@reactivex/rxjs
Version:
Reactive Extensions for modern JavaScript
149 lines • 6.39 kB
JavaScript
"use strict";
var Rx = require('../../dist/cjs/Rx');
var Observable = Rx.Observable;
/** @test {race} */
describe('Observable.race', function () {
it('should race a single observable', function () {
var e1 = cold('---a-----b-----c----|');
var e1subs = '^ !';
var expected = '---a-----b-----c----|';
var result = Observable.race(e1);
expectObservable(result).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('should race cold and cold', function () {
var e1 = cold('---a-----b-----c----|');
var e1subs = '^ !';
var e2 = cold('------x-----y-----z----|');
var e2subs = '^ !';
var expected = '---a-----b-----c----|';
var result = Observable.race(e1, e2);
expectObservable(result).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
expectSubscriptions(e2.subscriptions).toBe(e2subs);
});
it('should race hot and hot', function () {
var e1 = hot('---a-----b-----c----|');
var e1subs = '^ !';
var e2 = hot('------x-----y-----z----|');
var e2subs = '^ !';
var expected = '---a-----b-----c----|';
var result = Observable.race(e1, e2);
expectObservable(result).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
expectSubscriptions(e2.subscriptions).toBe(e2subs);
});
it('should race hot and cold', function () {
var e1 = cold('---a-----b-----c----|');
var e1subs = '^ !';
var e2 = hot('------x-----y-----z----|');
var e2subs = '^ !';
var expected = '---a-----b-----c----|';
var result = Observable.race(e1, e2);
expectObservable(result).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
expectSubscriptions(e2.subscriptions).toBe(e2subs);
});
it('should race 2nd and 1st', function () {
var e1 = cold('------x-----y-----z----|');
var e1subs = '^ !';
var e2 = cold('---a-----b-----c----|');
var e2subs = '^ !';
var expected = '---a-----b-----c----|';
var result = Observable.race(e1, e2);
expectObservable(result).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
expectSubscriptions(e2.subscriptions).toBe(e2subs);
});
it('should race emit and complete', function () {
var e1 = cold('-----|');
var e1subs = '^ !';
var e2 = hot('------x-----y-----z----|');
var e2subs = '^ !';
var expected = '-----|';
var result = Observable.race(e1, e2);
expectObservable(result).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
expectSubscriptions(e2.subscriptions).toBe(e2subs);
});
it('should allow unsubscribing early and explicitly', function () {
var e1 = cold('---a-----b-----c----|');
var e1subs = '^ !';
var e2 = hot('------x-----y-----z----|');
var e2subs = '^ !';
var expected = '---a-----b---';
var unsub = ' !';
var result = Observable.race(e1, e2);
expectObservable(result, unsub).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
expectSubscriptions(e2.subscriptions).toBe(e2subs);
});
it('should not break unsubscription chains when unsubscribed explicitly', function () {
var e1 = hot('--a--^--b--c---d-| ');
var e1subs = '^ ! ';
var e2 = hot('---e-^---f--g---h-|');
var e2subs = '^ ! ';
var expected = '---b--c--- ';
var unsub = ' ! ';
var result = Observable.race(e1.mergeMap(function (x) { return Observable.of(x); }), e2.mergeMap(function (x) { return Observable.of(x); })).mergeMap(function (x) { return Observable.of(x); });
expectObservable(result, unsub).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
expectSubscriptions(e2.subscriptions).toBe(e2subs);
});
it('should never emit when given non emitting sources', function () {
var e1 = cold('---|');
var e2 = cold('---|');
var e1subs = '^ !';
var expected = '---|';
var source = Observable.race(e1, e2);
expectObservable(source).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('should throw when error occurs mid stream', function () {
var e1 = cold('---a-----#');
var e1subs = '^ !';
var e2 = cold('------x-----y-----z----|');
var e2subs = '^ !';
var expected = '---a-----#';
var result = Observable.race(e1, e2);
expectObservable(result).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
expectSubscriptions(e2.subscriptions).toBe(e2subs);
});
it('should throw when error occurs before a winner is found', function () {
var e1 = cold('---#');
var e1subs = '^ !';
var e2 = cold('------x-----y-----z----|');
var e2subs = '^ !';
var expected = '---#';
var result = Observable.race(e1, e2);
expectObservable(result).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
expectSubscriptions(e2.subscriptions).toBe(e2subs);
});
it('handle empty', function () {
var e1 = cold('|');
var e1subs = '(^!)';
var expected = '|';
var source = Observable.race(e1);
expectObservable(source).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('handle never', function () {
var e1 = cold('-');
var e1subs = '^';
var expected = '-';
var source = Observable.race(e1);
expectObservable(source).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('handle throw', function () {
var e1 = cold('#');
var e1subs = '(^!)';
var expected = '#';
var source = Observable.race(e1);
expectObservable(source).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
});
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