@reactivex/rxjs
Version:
Reactive Extensions for modern JavaScript
73 lines • 3.27 kB
JavaScript
;
var Rx = require('../../dist/cjs/Rx');
var Observable = Rx.Observable;
/** @test {timer} */
describe('Observable.timer', function () {
asDiagram('timer(3000, 1000)')('should create an observable emitting periodically', function () {
var e1 = Observable.timer(60, 20, rxTestScheduler)
.take(4) // make it actually finite, so it can be rendered
.concat(Observable.never()); // but pretend it's infinite by not completing
var expected = '------a-b-c-d-';
var values = {
a: 0,
b: 1,
c: 2,
d: 3,
};
expectObservable(e1).toBe(expected, values);
});
it('should schedule a value of 0 then complete', function () {
var dueTime = time('-----|');
var expected = '-----(x|)';
var source = Observable.timer(dueTime, undefined, rxTestScheduler);
expectObservable(source).toBe(expected, { x: 0 });
});
it('should emit a single value immediately', function () {
var dueTime = time('|');
var expected = '(x|)';
var source = Observable.timer(dueTime, rxTestScheduler);
expectObservable(source).toBe(expected, { x: 0 });
});
it('should start after delay and periodically emit values', function () {
var dueTime = time('----|');
var period = time('--|');
var expected = '----a-b-c-d-(e|)';
var source = Observable.timer(dueTime, period, rxTestScheduler).take(5);
var values = { a: 0, b: 1, c: 2, d: 3, e: 4 };
expectObservable(source).toBe(expected, values);
});
it('should start immediately and periodically emit values', function () {
var dueTime = time('|');
var period = time('---|');
var expected = 'a--b--c--d--(e|)';
var source = Observable.timer(dueTime, period, rxTestScheduler).take(5);
var values = { a: 0, b: 1, c: 2, d: 3, e: 4 };
expectObservable(source).toBe(expected, values);
});
it('should stop emiting values when subscription is done', function () {
var dueTime = time('|');
var period = time('---|');
var expected = 'a--b--c--d--e';
var unsub = '^ !';
var source = Observable.timer(dueTime, period, rxTestScheduler);
var values = { a: 0, b: 1, c: 2, d: 3, e: 4 };
expectObservable(source, unsub).toBe(expected, values);
});
it('should schedule a value at a specified Date', function () {
var offset = time('----|');
var expected = '----(a|)';
var dueTime = new Date(rxTestScheduler.now() + offset);
var source = Observable.timer(dueTime, null, rxTestScheduler);
expectObservable(source).toBe(expected, { a: 0 });
});
it('should start after delay and periodically emit values', function () {
var offset = time('----|');
var period = time('--|');
var expected = '----a-b-c-d-(e|)';
var dueTime = new Date(rxTestScheduler.now() + offset);
var source = Observable.timer(dueTime, period, rxTestScheduler).take(5);
var values = { a: 0, b: 1, c: 2, d: 3, e: 4 };
expectObservable(source).toBe(expected, values);
});
});
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