use local typescript if installed.

[magicdawn]

typescript@4 support variadic tuple type & labeled tuple about 2 month ago.
The vscode can understand the code, but tsd can not.

[voxpelli]

Agree, maybe one can use something like import-local to achieve that

[papb]

I don't think it's that easy, unfortunately, I think tsd ships with its own patched typescript implementation.

[voxpelli]

Yes, seems like it hence #62, would be good if that patching could eventually be removed and upstreamed to core, but probably easier said than done

[papb]

@voxpelli By the way, I have been using expect-type instead of tsd for a while now, has worked perfectly for me, maybe it works for your use case too.

[SamVerschueren]

Just released a new version with TypeScript@4.1 support.

I'm working on an automated solution which creates a patched TypeScript release whenever TypeScript itself creates a new release. Together with allow testing multiple TypeScript versions, it should automatically be picked up on the next test run.

I'm going to close this for now because as you said, I need a patched TS which doesn't work if I use the locally installed TypeScript version.