public void CountMessages_ShouldReturnZero_WhenResponseContainsEmptyBytes()
{
var reader = new ReceiveMessageResponseReader();
var count = reader.CountMessages(Array.Empty <byte>());
count.Should().Be(0);
}
public void CountMessages_ShouldReturnZero_WhenResponseContainsNoMessages()
{
var bytes = Encoding.UTF8.GetBytes(EmptyResponse);
var reader = new ReceiveMessageResponseReader();
var count = reader.CountMessages(bytes);
count.Should().Be(0);
}
public void TryGetNextMessageBytes_ShouldReturnAppropriateTuple_WhenResponseBytesContainsEmptyBytes()
{
var reader = new ReceiveMessageResponseReader();
var messageFound = reader.TryGetNextMessageBytes(Array.Empty <byte>(), out var messageBytes, out var endPosition);
var isDefault = messageBytes == default;
messageFound.Should().BeFalse();
isDefault.Should().BeTrue();
endPosition.Should().Be(0);
}
public void TryGetNextMessageBytes_ShouldReturnAppropriateTuple_WhenResponseBytesContainsNoMessage()
{
var bytes = Encoding.UTF8.GetBytes(EmptyResponse);
var reader = new ReceiveMessageResponseReader();
var messageFound = reader.TryGetNextMessageBytes(bytes, out var messageBytes, out var endPosition);
var isDefault = messageBytes == default;
messageFound.Should().BeFalse();
isDefault.Should().BeTrue();
endPosition.Should().Be(0);
}
public void CountMessages_ShouldNotReturnGreaterThanTen_EvenIfDataContainsMoreMessages()
{
var sb = new StringBuilder();
sb.Append(ResponseStart);
for (var i = 0; i < 15; i++) // response with 15 messages
{
sb.Append(Message);
}
sb.Append(ResponseEnd);
var bytes = Encoding.UTF8.GetBytes(sb.ToString());
var reader = new ReceiveMessageResponseReader();
var count = reader.CountMessages(bytes);
count.Should().Be(10, because: "An AWS SQS receive request returns a maximum of 10 messages");
}
public void CountMessages_ShouldReturnCorrectCount_WhenResponseContainsMessages(int messages)
{
var sb = new StringBuilder();
sb.Append(ResponseStart);
for (var i = 0; i < messages; i++)
{
sb.Append(Message);
}
sb.Append(ResponseEnd);
var bytes = Encoding.UTF8.GetBytes(sb.ToString());
var reader = new ReceiveMessageResponseReader();
var count = reader.CountMessages(bytes);
count.Should().Be(messages);
}
public void TryGetNextMessageBytes_ShouldReturnAppropriateTupleWithMessage_WhenResponseBytesContainsAMessage()
{
var sb = new StringBuilder();
sb.Append(ResponseStart);
sb.Append(Message);
sb.Append(ResponseEnd);
var bytes = Encoding.UTF8.GetBytes(sb.ToString());
var reader = new ReceiveMessageResponseReader();
var messageFound = reader.TryGetNextMessageBytes(bytes, out var messageBytes, out var endPosition);
var messageSpanIsEqual = messageBytes.SequenceEqual(Encoding.UTF8.GetBytes(Message));
messageFound.Should().BeTrue();
messageSpanIsEqual.Should().BeTrue();
endPosition.Should().Be(ResponseStart.Length + Message.Length);
}
public int CountMessages()
{
var reader = new ReceiveMessageResponseReader();
return(reader.CountMessages(_responseBytes));
}
