sorbet: Bump test/support/helper files to typed: true

[issyl0]

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• Have you checked to ensure there aren't other open Pull Requests for the same change?
• Have you added an explanation of what your changes do and why you'd like us to include them? Performance claims (e.g. "this is faster") must include Hyperfine benchmarks.
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• AI was used to generate or assist with generating this PR.

• Used GPT-5.3 Codex (Medium reasoning) to add some of the types here. It was not actually particularly helpful and needed a lot of human reviewing and tweaking for less reliance on T.untyped and T.unsafe (particularly Library/Homebrew/test/support/helper/subcommand_spec.rb).

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• Add T.binds for RSpec example groups and matcher test helpers.
• For the undefined predicate method raising NoMethodError, trick Sorbet into not flagging it as an error by using public_send instead of direct method call - because, correctly, the method does not exist but the test is already verifying that.

[MikeMcQuaid]

Thanks, looks good when 🟢!

[issyl0]

TIL that brew lgtm runs brew tests --changed which despite editing test helpers doesn't in fact run all the tests that those test helpers are used in... adds to list of things to fix.

[github-code-quality]

Code Coverage Overview

Languages: Ruby

Ruby / code-coverage/simplecov

The overall coverage in the sorbet-test-helpers branch remains at 78%, unchanged from the main branch.

Show a code coverage summary of the most impacted files.

File	main 23e5f86	sorbet-test-helpers 0b1f3c4	+/-
services/system/systemctl.rb	93%	87%	-6%
download_queue.rb	74%	73%	-1%
dependency.rb	91%	90%	-1%
services/cli.rb	61%	63%	+2%
services/system.rb	81%	85%	+4%

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_{Updated May 30, 2026 14:48 UTC
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