Пример

Jest requires setupFilesAfterEnv rather than setupFiles to register test framework lifecycle hooks and custom matchers because setupFiles runs before the test framework is installed

sha256:54d7455a1f1a8164920b91e0674efab285e8709ffd5ea541dc3da0dd5f541e20

PUBLISHED L3_CONTRACT_PASS MIT-0

Кейс

Цель: Jest requires setupFilesAfterEnv rather than setupFiles to register test framework lifecycle hooks and custom matchers because setupFiles runs before the test framework is installed HOW
Пакеты: jest 29.7.0
Окружение: node
Создан: 2026-08-17T01:53:57Z

A test setup file configured under setupFiles has access to test framework globals like beforeEach, afterEach, and expect.extend.

Автор образца записал здесь то, чего ожидал бы разработчик или модель. Контракт ниже — это то, что действительно выполнялось.

assert running Jest with test framework hooks in setupFiles fails with ReferenceError: beforeEach is not defined because the framework environment is not yet initialized
assert setupFiles executes in the isolated test environment before the test framework and can configure environment globals
assert setupFilesAfterEnv executes after test framework initialization, allowing beforeEach hooks and expect.extend matchers to run across test suites
assert jest-config normalize correctly resolves <rootDir> tokens for both setupFiles and setupFilesAfterEnv into absolute paths

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