@reactivex/rxjs/spec-js/operators/concatAll-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 {concatAll} */
describe('Observable.prototype.concatAll', function () {
    asDiagram('concatAll')('should concat an observable of observables', function () {
        var x = cold('----a------b------|                 ');
        var y = cold('---c-d---|        ');
        var z = cold('---e--f-|');
        var outer = hot('-x---y----z------|              ', { x: x, y: y, z: z });
        var expected = '-----a------b---------c-d------e--f-|';
        var result = outer.concatAll();
        expectObservable(result).toBe(expected);
    });
    it('should concat sources from promise', function (done) {
        this.timeout(2000);
        var sources = Rx.Observable.from([
            new Promise(function (res) { res(0); }),
            new Promise(function (res) { res(1); }),
            new Promise(function (res) { res(2); }),
            new Promise(function (res) { res(3); }),
        ]).take(10);
        var res = [];
        sources.concatAll().subscribe(function (x) { res.push(x); }, function (err) { done(new Error('should not be called')); }, function () {
            chai_1.expect(res).to.deep.equal([0, 1, 2, 3]);
            done();
        });
    });
    it('should concat and raise error from promise', function (done) {
        this.timeout(2000);
        var sources = Rx.Observable.from([
            new Promise(function (res) { res(0); }),
            new Promise(function (res, rej) { rej(1); }),
            new Promise(function (res) { res(2); }),
            new Promise(function (res) { res(3); }),
        ]).take(10);
        var res = [];
        sources.concatAll().subscribe(function (x) { res.push(x); }, function (err) {
            chai_1.expect(res.length).to.equal(1);
            chai_1.expect(err).to.equal(1);
            done();
        }, function () { done(new Error('should not be called')); });
    });
    it('should concat all observables in an observable', function () {
        var e1 = Rx.Observable.from([
            Rx.Observable.of('a'),
            Rx.Observable.of('b'),
            Rx.Observable.of('c')
        ]).take(10);
        var expected = '(abc|)';
        expectObservable(e1.concatAll()).toBe(expected);
    });
    it('should throw if any child observable throws', function () {
        var e1 = Rx.Observable.from([
            Rx.Observable.of('a'),
            Rx.Observable.throw('error'),
            Rx.Observable.of('c')
        ]).take(10);
        var expected = '(a#)';
        expectObservable(e1.concatAll()).toBe(expected);
    });
    it('should concat merging a hot observable of non-overlapped observables', function () {
        var values = {
            x: cold('a-b---------|'),
            y: cold('c-d-e-f-|'),
            z: cold('g-h-i-j-k-|')
        };
        var e1 = hot('--x---------y--------z--------|', values);
        var expected = '--a-b---------c-d-e-f-g-h-i-j-k-|';
        expectObservable(e1.concatAll()).toBe(expected);
    });
    it('should raise error if inner observable raises error', function () {
        var values = {
            x: cold('a-b---------|'),
            y: cold('c-d-e-f-#'),
            z: cold('g-h-i-j-k-|')
        };
        var e1 = hot('--x---------y--------z--------|', values);
        var expected = '--a-b---------c-d-e-f-#';
        expectObservable(e1.concatAll()).toBe(expected);
    });
    it('should raise error if outer observable raises error', function () {
        var values = {
            y: cold('a-b---------|'),
            z: cold('c-d-e-f-|'),
        };
        var e1 = hot('--y---------z---#    ', values);
        var expected = '--a-b---------c-#';
        expectObservable(e1.concatAll()).toBe(expected);
    });
    it('should complete without emit if both sources are empty', function () {
        var e1 = cold('--|');
        var e1subs = '^ !';
        var e2 = cold('----|');
        var e2subs = '  ^   !';
        var expected = '------|';
        var result = Observable.of(e1, e2).concatAll();
        expectObservable(result).toBe(expected);
        expectSubscriptions(e1.subscriptions).toBe(e1subs);
        expectSubscriptions(e2.subscriptions).toBe(e2subs);
    });
    it('should not complete if first source does not completes', function () {
        var e1 = cold('-');
        var e1subs = '^';
        var e2 = cold('--|');
        var e2subs = [];
        var expected = '-';
        var result = Observable.of(e1, e2).concatAll();
        expectObservable(result).toBe(expected);
        expectSubscriptions(e1.subscriptions).toBe(e1subs);
        expectSubscriptions(e2.subscriptions).toBe(e2subs);
    });
    it('should not complete if second source does not completes', function () {
        var e1 = cold('--|');
        var e1subs = '^ !';
        var e2 = cold('---');
        var e2subs = '  ^';
        var expected = '---';
        var result = Observable.of(e1, e2).concatAll();
        expectObservable(result).toBe(expected);
        expectSubscriptions(e1.subscriptions).toBe(e1subs);
        expectSubscriptions(e2.subscriptions).toBe(e2subs);
    });
    it('should not complete if both sources do not complete', function () {
        var e1 = cold('-');
        var e1subs = '^';
        var e2 = cold('-');
        var e2subs = [];
        var expected = '-';
        var result = Observable.of(e1, e2).concatAll();
        expectObservable(result).toBe(expected);
        expectSubscriptions(e1.subscriptions).toBe(e1subs);
        expectSubscriptions(e2.subscriptions).toBe(e2subs);
    });
    it('should raise error when first source is empty, second source raises error', function () {
        var e1 = cold('--|');
        var e1subs = '^ !';
        var e2 = cold('----#');
        var e2subs = '  ^   !';
        var expected = '------#';
        var result = Observable.of(e1, e2).concatAll();
        expectObservable(result).toBe(expected);
        expectSubscriptions(e1.subscriptions).toBe(e1subs);
        expectSubscriptions(e2.subscriptions).toBe(e2subs);
    });
    it('should raise error when first source raises error, second source is empty', function () {
        var e1 = cold('---#');
        var e1subs = '^  !';
        var e2 = cold('----|');
        var e2subs = [];
        var expected = '---#';
        var result = Observable.of(e1, e2).concatAll();
        expectObservable(result).toBe(expected);
        expectSubscriptions(e1.subscriptions).toBe(e1subs);
        expectSubscriptions(e2.subscriptions).toBe(e2subs);
    });
    it('should raise first error when both source raise error', function () {
        var e1 = cold('---#');
        var e1subs = '^  !';
        var e2 = cold('------#');
        var e2subs = [];
        var expected = '---#';
        var result = Observable.of(e1, e2).concatAll();
        expectObservable(result).toBe(expected);
        expectSubscriptions(e1.subscriptions).toBe(e1subs);
        expectSubscriptions(e2.subscriptions).toBe(e2subs);
    });
    it('should concat if first source emits once, second source is empty', function () {
        var e1 = cold('--a--|');
        var e1subs = '^    !';
        var e2 = cold('--------|');
        var e2subs = '     ^       !';
        var expected = '--a----------|';
        var result = Observable.of(e1, e2).concatAll();
        expectObservable(result).toBe(expected);
        expectSubscriptions(e1.subscriptions).toBe(e1subs);
        expectSubscriptions(e2.subscriptions).toBe(e2subs);
    });
    it('should concat if first source is empty, second source emits once', function () {
        var e1 = cold('--|');
        var e1subs = '^ !';
        var e2 = cold('--a--|');
        var e2subs = '  ^    !';
        var expected = '----a--|';
        var result = Observable.of(e1, e2).concatAll();
        expectObservable(result).toBe(expected);
        expectSubscriptions(e1.subscriptions).toBe(e1subs);
        expectSubscriptions(e2.subscriptions).toBe(e2subs);
    });
    it('should emit element from first source, and should not complete if second ' +
        'source does not completes', function () {
        var e1 = cold('--a--|');
        var e1subs = '^    !';
        var e2 = cold('-');
        var e2subs = '     ^';
        var expected = '--a---';
        var result = Observable.of(e1, e2).concatAll();
        expectObservable(result).toBe(expected);
        expectSubscriptions(e1.subscriptions).toBe(e1subs);
        expectSubscriptions(e2.subscriptions).toBe(e2subs);
    });
    it('should not complete if first source does not complete', function () {
        var e1 = cold('-');
        var e1subs = '^';
        var e2 = cold('--a--|');
        var e2subs = [];
        var expected = '-';
        var result = Observable.of(e1, e2).concatAll();
        expectObservable(result).toBe(expected);
        expectSubscriptions(e1.subscriptions).toBe(e1subs);
        expectSubscriptions(e2.subscriptions).toBe(e2subs);
    });
    it('should emit elements from each source when source emit once', function () {
        var e1 = cold('---a|');
        var e1subs = '^   !';
        var e2 = cold('-----b--|');
        var e2subs = '    ^       !';
        var expected = '---a-----b--|';
        var result = Observable.of(e1, e2).concatAll();
        expectObservable(result).toBe(expected);
        expectSubscriptions(e1.subscriptions).toBe(e1subs);
        expectSubscriptions(e2.subscriptions).toBe(e2subs);
    });
    it('should unsubscribe to inner source if outer is unsubscribed early', function () {
        var e1 = cold('---a-a--a|            ');
        var e1subs = '^        !            ';
        var e2 = cold('-----b-b--b-|');
        var e2subs = '         ^       !    ';
        var unsub = '                 !    ';
        var expected = '---a-a--a-----b-b     ';
        var result = Observable.of(e1, e2).concatAll();
        expectObservable(result, unsub).toBe(expected);
        expectSubscriptions(e1.subscriptions).toBe(e1subs);
        expectSubscriptions(e2.subscriptions).toBe(e2subs);
    });
    it('should not break unsubscription chains when result is unsubscribed explicitly', function () {
        var e1 = cold('---a-a--a|            ');
        var e1subs = '^        !            ';
        var e2 = cold('-----b-b--b-|');
        var e2subs = '         ^       !    ';
        var expected = '---a-a--a-----b-b-    ';
        var unsub = '                 !    ';
        var result = Observable.of(e1, e2)
            .mergeMap(function (x) { return Observable.of(x); })
            .concatAll()
            .mergeMap(function (x) { return Observable.of(x); });
        expectObservable(result, unsub).toBe(expected);
        expectSubscriptions(e1.subscriptions).toBe(e1subs);
        expectSubscriptions(e2.subscriptions).toBe(e2subs);
    });
    it('should raise error from first source and does not emit from second source', function () {
        var e1 = cold('--#');
        var e1subs = '^ !';
        var e2 = cold('----a--|');
        var e2subs = [];
        var expected = '--#';
        var result = Observable.of(e1, e2).concatAll();
        expectObservable(result).toBe(expected);
        expectSubscriptions(e1.subscriptions).toBe(e1subs);
        expectSubscriptions(e2.subscriptions).toBe(e2subs);
    });
    it('should emit element from first source then raise error from second source', function () {
        var e1 = cold('--a--|');
        var e1subs = '^    !';
        var e2 = cold('-------#');
        var e2subs = '     ^      !';
        var expected = '--a---------#';
        var result = Observable.of(e1, e2).concatAll();
        expectObservable(result).toBe(expected);
        expectSubscriptions(e1.subscriptions).toBe(e1subs);
        expectSubscriptions(e2.subscriptions).toBe(e2subs);
    });
    it('should emit all elements from both hot observable sources if first source ' +
        'completes before second source starts emit', function () {
        var e1 = hot('--a--b-|');
        var e1subs = '^      !';
        var e2 = hot('--------x--y--|');
        var e2subs = '       ^      !';
        var expected = '--a--b--x--y--|';
        var result = Observable.of(e1, e2).concatAll();
        expectObservable(result).toBe(expected);
        expectSubscriptions(e1.subscriptions).toBe(e1subs);
        expectSubscriptions(e2.subscriptions).toBe(e2subs);
    });
    it('should emit elements from second source regardless of completion time ' +
        'when second source is cold observable', function () {
        var e1 = hot('--a--b--c---|');
        var e1subs = '^           !';
        var e2 = cold('-x-y-z-|');
        var e2subs = '            ^      !';
        var expected = '--a--b--c----x-y-z-|';
        var result = Observable.of(e1, e2).concatAll();
        expectObservable(result).toBe(expected);
        expectSubscriptions(e1.subscriptions).toBe(e1subs);
        expectSubscriptions(e2.subscriptions).toBe(e2subs);
    });
    it('should not emit collapsing element from second source', function () {
        var e1 = hot('--a--b--c--|');
        var e1subs = '^          !';
        var e2 = hot('--------x--y--z--|');
        var e2subs = '           ^     !';
        var expected = '--a--b--c--y--z--|';
        var result = Observable.of(e1, e2).concatAll();
        expectObservable(result).toBe(expected);
        expectSubscriptions(e1.subscriptions).toBe(e1subs);
        expectSubscriptions(e2.subscriptions).toBe(e2subs);
    });
    it('should be able to work on a different scheduler', function () {
        var e1 = cold('---a|');
        var e1subs = '^   !';
        var e2 = cold('---b--|');
        var e2subs = '    ^     !';
        var e3 = cold('---c--|');
        var e3subs = '          ^     !';
        var expected = '---a---b-----c--|';
        var result = Observable.of(e1, e2, e3, rxTestScheduler).concatAll();
        expectObservable(result).toBe(expected);
        expectSubscriptions(e1.subscriptions).toBe(e1subs);
        expectSubscriptions(e2.subscriptions).toBe(e2subs);
        expectSubscriptions(e3.subscriptions).toBe(e3subs);
    });
    it('should concatAll a nested observable with a single inner observable', function () {
        var e1 = cold('---a-|');
        var e1subs = '^    !';
        var expected = '---a-|';
        var result = Observable.of(e1).concatAll();
        expectObservable(result).toBe(expected);
        expectSubscriptions(e1.subscriptions).toBe(e1subs);
    });
    it('should concatAll a nested observable with a single inner observable, and a scheduler', function () {
        var e1 = cold('---a-|');
        var e1subs = '^    !';
        var expected = '---a-|';
        var result = Observable.of(e1, rxTestScheduler).concatAll();
        expectObservable(result).toBe(expected);
        expectSubscriptions(e1.subscriptions).toBe(e1subs);
    });
});
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