Created a DownloadManager interface, for use in unit tests..

content/browser/download/mock_download_manager.cc

Index: content/browser/download/mock_download_manager.cc
diff --git a/content/browser/download/mock_download_manager.cc b/content/browser/download/mock_download_manager.cc
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+// 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 "content/browser/download/mock_download_manager.h"
+
+MockDownloadManager::MockDownloadManager(
+    content::DownloadManagerDelegate* delegate,
+    DownloadIdFactory* id_factory,
+    DownloadStatusUpdater* updater)
+        : delegate_(delegate), id_factory_(id_factory), updater_(updater) {
+}
+
+// Shutdown the download manager. Must be called before destruction.
+void MockDownloadManager::Shutdown() {
+}
+
+// Return all temporary downloads that reside in the specified directory.
+void MockDownloadManager::GetTemporaryDownloads(const FilePath& dir_path,
+                                   DownloadVector* result) {
+}
+
+// Return all non-temporary downloads in the specified directory that are
+// are in progress or have completed.
+void MockDownloadManager::GetAllDownloads(const FilePath& dir_path,
+                             DownloadVector* result) {
+}
+
+// Returns all non-temporary downloads matching |query|. Empty query matches
+// everything.
+void MockDownloadManager::SearchDownloads(const string16& query,
+                                          DownloadVector* result) {
+}
+
+// Returns true if initialized properly.
+bool MockDownloadManager::Init(content::BrowserContext* browser_context) {
+  return true;
+}
+
+// Notifications sent from the download thread to the UI thread
+void MockDownloadManager::StartDownload(int32 id) {
+}
+void MockDownloadManager::UpdateDownload(int32 download_id, int64 size) {
+}
+
+// |download_id| is the ID of the download.
+// |size| is the number of bytes that have been downloaded.
+// |hash| is sha256 hash for the downloaded file. It is empty when the hash
+// is not available.
+void MockDownloadManager::OnResponseCompleted(int32 download_id, int64 size,
+                         const std::string& hash) {
+}
+
+// Offthread target for cancelling a particular download.  Will be a no-op
+// if the download has already been cancelled.
+void MockDownloadManager::CancelDownload(int32 download_id) {
+}
+
+// Called when there is an error in the download.
+// |download_id| is the ID of the download.
+// |size| is the number of bytes that are currently downloaded.
+// |reason| is a download interrupt reason code.
+void MockDownloadManager::OnDownloadInterrupted(int32 download_id, int64 size,
+                           InterruptReason reason) {
+}
+
+// Called from DownloadItem to handle the DownloadManager portion of a
+// Cancel; should not be called from other locations.
+void MockDownloadManager::DownloadCancelledInternal(DownloadItem* download) {
+}
+
+// Called from a view when a user clicks a UI button or link.
+void MockDownloadManager::RemoveDownload(int64 download_handle) {
+}
+
+// Determine if the download is ready for completion, i.e. has had
+// all data saved, and completed the filename determination and
+// history insertion.
+bool MockDownloadManager::IsDownloadReadyForCompletion(DownloadItem* download) {
+  return true;
+}
+
+// If all pre-requisites have been met, complete download processing, i.e.
+// do internal cleanup, file rename, and potentially auto-open.
+// (Dangerous downloads still may block on user acceptance after this
+// point.)
+void MockDownloadManager::MaybeCompleteDownload(DownloadItem* download) {
+}
+
+// Called when the download is renamed to its final name.
+// |uniquifier| is a number used to make unique names for the file.  It is
+// only valid for the DANGEROUS_BUT_VALIDATED state of the download item.
+void MockDownloadManager::OnDownloadRenamedToFinalName(int download_id,
+                                  const FilePath& full_path,
+                                  int uniquifier) {
+}
+
+// Remove downloads after remove_begin (inclusive) and before remove_end
+// (exclusive). You may pass in null Time values to do an unbounded delete
+// in either direction.
+int MockDownloadManager::RemoveDownloadsBetween(const base::Time remove_begin,
+                           const base::Time remove_end) {
+  return 0;
+}
+
+// Remove downloads will delete all downloads that have a timestamp that is
+// the same or more recent than |remove_begin|. The number of downloads
+// deleted is returned back to the caller.
+int MockDownloadManager::RemoveDownloads(const base::Time remove_begin) {
+  return 0;
+}
+
+// Remove all downloads will delete all downloads. The number of downloads
+// deleted is returned back to the caller.
+int MockDownloadManager::RemoveAllDownloads() {
+  return 1;
+}
+
+// Final download manager transition for download: Update the download
+// history and remove the download from |active_downloads_|.
+void MockDownloadManager::DownloadCompleted(int32 download_id) {
+}
+
+// Download the object at the URL. Used in cases such as "Save Link As..."
+void MockDownloadManager::DownloadUrl(const GURL& url,
+                 const GURL& referrer,
+                 const std::string& referrer_encoding,
+                 TabContents* tab_contents) {
+}
+
+// Download the object at the URL and save it to the specified path. The
+// download is treated as the temporary download and thus will not appear
+// in the download history. Used in cases such as drag and drop.
+void MockDownloadManager::DownloadUrlToFile(const GURL& url,
+                       const GURL& referrer,
+                       const std::string& referrer_encoding,
+                       const DownloadSaveInfo& save_info,
+                       TabContents* tab_contents) {
+}
+
+// Allow objects to observe the download creation process.
+void MockDownloadManager::AddObserver(Observer* observer) {
+}
+
+// Remove a download observer from ourself.
+void MockDownloadManager::RemoveObserver(Observer* observer) {
+}
+
+// Called by the embedder, after creating the download manager, to let it know
+// about downloads from previous runs of the browser.
+void MockDownloadManager::OnPersistentStoreQueryComplete(
+    std::vector<DownloadPersistentStoreInfo>* entries) {
+}
+
+// Called by the embedder, in response to
+// DownloadManagerDelegate::AddItemToPersistentStore.
+void MockDownloadManager::OnItemAddedToPersistentStore(int32 download_id,
+                                          int64 db_handle) {
+}
+
+// Display a new download in the appropriate browser UI.
+void MockDownloadManager::ShowDownloadInBrowser(DownloadItem* download) {
+}
+
+// The number of in progress (including paused) downloads.
+int MockDownloadManager::InProgressCount() const {
+  return 1;
+}
+
+content::BrowserContext* MockDownloadManager::BrowserContext() {
+  return NULL;
+}
+
+FilePath MockDownloadManager::LastDownloadPath() {
+  return FilePath();
+}
+
+// Creates the download item.  Must be called on the UI thread.
+void MockDownloadManager::CreateDownloadItem(DownloadCreateInfo* info,
+                        const DownloadRequestHandle& request_handle) {
+}
+
+// Clears the last download path, used to initialize "save as" dialogs.
+void MockDownloadManager::ClearLastDownloadPath() {
+}
+
+// Called by the delegate after the save as dialog is closed.
+void MockDownloadManager::FileSelected(const FilePath& path, void* params) {
+}
+void MockDownloadManager::FileSelectionCanceled(void* params) {
+}
+
+// Called by the delegate if it delayed the download in
+// DownloadManagerDelegate::ShouldStartDownload and now is ready.
+void MockDownloadManager::RestartDownload(int32 download_id) {
+}
+
+// Mark the download opened in the persistent store.
+void MockDownloadManager::MarkDownloadOpened(DownloadItem* download) {
+}
+
+// Checks whether downloaded files still exist. Updates state of downloads
+// that refer to removed files. The check runs in the background and may
+// finish asynchronously after this method returns.
+void MockDownloadManager::CheckForHistoryFilesRemoval() {
+}
+
+// Checks whether a downloaded file still exists and updates the file's state
+// if the file is already removed. The check runs in the background and may
+// finish asynchronously after this method returns.
+void MockDownloadManager::CheckForFileRemoval(DownloadItem* download_item) {
+}
+
+// Assert the named download item is on the correct queues
+// in the DownloadManager.  For debugging.
+void MockDownloadManager::AssertQueueStateConsistent(DownloadItem* download) {
+}
+
+// Get the download item from the history map.  Useful after the item has
+// been removed from the active map, or was retrieved from the history DB.
+DownloadItem* MockDownloadManager::GetDownloadItem(int id) {
+  return NULL;
+}
+
+// Called when Save Page download starts. Transfers ownership of |download|
+// to the DownloadManager.
+void MockDownloadManager::SavePageDownloadStarted(DownloadItem* download) {
+}
+
+// Called when Save Page download is done.
+void MockDownloadManager::SavePageDownloadFinished(DownloadItem* download) {
+}
+
+// Get the download item from the active map.  Useful when the item is not
+// yet in the history map.
+DownloadItem* MockDownloadManager::GetActiveDownloadItem(int id) {
+  return NULL;
+}
+
+content::DownloadManagerDelegate* MockDownloadManager::delegate() const {
+  return delegate_;
+}
+
+// For testing only.  May be called from tests indirectly (through
+// other for testing only methods).
+void MockDownloadManager::SetDownloadManagerDelegate(
+    content::DownloadManagerDelegate* delegate) {
+}
+
+DownloadId MockDownloadManager::GetNextId() {
+  return DownloadId(this, 1);
+}
+
+void MockDownloadManager::ContinueDownloadWithPath(DownloadItem* download,
+                                      const FilePath& chosen_file) {
+}
+
+// Retrieves the download from the |download_id|.
+// Returns NULL if the download is not active.
+DownloadItem* MockDownloadManager::GetActiveDownload(int32 download_id) {
+  return NULL;
+}
+
+void MockDownloadManager::SetFileManager(DownloadFileManager* file_manager) {
+}