[0.6.0] req.headers.origin undefined in CLI mode

[hoIIer]

version 0.6.0
ember-auto-import: 2.4.0
ember 3.28.0

When I run my fastboot test in browser mode it passes:

When I run it in cli mode it fails with:

Error: Ember CLI FastBoot Testing: We were unable to render /p/abc123. Is your test suite blocking or intercepting HTTP requests

Noticing it's missing the x-fastboot-testing header

{
  connection: 'keep-alive',
  'content-length': '22',
  'content-type': 'text/html; charset=utf-8',
  date: 'Tue, 08 Feb 2022 01:10:53 GMT',
  etag: '\\16-Iz+hV1iVsvp6pCFWupm+jyvhDK8\\',
  'keep-alive': 'timeout=5',
  vary: 'Accept-Encoding',
  'x-powered-by': 'Express'
}

Any suggestions on what could cause this?

edit 1

Was able to determine that it fails due to missing request origin header in cli mode at this line:
https://github.com/embermap/ember-cli-fastboot-testing/blob/v0.6.0/lib/helpers.js#L42

We need to use a fallback value for CLI mode where req.headers.origin is undefined:

ember-cli-fastboot-testing/lib/helpers.js

Line 42 in 7d4c3ed

const parsed = new URL(urlToVisit, req.headers.origin);

e.g.

 const origin = req.headers.origin || 'http://localhost';
 const parsed = new URL(urlToVisit, origin);