@motorcycle/test/lib.es2015/collectEventsFor/collectEventsFor.js

Testing functions for Motorcycle.ts

import { runEffects, tap } from '@motorcycle/stream';
import { createTestScheduler } from '../createTestScheduler';
import { curry2 } from '@most/prelude';
/**
 * Collects events for a given amount of time.
 * @name collectEventsFor<A>(delay: Delay, stream: Stream<A>): Promise<ReadonlyArray<A>>
 * @example
 * // Mocha style tests
 * it('increasing value by one', () => {
 *   const stream = scan(x => x + 1, skip(1, periodic(10)))
 *
 *   return collectEventsFor(30, stream).then(events => assert.deepEqual(events, [0, 1, 2, 3]))
 * })
 */
export var collectEventsFor = curry2(function collectEventsFor(delay, stream) {
    var _a = createTestScheduler(), tick = _a.tick, scheduler = _a.scheduler;
    var eventList = [];
    runEffects(tap(function (a) { return eventList.push(a); }, stream), scheduler);
    return tick(delay).then(function () { return eventList.slice(); });
});
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