refactor: Separate concerns in mock provider sources logic, handle callbacks using `t.Cleanup`#38446

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SarahFrench merged 4 commits intomainfrom

sarah/refactor-mock-provider-sources

Apr 27, 2026

Commits on Apr 27, 2026

refactor: Split temp file creation logic out of FakeInstallablePackageMeta & FakePackageMetaViaHTTP. Handle cleanup internally.

SarahFrench
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refactor: Use 'Must' helpers in `newMockProviderSourceUsingTestHttpServer`

SarahFrench
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fix: Don't return nil close function in `newMockProviderSource`
SarahFrench
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refactor: Update tests using `newMockProviderSource` to not handle 'close' callback
SarahFrench
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