public void Buffer_get_should_return_expected_result()
{
var mockBuffer = new Mock<IByteBuffer>();
var subject = new ByteBufferStream(mockBuffer.Object);
var result = subject.Buffer;
result.Should().BeSameAs(mockBuffer.Object);
}
public void Buffer_get_should_return_expected_result()
{
var buffer = Substitute.For<IByteBuffer>();
var subject = new ByteBufferStream(buffer);
var result = subject.Buffer;
result.Should().BeSameAs(buffer);
}
/// <summary>
/// Writes a raw BSON document.
/// </summary>
/// <param name="slice">The byte buffer containing the raw BSON document.</param>
public virtual void WriteRawBsonDocument(IByteBuffer slice)
{
// overridden in BsonBinaryWriter to write the raw bytes to the stream
// for all other streams, deserialize the raw bytes and serialize the resulting document instead
using (var stream = new ByteBufferStream(slice, ownsByteBuffer: false))
using (var bsonReader = new BsonBinaryReader(stream, BsonBinaryReaderSettings.Defaults))
{
var deserializationContext = BsonDeserializationContext.CreateRoot <BsonDocument>(bsonReader);
var document = BsonDocumentSerializer.Instance.Deserialize(deserializationContext);
var serializationContext = BsonSerializationContext.CreateRoot <BsonDocument>(this);
BsonDocumentSerializer.Instance.Serialize(serializationContext, document);
}
}
private void ProcessReplyMessage(CommandState state, ResponseMessage message, IByteBuffer buffer, ConnectionId connectionId, MessageEncoderSettings encoderSettings)
{
state.Stopwatch.Stop();
bool disposeOfDocuments = false;
var replyMessage = message as ReplyMessage<RawBsonDocument>;
if (replyMessage == null)
{
// ReplyMessage is generic, which means that we can't use it here, so, we need to use a different one...
using (var stream = new ByteBufferStream(buffer, ownsBuffer: false))
{
var encoderFactory = new BinaryMessageEncoderFactory(stream, encoderSettings);
replyMessage = (ReplyMessage<RawBsonDocument>)encoderFactory
.GetReplyMessageEncoder(RawBsonDocumentSerializer.Instance)
.ReadMessage();
disposeOfDocuments = true;
}
}
try
{
if (replyMessage.CursorNotFound ||
replyMessage.QueryFailure ||
(state.ExpectedResponseType != ExpectedResponseType.Query && replyMessage.Documents.Count == 0))
{
var queryFailureDocument = replyMessage.QueryFailureDocument;
if (__securitySensitiveCommands.Contains(state.CommandName))
{
queryFailureDocument = new BsonDocument();
}
if (_failedEvent != null)
{
_failedEvent(new CommandFailedEvent(
state.CommandName,
new MongoCommandException(
connectionId,
string.Format("{0} command failed", state.CommandName),
null,
queryFailureDocument),
state.OperationId,
replyMessage.ResponseTo,
connectionId,
state.Stopwatch.Elapsed));
}
}
else
{
switch (state.ExpectedResponseType)
{
case ExpectedResponseType.Command:
ProcessCommandReplyMessage(state, replyMessage, connectionId);
break;
case ExpectedResponseType.GLE:
ProcessGLEReplyMessage(state, replyMessage, connectionId);
break;
case ExpectedResponseType.Query:
ProcessQueryReplyMessage(state, replyMessage, connectionId);
break;
}
}
}
finally
{
if (disposeOfDocuments && replyMessage.Documents != null)
{
replyMessage.Documents.ForEach(d => d.Dispose());
}
}
}
/// <summary>
/// Writes a raw BSON array.
/// </summary>
/// <param name="slice">The byte buffer containing the raw BSON array.</param>
public virtual void WriteRawBsonArray(IByteBuffer slice)
{
// overridden in BsonBinaryWriter to write the raw bytes to the stream
// for all other streams, deserialize the raw bytes and serialize the resulting array instead
using (var chunkSource = new InputBufferChunkSource(BsonChunkPool.Default))
using (var buffer = new MultiChunkBuffer(chunkSource))
using (var stream = new ByteBufferStream(buffer))
{
// wrap the array in a fake document so we can deserialize it
var documentLength = slice.Length + 8;
buffer.EnsureCapacity(documentLength);
stream.WriteInt32(documentLength);
stream.WriteBsonType(BsonType.Array);
stream.WriteByte((byte)'x');
stream.WriteByte(0);
stream.WriteSlice(slice);
stream.WriteByte(0);
buffer.MakeReadOnly();
stream.Position = 0;
using (var reader = new BsonBinaryReader(stream, BsonBinaryReaderSettings.Defaults))
{
var deserializationContext = BsonDeserializationContext.CreateRoot(reader);
reader.ReadStartDocument();
reader.ReadName("x");
var array = BsonArraySerializer.Instance.Deserialize(deserializationContext);
reader.ReadEndDocument();
var serializationContext = BsonSerializationContext.CreateRoot(this);
BsonArraySerializer.Instance.Serialize(serializationContext, array);
}
}
}
/// <summary>
/// Writes a raw BSON document.
/// </summary>
/// <param name="slice">The byte buffer containing the raw BSON document.</param>
public virtual void WriteRawBsonDocument(IByteBuffer slice)
{
// overridden in BsonBinaryWriter to write the raw bytes to the stream
// for all other streams, deserialize the raw bytes and serialize the resulting document instead
using (var stream = new ByteBufferStream(slice, ownsBuffer: false))
using (var bsonReader = new BsonBinaryReader(stream, BsonBinaryReaderSettings.Defaults))
{
var deserializationContext = BsonDeserializationContext.CreateRoot(bsonReader);
var document = BsonDocumentSerializer.Instance.Deserialize(deserializationContext);
var serializationContext = BsonSerializationContext.CreateRoot(this);
BsonDocumentSerializer.Instance.Serialize(serializationContext, document);
}
}
/// <summary>
/// Gets an enumerator that can enumerate the elements of the array.
/// </summary>
/// <returns>An enumerator.</returns>
public override IEnumerator<BsonValue> GetEnumerator()
{
ThrowIfDisposed();
using (var stream = new ByteBufferStream(_slice, ownsBuffer: false))
using (var bsonReader = new BsonBinaryReader(stream, _readerSettings))
{
var context = BsonDeserializationContext.CreateRoot(bsonReader);
bsonReader.ReadStartDocument();
while (bsonReader.ReadBsonType() != BsonType.EndOfDocument)
{
bsonReader.SkipName();
yield return DeserializeBsonValue(context);
}
bsonReader.ReadEndDocument();
}
}
/// <summary>
/// Materializes the RawBsonDocument into a regular BsonDocument.
/// </summary>
/// <param name="binaryReaderSettings">The binary reader settings.</param>
/// <returns>A BsonDocument.</returns>
public BsonDocument Materialize(BsonBinaryReaderSettings binaryReaderSettings)
{
ThrowIfDisposed();
using (var stream = new ByteBufferStream(_slice, ownsBuffer: false))
using (var reader = new BsonBinaryReader(stream, binaryReaderSettings))
{
var context = BsonDeserializationContext.CreateRoot(reader);
return BsonDocumentSerializer.Instance.Deserialize(context);
}
}
public void constructor_should_initialize_subject(
[Values(false, true)]
bool ownsBuffer)
{
var length = 123;
var mockBuffer = new Mock<IByteBuffer>();
mockBuffer.SetupGet(s => s.Length).Returns(length);
var subject = new ByteBufferStream(mockBuffer.Object, ownsBuffer);
var reflector = new Reflector(subject);
subject.Buffer.Should().BeSameAs(mockBuffer.Object);
subject.Length.Should().Be(length);
subject.Position.Should().Be(0);
reflector._disposed.Should().BeFalse();
reflector._ownsBuffer.Should().Be(ownsBuffer);
}
/// <summary>
/// Tests whether the array contains a value.
/// </summary>
/// <param name="value">The value to test for.</param>
/// <returns>True if the array contains the value.</returns>
public override bool Contains(BsonValue value)
{
ThrowIfDisposed();
using (var stream = new ByteBufferStream(_slice, ownsBuffer: false))
using (var bsonReader = new BsonBinaryReader(stream, _readerSettings))
{
var context = BsonDeserializationContext.CreateRoot(bsonReader);
bsonReader.ReadStartDocument();
while (bsonReader.ReadBsonType() != BsonType.EndOfDocument)
{
bsonReader.SkipName();
if (DeserializeBsonValue(context).Equals(value))
{
return true;
}
}
bsonReader.ReadEndDocument();
return false;
}
}
public ResponseMessage DecodeMessage(IByteBuffer buffer, IMessageEncoderSelector encoderSelector, CancellationToken cancellationToken)
{
cancellationToken.ThrowIfCancellationRequested();
_stopwatch.Stop();
_networkDuration = _stopwatch.Elapsed;
ResponseMessage message;
_stopwatch.Restart();
using (var stream = new ByteBufferStream(buffer, ownsBuffer: false))
{
var encoderFactory = new BinaryMessageEncoderFactory(stream, _messageEncoderSettings);
var encoder = encoderSelector.GetEncoder(encoderFactory);
message = (ResponseMessage)encoder.ReadMessage();
}
_stopwatch.Stop();
_deserializationDuration = _stopwatch.Elapsed;
return message;
}
/// <summary>
/// Tests whether the document contains an element with the specified name.
/// </summary>
/// <param name="name">The name of the element to look for.</param>
/// <returns>
/// True if the document contains an element with the specified name.
/// </returns>
public override bool Contains(string name)
{
if (name == null)
{
throw new ArgumentNullException("name");
}
ThrowIfDisposed();
using (var stream = new ByteBufferStream(_slice, ownsBuffer: false))
using (var bsonReader = new BsonBinaryReader(stream, _readerSettings))
{
bsonReader.ReadStartDocument();
while (bsonReader.ReadBsonType() != BsonType.EndOfDocument)
{
if (bsonReader.ReadName() == name)
{
return true;
}
bsonReader.SkipValue();
}
bsonReader.ReadEndDocument();
return false;
}
}
public async Task<ResponseMessage> ReceiveMessageAsync(
int responseTo,
IMessageEncoderSelector encoderSelector,
MessageEncoderSettings messageEncoderSettings,
CancellationToken cancellationToken)
{
Ensure.IsNotNull(encoderSelector, nameof(encoderSelector));
ThrowIfDisposedOrNotOpen();
try
{
if (_receivingMessageEventHandler != null)
{
_receivingMessageEventHandler(new ConnectionReceivingMessageEvent(_connectionId, responseTo, EventContext.OperationId));
}
ResponseMessage reply;
var stopwatch = Stopwatch.StartNew();
using (var buffer = await ReceiveBufferAsync(responseTo, cancellationToken).ConfigureAwait(false))
{
stopwatch.Stop();
var networkDuration = stopwatch.Elapsed;
cancellationToken.ThrowIfCancellationRequested();
stopwatch.Restart();
using (var stream = new ByteBufferStream(buffer))
{
var encoderFactory = new BinaryMessageEncoderFactory(stream, messageEncoderSettings);
var encoder = encoderSelector.GetEncoder(encoderFactory);
reply = (ResponseMessage)encoder.ReadMessage();
}
stopwatch.Stop();
if (_commandEventHelper.ShouldCallAfterReceiving)
{
_commandEventHelper.AfterReceiving(reply, buffer, _connectionId, messageEncoderSettings);
}
if (_receivedMessageEventHandler != null)
{
_receivedMessageEventHandler(new ConnectionReceivedMessageEvent(_connectionId, responseTo, buffer.Length, networkDuration, stopwatch.Elapsed, EventContext.OperationId));
}
}
return reply;
}
catch (Exception ex)
{
if (_commandEventHelper.ShouldCallErrorReceiving)
{
_commandEventHelper.ErrorReceiving(responseTo, _connectionId, ex);
}
if (_failedReceivingMessageEventHandler != null)
{
_failedReceivingMessageEventHandler(new ConnectionReceivingMessageFailedEvent(_connectionId, responseTo, ex, EventContext.OperationId));
}
throw;
}
}
public async Task SendMessagesAsync(IEnumerable<RequestMessage> messages, MessageEncoderSettings messageEncoderSettings, CancellationToken cancellationToken)
{
Ensure.IsNotNull(messages, nameof(messages));
ThrowIfDisposedOrNotOpen();
var messagesToSend = messages.ToList();
var requestIds = messagesToSend.Select(x => x.RequestId).ToList();
try
{
if (_sendingMessagesEventHandler != null)
{
_sendingMessagesEventHandler(new ConnectionSendingMessagesEvent(_connectionId, requestIds, EventContext.OperationId));
}
cancellationToken.ThrowIfCancellationRequested();
var stopwatch = Stopwatch.StartNew();
var outputBufferChunkSource = new OutputBufferChunkSource(BsonChunkPool.Default);
using (var buffer = new MultiChunkBuffer(outputBufferChunkSource))
{
using (var stream = new ByteBufferStream(buffer, ownsBuffer: false))
{
var encoderFactory = new BinaryMessageEncoderFactory(stream, messageEncoderSettings);
foreach (var message in messagesToSend)
{
if (message.ShouldBeSent == null || message.ShouldBeSent())
{
var encoder = message.GetEncoder(encoderFactory);
encoder.WriteMessage(message);
message.WasSent = true;
}
// Encoding messages includes serializing the
// documents, so encoding message could be expensive
// and worthy of us honoring cancellation here.
cancellationToken.ThrowIfCancellationRequested();
}
buffer.Length = (int)stream.Length;
buffer.MakeReadOnly();
}
var serializationDuration = stopwatch.Elapsed;
if (_commandEventHelper.ShouldCallBeforeSending)
{
_commandEventHelper.BeforeSending(
messages,
_connectionId,
buffer,
messageEncoderSettings,
stopwatch);
}
var stopwatchCheckPoint = stopwatch.Elapsed;
await SendBufferAsync(buffer, cancellationToken).ConfigureAwait(false);
var networkDuration = stopwatch.Elapsed - stopwatchCheckPoint;
if (_commandEventHelper.ShouldCallAfterSending)
{
_commandEventHelper.AfterSending(messages, _connectionId);
}
if (_sentMessagesEventHandler != null)
{
_sentMessagesEventHandler(new ConnectionSentMessagesEvent(_connectionId, requestIds, buffer.Length, networkDuration, serializationDuration, EventContext.OperationId));
}
}
}
catch (Exception ex)
{
if (_commandEventHelper.ShouldCallErrorSending)
{
_commandEventHelper.ErrorSending(messages, _connectionId, ex);
}
if (_failedSendingMessagesEvent != null)
{
_failedSendingMessagesEvent(new ConnectionSendingMessagesFailedEvent(_connectionId, requestIds, ex, EventContext.OperationId));
}
throw;
}
}
public void PrepareToWrite_should_throw_when_stream_would_exceed_2GB()
{
using (var buffer = new MultiChunkBuffer(BsonChunkPool.Default))
using (var subject = new ByteBufferStream(buffer))
{
var bytes = new byte[int.MaxValue / 2 + 1024];
subject.Write(bytes, 0, bytes.Length);
Action action = () => subject.Write(bytes, 0, bytes.Length); // indirectly calls private PrepareToWrite method
action.ShouldThrow<IOException>();
}
}
public void ThrowIfEndOfStream_should_throw_when_position_plus_length_exceeds_2GB()
{
using (var buffer = new ByteArrayBuffer(new byte[1024]))
using (var subject = new ByteBufferStream(buffer))
{
subject.Position = 1024;
subject.WriteInt32(int.MaxValue - 128);
subject.Position = 1024;
Action action = () => subject.ReadSlice(); // indirectly calls private ThrowIfEndOfStream method
action.ShouldThrow<EndOfStreamException>();
}
}
public void ReadSlice_should_return_expected_result(int length, byte[] bytes)
{
var mockBuffer = new Mock<IByteBuffer>();
mockBuffer.Setup(s => s.AccessBackingBytes(It.IsAny<int>())).Returns((int p) => { return new ArraySegment<byte>(bytes, p, bytes.Length - p); });
mockBuffer.SetupGet(s => s.IsReadOnly).Returns(true);
mockBuffer.SetupGet(s => s.Length).Returns(bytes.Length);
var subject = new ByteBufferStream(mockBuffer.Object);
var expectedPosition = length;
subject.ReadSlice();
subject.Position.Should().Be(expectedPosition);
mockBuffer.Verify(b => b.GetSlice(0, bytes.Length), Times.Once);
}
public void BeforeSending(IEnumerable<RequestMessage> messages, ConnectionId connectionId, IByteBuffer buffer, MessageEncoderSettings encoderSettings, Stopwatch stopwatch)
{
using (var stream = new ByteBufferStream(buffer, ownsBuffer: false))
{
var messageQueue = new Queue<RequestMessage>(messages);
while (messageQueue.Count > 0)
{
ProcessRequestMessages(messageQueue, connectionId, stream, encoderSettings, stopwatch);
}
}
}
/// <summary>
/// Tries to get the value of an element of this document.
/// </summary>
/// <param name="name">The name of the element.</param>
/// <param name="value">The value of the element.</param>
/// <returns>
/// True if an element with that name was found.
/// </returns>
public override bool TryGetValue(string name, out BsonValue value)
{
ThrowIfDisposed();
using (var stream = new ByteBufferStream(_slice, ownsBuffer: false))
using (var bsonReader = new BsonBinaryReader(stream, _readerSettings))
{
var context = BsonDeserializationContext.CreateRoot(bsonReader);
bsonReader.ReadStartDocument();
while (bsonReader.ReadBsonType() != BsonType.EndOfDocument)
{
if (bsonReader.ReadName() == name)
{
value = DeserializeBsonValue(context);
return true;
}
bsonReader.SkipValue();
}
bsonReader.ReadEndDocument();
value = null;
return false;
}
}
private IEnumerable<BsonElement> MaterializeThisLevel()
{
var elements = new List<BsonElement>();
using (var stream = new ByteBufferStream(_slice, ownsBuffer: false))
using (var bsonReader = new BsonBinaryReader(stream, _readerSettings))
{
var context = BsonDeserializationContext.CreateRoot(bsonReader);
bsonReader.ReadStartDocument();
BsonType bsonType;
while ((bsonType = bsonReader.ReadBsonType()) != BsonType.EndOfDocument)
{
var name = bsonReader.ReadName();
BsonValue value;
switch (bsonType)
{
case BsonType.Array: value = DeserializeLazyBsonArray(bsonReader); break;
case BsonType.Document: value = DeserializeLazyBsonDocument(bsonReader); break;
default: value = BsonValueSerializer.Instance.Deserialize(context); break;
}
elements.Add(new BsonElement(name, value));
}
bsonReader.ReadEndDocument();
}
return elements;
}
public void Dispose_should_dispose_buffer_if_it_owns_it(
[Values(false, true)]
bool ownsBuffer)
{
var mockBuffer = new Mock<IByteBuffer>();
var subject = new ByteBufferStream(mockBuffer.Object, ownsBuffer: ownsBuffer);
subject.Dispose();
mockBuffer.Verify(s => s.Dispose(), Times.Exactly(ownsBuffer ? 1 : 0));
}
public IByteBuffer EncodeMessages(CancellationToken cancellationToken)
{
cancellationToken.ThrowIfCancellationRequested();
var serializationStopwatch = Stopwatch.StartNew();
var outputBufferChunkSource = new OutputBufferChunkSource(BsonChunkPool.Default);
var buffer = new MultiChunkBuffer(outputBufferChunkSource);
using (var stream = new ByteBufferStream(buffer, ownsBuffer: false))
{
var encoderFactory = new BinaryMessageEncoderFactory(stream, _messageEncoderSettings);
foreach (var message in _messages)
{
if (message.ShouldBeSent == null || message.ShouldBeSent())
{
var encoder = message.GetEncoder(encoderFactory);
encoder.WriteMessage(message);
message.WasSent = true;
}
// Encoding messages includes serializing the
// documents, so encoding message could be expensive
// and worthy of us honoring cancellation here.
cancellationToken.ThrowIfCancellationRequested();
}
buffer.Length = (int)stream.Length;
buffer.MakeReadOnly();
}
serializationStopwatch.Stop();
_serializationDuration = serializationStopwatch.Elapsed;
return buffer;
}
public void constructor_should_initialize_subject(
[Values(false, true)]
bool ownsBuffer)
{
var length = 123;
var buffer = Substitute.For<IByteBuffer>();
buffer.Length.Returns(length);
var subject = new ByteBufferStream(buffer, ownsBuffer);
var reflector = new Reflector(subject);
subject.Buffer.Should().BeSameAs(buffer);
subject.Length.Should().Be(length);
subject.Position.Should().Be(0);
reflector._disposed.Should().BeFalse();
reflector._ownsBuffer.Should().Be(ownsBuffer);
}
/// <summary>
/// Gets an element of this document.
/// </summary>
/// <param name="index">The zero based index of the element.</param>
/// <returns>
/// The element.
/// </returns>
public override BsonElement GetElement(int index)
{
if (index < 0)
{
throw new ArgumentOutOfRangeException("index");
}
ThrowIfDisposed();
using (var stream = new ByteBufferStream(_slice, ownsBuffer: false))
using (var bsonReader = new BsonBinaryReader(stream, _readerSettings))
{
var context = BsonDeserializationContext.CreateRoot(bsonReader);
bsonReader.ReadStartDocument();
var i = 0;
while (bsonReader.ReadBsonType() != BsonType.EndOfDocument)
{
if (i == index)
{
var name = bsonReader.ReadName();
var value = DeserializeBsonValue(context);
return new BsonElement(name, value);
}
bsonReader.SkipName();
bsonReader.SkipValue();
i++;
}
bsonReader.ReadEndDocument();
throw new ArgumentOutOfRangeException("index");
}
}
public Reflector(ByteBufferStream instance)
{
_instance = instance;
}
// public indexers
/// <summary>
/// Gets or sets a value by position.
/// </summary>
/// <param name="index">The position.</param>
/// <returns>The value.</returns>
public override BsonValue this[int index]
{
get
{
if (index < 0)
{
throw new ArgumentOutOfRangeException("index");
}
ThrowIfDisposed();
using (var stream = new ByteBufferStream(_slice, ownsBuffer: false))
using (var bsonReader = new BsonBinaryReader(stream, _readerSettings))
{
bsonReader.ReadStartDocument();
var i = 0;
while (bsonReader.ReadBsonType() != BsonType.EndOfDocument)
{
bsonReader.SkipName();
if (i == index)
{
var context = BsonDeserializationContext.CreateRoot(bsonReader);
return DeserializeBsonValue(context);
}
bsonReader.SkipValue();
i++;
}
bsonReader.ReadEndDocument();
throw new ArgumentOutOfRangeException("index");
}
}
set
{
throw new NotSupportedException("RawBsonArray instances are immutable.");
}
}
public void Dispose_should_dispose_buffer_if_it_owns_it(
[Values(false, true)]
bool ownsBuffer)
{
var buffer = Substitute.For<IByteBuffer>();
var subject = new ByteBufferStream(buffer, ownsBuffer: ownsBuffer);
subject.Dispose();
buffer.Received(ownsBuffer ? 1 : 0).Dispose();
}
public override void CopyTo(object[] array, int arrayIndex)
{
ThrowIfDisposed();
using (var stream = new ByteBufferStream(_slice, ownsBuffer: false))
using (var bsonReader = new BsonBinaryReader(stream, _readerSettings))
{
var context = BsonDeserializationContext.CreateRoot(bsonReader);
bsonReader.ReadStartDocument();
while (bsonReader.ReadBsonType() != BsonType.EndOfDocument)
{
bsonReader.SkipName();
array[arrayIndex++] = DeserializeBsonValue(context).RawValue;
}
bsonReader.ReadEndDocument();
}
}
public void ReadSlice_should_return_expected_result(int length, byte[] bytes)
{
var buffer = Substitute.For<IByteBuffer>();
buffer.AccessBackingBytes(Arg.Any<int>()).Returns(x => { var p = (int)x[0]; return new ArraySegment<byte>(bytes, p, bytes.Length - p); });
buffer.IsReadOnly.Returns(true);
buffer.Length.Returns(bytes.Length);
var subject = new ByteBufferStream(buffer);
var expectedPosition = length;
subject.ReadSlice();
subject.Position.Should().Be(expectedPosition);
subject.Buffer.Received(1).GetSlice(0, bytes.Length);
}
/// <summary>
/// Gets the index of a value in the array.
/// </summary>
/// <param name="value">The value to search for.</param>
/// <param name="index">The zero based index at which to start the search.</param>
/// <param name="count">The number of elements to search.</param>
/// <returns>The zero based index of the value (or -1 if not found).</returns>
public override int IndexOf(BsonValue value, int index, int count)
{
ThrowIfDisposed();
using (var stream = new ByteBufferStream(_slice, ownsBuffer: false))
using (var bsonReader = new BsonBinaryReader(stream, _readerSettings))
{
var context = BsonDeserializationContext.CreateRoot(bsonReader);
bsonReader.ReadStartDocument();
var i = 0;
while (bsonReader.ReadBsonType() != BsonType.EndOfDocument)
{
bsonReader.SkipName();
if (i >= index)
{
if (count == 0)
{
return -1;
}
if (DeserializeBsonValue(context).Equals(value))
{
return i;
}
count--;
}
else
{
bsonReader.SkipValue();
}
i++;
}
bsonReader.ReadEndDocument();
return -1;
}
}
public void Test20KDocument()
{
// manufacture an approximately 20K document using 200 strings each 100 characters long
// it's enough to cause the document to straddle a chunk boundary
var document = new BsonDocument();
var value = new string('x', 100);
for (int i = 0; i < 200; i++)
{
var name = i.ToString();
document.Add(name, value);
}
// round trip tests
var bson = document.ToBson();
var rehydrated = BsonSerializer.Deserialize<BsonDocument>(bson);
Assert.IsTrue(bson.SequenceEqual(rehydrated.ToBson()));
// test failure mode when 20 bytes are truncated from the buffer
using (var byteBuffer = new MultiChunkBuffer(BsonChunkPool.Default))
using (var byteBufferStream = new ByteBufferStream(byteBuffer, ownsBuffer: true))
{
using (var memoryStream = new MemoryStream(bson))
{
memoryStream.CopyTo(byteBufferStream);
}
byteBufferStream.SetLength(byteBufferStream.Length - 20);
byteBufferStream.Position = 0;
using (var bsonReader = new BsonBinaryReader(byteBufferStream))
{
Assert.Throws<EndOfStreamException>(() => BsonSerializer.Deserialize<BsonDocument>(bsonReader));
}
}
}