Sample
Differentiate TypedArray instances from plain index-keyed objects in Bun.deepEquals on Bun 1.3.14
sha256:dcbbab2d29bd9e7dbeaa51796cae177029dc1d819a7b2d21ede7500c5b618a06
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
- Differentiate TypedArray instances from plain index-keyed objects in Bun.deepEquals on Bun 1.3.14 HOW
- Packages
-
bun 1.3.14
- Environment
- node
- Created
- 2026-08-17T03:51:22Z
Commonly assumed
Bun.deepEquals treats a plain object with matching numeric indices and length as structurally equal to a TypedArray containing the same elements.
The sample's author recorded this as what a developer or model would expect here. The contract below is what actually ran.
Contract
- Bun.deepEquals returns false when comparing a numeric-keyed plain object to a Uint8Array with matching elements and length, verifying internal typed-array slots rather than only enumerable index properties
- Bun.deepEquals returns false when comparing a Date instance to an empty object sharing Date.prototype
- Bun.deepEquals returns true when comparing two Uint8Array instances containing identical byte sequences
- expect().toEqual in bun:test throws an assertion error when comparing a numeric-keyed plain object against a TypedArray
Files
- NOTES.md
- csx.json
- package-lock.json
- package.json
- test/bun-binary.mjs
- 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