combineLatest wrong documentation or implementation

[basvermeulen]

Documentation Related To Component:

combineLatest

Please check those that apply

• typo
• documentation doesn't exist
• documentation needs clarification
• error(s) in example
• needs example

Description Of The Issue

It seems to me that the sentence "On the other hand, if some Observable does not emit a value but completes, resulting Observable will complete at the same moment without emitting anything, since it will be now impossible to include value from completed Observable in resulting array." in the 3rd paragraph is either incorrect or the expected behaviour of combineLatest is implemented incorrect.

If we have a look at :

  it('should work with never and empty', () => {
    const e1 = cold( '-');
    const e1subs =   '^';
    const e2 = cold( '|');
    const e2subs =   '(^!)';
    const expected = '-';

    const result = combineLatest(e1, e2, (x, y) => x + y);

    expectObservable(result).toBe(expected);
    expectSubscriptions(e1.subscriptions).toBe(e1subs);
    expectSubscriptions(e2.subscriptions).toBe(e2subs);
  });

To me at least it seems like const expected = '-'; should be const expected = '|'; since observable 'e2' completes immediately.