require() not working after upgrade

[nisuxyz]

Current behavior:

On 3.8.3, I have tests that require() either other specs directly or functions that return a spec, and it works great. After updating to 4.0, all my specs with require() calls break with the following error:

Reverting to 3.8.3 restores desired behavior.

Desired behavior:

Specs can require() other specs or functions

Test code to reproduce

Create a file that exports a function that returns a describe():

export default (config) => {
  return describe(config.title, () => {
    // does stuff here
  }
}

require() the function in another spec:

describe('a different spec', () => {
  require('path/to/first/spec.spec.js')({ config: 'object', that: 'is', passed: 'in' });
});

Versions

Cypress 4.0.1, chrome and firefox, Manjaro Linux 18.1.5 (5.5.0-1 kernel)

[jennifer-shehane]

This is a regression in 4.0.0. This is likely due to the @cypress/browserify-preprocessor dependency update from 1.1.2 to 2.1.1

My working example:

spec.js

describe('a different spec', () => {
  const num = require('./spec2.js')(4)

  it('foo', () => {
    expect(num).to.eq(64)
  })
})

spec2.js

export default function cube(x) {
  return x * x * x
}

3.8.3

4.0.0

[cypress-bot]

The code for this is done in cypress-io/cypress#6419, but has yet to be released.
We'll update this issue and reference the changelog when it's released.

[cypress-bot]

Released in 4.0.2.

This comment thread has been locked. If you are still experiencing this issue after upgrading to
Cypress v4.0.2, please open a new issue.