@reactivex/rxjs/spec-js/operators/mergeAll-spec.js

Reactive Extensions for modern JavaScript

"use strict";
var chai_1 = require('chai');
var Rx = require('../../dist/cjs/Rx');
var Observable = Rx.Observable;
/** @test {mergeAll} */
describe('Observable.prototype.mergeAll', function () {
    asDiagram('mergeAll')('should merge a hot observable of cold observables', function () {
        var x = cold('--a---b--c---d--|      ');
        var y = cold('----e---f--g---|');
        var e1 = hot('--x------y-------|       ', { x: x, y: y });
        var expected = '----a---b--c-e-d-f--g---|';
        expectObservable(e1.mergeAll()).toBe(expected);
    });
    it('should merge all observables in an observable', function () {
        var e1 = Observable.from([
            Observable.of('a'),
            Observable.of('b'),
            Observable.of('c')
        ]);
        var expected = '(abc|)';
        expectObservable(e1.mergeAll()).toBe(expected);
    });
    it('should throw if any child observable throws', function () {
        var e1 = Observable.from([
            Observable.of('a'),
            Observable.throw('error'),
            Observable.of('c')
        ]);
        var expected = '(a#)';
        expectObservable(e1.mergeAll()).toBe(expected);
    });
    it('should handle merging a hot observable of observables', function () {
        var x = cold('a---b---c---|   ');
        var xsubs = '  ^           !   ';
        var y = cold('d---e---f---|');
        var ysubs = '     ^           !';
        var e1 = hot('--x--y--|         ', { x: x, y: y });
        var e1subs = '^                !';
        var expected = '--a--db--ec--f---|';
        expectObservable(e1.mergeAll()).toBe(expected);
        expectSubscriptions(x.subscriptions).toBe(xsubs);
        expectSubscriptions(y.subscriptions).toBe(ysubs);
        expectSubscriptions(e1.subscriptions).toBe(e1subs);
    });
    it('should merge one cold Observable at a time with parameter concurrency=1', function () {
        var x = cold('a---b---c---|            ');
        var xsubs = '  ^           !            ';
        var y = cold('d---e---f---|');
        var ysubs = '              ^           !';
        var e1 = hot('--x--y--|                  ', { x: x, y: y });
        var e1subs = '^                         !';
        var expected = '--a---b---c---d---e---f---|';
        expectObservable(e1.mergeAll(1)).toBe(expected);
        expectSubscriptions(x.subscriptions).toBe(xsubs);
        expectSubscriptions(y.subscriptions).toBe(ysubs);
        expectSubscriptions(e1.subscriptions).toBe(e1subs);
    });
    it('should merge two cold Observables at a time with parameter concurrency=2', function () {
        var x = cold('a---b---c---|        ');
        var xsubs = '  ^           !        ';
        var y = cold('d---e---f---|     ');
        var ysubs = '     ^           !     ';
        var z = cold('--g---h-|');
        var zsubs = '              ^       !';
        var e1 = hot('--x--y--z--|           ', { x: x, y: y, z: z });
        var e1subs = '^                     !';
        var expected = '--a--db--ec--f--g---h-|';
        expectObservable(e1.mergeAll(2)).toBe(expected);
        expectSubscriptions(x.subscriptions).toBe(xsubs);
        expectSubscriptions(y.subscriptions).toBe(ysubs);
        expectSubscriptions(z.subscriptions).toBe(zsubs);
        expectSubscriptions(e1.subscriptions).toBe(e1subs);
    });
    it('should merge one hot Observable at a time with parameter concurrency=1', function () {
        var x = hot('---a---b---c---|          ');
        var xsubs = '  ^            !          ';
        var y = hot('-------------d---e---f---|');
        var ysubs = '               ^         !';
        var e1 = hot('--x--y--|                 ', { x: x, y: y });
        var e1subs = '^                        !';
        var expected = '---a---b---c-----e---f---|';
        expectObservable(e1.mergeAll(1)).toBe(expected);
        expectSubscriptions(x.subscriptions).toBe(xsubs);
        expectSubscriptions(y.subscriptions).toBe(ysubs);
        expectSubscriptions(e1.subscriptions).toBe(e1subs);
    });
    it('should merge two hot Observables at a time with parameter concurrency=2', function () {
        var x = hot('i--a---b---c---|        ');
        var xsubs = '  ^            !        ';
        var y = hot('-i-i--d---e---f---|     ');
        var ysubs = '     ^            !     ';
        var z = hot('--i--i--i--i-----g---h-|');
        var zsubs = '               ^       !';
        var e1 = hot('--x--y--z--|            ', { x: x, y: y, z: z });
        var e1subs = '^                      !';
        var expected = '---a--db--ec--f--g---h-|';
        expectObservable(e1.mergeAll(2)).toBe(expected);
        expectSubscriptions(x.subscriptions).toBe(xsubs);
        expectSubscriptions(y.subscriptions).toBe(ysubs);
        expectSubscriptions(z.subscriptions).toBe(zsubs);
        expectSubscriptions(e1.subscriptions).toBe(e1subs);
    });
    it('should handle merging a hot observable of observables, outer unsubscribed early', function () {
        var x = cold('a---b---c---|   ');
        var xsubs = '  ^         !     ';
        var y = cold('d---e---f---|');
        var ysubs = '     ^      !     ';
        var e1 = hot('--x--y--|         ', { x: x, y: y });
        var e1subs = '^           !     ';
        var unsub = '            !     ';
        var expected = '--a--db--ec--     ';
        expectObservable(e1.mergeAll(), unsub).toBe(expected);
        expectSubscriptions(x.subscriptions).toBe(xsubs);
        expectSubscriptions(y.subscriptions).toBe(ysubs);
        expectSubscriptions(e1.subscriptions).toBe(e1subs);
    });
    it('should not break unsubscription chains when result is unsubscribed explicitly', function () {
        var x = cold('a---b---c---|   ');
        var xsubs = '  ^         !     ';
        var y = cold('d---e---f---|');
        var ysubs = '     ^      !     ';
        var e1 = hot('--x--y--|         ', { x: x, y: y });
        var e1subs = '^           !     ';
        var expected = '--a--db--ec--     ';
        var unsub = '            !     ';
        var result = e1
            .mergeMap(function (x) { return Observable.of(x); })
            .mergeAll()
            .mergeMap(function (x) { return Observable.of(x); });
        expectObservable(result, unsub).toBe(expected);
        expectSubscriptions(x.subscriptions).toBe(xsubs);
        expectSubscriptions(y.subscriptions).toBe(ysubs);
        expectSubscriptions(e1.subscriptions).toBe(e1subs);
    });
    it('should merge parallel emissions', function () {
        var x = cold('----a----b----c---|');
        var xsubs = '  ^                 !';
        var y = cold('-d----e----f---|');
        var ysubs = '     ^              !';
        var e1 = hot('--x--y--|            ', { x: x, y: y });
        var e1subs = '^                   !';
        var expected = '------(ad)-(be)-(cf)|';
        expectObservable(e1.mergeAll()).toBe(expected);
        expectSubscriptions(x.subscriptions).toBe(xsubs);
        expectSubscriptions(y.subscriptions).toBe(ysubs);
        expectSubscriptions(e1.subscriptions).toBe(e1subs);
    });
    it('should merge empty and empty', function () {
        var x = cold('|');
        var xsubs = '  (^!)   ';
        var y = cold('|');
        var ysubs = '     (^!)';
        var e1 = hot('--x--y--|', { x: x, y: y });
        var e1subs = '^       !';
        var expected = '--------|';
        expectObservable(e1.mergeAll()).toBe(expected);
        expectSubscriptions(x.subscriptions).toBe(xsubs);
        expectSubscriptions(y.subscriptions).toBe(ysubs);
        expectSubscriptions(e1.subscriptions).toBe(e1subs);
    });
    it('should merge three empties', function () {
        var x = cold('|');
        var xsubs = '  (^!)     ';
        var y = cold('|');
        var ysubs = '     (^!)  ';
        var z = cold('|');
        var zsubs = '       (^!)';
        var e1 = hot('--x--y-z---|', { x: x, y: y, z: z });
        var e1subs = '^          !';
        var expected = '-----------|';
        expectObservable(e1.mergeAll()).toBe(expected);
        expectSubscriptions(x.subscriptions).toBe(xsubs);
        expectSubscriptions(y.subscriptions).toBe(ysubs);
        expectSubscriptions(z.subscriptions).toBe(zsubs);
        expectSubscriptions(e1.subscriptions).toBe(e1subs);
    });
    it('should merge never and empty', function () {
        var x = cold('-');
        var xsubs = '  ^';
        var y = cold('|');
        var ysubs = '     (^!)';
        var e1 = hot('--x--y--|', { x: x, y: y });
        var e1subs = '^        ';
        var expected = '---------';
        expectObservable(e1.mergeAll()).toBe(expected);
        expectSubscriptions(x.subscriptions).toBe(xsubs);
        expectSubscriptions(y.subscriptions).toBe(ysubs);
        expectSubscriptions(e1.subscriptions).toBe(e1subs);
    });
    it('should merge never and never', function () {
        var x = cold('-');
        var xsubs = '  ^';
        var y = cold('-');
        var ysubs = '     ^';
        var e1 = hot('--x--y--|', { x: x, y: y });
        var e1subs = '^        ';
        var expected = '---------';
        expectObservable(e1.mergeAll()).toBe(expected);
        expectSubscriptions(x.subscriptions).toBe(xsubs);
        expectSubscriptions(y.subscriptions).toBe(ysubs);
        expectSubscriptions(e1.subscriptions).toBe(e1subs);
    });
    it('should merge empty and throw', function () {
        var x = cold('|');
        var xsubs = '  (^!)   ';
        var y = cold('#');
        var ysubs = '     (^!)';
        var e1 = hot('--x--y--|', { x: x, y: y });
        var e1subs = '^    !   ';
        var expected = '-----#   ';
        expectObservable(e1.mergeAll()).toBe(expected);
        expectSubscriptions(x.subscriptions).toBe(xsubs);
        expectSubscriptions(y.subscriptions).toBe(ysubs);
        expectSubscriptions(e1.subscriptions).toBe(e1subs);
    });
    it('should merge never and throw', function () {
        var x = cold('-');
        var xsubs = '  ^  !';
        var y = cold('#');
        var ysubs = '     (^!)';
        var e1 = hot('--x--y--|', { x: x, y: y });
        var e1subs = '^    !   ';
        var expected = '-----#   ';
        expectObservable(e1.mergeAll()).toBe(expected);
        expectSubscriptions(x.subscriptions).toBe(xsubs);
        expectSubscriptions(y.subscriptions).toBe(ysubs);
        expectSubscriptions(e1.subscriptions).toBe(e1subs);
    });
    it('should merge empty and eventual error', function () {
        var x = cold('|');
        var xsubs = '  (^!)';
        var y = cold('------#');
        var ysubs = '     ^     !';
        var e1 = hot('--x--y--|', { x: x, y: y });
        var e1subs = '^          !';
        var expected = '-----------#';
        expectObservable(e1.mergeAll()).toBe(expected);
        expectSubscriptions(x.subscriptions).toBe(xsubs);
        expectSubscriptions(y.subscriptions).toBe(ysubs);
        expectSubscriptions(e1.subscriptions).toBe(e1subs);
    });
    it('should merge never and eventual error', function () {
        var x = cold('-');
        var xsubs = '  ^        !';
        var y = cold('------#');
        var ysubs = '     ^     !';
        var e1 = hot('--x--y--|', { x: x, y: y });
        var e1subs = '^          !';
        var expected = '-----------#';
        expectObservable(e1.mergeAll()).toBe(expected);
        expectSubscriptions(x.subscriptions).toBe(xsubs);
        expectSubscriptions(y.subscriptions).toBe(ysubs);
        expectSubscriptions(e1.subscriptions).toBe(e1subs);
    });
    it('should take an empty source and return empty too', function () {
        var e1 = cold('|');
        var e1subs = '(^!)';
        var expected = '|';
        expectObservable(e1.mergeAll()).toBe(expected);
        expectSubscriptions(e1.subscriptions).toBe(e1subs);
    });
    it('should take a never source and return never too', function () {
        var e1 = cold('-');
        var e1subs = '^';
        var expected = '-';
        expectObservable(e1.mergeAll()).toBe(expected);
        expectSubscriptions(e1.subscriptions).toBe(e1subs);
    });
    it('should take a throw source and return throw too', function () {
        var e1 = cold('#');
        var e1subs = '(^!)';
        var expected = '#';
        expectObservable(e1.mergeAll()).toBe(expected);
        expectSubscriptions(e1.subscriptions).toBe(e1subs);
    });
    it('should handle merging a hot observable of non-overlapped observables', function () {
        var x = cold('a-b---------|                 ');
        var xsubs = '  ^           !                 ';
        var y = cold('c-d-e-f-|           ');
        var ysubs = '            ^       !           ';
        var z = cold('g-h-i-j-k-|');
        var zsubs = '                     ^         !';
        var e1 = hot('--x---------y--------z--------| ', { x: x, y: y, z: z });
        var e1subs = '^                              !';
        var expected = '--a-b-------c-d-e-f--g-h-i-j-k-|';
        expectObservable(e1.mergeAll()).toBe(expected);
        expectSubscriptions(x.subscriptions).toBe(xsubs);
        expectSubscriptions(y.subscriptions).toBe(ysubs);
        expectSubscriptions(z.subscriptions).toBe(zsubs);
        expectSubscriptions(e1.subscriptions).toBe(e1subs);
    });
    it('should raise error if inner observable raises error', function () {
        var x = cold('a-b---------|                 ');
        var xsubs = '  ^           !                 ';
        var y = cold('c-d-e-f-#           ');
        var ysubs = '            ^       !           ';
        var z = cold('g-h-i-j-k-|');
        var zsubs = [];
        var e1 = hot('--x---------y--------z--------| ', { x: x, y: y, z: z });
        var e1subs = '^                   !           ';
        var expected = '--a-b-------c-d-e-f-#           ';
        expectObservable(e1.mergeAll()).toBe(expected);
        expectSubscriptions(x.subscriptions).toBe(xsubs);
        expectSubscriptions(y.subscriptions).toBe(ysubs);
        expectSubscriptions(z.subscriptions).toBe(zsubs);
        expectSubscriptions(e1.subscriptions).toBe(e1subs);
    });
    it('should raise error if outer observable raises error', function () {
        var y = cold('a-b---------|                ');
        var ysubs = '  ^           !                ';
        var z = cold('c-d-e-f-|          ');
        var zsubs = '            ^   !              ';
        var e1 = hot('--y---------z---#              ', { y: y, z: z });
        var e1subs = '^               !              ';
        var expected = '--a-b-------c-d-#              ';
        expectObservable(e1.mergeAll()).toBe(expected);
        expectSubscriptions(y.subscriptions).toBe(ysubs);
        expectSubscriptions(z.subscriptions).toBe(zsubs);
        expectSubscriptions(e1.subscriptions).toBe(e1subs);
    });
    it('should merge all promises in an observable', function (done) {
        var e1 = Rx.Observable.from([
            new Promise(function (res) { res('a'); }),
            new Promise(function (res) { res('b'); }),
            new Promise(function (res) { res('c'); }),
            new Promise(function (res) { res('d'); }),
        ]);
        var expected = ['a', 'b', 'c', 'd'];
        var res = [];
        e1.mergeAll().subscribe(function (x) { res.push(x); }, function (err) { done(new Error('should not be called')); }, function () {
            chai_1.expect(res).to.deep.equal(expected);
            done();
        });
    });
    it('should raise error when promise rejects', function (done) {
        var error = 'error';
        var e1 = Rx.Observable.from([
            new Promise(function (res) { res('a'); }),
            new Promise(function (res, rej) { rej(error); }),
            new Promise(function (res) { res('c'); }),
            new Promise(function (res) { res('d'); }),
        ]);
        var res = [];
        e1.mergeAll().subscribe(function (x) { res.push(x); }, function (err) {
            chai_1.expect(res.length).to.equal(1);
            chai_1.expect(err).to.equal('error');
            done();
        }, function () { done(new Error('should not be called')); });
    });
});
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