Currently, the test runner’s reporting code is pretty fixed. There’s no way to configure it or switch it out. This might be a problem, for example, with sending output to a text file on a Continuous Integration (CI) environment, since text files don’t support ANSI escape codes.
In this chapter we’ll implement a system for supporting different output mechanisms for test reports. We’ll do this by writing a basic event dispatcher that will allow us to dispatch events to a reporter.
You’ll learn
How the observer pattern can be applied to ...
