[fsp] Add support for truncating files.

chrome/browser/chromeos/file_system_provider/operations/truncate_unittest.cc

Index: chrome/browser/chromeos/file_system_provider/operations/truncate_unittest.cc
diff --git a/chrome/browser/chromeos/file_system_provider/operations/create_file_unittest.cc b/chrome/browser/chromeos/file_system_provider/operations/truncate_unittest.cc
similarity index 60%
copy from chrome/browser/chromeos/file_system_provider/operations/create_file_unittest.cc
copy to chrome/browser/chromeos/file_system_provider/operations/truncate_unittest.cc
index 1dbce12445c432556e2944630a9adf849a067cf9..66e2adcbede4aaa307cd7550bdedaaf83f223650 100644
--- a/chrome/browser/chromeos/file_system_provider/operations/create_file_unittest.cc
+++ b/chrome/browser/chromeos/file_system_provider/operations/truncate_unittest.cc
@@ -2,7 +2,7 @@
 // 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>
@@ -28,13 +28,14 @@ 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_ =
@@ -48,24 +49,25 @@ class FileSystemProviderOperationsCreateFileTest : public testing::Test {
   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());
@@ -84,61 +86,68 @@ TEST_F(FileSystemProviderOperationsCreateFileTest, Execute) {
   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]);
 }