component unit testing in Glimmer

For classic component unit tests, how would we migrate this to Glimmer? This component unit test is testing a local prop that is not exposed to the user.

const component = this.owner
  .factoryFor('component:some-component')
  .create({
    someModel: { foo: 'bar' }
  });

assert.equal(component.get('someLocalProp'), false);