Detox hangs on circleci

[Angry-Potato]

Description

Installed Detox 7.3.5 in a RN project, configured with jest as the test runner. Runs fine locally, all tests pass in a speedy fashion. The tests never pass on circleci, detox appears to hang as the debug sync output reports it as forever busy. My hunch is that this is a side effect of the very low spec circleci macos box but it would be nice to have some validation.

Steps to Reproduce

1. Create a RN project.
2. Add Detox (not sure if jest runner is part of the issue).
3. Create rudimentary detox test suite.
4. Verify tests pass locally.
5. Add project to circleci.
6. Watch detox hang in circleci build.

Example repo: https://github.com/Angry-Potato/detox-testing

Detox, Node, Device, Xcode and macOS Versions

• Detox: 7.3.3
• React Native: 0.55.1
• Node: 8.9.1
• Device: iPhone 7 (11.2)
• Xcode: 9.2.0
• macOS: 10.12.6

There is a more comprehensive list of the circleci environment in which Detox is run here https://circle-macos-docs.s3.amazonaws.com/image-manifest/build-298/index.html

Device and verbose Detox logs

detox-hang-verbose-log.txt

[diegolmello]

Yeah, it's happening here too.

[Angry-Potato]

I appreciate this is a low priority issue as it impacts 2 people that we know of, so to hopefully get some feedback I cast the net wider on SO https://stackoverflow.com/questions/50248654/are-circleci-macos-boxes-too-low-spec-to-run-detox

[bmakuh]

yes, we saw the same

[Angry-Potato]

@diegolmello @bmakuh have you guys managed to work around this?

[diegolmello]

@Angry-Potato @bmakuh I've updated to 7.3.5 and it works... sometimes. It's still broken.

[bmakuh]

@Angry-Potato unfortunately no. We were on the two week macOS trial to try to get it running, and we were never able to before the trial ran out.

[Angry-Potato]

@diegolmello @bmakuh I dropped to an early node 8 version, and detox now runs fine.