All tests which ran on GitHub Actions passed. AppVeyor and Travis CI won't succeed because I've deleted their configuration files.

Nice work!

Could you undelete the Travis and AppVeyor files please? I'd like to run them side by side for a while before decommissioning (though I'll probably not require them to pass before merging; just interested in looking at the difference)

I will.

While this question is not related to this PR, are there any plans for migrating the comparison tests to snapshot tests with Jest?

are there any plans for migrating the comparison tests to snapshot tests with Jest?

Great question! I've long pondered doing something like that. It looks like webpack uses jest:

https://github.com/webpack/webpack/blob/master/package.json#L122

I guess the problems to solve here are:

• the output contains file paths and escaped file paths and similar. That's what all this stuff is about: https://github.com/TypeStrong/ts-loader/blob/master/test/comparison-tests/create-and-execute-test.js#L379 - we'd need a way to perform similar regex voodoo on the jest snapshots
• the comparison test pack has the concept of "patches". Which means applying a series of changes to the source files so we can trigger the compilation again and harvest output once again. Finding a way (and I'm sure there is) to plug Jest snapshots into that as well.

If you wanted to take a look, we'd greatly appreciate it! 🌻❤️

Yes, I know. And, can this PR be merged?

Nice work! Thank you 😄

Assuming all goes well we'll look to drop AppVeyor soon