runtests.ts should just wrap an object

[matthews314]

The runtests.ts script is the actual access point to the testing framework for the users. By running runtests.js (the transpiled counterpart), we effectively tell the framework to inspect our project, find tests, import them and run them.

runtests.ts will grow larger, since we'll need to make it read a configuration file, add more console options... in order to allow the user to decide whether to print the results on the console or redirect the output somewhere else (e.g. XML files), to customize the way results are displayed and so on.

This means that almost all the code in runtests.ts has to be moved into a class, to allow easy dependency injection therefore enabling testing. Then, runtests.ts will only need to construct the objects its needs in order to do its thing and pass them the process.args.

Since this will become increasingly difficult while the codebase grows, the sooner I do it, the better. Also, this is the only significant portion of untested code by now, so code quality will highly benefit from solving this issue.

Since this won't change the behavior of the framework, this will just cause the patch version number to increase.

[matthews314]

At the moment, runtests calls "runAllAndLog()" on the TestCase instance created from the test class at hand.
That method was bound to TestCase just because it was convenient to do so before. After wrapping runtests into a class, it would be much more convenient to move the runAllAndLog implementation in there, so that a TestSuite is created by runtests, not by the TestCase itself (which shouldn't even be aware of the existance of TestSuites).