How can I add log messages to an NUnit test that will appear in a nant build execution?

Question

With NUnit, if you add Debug.Print statements in your tests they appear in the test output. (At least they do in the ReSharper unit test window.)

When using a NAnt build

Answer 1

NUnit 3's way of logging during a test is via the TestContext class. It has a raft of static Write variants. Each emits general content to the test result.

TestContext.Out yields a TextWriter that can also be used to emit logging information into test results.

Answer 2

Console.WriteLine() should be preserved (it is for my version of NUnit at least).

That said, consider - each time you want to add some text output - how you could turn it into an assertion with a message. Your tests will get much better.