Running matrix-react-sdk's yarn test consumes all memory & CPU

[AndrewFerr]

Steps to reproduce

1. Clone matrix-react-sdk & build it
2. Run yarn test

Outcome

What did you expect?

That the tests would run and finish.

What happened instead?

The tests quickly ballooned in memory & CPU usage and brought my PC to a freeze.

Even when closing most other programs, memory usage was still high enough to trigger the OS to end some of the test processes -- and not even that was enough to prevent my PC from freezing.

Operating system

Fedora Linux 38 (Workstation Edition)

Application version

matrix-react-sdk 3.82.0

How did you install the app?

From source

Homeserver

N/A

Will you send logs?

No

[t3chguy]

I suggest passing --runInBand to use less resources.

[AndrewFerr]

Works like a charm, thanks!