[CI] Snapshot Test reference images differ on Circle CI

[hramos]

We're tracking a known issue where the snapshot test reference images differ slightly when generated on Circle CI as compared to a regular macOS install when Xcode 11 is used. We suspect this might be related to the use of the GPU by the simulator, a feature that is new to Xcode 11 (see similar issue at uber/ios-snapshot-test-case#109). This is based off the assumption that the way Circle CI handles macOS jobs might not provide access to a GPU.

Snapshot tests will be disabled on Circle CI until this issue is resolved.

Reference

The actual differences between the images are imperceptible to the naked eye, and may be attributed to slight differences in how the views are rendered on and off GPU.

This is the diff for testSwitchExample:

These are the two images, side by side:

[pigeon56]

I just updated to Catalina / Xcode 11.4.1 about a week ago, and my tests (iOS Snapshot tests run via Circle CI) started breaking. The issue that you describe here seems to be what I'm encountering. Do you have any updates on this?

Thanks in advance.

[fabOnReact]

@ChiWhiteSox56 I'm on Ubuntu 19.10 and I am following the Docker Instructions writter from Hector Ramos. 😃 Thanks a lot for the amazing instructions. Could not make it without them.

[stale]

Hey there, it looks like there has been no activity on this issue recently. Has the issue been fixed, or does it still require the community's attention? This issue may be closed if no further activity occurs. You may also label this issue as a "Discussion" or add it to the "Backlog" and I will leave it open. Thank you for your contributions.

[stale]

Closing this issue after a prolonged period of inactivity. If this issue is still present in the latest release, please feel free to create a new issue with up-to-date information.