[Feature]: Display Error's cause when test has failed

[Nokel81]

🚀 Feature Proposal

JS's Error class has recently been enhanced with native support for chaining instances together during construction using a second parameter and the { cause: parentErrorInstance } option.

It would be great if when a test fails because of a throw error the cause of the error would also be displayed.

Motivation

When wrapping errors the cause can give a lot of necessary information to help figure out why a test is failing

Example

N/A, this would just change the default formatter on test failure

Pitch

The changes to Error are part of the ECMAScript standard and are available in Node 16 so more people will start using them.

[SimenB]

Agreed. We should also try to print all of an AggregateError's errors as well.

Do you wanna send a PR for this? Our error formatting mostly lives in https://github.com/facebook/jest/blob/fd4bfbdb1f8f7620c9da543bd68c2251bd347cdb/packages/jest-message-util/src/index.ts

[Nokel81]

I have tried looking at the code in that file but am having trouble understanding how it fits into error causes stuff it seems to be just trying to parse already formatted stack traces.

[github-actions]

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[Nokel81]

This is still relevant

[SimenB]

Wanna send a PR? 🙂

[SimenB]

https://github.com/facebook/jest/releases/tag/v29.4.3

[github-actions]

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