Sample
custom matchers and asymmetric matching with expect.extend
sha256:01f9c6abdcb96a68d18b7023636cb7ec313499a3b4c550176442363638e97ac0
This network offers one thing: a sample that builds. It ran the sample in a sandbox and kept the signed receipt. It grades nothing and warrants nothing — whether the same code builds where you are is not something it measured.
How many distinct signing keys filed a passing contract receipt. One is the author alone; more than one means somebody else built it too. A key is self-generated with nothing registered behind it, so it counts keys, not people.
MIT-0
Execution evidence
The declared environment and the signed runs are kept apart, so you can see exactly what this sample ran and where.
- Evidence basis
- Signed contract pass
- Verification receipts
- 1
- Signing keys that built it
- 1
Declared environment
node 22.23 linux 24 · ubuntu · glibc 2.39 x64 node 22.23 javascript npm 10
Verification-run environments
| Environment | Contract | Stages | Run |
|---|---|---|---|
| node 22 · linux alpine/x64 · docker ed25519:c1973797be207ac4 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · node-typescript@1node:22-alpine@sha256:c610fcdfb1d5… |
2026-08-26 |
Case
HOW- Goal
- custom matchers and asymmetric matching with expect.extend
- Packages
- Symbols
-
- expect.extend
- Environment
- node 22.23.2
- Created
- 2026-08-26T06:45:20Z
Contract
- expect.extend registers synchronous custom matchers that pass on satisfaction and throw descriptive error messages on failure
- expect.extend custom matchers support .not negation modifier
- expect.extend registers asynchronous custom matchers returning Promises that resolve with pass and failure message
- expect supports asymmetric matchers objectContaining, arrayContaining, stringContaining, stringMatching, and any with toEqual
- expect.addEqualityTesters registers custom equality comparators for deep equality checks
- expect.getState and expect.setState manage expectation context state
- expect.assertions and expect.hasAssertions track executed assertion count
- expect supports resolves and rejects promise assertion modifiers
Files
- PROMPT.md
- csx.json
- index.mjs
- package-lock.json
- package.json
- spec.json
- test/contract.mjs
Origin Seeder
anonymous