Re: call for more ert tests

[Eli Zaretskii]

> From: Glenn Morris <address@hidden>
> Date: Mon, 24 Jun 2013 13:31:50 -0400
> 
> One thing that could help reduce this is more unit tests.
> If you haven't used it, ERT makes it pretty easy to write tests.
> Of course, many aspects of Emacs's behaviour are not easy to test (GUI
> stuff, etc.), but many are. See test/automated/ for examples. [2]
> 
> For example, package.el seems like something that should have a test
> suite.
> 
> So if you fix a bug, please consider adding a unit test to make sure it
> does not come back. Or if you rewrite a lisp package, consider adding
> tests at the same time to check that obvious functionality still works.
> 
> I know writing tests is maybe not as interesting as writing shiny new
> features, but I think it will save work in the long run.

IMO, unless we require every new feature to come with a test and a
report that no regressions were found by running the existing tests,
we will never get any better testability than what we have now.