Installing jest-enzyme breaks npm test suite.

[csalvato]

Can you reproduce the problem with latest npm?

Yup!

Description

Installing jest-enzyme using the instructions outlined here causes the test suite to break.

Test suite failed to run

    TypeError: expect.addSnapshotSerializer is not a function

      at Object.<anonymous> (node_modules/jest-enzyme/lib/index.js:23:8)
      at Object.<anonymous> (src/setupTests.js:1:156)

Expected behavior

Using jest-enzyme with src/setupTests.js as outlined in the docs should work.

Actual behavior

Using jest-enzyme with src/setupTests.js as outlined in the docs causes the test suite to fail.

Environment

npm ls react-scripts

[email protected]

node -v:

v6.10.0

npm -v

4.4.4

Operating system

OS X El Capitan 10.11.6

Browser and version:

N/A - this is in the command line

Reproducible Demo

https://github.com/csalvato/cra-jest-enzyme

[gaearon]

See here: enzymejs/enzyme-matchers@f1f42ff.
Apparently their newest version depends on some Jest feature that hasn’t made it to our release yet.

Please use [email protected] in the meantime.

[gaearon]

Documented in 798572a.

[csalvato]

Terrific! Thank you!