self-ref testing

bar.js

// `lib/bar.js`

module.exports = 'bar'

bar.test.js

// `test/lib/bar.test.js`

const assert = require('assert')
const bar = require('foo/lib/bar')

assert.equal(bar, 'bar')

package.json

{
  "name": "foo",
  "exports": {
    "./": "./"
  }
}