testStreamProfileYieldsCachedProfileByDefault flakiness in CI

[danieldaquino]

Version: v1.17 (1331)

Steps

1. Run tests repeatedly in Xcode Cloud

Expected results

ProfilesManagerTests should pass every single time.

Actual results

Sometimes tests fail with

Test Failure
ProfilesManagerTests.testStreamProfileYieldsCachedProfileByDefault()
XCTAssertNotNil failed - Profile should be cached in NDB
ProfilesManagerTests.swift:46
Test Failure
ProfilesManagerTests.testStreamProfileYieldsCachedProfileByDefault()
XCTAssertEqual failed: ("nil") is not equal to ("Optional("testuser")")
ProfilesManagerTests.swift:47

Analysis

I attempted to reproduce this issue on a local machine, by running the relevant tests 100 times, and those have passed all 100 times, indicating that there is flakiness on the test (rather than an issue with the feature itself). Either:

• Something about the CI environment causes the issue
• Some interaction between two concurrently running tests is causing the failure (i.e. an issue with test isolation)

[linear]

IOS-2408