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

Reactive Extensions for modern JavaScript

"use strict";
var chai_1 = require('chai');
var Rx = require('../../dist/cjs/Rx');
var Observable = Rx.Observable;
var queueScheduler = Rx.Scheduler.queue;
/** @test {merge} */
describe('Observable.prototype.merge', function () {
    asDiagram('merge')('should handle merging two hot observables', function () {
        var e1 = hot('--a-----b-----c----|');
        var e1subs = '^                  !';
        var e2 = hot('-----d-----e-----f---|');
        var e2subs = '^                    !';
        var expected = '--a--d--b--e--c--f---|';
        var result = e1.merge(e2, rxTestScheduler);
        expectObservable(result).toBe(expected);
        expectSubscriptions(e1.subscriptions).toBe(e1subs);
        expectSubscriptions(e2.subscriptions).toBe(e2subs);
    });
    it('should merge a source with a second', function (done) {
        var a = Observable.of(1, 2, 3);
        var b = Observable.of(4, 5, 6, 7, 8);
        var r = [1, 2, 3, 4, 5, 6, 7, 8];
        a.merge(b).subscribe(function (val) {
            chai_1.expect(val).to.equal(r.shift());
        }, function (x) {
            done(new Error('should not be called'));
        }, function () {
            done();
        });
    });
    it('should merge an immediately-scheduled source with an immediately-scheduled second', function (done) {
        var a = Observable.of(1, 2, 3, queueScheduler);
        var b = Observable.of(4, 5, 6, 7, 8, queueScheduler);
        var r = [1, 2, 4, 3, 5, 6, 7, 8];
        a.merge(b, queueScheduler).subscribe(function (val) {
            chai_1.expect(val).to.equal(r.shift());
        }, function (x) {
            done(new Error('should not be called'));
        }, function () {
            done();
        });
    });
    it('should merge cold and cold', function () {
        var e1 = cold('---a-----b-----c----|');
        var e1subs = '^                   !';
        var e2 = cold('------x-----y-----z----|');
        var e2subs = '^                      !';
        var expected = '---a--x--b--y--c--z----|';
        var result = e1.merge(e2, rxTestScheduler);
        expectObservable(result).toBe(expected);
        expectSubscriptions(e1.subscriptions).toBe(e1subs);
        expectSubscriptions(e2.subscriptions).toBe(e2subs);
    });
    it('should merge hot and hot', function () {
        var e1 = hot('---a---^-b-----c----|');
        var e1subs = '^            !';
        var e2 = hot('-----x-^----y-----z----|');
        var e2subs = '^               !';
        var expected = '--b--y--c--z----|';
        var result = e1.merge(e2, rxTestScheduler);
        expectObservable(result).toBe(expected);
        expectSubscriptions(e1.subscriptions).toBe(e1subs);
        expectSubscriptions(e2.subscriptions).toBe(e2subs);
    });
    it('should merge hot and cold', function () {
        var e1 = hot('---a-^---b-----c----|');
        var e1subs = '^              !';
        var e2 = cold('--x-----y-----z----|');
        var e2subs = '^                  !';
        var expected = '--x-b---y-c---z----|';
        var result = e1.merge(e2, rxTestScheduler);
        expectObservable(result).toBe(expected);
        expectSubscriptions(e1.subscriptions).toBe(e1subs);
        expectSubscriptions(e2.subscriptions).toBe(e2subs);
    });
    it('should merge parallel emissions', function () {
        var e1 = hot('---a----b----c----|');
        var e1subs = '^                 !';
        var e2 = hot('---x----y----z----|');
        var e2subs = '^                 !';
        var expected = '---(ax)-(by)-(cz)-|';
        var result = e1.merge(e2, rxTestScheduler);
        expectObservable(result).toBe(expected);
        expectSubscriptions(e1.subscriptions).toBe(e1subs);
        expectSubscriptions(e2.subscriptions).toBe(e2subs);
    });
    it('should allow unsubscribing explicitly and early', function () {
        var e1 = hot('--a-----b-----c----|  ');
        var e1subs = '^         !           ';
        var e2 = hot('-----d-----e-----f---|');
        var e2subs = '^         !           ';
        var expected = '--a--d--b--           ';
        var unsub = '          !           ';
        var result = e1.merge(e2, rxTestScheduler);
        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 = hot('--a-----b-----c----|  ');
        var e1subs = '^         !           ';
        var e2 = hot('-----d-----e-----f---|');
        var e2subs = '^         !           ';
        var expected = '--a--d--b--           ';
        var unsub = '          !           ';
        var result = e1
            .map(function (x) { return x; })
            .merge(e2, rxTestScheduler)
            .map(function (x) { return x; });
        expectObservable(result, unsub).toBe(expected);
        expectSubscriptions(e1.subscriptions).toBe(e1subs);
        expectSubscriptions(e2.subscriptions).toBe(e2subs);
    });
    it('should merge empty and empty', function () {
        var e1 = cold('|');
        var e1subs = '(^!)';
        var e2 = cold('|');
        var e2subs = '(^!)';
        var result = e1.merge(e2, rxTestScheduler);
        expectObservable(result).toBe('|');
        expectSubscriptions(e1.subscriptions).toBe(e1subs);
        expectSubscriptions(e2.subscriptions).toBe(e2subs);
    });
    it('should merge three empties', function () {
        var e1 = cold('|');
        var e1subs = '(^!)';
        var e2 = cold('|');
        var e2subs = '(^!)';
        var e3 = cold('|');
        var e3subs = '(^!)';
        var result = e1.merge(e2, e3, rxTestScheduler);
        expectObservable(result).toBe('|');
        expectSubscriptions(e1.subscriptions).toBe(e1subs);
        expectSubscriptions(e2.subscriptions).toBe(e2subs);
        expectSubscriptions(e3.subscriptions).toBe(e3subs);
    });
    it('should merge never and empty', function () {
        var e1 = cold('-');
        var e1subs = '^';
        var e2 = cold('|');
        var e2subs = '(^!)';
        var result = e1.merge(e2, rxTestScheduler);
        expectObservable(result).toBe('-');
        expectSubscriptions(e1.subscriptions).toBe(e1subs);
        expectSubscriptions(e2.subscriptions).toBe(e2subs);
    });
    it('should merge never and never', function () {
        var e1 = cold('-');
        var e1subs = '^';
        var e2 = cold('-');
        var e2subs = '^';
        var result = e1.merge(e2, rxTestScheduler);
        expectObservable(result).toBe('-');
        expectSubscriptions(e1.subscriptions).toBe(e1subs);
        expectSubscriptions(e2.subscriptions).toBe(e2subs);
    });
    it('should merge empty and throw', function () {
        var e1 = cold('|');
        var e1subs = '(^!)';
        var e2 = cold('#');
        var e2subs = '(^!)';
        var result = e1.merge(e2, rxTestScheduler);
        expectObservable(result).toBe('#');
        expectSubscriptions(e1.subscriptions).toBe(e1subs);
        expectSubscriptions(e2.subscriptions).toBe(e2subs);
    });
    it('should merge hot and throw', function () {
        var e1 = hot('--a--b--c--|');
        var e1subs = '(^!)';
        var e2 = cold('#');
        var e2subs = '(^!)';
        var result = e1.merge(e2, rxTestScheduler);
        expectObservable(result).toBe('#');
        expectSubscriptions(e1.subscriptions).toBe(e1subs);
        expectSubscriptions(e2.subscriptions).toBe(e2subs);
    });
    it('should merge never and throw', function () {
        var e1 = cold('-');
        var e1subs = '(^!)';
        var e2 = cold('#');
        var e2subs = '(^!)';
        var result = e1.merge(e2, rxTestScheduler);
        expectObservable(result).toBe('#');
        expectSubscriptions(e1.subscriptions).toBe(e1subs);
        expectSubscriptions(e2.subscriptions).toBe(e2subs);
    });
    it('should merge empty and eventual error', function () {
        var e1 = cold('|');
        var e1subs = '(^!)    ';
        var e2 = hot('-------#');
        var e2subs = '^      !';
        var expected = '-------#';
        var result = e1.merge(e2, rxTestScheduler);
        expectObservable(result).toBe(expected);
        expectSubscriptions(e1.subscriptions).toBe(e1subs);
        expectSubscriptions(e2.subscriptions).toBe(e2subs);
    });
    it('should merge hot and error', function () {
        var e1 = hot('--a--b--c--|');
        var e1subs = '^      !    ';
        var e2 = hot('-------#    ');
        var e2subs = '^      !    ';
        var expected = '--a--b-#    ';
        var result = e1.merge(e2, rxTestScheduler);
        expectObservable(result).toBe(expected);
        expectSubscriptions(e1.subscriptions).toBe(e1subs);
        expectSubscriptions(e2.subscriptions).toBe(e2subs);
    });
    it('should merge never and error', function () {
        var e1 = hot('-');
        var e1subs = '^      !';
        var e2 = hot('-------#');
        var e2subs = '^      !';
        var expected = '-------#';
        var result = e1.merge(e2, rxTestScheduler);
        expectObservable(result).toBe(expected);
        expectSubscriptions(e1.subscriptions).toBe(e1subs);
        expectSubscriptions(e2.subscriptions).toBe(e2subs);
    });
});
describe('Observable.prototype.mergeAll', function () {
    it('should merge two observables', function (done) {
        var a = Observable.of(1, 2, 3);
        var b = Observable.of(4, 5, 6, 7, 8);
        var r = [1, 2, 3, 4, 5, 6, 7, 8];
        Observable.of(a, b).mergeAll().subscribe(function (val) {
            chai_1.expect(val).to.equal(r.shift());
        }, null, done);
    });
    it('should merge two immediately-scheduled observables', function (done) {
        var a = Observable.of(1, 2, 3, queueScheduler);
        var b = Observable.of(4, 5, 6, 7, 8, queueScheduler);
        var r = [1, 2, 4, 3, 5, 6, 7, 8];
        Observable.of(a, b, queueScheduler).mergeAll().subscribe(function (val) {
            chai_1.expect(val).to.equal(r.shift());
        }, null, done);
    });
});
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