All messages from EventListenerTextWriter goes to console output independent on stream name

I want to put some hidden message from test to ITestEventListener extensions.

public void Test()
{
  (new NUnit.Framework.Internal.Execution.EventListenerTextWriter("DiagnosticStream", System.IO.TextWriter.Null)).WriteLine("This is message from custom stream");
}

But this message also goes to console output. Is there some way to accomplish my needs?

[CharliePoole]

If I were doing this, I would model it after TextOutput, but I would not use TextOutput.

[Reasons for not using TextOutput:

1. TextOutput is for outputting text. Adding some special arg to text output to indicate it is not really text output confuses the API for the majority of users, merely to make this easy to implement.
2. Duplicating the logic in TextOutput in another class is a very small duplication and it may not remain a duplication as the feature evolves because the purpose of a feature is what drives (or should drive) change.]

Anyway, I would create the following pieces:

1. Define a new xml element to represent the message. I would have this reviewed by the team before implementing since it’s the most important piece.

2. A way to create this message: probably a new constructor or a property of EventListenerTextWriter that specifies a different XML element to use.

3. A mechanism to send a message to a particular extension or other engine component. For example TestContext.SendMessage(string destination, string message);

Provided we are not handling the messages in the engine itself, but only in extensions, no more is needed. All NUnit components will ignore the new XML element.

Again… the first piece is the critical one and it will go easier if it’s reviewed first as a design element. The rest can be handled through code review.

[jnm2]

Closed by https://github.com/nunit/nunit/pull/3018. Thanks, Nikolay!