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wire 2026-08-29
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Jest 30.5 and React test upgrades ship

By RepoJournal · Filed · About Meta

eps1lon Christoph Purrer SimenB Jakub Piasecki ahnpnl
5 people shipped this
eps1lon @eps1lon 1 cited Christoph Purrer @christophpurrer 1 cited SimenB @SimenB 1 cited Jakub Piasecki @j-piasecki ahnpnl @ahnpnl

Jest 30.5.0 ships with deep changes to jest-runtime, jest-resolve, and jest-haste-map, and React's test suite moves to Jest 30.4 with a jsdom bump.

Jest 30.5.0 is a big release touching `jest-runtime`, `jest-resolve`, and `jest-haste-map`, and the maintainer warns regressions are possible, so verify your suite after upgrading [1]. React's test suite also bumps to Jest 30.4, and the `resolutions` pin holding jsdom at 22.1.0 is removed, so the test environment now runs the jsdom version `jest-environment-jsdom` declares (26.1.0) [2]. This is a breaking change for any test using the deleted matcher aliases; React's suite now uses `toHaveBeenCalled*` instead of `toBeCalled*` and `toThrow` instead of `toThrowError`, so update your matchers accordingly [2]. React Native removes the unimplemented `sendIntent` method from `RCTLinkingManager`; since `Linking.sendIntent()` already rejected with 'Unsupported' on non-Android platforms, the native method was unreachable and only logged 'Not implemented' [3]. React Native also defers the pull model's synchronous mount batch until the root view is attached, fixing two crashes that occurred when a `ViewState` had a null `view` field [4]. The maintainer of Jest dedicated the 30.5.0 release to the memory of King Harald V of Norway [1].

Topics: JavaScript AI / ML Full archive →

Quick answers

What shipped in Meta on August 29, 2026?
Jest 30.5.0 ships with deep changes to jest-runtime, jest-resolve, and jest-haste-map, and React's test suite moves to Jest 30.4 with a jsdom bump. In total, 13 commits, 3 pull requests, and 1 releases landed.
Who contributed to Meta on August 29, 2026?
5 developers shipped this update, including eps1lon, Christoph Purrer, Jakub Piasecki, SimenB, and ahnpnl.
What were the notable Meta updates?
v30.5.0, [test] Bump Jest to 30.4, and Remove unimplemented sendIntent from RCTLinkingManager (#58154).

$ log Meta --recent

React Native patches critical shell-quote RCE 10 shipped React Native kills two feature flags as Jest scrubs a supply-chain advisory 20 shipped React Native cuts FileIoHandler security risk 25 shipped React Compiler slashes codegen time by 70% 37 shipped

$ log --all # elsewhere on the wire

AI Agents Langchain ships MCP adapter, Cline fixes telemetry and CVEs Local LLMs OpenVINO backend lands Qwen3.5 on NPU, Whisper.cpp support

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Rails Django Laravel Node.js Go Vercel Vue.js Kubernetes HashiCorp Arch Linux Linux Anthropic

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