jest Error "test.each is not a function"

[eins78]

Is this a bug report?

(write your answer here)

Yes.

Did you try recovering your dependencies?

Yes, tried it with a newly created project.

Which terms did you search for in User Guide?

jest, .each

Environment

Environment:
  OS:  macOS High Sierra 10.13.6
  Node:  8.9.2
  Yarn:  1.7.0
  npm:  6.2.0
  Watchman:  4.9.0
  Xcode:  Xcode 9.4.1 Build version 9F2000
  Android Studio:  Not Found

Packages: (wanted => installed)
  react: ^16.4.2 => 16.4.2
  react-dom: ^16.4.2 => 16.4.2
  react-scripts: 1.1.4 => 1.1.4

Steps to Reproduce

npx create-react-app jest-each-bug
cd jest-each-bug/
echo 'test.each([1])('t', a => expect(a).toBe(1))' > src/some.test.js
CI=true npm run test

Expected Behavior

Test should run.

Actual Behavior

💣 TypeError: test.each is not a function

console output

> [email protected] test /private/tmp/jest-each-bug
> react-scripts test --env=jsdom

 PASS  src/App.test.js
 FAIL  src/some.test.js
  ● Test suite failed to run

    TypeError: test.each is not a function

      at Object.<anonymous> (src/some.test.js:1:108)
          at <anonymous>

Test Suites: 1 failed, 1 passed, 2 total
Tests:       1 passed, 1 total
Snapshots:   0 total
Time:        1.129s
Ran all test suites.

Reproducible Demo

See "Steps to Reproduce" above, creates demo project.

[skoging]

This was added in Jest 23.
create-react-app is on version 20.0.4 in master and 22.4.3 in next.

jest-each is still available as a separate package, but the syntax is a bit different:

npx create-react-app jest-each-bug
cd jest-each-bug/
yarn add jest-each
echo "import each from 'jest-each'; each([1]).test('t', a => expect(a).toBe(1))" > src/some.test.js
CI=true npm run test

 PASS  src/App.test.js
 PASS  src/some.test.js

Test Suites: 2 passed, 2 total
Tests:       2 passed, 2 total
Snapshots:   0 total
Time:        3.776s
Ran all test suites.

[Timer]

Jest 23 will be out with v2.