JezK

Edit File: race-legacy-spec.js

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
var chai_1 = require("chai");
var sinon = require("sinon");
var rxjs_1 = require("rxjs");
var operators_1 = require("rxjs/operators");
var testing_1 = require("rxjs/testing");
var observableMatcher_1 = require("../helpers/observableMatcher");
describe('race operator', function () {
    var testScheduler;
    beforeEach(function () {
        testScheduler = new testing_1.TestScheduler(observableMatcher_1.observableMatcher);
    });
    it('should race cold and cold', function () {
        testScheduler.run(function (_a) {
            var cold = _a.cold, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var e1 = cold(' ---a-----b-----c----|   ');
            var e1subs = '  ^-------------------!   ';
            var e2 = cold(' ------x-----y-----z----|');
            var e2subs = '  ^--!                    ';
            var expected = '---a-----b-----c----|   ';
            var result = e1.pipe((0, operators_1.race)(e2));
            expectObservable(result).toBe(expected);
            expectSubscriptions(e1.subscriptions).toBe(e1subs);
            expectSubscriptions(e2.subscriptions).toBe(e2subs);
        });
    });
    it('should race cold and cold and accept an Array of Observable argument', function () {
        testScheduler.run(function (_a) {
            var cold = _a.cold, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var e1 = cold(' ---a-----b-----c----|   ');
            var e1subs = '  ^-------------------!   ';
            var e2 = cold(' ------x-----y-----z----|');
            var e2subs = '  ^--!                    ';
            var expected = '---a-----b-----c----|   ';
            var result = e1.pipe((0, operators_1.race)([e2]));
            expectObservable(result).toBe(expected);
            expectSubscriptions(e1.subscriptions).toBe(e1subs);
            expectSubscriptions(e2.subscriptions).toBe(e2subs);
        });
    });
    it('should race hot and hot', function () {
        testScheduler.run(function (_a) {
            var hot = _a.hot, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var e1 = hot('  ---a-----b-----c----|   ');
            var e1subs = '  ^-------------------!   ';
            var e2 = hot('  ------x-----y-----z----|');
            var e2subs = '  ^--!                    ';
            var expected = '---a-----b-----c----|   ';
            var result = e1.pipe((0, operators_1.race)(e2));
            expectObservable(result).toBe(expected);
            expectSubscriptions(e1.subscriptions).toBe(e1subs);
            expectSubscriptions(e2.subscriptions).toBe(e2subs);
        });
    });
    it('should race hot and cold', function () {
        testScheduler.run(function (_a) {
            var cold = _a.cold, hot = _a.hot, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var e1 = cold(' ---a-----b-----c----|   ');
            var e1subs = '  ^-------------------!   ';
            var e2 = hot('  ------x-----y-----z----|');
            var e2subs = '  ^--!                    ';
            var expected = '---a-----b-----c----|   ';
            var result = e1.pipe((0, operators_1.race)(e2));
            expectObservable(result).toBe(expected);
            expectSubscriptions(e1.subscriptions).toBe(e1subs);
            expectSubscriptions(e2.subscriptions).toBe(e2subs);
        });
    });
    it('should race 2nd and 1st', function () {
        testScheduler.run(function (_a) {
            var cold = _a.cold, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var e1 = cold(' ------x-----y-----z----|');
            var e1subs = '  ^--!                    ';
            var e2 = cold(' ---a-----b-----c----|   ');
            var e2subs = '  ^-------------------!   ';
            var expected = '---a-----b-----c----|   ';
            var result = e1.pipe((0, operators_1.race)(e2));
            expectObservable(result).toBe(expected);
            expectSubscriptions(e1.subscriptions).toBe(e1subs);
            expectSubscriptions(e2.subscriptions).toBe(e2subs);
        });
    });
    it('should race emit and complete', function () {
        testScheduler.run(function (_a) {
            var cold = _a.cold, hot = _a.hot, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var e1 = cold(' -----|                  ');
            var e1subs = '  ^----!                  ';
            var e2 = hot('  ------x-----y-----z----|');
            var e2subs = '  ^----!                  ';
            var expected = '-----|                  ';
            var result = e1.pipe((0, operators_1.race)(e2));
            expectObservable(result).toBe(expected);
            expectSubscriptions(e1.subscriptions).toBe(e1subs);
            expectSubscriptions(e2.subscriptions).toBe(e2subs);
        });
    });
    it('should allow unsubscribing early and explicitly', function () {
        testScheduler.run(function (_a) {
            var cold = _a.cold, hot = _a.hot, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var e1 = cold('---a-----b-----c----|   ');
            var e1subs = ' ^-----------!           ';
            var e2 = hot(' ------x-----y-----z----|');
            var e2subs = '  ^--!                   ';
            var expected = '---a-----b---          ';
            var unsub = '   ------------!          ';
            var result = e1.pipe((0, operators_1.race)(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 () {
        testScheduler.run(function (_a) {
            var hot = _a.hot, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            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 = e1.pipe((0, operators_1.mergeMap)(function (x) { return (0, rxjs_1.of)(x); }), (0, operators_1.race)(e2), (0, operators_1.mergeMap)(function (x) { return (0, rxjs_1.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 () {
        testScheduler.run(function (_a) {
            var cold = _a.cold, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var e1 = cold(' ---|');
            var e2 = cold(' ---|');
            var e1subs = '  ^--!';
            var expected = '---|';
            var source = e1.pipe((0, operators_1.race)(e2));
            expectObservable(source).toBe(expected);
            expectSubscriptions(e1.subscriptions).toBe(e1subs);
        });
    });
    it('should throw when error occurs mid stream', function () {
        testScheduler.run(function (_a) {
            var cold = _a.cold, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var e1 = cold(' ---a-----#              ');
            var e1subs = '  ^--------!              ';
            var e2 = cold(' ------x-----y-----z----|');
            var e2subs = '  ^--!                    ';
            var expected = '---a-----#              ';
            var result = e1.pipe((0, operators_1.race)(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 () {
        testScheduler.run(function (_a) {
            var cold = _a.cold, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var e1 = cold(' ---#                    ');
            var e1subs = '  ^--!                    ';
            var e2 = cold(' ------x-----y-----z----|');
            var e2subs = '  ^--!                    ';
            var expected = '---#                    ';
            var result = e1.pipe((0, operators_1.race)(e2));
            expectObservable(result).toBe(expected);
            expectSubscriptions(e1.subscriptions).toBe(e1subs);
            expectSubscriptions(e2.subscriptions).toBe(e2subs);
        });
    });
    it('should allow observable emits immediately', function (done) {
        var e1 = (0, rxjs_1.of)(true);
        var e2 = (0, rxjs_1.timer)(200).pipe((0, operators_1.map)(function (_) { return false; }));
        e1.pipe((0, operators_1.race)(e2)).subscribe({
            next: function (x) {
                (0, chai_1.expect)(x).to.be.true;
            },
            error: done,
            complete: done,
        });
    });
    it('should ignore latter observables if a former one emits immediately', function () {
        var onNext = sinon.spy();
        var onSubscribe = sinon.spy();
        var e1 = (0, rxjs_1.of)('a');
        var e2 = (0, rxjs_1.defer)(onSubscribe);
        e1.pipe((0, operators_1.race)(e2)).subscribe(onNext);
        (0, chai_1.expect)(onNext.calledWithExactly('a')).to.be.true;
        (0, chai_1.expect)(onSubscribe.called).to.be.false;
    });
    it('should ignore latter observables if a former one completes immediately', function () {
        var onComplete = sinon.spy();
        var onSubscribe = sinon.spy();
        var e1 = rxjs_1.EMPTY;
        var e2 = (0, rxjs_1.defer)(onSubscribe);
        e1.pipe((0, operators_1.race)(e2)).subscribe({ complete: onComplete });
        (0, chai_1.expect)(onComplete.calledWithExactly()).to.be.true;
        (0, chai_1.expect)(onSubscribe.called).to.be.false;
    });
    it('should ignore latter observables if a former one errors immediately', function () {
        var onError = sinon.spy();
        var onSubscribe = sinon.spy();
        var e1 = (0, rxjs_1.throwError)(function () { return 'kaboom'; });
        var e2 = (0, rxjs_1.defer)(onSubscribe);
        e1.pipe((0, operators_1.race)(e2)).subscribe({ error: onError });
        (0, chai_1.expect)(onError.calledWithExactly('kaboom')).to.be.true;
        (0, chai_1.expect)(onSubscribe.called).to.be.false;
    });
    it('should unsubscribe former observables if a latter one emits immediately', function () {
        var onNext = sinon.spy();
        var onUnsubscribe = sinon.spy();
        var e1 = rxjs_1.NEVER.pipe((0, operators_1.finalize)(onUnsubscribe));
        var e2 = (0, rxjs_1.of)('b');
        e1.pipe((0, operators_1.race)(e2)).subscribe(onNext);
        (0, chai_1.expect)(onNext.calledWithExactly('b')).to.be.true;
        (0, chai_1.expect)(onUnsubscribe.calledOnce).to.be.true;
    });
    it('should unsubscribe from immediately emitting observable on unsubscription', function () {
        var onNext = sinon.spy();
        var onUnsubscribe = sinon.spy();
        var e1 = rxjs_1.NEVER.pipe((0, operators_1.startWith)('a'), (0, operators_1.finalize)(onUnsubscribe));
        var e2 = rxjs_1.NEVER;
        var subscription = e1.pipe((0, operators_1.race)(e2)).subscribe(onNext);
        (0, chai_1.expect)(onNext.calledWithExactly('a')).to.be.true;
        (0, chai_1.expect)(onUnsubscribe.called).to.be.false;
        subscription.unsubscribe();
        (0, chai_1.expect)(onUnsubscribe.calledOnce).to.be.true;
    });
});
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