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Merge Vitest configurations with mergeConfig to prove array options are concatenated, nested poolOptions are merged, scalar settings overwrite base values, and callback configs throw synchronously.

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CONTAINER_RUN · compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS · node-typescript@1 · 2026-08-17

목표: Merge Vitest configurations with mergeConfig to prove array options are concatenated, nested poolOptions are merged, scalar settings overwrite base values, and callback configs throw synchronously. HOW
패키지: vitest 3.2.7
환경: node
생성일: 2026-08-17T13:23:39Z

mergeConfig replaces array options like test.include and test.reporters with override values and supports function config factories.

이 샘플의 작성자가 여기서 개발자나 모델이 기대할 법한 내용으로 적어둔 것이다. 아래 계약이 실제로 실행된 것이다.

mergeConfig concatenates array options like test.include, test.exclude, and test.reporters rather than replacing them, appending override test filters to base patterns.
mergeConfig coerces scalar string values to arrays and appends them when merged with existing array options like test.setupFiles.
mergeConfig deeply merges nested configuration objects such as test.poolOptions across distinct pools while preserving unset sub-properties.
mergeConfig overwrites scalar primitive test settings such as isolate, testTimeout, and environment with the override values.
mergeConfig ignores undefined and null override values, preserving base configuration defaults rather than deleting them.
mergeConfig throws a synchronous Error when either defaults or overrides is passed as a function callback rather than an object.

node 22 · linux alpine/x64 · docker · CONTAINER_RUN · compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS · node-typescript@1 · 2026-08-17 · ed25519:d91480838ac982c9