CodeSampleX

Recordsnpmjest29.7.0

Which symbol ran where

Symbols × operating systems for this version. Cells drill into the package's compatibility cube.

alpine muslubuntu glibc11
expect.extend
expect.toEqual
expect.toStrictEqual
extensionsToTreatAsEsm
jest.fn
jest.replaceProperty

Showing the environments with the most evidence.

Reading a cell: The number is how many recorded observations the rate divides — one build files an observation per stage it reached, so it counts neither builds nor machines nor people. The document beside it is a different fact from a different source: whether a sample exists at that coordinate, and how our own run of it went there.

A document means there is a sample at that coordinate. Whether one EXISTS is a fact about this release and this API and does not change with OS, runtime or package manager; its COLOUR is how that sample ran in the environment you are looking at.

Environment detail

Project-level observations and symbol/contract verifications are counted separately and never combined.

These counts do not distinguish how the symbol was called: overloads, argument shapes and options are pooled together. What a particular call shape does is proven by a sample's contract, not by these numbers.

Environment Confidence Observations Verified Pass rate Peers Last seen
node 22 · JS · npm · linux musl · docker
Observations: PROJECT_LOAD 2✓ · PROJECT_TEST 2✓ — Usage: USED 2✓ — Verified: CONTRACT 15✓
MEDIUM 4 +2 15 100% 1 · 2✓ 2026-08-30
node 22 · JS · npm · linux musl · docker
Observations: PROJECT_LOAD 1✓ · PROJECT_TEST 1✓ — Usage: USED 1✓ — Verified: CONTRACT 1✓
LOW 2 +1 1 100% 1 · 1✓ 2026-08-30
node 22.23 · JS · npm · linux glibc
Observations: PROJECT_PROCESS 1✓
LOW 1 0 100% 1 2026-08-29
node 24.13 · JS · npm · windows
Observations: PROJECT_PROCESS 3✓
LOW 3 0 100% 1 2026-08-16
node 24.13 · JS · npm · windows
Observations: PROJECT_PROCESS 1✓ 1✕
LOW 2 0 50% 1 2026-08-16
node 24.13 · JS · npm · windows
Observations: PROJECT_PROCESS 5✓ · PROJECT_TEST 1✓ — Usage: USED 1✓
LOW 6 +1 0 100% 1 2026-08-18

Recent failure clusters

Symbols