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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 <string>
#include "base/memory/scoped_ptr.h"
#include "base/stl_util.h"
#include "base/string_number_conversions.h"
#include "remoting/proto/event.pb.h"
#include "remoting/proto/internal.pb.h"
#include "remoting/protocol/message_decoder.h"
#include "remoting/protocol/util.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace remoting {
namespace protocol {
static const unsigned int kTestKey = 142;
static void AppendMessage(const EventMessage& msg,
std::string* buffer) {
// Contains one encoded message.
scoped_refptr<net::IOBufferWithSize> encoded_msg;
encoded_msg = SerializeAndFrameMessage(msg);
buffer->append(encoded_msg->data(), encoded_msg->size());
}
// Construct and prepare data in the |output_stream|.
static void PrepareData(uint8** buffer, int* size) {
// Contains all encoded messages.
std::string encoded_data;
// Then append 10 update sequences to the data.
for (int i = 0; i < 10; ++i) {
EventMessage msg;
msg.set_sequence_number(i);
msg.mutable_key_event()->set_usb_keycode(kTestKey + i);
msg.mutable_key_event()->set_pressed((i % 2) != 0);
AppendMessage(msg, &encoded_data);
}
*size = encoded_data.length();
*buffer = new uint8[*size];
memcpy(*buffer, encoded_data.c_str(), *size);
}
void SimulateReadSequence(const int read_sequence[], int sequence_size) {
// Prepare encoded data for testing.
int size;
uint8* test_data;
PrepareData(&test_data, &size);
scoped_array<uint8> memory_deleter(test_data);
// Then simulate using MessageDecoder to decode variable
// size of encoded data.
// The first thing to do is to generate a variable size of data. This is done
// by iterating the following array for read sizes.
MessageDecoder decoder;
// Then feed the protocol decoder using the above generated data and the
// read pattern.
std::list<EventMessage*> message_list;
for (int pos = 0; pos < size;) {
SCOPED_TRACE("Input position: " + base::IntToString(pos));
// First generate the amount to feed the decoder.
int read = std::min(size - pos, read_sequence[pos % sequence_size]);
// And then prepare an IOBuffer for feeding it.
scoped_refptr<net::IOBuffer> buffer(new net::IOBuffer(read));
memcpy(buffer->data(), test_data + pos, read);
decoder.AddData(buffer, read);
while (true) {
scoped_ptr<CompoundBuffer> message(decoder.GetNextMessage());
if (!message.get())
break;
EventMessage* event = new EventMessage();
CompoundBufferInputStream stream(message.get());
ASSERT_TRUE(event->ParseFromZeroCopyStream(&stream));
message_list.push_back(event);
}
pos += read;
}
// Then verify the decoded messages.
EXPECT_EQ(10u, message_list.size());
unsigned int index = 0;
for (std::list<EventMessage*>::iterator it =
message_list.begin();
it != message_list.end(); ++it) {
SCOPED_TRACE("Message " + base::IntToString(index));
EventMessage* message = *it;
// Partial update stream.
EXPECT_TRUE(message->has_key_event());
// TODO(sergeyu): Don't use index here. Instead store the expected values
// in an array.
EXPECT_EQ(kTestKey + index, message->key_event().usb_keycode());
EXPECT_EQ((index % 2) != 0, message->key_event().pressed());
++index;
}
STLDeleteElements(&message_list);
}
TEST(MessageDecoderTest, SmallReads) {
const int kReads[] = {1, 2, 3, 1};
SimulateReadSequence(kReads, arraysize(kReads));
}
TEST(MessageDecoderTest, LargeReads) {
const int kReads[] = {50, 50, 5};
SimulateReadSequence(kReads, arraysize(kReads));
}
TEST(MessageDecoderTest, EmptyReads) {
const int kReads[] = {4, 0, 50, 0};
SimulateReadSequence(kReads, arraysize(kReads));
}
} // namespace protocol
} // namespace remoting
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