RepoJournal
Shopify

Shopify

Hydrogen, Polaris, and the CLI — the dev platform behind millions of stores

Pick a date

  1. Thu 7 may
  2. Fri 8 may
  3. Sat 9 may
  4. Mon 11 may
  5. Tue 12 may
  6. Wed 13 may
  7. Thu 14 may
  8. Fri 15 may
  9. Sat 16 may
  10. Tue 19 may
  11. Thu 21 may
  12. Sat 23 may
  13. Wed 27 may
  14. Thu 28 may
  15. Fri 29 may
  16. Sat 30 may
  17. Mon 8 jun
  18. Tue 9 jun
  19. Wed 10 jun
  20. Thu 11 jun
  21. Fri 12 jun
  22. Sat 13 jun
  23. Tue 16 jun
  24. Wed 17 jun
  25. Thu 18 jun
  26. Sat 27 jun
  27. Tue 30 jun
  28. Wed 1 jul
  29. Thu 2 jul
  30. Today 3 jul

The Wire · Showcase

CLI TEST SUITE DITCHES FLAKY SLEEPS FOR EXPLICIT WAITS

By RepoJournal · Filed · About Shopify

Shopify's CLI test infrastructure is killing fixed delays in favor of event-driven assertions, eliminating a class of timing-dependent test failures.

The team removed hardcoded `sleep()` calls and synthetic `setTimeout` polling from file watcher and app event tests [1][2], replacing them with Vitest's `vi.waitFor` helper [3][4]. This shift matters: tests that depend on elapsed time are inherently fragile, failing unpredictably on slower CI runners or during system load spikes. The file watcher tests were particularly problematic, mixing fixed waits with manual callback delays that made the suite slow and unreliable [3]. By switching to explicit event-driven waits, the tests now run faster and fail only when the code actually breaks, not when timing aligns wrong [4]. This is maintenance work that pays dividends immediately: faster feedback loops for developers and fewer ghost failures on deploy pipelines .

Action items

References

  1. [1] Merge pull request #7846 from Shopify/06-17-remove_fixed_sleeps_from_file_watcher_tests Shopify/cli
  2. [2] Remove fixed sleeps from file watcher tests Shopify/cli
  3. [3] Remove fixed sleeps from file watcher tests ↗ Shopify/cli
  4. [4] Use vi.waitFor in app event watcher test ↗ Shopify/cli

FAQ

What changed in Shopify on June 18, 2026?
Shopify's CLI test infrastructure is killing fixed delays in favor of event-driven assertions, eliminating a class of timing-dependent test failures.
What should Shopify teams do about it?
Review your own test suites for fixed sleeps and replace with vi.waitFor where applicable • Monitor next CLI test run for performance improvement and flake reduction
Which Shopify repositories shipped on June 18, 2026?
Shopify/cli

Related across the cluster

For your repos

The showcase is a teaser.
Your wire is the product.

Same engine. Different stack. Below: what changes when the wire is yours.

Showcase wire

  • •14 famous open source orgs
  • •One wire per day
  • •Public, generic
  • •Read on the web, when you remember

Your wire

  • →Up to 1,500 of your repos - orgs, deps, vendors
  • →Morning and evening briefs
  • →Action items routed to your team
  • →Slack delivery, email, breaking-news CVE alerts

Want a hands-on demo first? Ask a current user for an invite link.