileWithErrors::DownloadFileWithErrors(
     const DownloadCreateInfo* info,
+    scoped_ptr<content::ByteStreamReader> stream,
     DownloadRequestHandleInterface* request_handle,
     content::DownloadManager* download_manager,
     bool calculate_hash,
     const net::BoundNetLog& bound_net_log,
     const content::TestFileErrorInjector::FileErrorInfo& error_info,
     const ConstructionCallback& ctor_callback,
     const DestructionCallback& dtor_callback)
         : DownloadFileImpl(info,
+                           stream.Pass(),
                            request_handle,
                            download_manager,
                            calculate_hash,
                            scoped_ptr<PowerSaveBlocker>(NULL).Pass(),
                            bound_net_log),
           source_url_(info->url()),
           error_info_(error_info),
           destruction_callback_(dtor_callback) {
   ctor_callback.Run(source_url_, info->download_id);
 }
@@ skipping 56 matching lines @@
  public:
 
   DownloadFileWithErrorsFactory(
       const DownloadFileWithErrors::ConstructionCallback& ctor_callback,
       const DownloadFileWithErrors::DestructionCallback& dtor_callback);
   virtual ~DownloadFileWithErrorsFactory();
 
   // DownloadFileFactory interface.
   virtual content::DownloadFile* CreateFile(
       DownloadCreateInfo* info,
+      scoped_ptr<content::ByteStreamReader> stream,
       const DownloadRequestHandle& request_handle,
       content::DownloadManager* download_manager,
       bool calculate_hash,
       const net::BoundNetLog& bound_net_log);
 
   bool AddError(
       const TestFileErrorInjector::FileErrorInfo& error_info);
 
   void ClearErrors();
 
@@ skipping 11 matching lines @@
     const DownloadFileWithErrors::DestructionCallback& dtor_callback)
         : construction_callback_(ctor_callback),
           destruction_callback_(dtor_callback) {
 }
 
 DownloadFileWithErrorsFactory::~DownloadFileWithErrorsFactory() {
 }
 
 content::DownloadFile* DownloadFileWithErrorsFactory::CreateFile(
     DownloadCreateInfo* info,
+    scoped_ptr<content::ByteStreamReader> stream,
     const DownloadRequestHandle& request_handle,
     content::DownloadManager* download_manager,
     bool calculate_hash,
     const net::BoundNetLog& bound_net_log) {
   std::string url = info->url().spec();
 
   if (injected_errors_.find(url) == injected_errors_.end()) {
     // Have to create entry, because FileErrorInfo is not a POD type.
     TestFileErrorInjector::FileErrorInfo err_info = {
       url,
       TestFileErrorInjector::FILE_OPERATION_INITIALIZE,
       -1,
       net::OK
     };
     injected_errors_[url] = err_info;
   }
 
   return new DownloadFileWithErrors(info,
+                                    stream.Pass(),
                                     new DownloadRequestHandle(request_handle),
                                     download_manager,
                                     calculate_hash,
                                     bound_net_log,
                                     injected_errors_[url],
                                     construction_callback_,
                                     destruction_callback_);
 }
 
 bool DownloadFileWithErrorsFactory::AddError(
@@ skipping 193 matching lines @@
     case FILE_OPERATION_RENAME:
       return "RENAME";
     default:
       break;
   }
 
   return "Unknown";
 }
 
 }  // namespace content