The need to justify multiple threads

So far in this chapter, you’ve learned how to write tests that use multiple threads and how to use these extra threads to test the logging library. The logging library doesn’t use multiple threads itself, but we needed to make sure that the logging library is safe to use with multiple threads.

The remainder of this chapter will provide some guidance on how to test code that does use multiple threads. To test multi-threaded code, we need some code that uses multiple threads. For this, we’ll use the SimpleService project from the previous chapter.

We need to modify the simple service so that it uses multiple threads. Right now, the simple service is an example of a greeting service that responds to a greeting request with a reply based on the user making the request being identified. There’s not much of a need for multiple threads in a greeting service. We’re going to need something different.

This brings...