Add support for Error cause

[dubzzz]

At the moment, the extension does not seem to provide support for Errors coming with an explicit cause. Here is what I get on VSCode at the moment when throwing such Error:

It would be awesome if Vitest extension could not only report the Error, but also its causes (possibly many). Some libraries such as fast-check makes intensive usage of the causes to wrap original errors (often linked to calls to expect) into library specific errors.

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If such feature makes sense and given enough pointers, I'd be happy to given an hand

[sheremet-va]

Is it not printed when you click on the error?

[dubzzz]

I don't thinks so...

In Test results tab

I get def but not its cause. I'd probably have expected the cause to be listed right after def in this display.

[sheremet-va]

This does sound like a bug. If you want to contribute, the error is built here:

vscode/packages/extension/src/runner.ts

Line 609 in a428472

function getErrorMessage(error: TestError) {

For the red arrow, vscode takes a limited amount of text and everything else is showed when clicked