Testing Private Helpers Without Exporting Them
Keep private utilities private and still test them with Vitest in-source testing, then verify Vite strips the tests from production builds.
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typescriptIn-Source Testing with Vitest for Private Helpers Without Exporting Them
Keep private helper functions tested without exporting them by writing Vitest suites inside the implementation file and gating them with import.meta.vitest, with careful Vite build configuration to avoid shipping test code.