@reactivex/rxjs
Version:
Reactive Extensions for modern JavaScript
81 lines • 3.28 kB
JavaScript
;
var chai_1 = require('chai');
var Rx = require('../../dist/cjs/Rx');
var Observable = Rx.Observable;
// function shortcuts
var throwError = function () { throw new Error(); };
/** @test {mapTo} */
describe('Observable.prototype.mapTo', function () {
asDiagram('mapTo(\'a\')')('should map multiple values', function () {
var a = cold('--1--2--3--|');
var asubs = '^ !';
var expected = '--a--a--a--|';
expectObservable(a.mapTo('a')).toBe(expected);
expectSubscriptions(a.subscriptions).toBe(asubs);
});
it('should map one value', function () {
var a = cold('--7--|');
var asubs = '^ !';
var expected = '--y--|';
expectObservable(a.mapTo('y')).toBe(expected);
expectSubscriptions(a.subscriptions).toBe(asubs);
});
it('should allow unsubscribing explicitly and early', function () {
var a = cold('--1--2--3--|');
var unsub = ' ! ';
var asubs = '^ ! ';
var expected = '--x--x- ';
expectObservable(a.mapTo('x'), unsub).toBe(expected);
expectSubscriptions(a.subscriptions).toBe(asubs);
});
it('should propagate errors from observable that emits only errors', function () {
var a = cold('--#', null, 'too bad');
var asubs = '^ !';
var expected = '--#';
expectObservable(a.mapTo(1)).toBe(expected, null, 'too bad');
expectSubscriptions(a.subscriptions).toBe(asubs);
});
it('should propagate errors from observable that emit values', function () {
var a = cold('--1--2--#', undefined, 'too bad');
var asubs = '^ !';
var expected = '--x--x--#';
expectObservable(a.mapTo('x')).toBe(expected, undefined, 'too bad');
expectSubscriptions(a.subscriptions).toBe(asubs);
});
it('should propagate errors from subscribe', function () {
var r = function () {
Observable.of(1)
.mapTo(-1)
.subscribe(throwError);
};
chai_1.expect(r).to.throw();
});
it('should not map an empty observable', function () {
var a = cold('|');
var asubs = '(^!)';
var expected = '|';
expectObservable(a.mapTo(-1)).toBe(expected);
expectSubscriptions(a.subscriptions).toBe(asubs);
});
it('should map twice', function () {
var a = hot('-0----1-^-2---3--4-5--6--7-8-|');
var asubs = '^ !';
var expected = '--h---h--h-h--h--h-h-|';
var r = a.mapTo(-1).mapTo('h');
expectObservable(r).toBe(expected);
expectSubscriptions(a.subscriptions).toBe(asubs);
});
it('should not break unsubscription chain when unsubscribed explicitly', function () {
var a = cold('--1--2--3--|');
var unsub = ' ! ';
var asubs = '^ ! ';
var expected = '--x--x- ';
var r = a
.mergeMap(function (x) { return Observable.of(x); })
.mapTo('x')
.mergeMap(function (x) { return Observable.of(x); });
expectObservable(r, unsub).toBe(expected);
expectSubscriptions(a.subscriptions).toBe(asubs);
});
});
//# sourceMappingURL=mapTo-spec.js.map