source.map is not a function

[Nick Meldrum]

Was trying your jest example line for line from the readme:

import { marbles } from 'rxjs-marbles'

test('does something', marbles(m => {
  const values = { a: 1, b: 2, c: 3, d: 4 }

  const source = m.hot('--^-a-b-c-|', values)
  const subs = '^-------!'
  const expected = m.cold('--b-c-d-|', values)

  const destination = source.map(value => value + 1)
  m.expect(destination).toBeObservable(expected)
  m.expect(source).toHaveSubscriptions(subs)
}))

and I receive the error:

    TypeError: source.map is not a function

       8 |   const expected = m.cold('--b-c-d-|', values)
       9 |
    > 10 |   const destination = source.map(value => value + 1)
      11 |   m.expect(destination).toBeObservable(expected)
      12 |   m.expect(source).toHaveSubscriptions(subs)
      13 | }))

      at scan.test.js:10:28
      at Object.<anonymous> (node_modules/rxjs-marbles/bundles/rxjs-marbles.umd.js:2242:14)

looks to me like we expect the hot() function to return an observable but instead it's returning a SubscriptionLoggable type? I'm pretty new to rxjs so don't really understand!

any idea?

(My dependency versions:)

    "jest": "^22.0.4",
    "rxjs": "^5.5.6",
    "rxjs-marbles": "^2.3.0"

[Nick Meldrum]

I am such an idiot - i was just missing the step 1 of using rxjs version 5!

added import 'rxjs/add/operator/map'
to top of file and it all worked - sorry!