Detox tests hang and reloads app several times before running tests, how to debug?

Question

I am trying to debug an issue where my app takes around 20 seconds to run a single test. The timeline looks like:

Run detox test
List item
App launches
...5 seconds later, app refreshes
...5 seconds later, app refreshes
...5 seconds later, Tests run, and pass

I tried a fresh RN app and it seemed to work without this issue.

Any advice would be greatly appreciated on how to find the issue.

Post your test code. Post verbose logs. – Léo Natan Jan 07 '20 at 00:50 — Léo Natan, Jan 07 '20 at 00:50

score 1 · Accepted Answer · answered Jan 07 '20 at 10:40

1

For anyone with this issue I discovered the problem by running Lower-level resource debugging (https://github.com/wix/Detox/blob/master/docs/Troubleshooting.Synchronization.md#lower-level-idling-resources-debug-ios-only)

This alerted me to the fact there was a continuous animation occurring, specifically a <ActivityIndicator /> on a screen that was hidden but still causing detox to hang. Removing the <ActivityIndicator /> fixed the issue with the delay.

answered Jan 07 '20 at 10:40

Alex Fox

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Also check the mocking docs to see how to remove the indicator only for testing. – Léo Natan Jan 07 '20 at 16:15
@LeoNatan do you mean the React Native docs? I only see an option `hidesWhenStopped`. Is that what you mean? – Alex Fox Jan 07 '20 at 17:11

Detox tests hang and reloads app several times before running tests, how to debug?

1 Answers1