There's currently no testing at all for JavaScript code. We should really have a framework for unit testing, so that at least there's a well-defined way to add tests. (It should be added to the test.sh script, as well.)
From some initial research, it looks like Jest is far and away the test framework of choice for JavaScript these days. I have no reason to make an unusual choice, so let's go with Jest here.
There's currently no testing at all for JavaScript code. We should really have a framework for unit testing, so that at least there's a well-defined way to add tests. (It should be added to the test.sh script, as well.)
See #66