@reactivex/rxjs
Version:
Reactive Extensions for modern JavaScript
90 lines • 4.61 kB
JavaScript
;
var Rx = require('../../dist/cjs/Rx');
var Observable = Rx.Observable;
/** @test {sampleTime} */
describe('Observable.prototype.sampleTime', function () {
asDiagram('sampleTime(70)')('should get samples on a delay', function () {
var e1 = hot('a---b-c---------d--e---f-g-h--|');
var e1subs = '^ !';
var expected = '-------c-------------e------h-|';
// timer -------!------!------!------!--
expectObservable(e1.sampleTime(70, rxTestScheduler)).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('should sample nothing if new value has not arrived', function () {
var e1 = hot('----a-^--b----c--------------f----|');
var e1subs = '^ !';
var expected = '-----------c----------------|';
// timer -----------!----------!---------
expectObservable(e1.sampleTime(110, rxTestScheduler)).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('should sample if new value has arrived, even if it is the same value', function () {
var e1 = hot('----a-^--b----c----------c---f----|');
var e1subs = '^ !';
var expected = '-----------c----------c-----|';
// timer -----------!----------!---------
expectObservable(e1.sampleTime(110, rxTestScheduler)).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('should sample nothing if source has not nexted by time of sample', function () {
var e1 = hot('----a-^-------------b-------------|');
var e1subs = '^ !';
var expected = '----------------------b-----|';
// timer -----------!----------!---------
expectObservable(e1.sampleTime(110, rxTestScheduler)).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('should raise error if source raises error', function () {
var e1 = hot('----a-^--b----c----d----#');
var e1subs = '^ !';
var expected = '-----------c------#';
// timer -----------!----------!---------
expectObservable(e1.sampleTime(110, rxTestScheduler)).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('should allow unsubscribing explicitly and early', function () {
var e1 = hot('----a-^--b----c----d----e----f----|');
var unsub = ' ! ';
var e1subs = '^ ! ';
var expected = '-----------c----- ';
// timer -----------!----------!---------
expectObservable(e1.sampleTime(110, rxTestScheduler), unsub).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('should not break unsubscription chains when result is unsubscribed explicitly', function () {
var e1 = hot('----a-^--b----c----d----e----f----|');
var e1subs = '^ ! ';
// timer -----------!----------!---------
var expected = '-----------c----- ';
var unsub = ' ! ';
var result = e1
.mergeMap(function (x) { return Observable.of(x); })
.sampleTime(110, rxTestScheduler)
.mergeMap(function (x) { return Observable.of(x); });
expectObservable(result, unsub).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('should completes if source does not emits', function () {
var e1 = cold('|');
var e1subs = '(^!)';
var expected = '|';
expectObservable(e1.sampleTime(60, rxTestScheduler)).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('should raise error if source throws immediately', function () {
var e1 = cold('#');
var e1subs = '(^!)';
var expected = '#';
expectObservable(e1.sampleTime(60, rxTestScheduler)).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('should not completes if source does not complete', function () {
var e1 = cold('-');
var e1subs = '^';
var expected = '-';
expectObservable(e1.sampleTime(60, rxTestScheduler)).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
});
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