[fsp] Add support for truncating files.

chrome/browser/chromeos/file_system_provider/operations/truncate_unittest.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/operations/create_file.h"
+#include "chrome/browser/chromeos/file_system_provider/operations/truncate.h"
 
 #include <string>
 #include <vector>
 
 #include "base/files/file.h"
 #include "base/files/file_path.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/scoped_vector.h"
 #include "chrome/browser/chromeos/file_system_provider/operations/test_util.h"
 #include "chrome/browser/chromeos/file_system_provider/provided_file_system_interface.h"
 #include "chrome/common/extensions/api/file_system_provider.h"
 #include "chrome/common/extensions/api/file_system_provider_internal.h"
 #include "extensions/browser/event_router.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "webkit/browser/fileapi/async_file_util.h"
 
 namespace chromeos {
 namespace file_system_provider {
 namespace operations {
 namespace {
 
 const char kExtensionId[] = "mbflcebpggnecokmikipoihdbecnjfoj";
 const char kFileSystemId[] = "testing-file-system";
 const int kRequestId = 2;
 const base::FilePath::CharType kFilePath[] = "/kitty/and/puppy/happy";
+const int64 kTruncateLength = 64;
 
 }  // namespace
 
-class FileSystemProviderOperationsCreateFileTest : public testing::Test {
+class FileSystemProviderOperationsTruncateTest : public testing::Test {
  protected:
-  FileSystemProviderOperationsCreateFileTest() {}
-  virtual ~FileSystemProviderOperationsCreateFileTest() {}
+  FileSystemProviderOperationsTruncateTest() {}
+  virtual ~FileSystemProviderOperationsTruncateTest() {}
 
   virtual void SetUp() OVERRIDE {
     file_system_info_ =
         ProvidedFileSystemInfo(kExtensionId,
                                kFileSystemId,
                                "" /* file_system_name */,
                                true /* writable */,
                                base::FilePath() /* mount_path */);
   }
 
   ProvidedFileSystemInfo file_system_info_;
 };
 
-TEST_F(FileSystemProviderOperationsCreateFileTest, Execute) {
+TEST_F(FileSystemProviderOperationsTruncateTest, Execute) {
   util::LoggingDispatchEventImpl dispatcher(true /* dispatch_reply */);
   util::StatusCallbackLog callback_log;
 
-  CreateFile create_file(NULL,
-                         file_system_info_,
-                         base::FilePath::FromUTF8Unsafe(kFilePath),
-                         base::Bind(&util::LogStatusCallback, &callback_log));
-  create_file.SetDispatchEventImplForTesting(
+  Truncate truncate(NULL,
+                    file_system_info_,
+                    base::FilePath::FromUTF8Unsafe(kFilePath),
+                    kTruncateLength,
+                    base::Bind(&util::LogStatusCallback, &callback_log));
+  truncate.SetDispatchEventImplForTesting(
       base::Bind(&util::LoggingDispatchEventImpl::OnDispatchEventImpl,
                  base::Unretained(&dispatcher)));
 
-  EXPECT_TRUE(create_file.Execute(kRequestId));
+  EXPECT_TRUE(truncate.Execute(kRequestId));
 
   ASSERT_EQ(1u, dispatcher.events().size());
   extensions::Event* event = dispatcher.events()[0];
   EXPECT_EQ(
-      extensions::api::file_system_provider::OnCreateFileRequested::kEventName,
+      extensions::api::file_system_provider::OnTruncateRequested::kEventName,
       event->event_name);
   base::ListValue* event_args = event->event_args.get();
   ASSERT_EQ(1u, event_args->GetSize());
 
   base::DictionaryValue* options = NULL;
   ASSERT_TRUE(event_args->GetDictionary(0, &options));
 
   std::string event_file_system_id;
   EXPECT_TRUE(options->GetString("fileSystemId", &event_file_system_id));
   EXPECT_EQ(kFileSystemId, event_file_system_id);
 
   int event_request_id = -1;
   EXPECT_TRUE(options->GetInteger("requestId", &event_request_id));
   EXPECT_EQ(kRequestId, event_request_id);
 
   std::string event_file_path;
   EXPECT_TRUE(options->GetString("filePath", &event_file_path));
   EXPECT_EQ(kFilePath, event_file_path);
+
+  double event_length = -1;
+  EXPECT_TRUE(options->GetDouble("length", &event_length));
+  EXPECT_EQ(kTruncateLength, static_cast<double>(event_length));
 }
 
-TEST_F(FileSystemProviderOperationsCreateFileTest, Execute_NoListener) {
+TEST_F(FileSystemProviderOperationsTruncateTest, Execute_NoListener) {
   util::LoggingDispatchEventImpl dispatcher(false /* dispatch_reply */);
   util::StatusCallbackLog callback_log;
 
-  CreateFile create_file(NULL,
-                         file_system_info_,
-                         base::FilePath::FromUTF8Unsafe(kFilePath),
-                         base::Bind(&util::LogStatusCallback, &callback_log));
-  create_file.SetDispatchEventImplForTesting(
+  Truncate truncate(NULL,
+                    file_system_info_,
+                    base::FilePath::FromUTF8Unsafe(kFilePath),
+                    kTruncateLength,
+                    base::Bind(&util::LogStatusCallback, &callback_log));
+  truncate.SetDispatchEventImplForTesting(
       base::Bind(&util::LoggingDispatchEventImpl::OnDispatchEventImpl,
                  base::Unretained(&dispatcher)));
 
-  EXPECT_FALSE(create_file.Execute(kRequestId));
+  EXPECT_FALSE(truncate.Execute(kRequestId));
 }
 
-TEST_F(FileSystemProviderOperationsCreateFileTest, OnSuccess) {
+TEST_F(FileSystemProviderOperationsTruncateTest, OnSuccess) {
   util::LoggingDispatchEventImpl dispatcher(true /* dispatch_reply */);
   util::StatusCallbackLog callback_log;
 
-  CreateFile create_file(NULL,
-                         file_system_info_,
-                         base::FilePath::FromUTF8Unsafe(kFilePath),
-                         base::Bind(&util::LogStatusCallback, &callback_log));
-  create_file.SetDispatchEventImplForTesting(
+  Truncate truncate(NULL,
+                    file_system_info_,
+                    base::FilePath::FromUTF8Unsafe(kFilePath),
+                    kTruncateLength,
+                    base::Bind(&util::LogStatusCallback, &callback_log));
+  truncate.SetDispatchEventImplForTesting(
       base::Bind(&util::LoggingDispatchEventImpl::OnDispatchEventImpl,
                  base::Unretained(&dispatcher)));
 
-  EXPECT_TRUE(create_file.Execute(kRequestId));
+  EXPECT_TRUE(truncate.Execute(kRequestId));
 
-  create_file.OnSuccess(kRequestId,
-                        scoped_ptr<RequestValue>(new RequestValue()),
-                        false /* has_more */);
+  truncate.OnSuccess(kRequestId,
+                     scoped_ptr<RequestValue>(new RequestValue()),
+                     false /* has_more */);
   ASSERT_EQ(1u, callback_log.size());
   EXPECT_EQ(base::File::FILE_OK, callback_log[0]);
 }
 
-TEST_F(FileSystemProviderOperationsCreateFileTest, OnError) {
+TEST_F(FileSystemProviderOperationsTruncateTest, OnError) {
   util::LoggingDispatchEventImpl dispatcher(true /* dispatch_reply */);
   util::StatusCallbackLog callback_log;
 
-  CreateFile create_file(NULL,
-                         file_system_info_,
-                         base::FilePath::FromUTF8Unsafe(kFilePath),
-                         base::Bind(&util::LogStatusCallback, &callback_log));
-  create_file.SetDispatchEventImplForTesting(
+  Truncate truncate(NULL,
+                    file_system_info_,
+                    base::FilePath::FromUTF8Unsafe(kFilePath),
+                    kTruncateLength,
+                    base::Bind(&util::LogStatusCallback, &callback_log));
+  truncate.SetDispatchEventImplForTesting(
       base::Bind(&util::LoggingDispatchEventImpl::OnDispatchEventImpl,
                  base::Unretained(&dispatcher)));
 
-  EXPECT_TRUE(create_file.Execute(kRequestId));
+  EXPECT_TRUE(truncate.Execute(kRequestId));
 
-  create_file.OnError(kRequestId,
-                      scoped_ptr<RequestValue>(new RequestValue()),
-                      base::File::FILE_ERROR_TOO_MANY_OPENED);
+  truncate.OnError(kRequestId,
+                   scoped_ptr<RequestValue>(new RequestValue()),
+                   base::File::FILE_ERROR_TOO_MANY_OPENED);
   ASSERT_EQ(1u, callback_log.size());
   EXPECT_EQ(base::File::FILE_ERROR_TOO_MANY_OPENED, callback_log[0]);
 }
 
 }  // namespace operations
 }  // namespace file_system_provider
 }  // namespace chromeos