JezK

Edit File: switchAll-spec.js

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
var chai_1 = require("chai");
var rxjs_1 = require("rxjs");
var operators_1 = require("rxjs/operators");
var testing_1 = require("rxjs/testing");
var observableMatcher_1 = require("../helpers/observableMatcher");
describe('switchAll', function () {
    var testScheduler;
    beforeEach(function () {
        testScheduler = new testing_1.TestScheduler(observableMatcher_1.observableMatcher);
    });
    it('should switch a hot observable of cold observables', function () {
        testScheduler.run(function (_a) {
            var hot = _a.hot, cold = _a.cold, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var x = cold('    --a---b--c---d--|      ');
            var xsubs = '   --^------!               ';
            var y = cold('           ----e---f--g---|');
            var ysubs = '   ---------^--------------!';
            var e1 = hot('  --x------y-------|       ', { x: x, y: y });
            var e1subs = '  ^----------------!       ';
            var expected = '----a---b----e---f--g---|';
            var result = e1.pipe((0, operators_1.switchAll)());
            expectObservable(result).toBe(expected);
            expectSubscriptions(x.subscriptions).toBe(xsubs);
            expectSubscriptions(y.subscriptions).toBe(ysubs);
            expectSubscriptions(e1.subscriptions).toBe(e1subs);
        });
    });
    it('should switch to each immediately-scheduled inner Observable', function (done) {
        var a = (0, rxjs_1.scheduled)([1, 2, 3], rxjs_1.queueScheduler);
        var b = (0, rxjs_1.scheduled)([4, 5, 6], rxjs_1.queueScheduler);
        var r = [1, 4, 5, 6];
        var i = 0;
        (0, rxjs_1.scheduled)([a, b], rxjs_1.queueScheduler)
            .pipe((0, operators_1.switchAll)())
            .subscribe({
            next: function (x) {
                (0, chai_1.expect)(x).to.equal(r[i++]);
            },
            complete: done,
        });
    });
    it('should unsub inner observables', function () {
        var unsubbed = [];
        (0, rxjs_1.of)('a', 'b')
            .pipe((0, operators_1.map)(function (x) {
            return new rxjs_1.Observable(function (subscriber) {
                subscriber.complete();
                return function () {
                    unsubbed.push(x);
                };
            });
        }), (0, operators_1.switchAll)())
            .subscribe();
        (0, chai_1.expect)(unsubbed).to.deep.equal(['a', 'b']);
    });
    it('should switch to each inner Observable', function (done) {
        var a = (0, rxjs_1.of)(1, 2, 3);
        var b = (0, rxjs_1.of)(4, 5, 6);
        var r = [1, 2, 3, 4, 5, 6];
        var i = 0;
        (0, rxjs_1.of)(a, b)
            .pipe((0, operators_1.switchAll)())
            .subscribe({
            next: function (x) {
                (0, chai_1.expect)(x).to.equal(r[i++]);
            },
            complete: done,
        });
    });
    it('should handle a hot observable of observables', function () {
        testScheduler.run(function (_a) {
            var hot = _a.hot, cold = _a.cold, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            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----d--e---f---|';
            var result = e1.pipe((0, operators_1.switchAll)());
            expectObservable(result).toBe(expected);
            expectSubscriptions(e1.subscriptions).toBe(e1subs);
            expectSubscriptions(x.subscriptions).toBe(xsubs);
            expectSubscriptions(y.subscriptions).toBe(ysubs);
        });
    });
    it('should handle a hot observable of observables, outer is unsubscribed early', function () {
        testScheduler.run(function (_a) {
            var hot = _a.hot, cold = _a.cold, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            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 unsub = '   ----------------!            ';
            var expected = '--------a---b---             ';
            var result = e1.pipe((0, operators_1.switchAll)());
            expectObservable(result, unsub).toBe(expected);
            expectSubscriptions(x.subscriptions).toBe(xsubs);
            expectSubscriptions(y.subscriptions).toBe(ysubs);
        });
    });
    it('should not break unsubscription chains when result is unsubscribed explicitly', function () {
        testScheduler.run(function (_a) {
            var hot = _a.hot, cold = _a.cold, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            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 expected = '--------a---b----            ';
            var unsub = '   ----------------!            ';
            var result = e1.pipe((0, operators_1.mergeMap)(function (x) { return (0, rxjs_1.of)(x); }), (0, operators_1.switchAll)(), (0, operators_1.mergeMap)(function (x) { return (0, rxjs_1.of)(x); }));
            expectObservable(result, unsub).toBe(expected);
            expectSubscriptions(x.subscriptions).toBe(xsubs);
            expectSubscriptions(y.subscriptions).toBe(ysubs);
        });
    });
    it('should handle a hot observable of observables, inner never completes', function () {
        testScheduler.run(function (_a) {
            var hot = _a.hot, cold = _a.cold, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            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 expected = '--------a---b----d--e---f-----';
            var result = e1.pipe((0, operators_1.switchAll)());
            expectObservable(result).toBe(expected);
            expectSubscriptions(x.subscriptions).toBe(xsubs);
            expectSubscriptions(y.subscriptions).toBe(ysubs);
        });
    });
    it('should handle a synchronous switch to the second inner observable', function () {
        testScheduler.run(function (_a) {
            var hot = _a.hot, cold = _a.cold, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var x = cold('        --a---b---c--|   ');
            var xsubs = '   ------(^!)             ';
            var y = cold('        ---d--e---f---|  ');
            var ysubs = '   ------^-------------!  ';
            var e1 = hot('  ------(xy)------------|', { x: x, y: y });
            var expected = '---------d--e---f-----|';
            var result = e1.pipe((0, operators_1.switchAll)());
            expectObservable(result).toBe(expected);
            expectSubscriptions(x.subscriptions).toBe(xsubs);
            expectSubscriptions(y.subscriptions).toBe(ysubs);
        });
    });
    it('should handle a hot observable of observables, one inner throws', function () {
        testScheduler.run(function (_a) {
            var hot = _a.hot, cold = _a.cold, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var x = cold('        --a---#                ');
            var xsubs = '   ------^-----!                ';
            var y = cold('                ---d--e---f---|');
            var ysubs = '                                ';
            var e1 = hot('  ------x-------y------|       ', { x: x, y: y });
            var expected = '--------a---#                ';
            var result = e1.pipe((0, operators_1.switchAll)());
            expectObservable(result).toBe(expected);
            expectSubscriptions(x.subscriptions).toBe(xsubs);
            expectSubscriptions(y.subscriptions).toBe(ysubs);
        });
    });
    it('should handle a hot observable of observables, outer throws', function () {
        testScheduler.run(function (_a) {
            var hot = _a.hot, cold = _a.cold, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            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 expected = '--------a---b----d--e-#      ';
            var result = e1.pipe((0, operators_1.switchAll)());
            expectObservable(result).toBe(expected);
            expectSubscriptions(x.subscriptions).toBe(xsubs);
            expectSubscriptions(y.subscriptions).toBe(ysubs);
        });
    });
    it('should handle an empty hot observable', function () {
        testScheduler.run(function (_a) {
            var hot = _a.hot, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var e1 = hot('  ------|');
            var e1subs = '  ^-----!';
            var expected = '------|';
            var result = e1.pipe((0, operators_1.switchAll)());
            expectObservable(result).toBe(expected);
            expectSubscriptions(e1.subscriptions).toBe(e1subs);
        });
    });
    it('should handle a never hot observable', function () {
        testScheduler.run(function (_a) {
            var hot = _a.hot, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var e1 = hot('  -');
            var e1subs = '  ^';
            var expected = '-';
            var result = e1.pipe((0, operators_1.switchAll)());
            expectObservable(result).toBe(expected);
            expectSubscriptions(e1.subscriptions).toBe(e1subs);
        });
    });
    it('should complete not before the outer completes', function () {
        testScheduler.run(function (_a) {
            var hot = _a.hot, cold = _a.cold, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var x = cold('        --a---b---c--|   ');
            var xsubs = '   ------^------------!   ';
            var e1 = hot('  ------x---------------|', { x: x });
            var e1subs = '  ^---------------------!';
            var expected = '--------a---b---c-----|';
            var result = e1.pipe((0, operators_1.switchAll)());
            expectObservable(result).toBe(expected);
            expectSubscriptions(x.subscriptions).toBe(xsubs);
            expectSubscriptions(e1.subscriptions).toBe(e1subs);
        });
    });
    it('should handle an observable of promises', function (done) {
        var expected = [3];
        (0, rxjs_1.of)(Promise.resolve(1), Promise.resolve(2), Promise.resolve(3))
            .pipe((0, operators_1.switchAll)())
            .subscribe({
            next: function (x) {
                (0, chai_1.expect)(x).to.equal(expected.shift());
            },
            complete: function () {
                (0, chai_1.expect)(expected.length).to.equal(0);
                done();
            },
        });
    });
    it('should handle an observable of promises, where last rejects', function (done) {
        (0, rxjs_1.of)(Promise.resolve(1), Promise.resolve(2), Promise.reject(3))
            .pipe((0, operators_1.switchAll)())
            .subscribe({
            next: function () {
                done(new Error('should not be called'));
            },
            error: function (err) {
                (0, chai_1.expect)(err).to.equal(3);
                done();
            },
            complete: function () {
                done(new Error('should not be called'));
            },
        });
    });
    it('should handle an observable with Arrays in it', function () {
        var expected = [1, 2, 3, 4];
        var completed = false;
        (0, rxjs_1.of)(rxjs_1.NEVER, rxjs_1.NEVER, [1, 2, 3, 4])
            .pipe((0, operators_1.switchAll)())
            .subscribe({
            next: function (x) {
                (0, chai_1.expect)(x).to.equal(expected.shift());
            },
            complete: function () {
                completed = true;
                (0, chai_1.expect)(expected.length).to.equal(0);
            },
        });
        (0, chai_1.expect)(completed).to.be.true;
    });
    it('should not leak when child completes before each switch (prevent memory leaks #2355)', function () {
        var _a, _b;
        var iStream;
        var oStreamControl = new rxjs_1.Subject();
        var oStream = oStreamControl.pipe((0, operators_1.map)(function () { return (iStream = new rxjs_1.Subject()); }));
        var switcher = oStream.pipe((0, operators_1.switchAll)());
        var result = [];
        var sub = switcher.subscribe(function (x) { return result.push(x); });
        [0, 1, 2, 3, 4].forEach(function (n) {
            oStreamControl.next(n);
            iStream.complete();
        });
        (0, chai_1.expect)((_b = (_a = sub._finalizers) === null || _a === void 0 ? void 0 : _a[0]._finalizers) === null || _b === void 0 ? void 0 : _b.length).to.equal(1);
        sub.unsubscribe();
    });
    it('should not leak if we switch before child completes (prevent memory leaks #2355)', function () {
        var _a, _b, _c;
        var oStreamControl = new rxjs_1.Subject();
        var oStream = oStreamControl.pipe((0, operators_1.map)(function () { return new rxjs_1.Subject(); }));
        var switcher = oStream.pipe((0, operators_1.switchAll)());
        var result = [];
        var sub = switcher.subscribe(function (x) { return result.push(x); });
        [0, 1, 2, 3, 4].forEach(function (n) {
            oStreamControl.next(n);
        });
        (0, chai_1.expect)((_b = (_a = sub._finalizers) === null || _a === void 0 ? void 0 : _a[0]._finalizers) === null || _b === void 0 ? void 0 : _b.length).to.equal(1);
        (0, chai_1.expect)((_c = sub._finalizers) === null || _c === void 0 ? void 0 : _c.length).to.equal(2);
        sub.unsubscribe();
    });
    it('should stop listening to a synchronous observable when unsubscribed', function () {
        var sideEffects = [];
        var synchronousObservable = new rxjs_1.Observable(function (subscriber) {
            for (var i = 0; !subscriber.closed && i < 10; i++) {
                sideEffects.push(i);
                subscriber.next(i);
            }
        });
        (0, rxjs_1.of)(synchronousObservable)
            .pipe((0, operators_1.switchAll)(), (0, operators_1.take)(3))
            .subscribe(function () {
        });
        (0, chai_1.expect)(sideEffects).to.deep.equal([0, 1, 2]);
    });
});
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