@tetcoin/util/is/observable.spec.js

A collection of useful utilities for @tetcoin

"use strict";

var _ = require(".");

// Copyright 2017-2019 @polkadot/util authors & contributors
// This software may be modified and distributed under the terms
// of the Apache-2.0 license. See the LICENSE file for details.
describe('isObservable', () => {
  it('returns true on valid observables', () => {
    expect((0, _.isObservable)({
      next: () => true
    })).toEqual(true);
  });
  it('returns false on invalid objects', () => {
    expect((0, _.isObservable)('notAnObservable')).toEqual(false);
  });
  it('returns false on invalid next functions', () => {
    expect((0, _.isObservable)({
      next: true
    })).toEqual(false);
  });
});