Sample
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.
sha256:1dfef295ccfd24dd2807caebd70c6cc20478ae8ce7a866569caa0ce1609dc27d
PUBLISHED
L3_CONTRACT_PASS
MIT-0
Execution evidence
Declared environment and signed verification runs are separated so you can see exactly what this sample proves.
Evidence basisSigned contract pass
Verification receipts1
Verification levelL3_CONTRACT_PASS
Declared environment
- Execution context
- node
- Operating system
- linux
- Architecture
- x64
- Runtime
- node
- Language
- node
- Package manager
- npm
Verification-run environments
- Execution context
- node 22
- Operating system
- linux alpine · musl
- Architecture
- x64
- Runtime
- node 22
- Language
- javascript
- Package manager
- npm
- Execution
- container · docker
CONTAINER_RUN · compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS · node-typescript@1 · 2026-08-17
Case
- Goal
- 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
- Packages
-
vitest 3.2.7
- Environment
- node
- Created
- 2026-08-17T13:23:39Z
Commonly assumed
mergeConfig replaces array options like test.include and test.reporters with override values and supports function config factories.
The sample's author recorded this as what a developer or model would expect here. The contract below is what actually ran.
Contract
- 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.
Files
- NOTES.md
- csx.json
- package-lock.json
- package.json
- test/contract.mjs
Download the source artifact (tar.gz)
Origin Seeder
csx-seed
Verification receipts
- node 22 · linux alpine/x64 · docker · CONTAINER_RUN · compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS · node-typescript@1 · 2026-08-17 · ed25519:d91480838ac982c9