ppapi/proxy/file_system_resource_unittest.cc - chromium/src.git - Git at Google

 // 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 <stdint.h>

 #include "base/message_loop/message_loop.h"
 #include "ppapi/c/pp_errors.h"
 #include "ppapi/c/ppb_file_io.h"
 #include "ppapi/c/ppb_file_ref.h"
 #include "ppapi/c/ppb_file_system.h"
 #include "ppapi/proxy/file_system_resource.h"
 #include "ppapi/proxy/locking_resource_releaser.h"
 #include "ppapi/proxy/plugin_message_filter.h"
 #include "ppapi/proxy/ppapi_message_utils.h"
 #include "ppapi/proxy/ppapi_messages.h"
 #include "ppapi/proxy/ppapi_proxy_test.h"
 #include "ppapi/shared_impl/proxy_lock.h"
 #include "ppapi/shared_impl/scoped_pp_var.h"
 #include "ppapi/shared_impl/var.h"
 #include "ppapi/thunk/enter.h"
 #include "ppapi/thunk/ppb_file_system_api.h"
 #include "ppapi/thunk/thunk.h"

 using ppapi::proxy::ResourceMessageTestSink;
 using ppapi::thunk::EnterResource;
 using ppapi::thunk::PPB_FileSystem_API;

 namespace ppapi {
 namespace proxy {

 namespace {

 const int64_t kExpectedFileSystemSize = 100;
 const int64_t kQuotaRequestAmount1 = 10;
 const int64_t kQuotaRequestAmount2 = 20;

 class MockCompletionCallback {
  public:
   MockCompletionCallback() : called_(false) {}

   bool called() { return called_; }
   int32_t result() { return result_; }

   static void Callback(void* user_data, int32_t result) {
     MockCompletionCallback* that =
         reinterpret_cast<MockCompletionCallback*>(user_data);
     that->called_ = true;
     that->result_ = result;
   }

  private:
   bool called_;
   int32_t result_;
 };

 class MockRequestQuotaCallback {
  public:
   MockRequestQuotaCallback() : called_(false) {}

   bool called() { return called_; }
   int64_t result() { return result_; }

   void Reset() { called_ = false; }

   void Callback(int64_t result) {
     ASSERT_FALSE(called_);
     called_ = true;
     result_ = result;
   }

  private:
   bool called_;
   int64_t result_;
 };

 class FileSystemResourceTest : public PluginProxyTest {
  public:
   const PPB_FileSystem_1_0* file_system_iface;
   const PPB_FileRef_1_1* file_ref_iface;
   const PPB_FileIO_1_1* file_io_iface;

   FileSystemResourceTest()
       : file_system_iface(thunk::GetPPB_FileSystem_1_0_Thunk()),
         file_ref_iface(thunk::GetPPB_FileRef_1_1_Thunk()),
         file_io_iface(thunk::GetPPB_FileIO_1_1_Thunk()) {
   }

   void SendReply(const ResourceMessageCallParams& params,
                  int32_t result,
                  const IPC::Message& nested_message) {
     ResourceMessageReplyParams reply_params(params.pp_resource(),
                                             params.sequence());
     reply_params.set_result(result);
     PluginMessageFilter::DispatchResourceReplyForTest(
         reply_params, nested_message);
   }

   void SendOpenReply(const ResourceMessageCallParams& params, int32_t result) {
     SendReply(params, result, PpapiPluginMsg_FileSystem_OpenReply());
   }

   // Opens the given file system.
   void OpenFileSystem(PP_Resource file_system) {
     MockCompletionCallback cb;
     int32_t result = file_system_iface->Open(
         file_system,
         kExpectedFileSystemSize,
         PP_MakeCompletionCallback(&MockCompletionCallback::Callback, &cb));
     ASSERT_EQ(PP_OK_COMPLETIONPENDING, result);

     // Should have sent two new "open" messages to the browser and renderer.
     ResourceMessageTestSink::ResourceCallVector open_messages =
         sink().GetAllResourceCallsMatching(PpapiHostMsg_FileSystem_Open::ID);
     ASSERT_EQ(2U, open_messages.size());
     sink().ClearMessages();

     // The resource is expecting two replies.
     SendOpenReply(open_messages[0].first, PP_OK);
     SendOpenReply(open_messages[1].first, PP_OK);

     ASSERT_TRUE(cb.called());
     ASSERT_EQ(PP_OK, cb.result());
   }

   // Opens the given file in the given file system. Since there is no host,
   // the file handle will be invalid.
   void OpenFile(PP_Resource file_io,
                 PP_Resource file_ref,
                 PP_Resource file_system) {
     MockCompletionCallback cb;
     int32_t result = file_io_iface->Open(
         file_io,
         file_ref,
         PP_FILEOPENFLAG_WRITE,
         PP_MakeCompletionCallback(&MockCompletionCallback::Callback, &cb));
     ASSERT_EQ(PP_OK_COMPLETIONPENDING, result);

     // Should have sent an "open" message.
     ResourceMessageCallParams params;
     IPC::Message msg;
     ASSERT_TRUE(sink().GetFirstResourceCallMatching(
         PpapiHostMsg_FileIO_Open::ID, &params, &msg));
     sink().ClearMessages();

     // Send a success reply.
     ResourceMessageReplyParams reply_params(params.pp_resource(),
                                             params.sequence());
     reply_params.set_result(PP_OK);
     PluginMessageFilter::DispatchResourceReplyForTest(
         reply_params,
         PpapiPluginMsg_FileIO_OpenReply(file_system,
                                         0 /* max_written_offset */));
   }
 };

 }  // namespace

 // Test that Open fails if either host returns failure. The other tests exercise
 // the case where both hosts return PP_OK.
 TEST_F(FileSystemResourceTest, OpenFailure) {
   // Fail if the first reply doesn't return PP_OK.
   {
     LockingResourceReleaser file_system(
         file_system_iface->Create(pp_instance(),
                                   PP_FILESYSTEMTYPE_LOCALTEMPORARY));

     MockCompletionCallback cb;
     int32_t result = file_system_iface->Open(
         file_system.get(),
         kExpectedFileSystemSize,
         PP_MakeCompletionCallback(&MockCompletionCallback::Callback, &cb));
     ASSERT_EQ(PP_OK_COMPLETIONPENDING, result);

     ResourceMessageTestSink::ResourceCallVector open_messages =
         sink().GetAllResourceCallsMatching(PpapiHostMsg_FileSystem_Open::ID);
     ASSERT_EQ(2U, open_messages.size());
     sink().ClearMessages();

     SendOpenReply(open_messages[0].first, PP_ERROR_FAILED);
     SendOpenReply(open_messages[1].first, PP_OK);

     ASSERT_TRUE(cb.called());
     ASSERT_EQ(PP_ERROR_FAILED, cb.result());
   }
   // Fail if the second reply doesn't return PP_OK.
   {
     LockingResourceReleaser file_system(
         file_system_iface->Create(pp_instance(),
                                   PP_FILESYSTEMTYPE_LOCALTEMPORARY));

     MockCompletionCallback cb;
     int32_t result = file_system_iface->Open(
         file_system.get(),
         kExpectedFileSystemSize,
         PP_MakeCompletionCallback(&MockCompletionCallback::Callback, &cb));
     ASSERT_EQ(PP_OK_COMPLETIONPENDING, result);

     ResourceMessageTestSink::ResourceCallVector open_messages =
         sink().GetAllResourceCallsMatching(PpapiHostMsg_FileSystem_Open::ID);
     ASSERT_EQ(2U, open_messages.size());
     sink().ClearMessages();

     SendOpenReply(open_messages[0].first, PP_OK);
     SendOpenReply(open_messages[1].first, PP_ERROR_FAILED);

     ASSERT_TRUE(cb.called());
     ASSERT_EQ(PP_ERROR_FAILED, cb.result());
   }
 }

 TEST_F(FileSystemResourceTest, RequestQuota) {
   LockingResourceReleaser file_system(
       file_system_iface->Create(pp_instance(),
                                 PP_FILESYSTEMTYPE_LOCALTEMPORARY));

   OpenFileSystem(file_system.get());

   // Create and open two files in the file system. FileIOResource calls
   // FileSystemResource::OpenQuotaFile on success.
   LockingResourceReleaser file_ref1(
       file_ref_iface->Create(file_system.get(), "/file1"));
   LockingResourceReleaser file_io1(file_io_iface->Create(pp_instance()));
   OpenFile(file_io1.get(), file_ref1.get(), file_system.get());
   LockingResourceReleaser file_ref2(
       file_ref_iface->Create(file_system.get(), "/file2"));
   LockingResourceReleaser file_io2(file_io_iface->Create(pp_instance()));
   OpenFile(file_io2.get(), file_ref2.get(), file_system.get());

   EnterResource<PPB_FileSystem_API> enter(file_system.get(), true);
   ASSERT_FALSE(enter.failed());
   PPB_FileSystem_API* file_system_api = enter.object();

   MockRequestQuotaCallback cb1;
   int64_t result = file_system_api->RequestQuota(
       kQuotaRequestAmount1,
       base::Bind(&MockRequestQuotaCallback::Callback, base::Unretained(&cb1)));
   ASSERT_EQ(PP_OK_COMPLETIONPENDING, result);

   // Should have sent a "reserve quota" message, with the amount of the request
   // and a map of all currently open files to their max written offsets.
   ResourceMessageCallParams params;
   IPC::Message msg;
   ASSERT_TRUE(sink().GetFirstResourceCallMatching(
       PpapiHostMsg_FileSystem_ReserveQuota::ID, &params, &msg));
   sink().ClearMessages();

   int64_t amount = 0;
   FileGrowthMap file_growths;
   ASSERT_TRUE(UnpackMessage<PpapiHostMsg_FileSystem_ReserveQuota>(
       msg, &amount, &file_growths));
   ASSERT_EQ(kQuotaRequestAmount1, amount);
   ASSERT_EQ(2U, file_growths.size());
   ASSERT_EQ(0, file_growths[file_io1.get()].max_written_offset);
   ASSERT_EQ(0, file_growths[file_io2.get()].max_written_offset);

   // Make another request while the "reserve quota" message is pending.
   MockRequestQuotaCallback cb2;
   result = file_system_api->RequestQuota(
       kQuotaRequestAmount2,
       base::Bind(&MockRequestQuotaCallback::Callback, base::Unretained(&cb2)));
   ASSERT_EQ(PP_OK_COMPLETIONPENDING, result);
   // No new "reserve quota" message should be sent while one is pending.
   ASSERT_FALSE(sink().GetFirstResourceCallMatching(
       PpapiHostMsg_FileSystem_ReserveQuota::ID, &params, &msg));
   {
     ProxyAutoUnlock unlock_to_prevent_deadlock;
     // Reply with quota reservation amount sufficient to cover both requests.
     // Both callbacks should be called with the requests granted.
     SendReply(params,
               PP_OK,
               PpapiPluginMsg_FileSystem_ReserveQuotaReply(
                   kQuotaRequestAmount1 + kQuotaRequestAmount2,
                   FileGrowthMapToFileSizeMapForTesting(file_growths)));
   }
   ASSERT_TRUE(cb1.called());
   ASSERT_EQ(kQuotaRequestAmount1, cb1.result());
   ASSERT_TRUE(cb2.called());
   ASSERT_EQ(kQuotaRequestAmount2, cb2.result());
   cb1.Reset();
   cb2.Reset();

   // All requests should fail when insufficient quota is returned to satisfy
   // the first request.
   result = file_system_api->RequestQuota(
       kQuotaRequestAmount1,
       base::Bind(&MockRequestQuotaCallback::Callback, base::Unretained(&cb1)));
   ASSERT_EQ(PP_OK_COMPLETIONPENDING, result);
   result = file_system_api->RequestQuota(
       kQuotaRequestAmount2,
       base::Bind(&MockRequestQuotaCallback::Callback, base::Unretained(&cb2)));
   ASSERT_EQ(PP_OK_COMPLETIONPENDING, result);

   ASSERT_TRUE(sink().GetFirstResourceCallMatching(
       PpapiHostMsg_FileSystem_ReserveQuota::ID, &params, &msg));
   sink().ClearMessages();
   {
     ProxyAutoUnlock unlock_to_prevent_deadlock;
     // Reply with quota reservation amount insufficient to cover the first
     // request.
     SendReply(params,
               PP_OK,
               PpapiPluginMsg_FileSystem_ReserveQuotaReply(
                   kQuotaRequestAmount1 - 1,
                   FileGrowthMapToFileSizeMapForTesting(file_growths)));
   }
   ASSERT_TRUE(cb1.called());
   ASSERT_EQ(0, cb1.result());
   ASSERT_TRUE(cb2.called());
   ASSERT_EQ(0, cb2.result());
   cb1.Reset();
   cb2.Reset();

   // A new request should be made if the quota reservation is enough to satisfy
   // at least one request.
   result = file_system_api->RequestQuota(
       kQuotaRequestAmount1,
       base::Bind(&MockRequestQuotaCallback::Callback, base::Unretained(&cb1)));
   ASSERT_EQ(PP_OK_COMPLETIONPENDING, result);
   result = file_system_api->RequestQuota(
       kQuotaRequestAmount2,
       base::Bind(&MockRequestQuotaCallback::Callback, base::Unretained(&cb2)));
   ASSERT_EQ(PP_OK_COMPLETIONPENDING, result);

   ASSERT_TRUE(sink().GetFirstResourceCallMatching(
       PpapiHostMsg_FileSystem_ReserveQuota::ID, &params, &msg));
   sink().ClearMessages();
   {
     ProxyAutoUnlock unlock_to_prevent_deadlock;
     // Reply with quota reservation amount sufficient only to cover the first
     // request.
     SendReply(params,
               PP_OK,
               PpapiPluginMsg_FileSystem_ReserveQuotaReply(
                   kQuotaRequestAmount1,
                   FileGrowthMapToFileSizeMapForTesting(file_growths)));
   }
   ASSERT_TRUE(cb1.called());
   ASSERT_EQ(kQuotaRequestAmount1, cb1.result());
   ASSERT_FALSE(cb2.called());

   // Another request message should have been sent.
   ASSERT_TRUE(sink().GetFirstResourceCallMatching(
       PpapiHostMsg_FileSystem_ReserveQuota::ID, &params, &msg));
   sink().ClearMessages();
   {
     ProxyAutoUnlock unlock_to_prevent_deadlock;
     // Reply with quota reservation amount sufficient to cover the second
     // request and some extra.
     SendReply(params,
               PP_OK,
               PpapiPluginMsg_FileSystem_ReserveQuotaReply(
                   kQuotaRequestAmount1 + kQuotaRequestAmount2,
                   FileGrowthMapToFileSizeMapForTesting(file_growths)));
   }

   ASSERT_TRUE(cb2.called());
   ASSERT_EQ(kQuotaRequestAmount2, cb2.result());
   cb1.Reset();
   cb2.Reset();

   // There is kQuotaRequestAmount1 of quota left, and a request for it should
   // succeed immediately.
   result = file_system_api->RequestQuota(
       kQuotaRequestAmount1,
       base::Bind(&MockRequestQuotaCallback::Callback, base::Unretained(&cb1)));
   ASSERT_EQ(kQuotaRequestAmount1, result);
 }

 }  // namespace proxy
 }  // namespace ppapi
	// 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 <stdint.h>

	#include "base/message_loop/message_loop.h"
	#include "ppapi/c/pp_errors.h"
	#include "ppapi/c/ppb_file_io.h"
	#include "ppapi/c/ppb_file_ref.h"
	#include "ppapi/c/ppb_file_system.h"
	#include "ppapi/proxy/file_system_resource.h"
	#include "ppapi/proxy/locking_resource_releaser.h"
	#include "ppapi/proxy/plugin_message_filter.h"
	#include "ppapi/proxy/ppapi_message_utils.h"
	#include "ppapi/proxy/ppapi_messages.h"
	#include "ppapi/proxy/ppapi_proxy_test.h"
	#include "ppapi/shared_impl/proxy_lock.h"
	#include "ppapi/shared_impl/scoped_pp_var.h"
	#include "ppapi/shared_impl/var.h"
	#include "ppapi/thunk/enter.h"
	#include "ppapi/thunk/ppb_file_system_api.h"
	#include "ppapi/thunk/thunk.h"

	using ppapi::proxy::ResourceMessageTestSink;
	using ppapi::thunk::EnterResource;
	using ppapi::thunk::PPB_FileSystem_API;

	namespace ppapi {
	namespace proxy {

	namespace {

	const int64_t kExpectedFileSystemSize = 100;
	const int64_t kQuotaRequestAmount1 = 10;
	const int64_t kQuotaRequestAmount2 = 20;

	class MockCompletionCallback {
	public:
	MockCompletionCallback() : called_(false) {}

	bool called() { return called_; }
	int32_t result() { return result_; }

	static void Callback(void* user_data, int32_t result) {
	MockCompletionCallback* that =
	reinterpret_cast<MockCompletionCallback*>(user_data);
	that->called_ = true;
	that->result_ = result;
	}

	private:
	bool called_;
	int32_t result_;
	};

	class MockRequestQuotaCallback {
	public:
	MockRequestQuotaCallback() : called_(false) {}

	bool called() { return called_; }
	int64_t result() { return result_; }

	void Reset() { called_ = false; }

	void Callback(int64_t result) {
	ASSERT_FALSE(called_);
	called_ = true;
	result_ = result;
	}

	private:
	bool called_;
	int64_t result_;
	};

	class FileSystemResourceTest : public PluginProxyTest {
	public:
	const PPB_FileSystem_1_0* file_system_iface;
	const PPB_FileRef_1_1* file_ref_iface;
	const PPB_FileIO_1_1* file_io_iface;

	FileSystemResourceTest()
	: file_system_iface(thunk::GetPPB_FileSystem_1_0_Thunk()),
	file_ref_iface(thunk::GetPPB_FileRef_1_1_Thunk()),
	file_io_iface(thunk::GetPPB_FileIO_1_1_Thunk()) {
	}

	void SendReply(const ResourceMessageCallParams& params,
	int32_t result,
	const IPC::Message& nested_message) {
	ResourceMessageReplyParams reply_params(params.pp_resource(),
	params.sequence());
	reply_params.set_result(result);
	PluginMessageFilter::DispatchResourceReplyForTest(
	reply_params, nested_message);
	}

	void SendOpenReply(const ResourceMessageCallParams& params, int32_t result) {
	SendReply(params, result, PpapiPluginMsg_FileSystem_OpenReply());
	}

	// Opens the given file system.
	void OpenFileSystem(PP_Resource file_system) {
	MockCompletionCallback cb;
	int32_t result = file_system_iface->Open(
	file_system,
	kExpectedFileSystemSize,
	PP_MakeCompletionCallback(&MockCompletionCallback::Callback, &cb));
	ASSERT_EQ(PP_OK_COMPLETIONPENDING, result);

	// Should have sent two new "open" messages to the browser and renderer.
	ResourceMessageTestSink::ResourceCallVector open_messages =
	sink().GetAllResourceCallsMatching(PpapiHostMsg_FileSystem_Open::ID);
	ASSERT_EQ(2U, open_messages.size());
	sink().ClearMessages();

	// The resource is expecting two replies.
	SendOpenReply(open_messages[0].first, PP_OK);
	SendOpenReply(open_messages[1].first, PP_OK);

	ASSERT_TRUE(cb.called());
	ASSERT_EQ(PP_OK, cb.result());
	}

	// Opens the given file in the given file system. Since there is no host,
	// the file handle will be invalid.
	void OpenFile(PP_Resource file_io,
	PP_Resource file_ref,
	PP_Resource file_system) {
	MockCompletionCallback cb;
	int32_t result = file_io_iface->Open(
	file_io,
	file_ref,
	PP_FILEOPENFLAG_WRITE,
	PP_MakeCompletionCallback(&MockCompletionCallback::Callback, &cb));
	ASSERT_EQ(PP_OK_COMPLETIONPENDING, result);

	// Should have sent an "open" message.
	ResourceMessageCallParams params;
	IPC::Message msg;
	ASSERT_TRUE(sink().GetFirstResourceCallMatching(
	PpapiHostMsg_FileIO_Open::ID, &params, &msg));
	sink().ClearMessages();

	// Send a success reply.
	ResourceMessageReplyParams reply_params(params.pp_resource(),
	params.sequence());
	reply_params.set_result(PP_OK);
	PluginMessageFilter::DispatchResourceReplyForTest(
	reply_params,
	PpapiPluginMsg_FileIO_OpenReply(file_system,
	0 /* max_written_offset */));
	}
	};

	} // namespace

	// Test that Open fails if either host returns failure. The other tests exercise
	// the case where both hosts return PP_OK.
	TEST_F(FileSystemResourceTest, OpenFailure) {
	// Fail if the first reply doesn't return PP_OK.
	{
	LockingResourceReleaser file_system(
	file_system_iface->Create(pp_instance(),
	PP_FILESYSTEMTYPE_LOCALTEMPORARY));

	MockCompletionCallback cb;
	int32_t result = file_system_iface->Open(
	file_system.get(),
	kExpectedFileSystemSize,
	PP_MakeCompletionCallback(&MockCompletionCallback::Callback, &cb));
	ASSERT_EQ(PP_OK_COMPLETIONPENDING, result);

	ResourceMessageTestSink::ResourceCallVector open_messages =
	sink().GetAllResourceCallsMatching(PpapiHostMsg_FileSystem_Open::ID);
	ASSERT_EQ(2U, open_messages.size());
	sink().ClearMessages();

	SendOpenReply(open_messages[0].first, PP_ERROR_FAILED);
	SendOpenReply(open_messages[1].first, PP_OK);

	ASSERT_TRUE(cb.called());
	ASSERT_EQ(PP_ERROR_FAILED, cb.result());
	}
	// Fail if the second reply doesn't return PP_OK.
	{
	LockingResourceReleaser file_system(
	file_system_iface->Create(pp_instance(),
	PP_FILESYSTEMTYPE_LOCALTEMPORARY));

	MockCompletionCallback cb;
	int32_t result = file_system_iface->Open(
	file_system.get(),
	kExpectedFileSystemSize,
	PP_MakeCompletionCallback(&MockCompletionCallback::Callback, &cb));
	ASSERT_EQ(PP_OK_COMPLETIONPENDING, result);

	ResourceMessageTestSink::ResourceCallVector open_messages =
	sink().GetAllResourceCallsMatching(PpapiHostMsg_FileSystem_Open::ID);
	ASSERT_EQ(2U, open_messages.size());
	sink().ClearMessages();

	SendOpenReply(open_messages[0].first, PP_OK);
	SendOpenReply(open_messages[1].first, PP_ERROR_FAILED);

	ASSERT_TRUE(cb.called());
	ASSERT_EQ(PP_ERROR_FAILED, cb.result());
	}
	}

	TEST_F(FileSystemResourceTest, RequestQuota) {
	LockingResourceReleaser file_system(
	file_system_iface->Create(pp_instance(),
	PP_FILESYSTEMTYPE_LOCALTEMPORARY));

	OpenFileSystem(file_system.get());

	// Create and open two files in the file system. FileIOResource calls
	// FileSystemResource::OpenQuotaFile on success.
	LockingResourceReleaser file_ref1(
	file_ref_iface->Create(file_system.get(), "/file1"));
	LockingResourceReleaser file_io1(file_io_iface->Create(pp_instance()));
	OpenFile(file_io1.get(), file_ref1.get(), file_system.get());
	LockingResourceReleaser file_ref2(
	file_ref_iface->Create(file_system.get(), "/file2"));
	LockingResourceReleaser file_io2(file_io_iface->Create(pp_instance()));
	OpenFile(file_io2.get(), file_ref2.get(), file_system.get());

	EnterResource<PPB_FileSystem_API> enter(file_system.get(), true);
	ASSERT_FALSE(enter.failed());
	PPB_FileSystem_API* file_system_api = enter.object();

	MockRequestQuotaCallback cb1;
	int64_t result = file_system_api->RequestQuota(
	kQuotaRequestAmount1,
	base::Bind(&MockRequestQuotaCallback::Callback, base::Unretained(&cb1)));
	ASSERT_EQ(PP_OK_COMPLETIONPENDING, result);

	// Should have sent a "reserve quota" message, with the amount of the request
	// and a map of all currently open files to their max written offsets.
	ResourceMessageCallParams params;
	IPC::Message msg;
	ASSERT_TRUE(sink().GetFirstResourceCallMatching(
	PpapiHostMsg_FileSystem_ReserveQuota::ID, &params, &msg));
	sink().ClearMessages();

	int64_t amount = 0;
	FileGrowthMap file_growths;
	ASSERT_TRUE(UnpackMessage<PpapiHostMsg_FileSystem_ReserveQuota>(
	msg, &amount, &file_growths));
	ASSERT_EQ(kQuotaRequestAmount1, amount);
	ASSERT_EQ(2U, file_growths.size());
	ASSERT_EQ(0, file_growths[file_io1.get()].max_written_offset);
	ASSERT_EQ(0, file_growths[file_io2.get()].max_written_offset);

	// Make another request while the "reserve quota" message is pending.
	MockRequestQuotaCallback cb2;
	result = file_system_api->RequestQuota(
	kQuotaRequestAmount2,
	base::Bind(&MockRequestQuotaCallback::Callback, base::Unretained(&cb2)));
	ASSERT_EQ(PP_OK_COMPLETIONPENDING, result);
	// No new "reserve quota" message should be sent while one is pending.
	ASSERT_FALSE(sink().GetFirstResourceCallMatching(
	PpapiHostMsg_FileSystem_ReserveQuota::ID, &params, &msg));
	{
	ProxyAutoUnlock unlock_to_prevent_deadlock;
	// Reply with quota reservation amount sufficient to cover both requests.
	// Both callbacks should be called with the requests granted.
	SendReply(params,
	PP_OK,
	PpapiPluginMsg_FileSystem_ReserveQuotaReply(
	kQuotaRequestAmount1 + kQuotaRequestAmount2,
	FileGrowthMapToFileSizeMapForTesting(file_growths)));
	}
	ASSERT_TRUE(cb1.called());
	ASSERT_EQ(kQuotaRequestAmount1, cb1.result());
	ASSERT_TRUE(cb2.called());
	ASSERT_EQ(kQuotaRequestAmount2, cb2.result());
	cb1.Reset();
	cb2.Reset();

	// All requests should fail when insufficient quota is returned to satisfy
	// the first request.
	result = file_system_api->RequestQuota(
	kQuotaRequestAmount1,
	base::Bind(&MockRequestQuotaCallback::Callback, base::Unretained(&cb1)));
	ASSERT_EQ(PP_OK_COMPLETIONPENDING, result);
	result = file_system_api->RequestQuota(
	kQuotaRequestAmount2,
	base::Bind(&MockRequestQuotaCallback::Callback, base::Unretained(&cb2)));
	ASSERT_EQ(PP_OK_COMPLETIONPENDING, result);

	ASSERT_TRUE(sink().GetFirstResourceCallMatching(
	PpapiHostMsg_FileSystem_ReserveQuota::ID, &params, &msg));
	sink().ClearMessages();
	{
	ProxyAutoUnlock unlock_to_prevent_deadlock;
	// Reply with quota reservation amount insufficient to cover the first
	// request.
	SendReply(params,
	PP_OK,
	PpapiPluginMsg_FileSystem_ReserveQuotaReply(
	kQuotaRequestAmount1 - 1,
	FileGrowthMapToFileSizeMapForTesting(file_growths)));
	}
	ASSERT_TRUE(cb1.called());
	ASSERT_EQ(0, cb1.result());
	ASSERT_TRUE(cb2.called());
	ASSERT_EQ(0, cb2.result());
	cb1.Reset();
	cb2.Reset();

	// A new request should be made if the quota reservation is enough to satisfy
	// at least one request.
	result = file_system_api->RequestQuota(
	kQuotaRequestAmount1,
	base::Bind(&MockRequestQuotaCallback::Callback, base::Unretained(&cb1)));
	ASSERT_EQ(PP_OK_COMPLETIONPENDING, result);
	result = file_system_api->RequestQuota(
	kQuotaRequestAmount2,
	base::Bind(&MockRequestQuotaCallback::Callback, base::Unretained(&cb2)));
	ASSERT_EQ(PP_OK_COMPLETIONPENDING, result);

	ASSERT_TRUE(sink().GetFirstResourceCallMatching(
	PpapiHostMsg_FileSystem_ReserveQuota::ID, &params, &msg));
	sink().ClearMessages();
	{
	ProxyAutoUnlock unlock_to_prevent_deadlock;
	// Reply with quota reservation amount sufficient only to cover the first
	// request.
	SendReply(params,
	PP_OK,
	PpapiPluginMsg_FileSystem_ReserveQuotaReply(
	kQuotaRequestAmount1,
	FileGrowthMapToFileSizeMapForTesting(file_growths)));
	}
	ASSERT_TRUE(cb1.called());
	ASSERT_EQ(kQuotaRequestAmount1, cb1.result());
	ASSERT_FALSE(cb2.called());

	// Another request message should have been sent.
	ASSERT_TRUE(sink().GetFirstResourceCallMatching(
	PpapiHostMsg_FileSystem_ReserveQuota::ID, &params, &msg));
	sink().ClearMessages();
	{
	ProxyAutoUnlock unlock_to_prevent_deadlock;
	// Reply with quota reservation amount sufficient to cover the second
	// request and some extra.
	SendReply(params,
	PP_OK,
	PpapiPluginMsg_FileSystem_ReserveQuotaReply(
	kQuotaRequestAmount1 + kQuotaRequestAmount2,
	FileGrowthMapToFileSizeMapForTesting(file_growths)));
	}

	ASSERT_TRUE(cb2.called());
	ASSERT_EQ(kQuotaRequestAmount2, cb2.result());
	cb1.Reset();
	cb2.Reset();

	// There is kQuotaRequestAmount1 of quota left, and a request for it should
	// succeed immediately.
	result = file_system_api->RequestQuota(
	kQuotaRequestAmount1,
	base::Bind(&MockRequestQuotaCallback::Callback, base::Unretained(&cb1)));
	ASSERT_EQ(kQuotaRequestAmount1, result);
	}

	} // namespace proxy
	} // namespace ppapi