docs: prohibit InternalsVisibleTo in .NET test guidance#804
Merged
SteveSandersonMS merged 2 commits intomainfrom Mar 12, 2026
Merged
docs: prohibit InternalsVisibleTo in .NET test guidance#804SteveSandersonMS merged 2 commits intomainfrom
SteveSandersonMS merged 2 commits intomainfrom
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Co-authored-by: stephentoub <2642209+stephentoub@users.noreply.github.com>
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stephentoub
March 12, 2026 16:03
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Pull request overview
Updates the repository’s Copilot/agent guidance to prevent .NET tests from accessing internals via InternalsVisibleTo, reinforcing the repo’s intent that tests validate public API surface only.
Changes:
- Add an explicit .NET testing note prohibiting
InternalsVisibleToin any project file.
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SteveSandersonMS
approved these changes
Mar 12, 2026
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Copilot agents were occasionally adding
InternalsVisibleToto .NET project files when writing tests. This is undesirable — tests should only exercise public APIs.Change
.github/copilot-instructions.mdunder the .NET developer workflow entry, stating thatInternalsVisibleTomust never be added to any project file when writing tests.