[fsp] Add support for reading directories.

chrome/browser/chromeos/file_system_provider/fake_provided_file_system.cc

 // Copyright 2014 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 "chrome/browser/chromeos/file_system_provider/fake_provided_file_system.h"
 
+#include <string>
+
 #include "base/files/file.h"
 #include "base/message_loop/message_loop_proxy.h"
 #include "extensions/browser/event_router.h"
 
 namespace chromeos {
 namespace file_system_provider {
+namespace {
+
+// Adds a fake entry to the entry list.
+void AddDirectoryEntry(fileapi::AsyncFileUtil::EntryList* entry_list,
+                       const std::string& name,
+                       fileapi::DirectoryEntry::DirectoryEntryType type,
+                       int64 size,
+                       std::string last_modified_time_string) {
+  base::Time last_modified_time;
+  const bool result = base::Time::FromString(last_modified_time_string.c_str(),
+                                             &last_modified_time);
+  DCHECK(result);
+  entry_list->push_back(
+      fileapi::DirectoryEntry(name, type, size, last_modified_time));
+}
+
+}  // namespace
 
 FakeProvidedFileSystem::FakeProvidedFileSystem(
     const ProvidedFileSystemInfo& file_system_info)
     : file_system_info_(file_system_info) {
 }
 
 FakeProvidedFileSystem::~FakeProvidedFileSystem() {}
 
 void FakeProvidedFileSystem::RequestUnmount(
     const fileapi::AsyncFileUtil::StatusCallback& callback) {
@@ skipping 20 matching lines @@
   base::Time last_modified_time;
   const bool result = base::Time::FromString("Thu Apr 24 00:46:52 UTC 2014",
                                              &last_modified_time);
   DCHECK(result);
   file_info.last_modified = last_modified_time;
 
   base::MessageLoopProxy::current()->PostTask(
       FROM_HERE, base::Bind(callback, base::File::FILE_OK, file_info));
 }
 
+void FakeProvidedFileSystem::ReadDirectory(
+    const base::FilePath& directory_path,
+    const fileapi::AsyncFileUtil::ReadDirectoryCallback& callback) {
+  // Return fake contents for the root directory only.
+  if (directory_path.AsUTF8Unsafe() != "/") {
+    base::MessageLoopProxy::current()->PostTask(
+        FROM_HERE,
+        base::Bind(callback,
+                   base::File::FILE_ERROR_NOT_FOUND,
+                   fileapi::AsyncFileUtil::EntryList(),
+                   false /* has_more */));
+    return;
+  }
+
+  {
+    fileapi::AsyncFileUtil::EntryList entry_list;
+    AddDirectoryEntry(&entry_list,
+                      "hello.txt",
+                      fileapi::DirectoryEntry::FILE,
+                      1024 /* size */,
+                      "Thu Apr 24 00:46:52 UTC 2014");
+
+    AddDirectoryEntry(&entry_list,
+                      "world.txt",
+                      fileapi::DirectoryEntry::FILE,
+                      1024 /* size */,
+                      "Wed Apr 23 00:20:30 UTC 2014");
+
+    base::MessageLoopProxy::current()->PostTask(
+        FROM_HERE,
+        base::Bind(
+            callback, base::File::FILE_OK, entry_list, true /* has_more */));
+  }
+
+  {
+    fileapi::AsyncFileUtil::EntryList entry_list;
+    AddDirectoryEntry(&entry_list,
+                      "pictures",
+                      fileapi::DirectoryEntry::DIRECTORY,
+                      0 /* size */,
+                      "Tue May 22 00:40:50 UTC 2014");
+
+    base::MessageLoopProxy::current()->PostTask(
+        FROM_HERE,
+        base::Bind(
+            callback, base::File::FILE_OK, entry_list, false /* has_more */));
+  }
+}
+
 const ProvidedFileSystemInfo& FakeProvidedFileSystem::GetFileSystemInfo()
     const {
   return file_system_info_;
 }
 
 RequestManager* FakeProvidedFileSystem::GetRequestManager() {
   NOTREACHED();
   return NULL;
 }
 
 ProvidedFileSystemInterface* FakeProvidedFileSystem::Create(
     extensions::EventRouter* event_router,
     const ProvidedFileSystemInfo& file_system_info) {
   return new FakeProvidedFileSystem(file_system_info);
 }
 
 }  // namespace file_system_provider
 }  // namespace chromeos