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Edit File: publishReplay-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('publishReplay operator', function () {
    var testScheduler;
    beforeEach(function () {
        testScheduler = new testing_1.TestScheduler(observableMatcher_1.observableMatcher);
    });
    it('should mirror a simple source Observable', function () {
        testScheduler.run(function (_a) {
            var cold = _a.cold, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var source = cold('--1-2---3-4--5-|');
            var sourceSubs = ' ^--------------!';
            var published = source.pipe((0, operators_1.publishReplay)(1));
            var expected = '   --1-2---3-4--5-|';
            expectObservable(published).toBe(expected);
            expectSubscriptions(source.subscriptions).toBe(sourceSubs);
            published.connect();
        });
    });
    it('should return a ConnectableObservable-ish', function () {
        var source = (0, rxjs_1.of)(1).pipe((0, operators_1.publishReplay)());
        (0, chai_1.expect)(typeof source._subscribe === 'function').to.be.true;
        (0, chai_1.expect)(typeof source.getSubject === 'function').to.be.true;
        (0, chai_1.expect)(typeof source.connect === 'function').to.be.true;
        (0, chai_1.expect)(typeof source.refCount === 'function').to.be.true;
    });
    it('should do nothing if connect is not called, despite subscriptions', function () {
        testScheduler.run(function (_a) {
            var cold = _a.cold, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var source = cold('--1-2---3-4--5-|');
            var sourceSubs = [];
            var published = source.pipe((0, operators_1.publishReplay)(1));
            var expected = '   -';
            expectObservable(published).toBe(expected);
            expectSubscriptions(source.subscriptions).toBe(sourceSubs);
        });
    });
    it('should multicast the same values to multiple observers, bufferSize=1', function () {
        testScheduler.run(function (_a) {
            var cold = _a.cold, hot = _a.hot, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var source = cold('    -1-2-3----4-|');
            var sourceSubs = '     ^-----------!';
            var published = source.pipe((0, operators_1.publishReplay)(1));
            var subscriber1 = hot('a|           ').pipe((0, operators_1.mergeMapTo)(published));
            var expected1 = '      -1-2-3----4-|';
            var subscriber2 = hot('----b|       ').pipe((0, operators_1.mergeMapTo)(published));
            var expected2 = '      ----23----4-|';
            var subscriber3 = hot('--------c|   ').pipe((0, operators_1.mergeMapTo)(published));
            var expected3 = '      --------3-4-|';
            expectObservable(subscriber1).toBe(expected1);
            expectObservable(subscriber2).toBe(expected2);
            expectObservable(subscriber3).toBe(expected3);
            expectSubscriptions(source.subscriptions).toBe(sourceSubs);
            published.connect();
        });
    });
    it('should multicast the same values to multiple observers, bufferSize=2', function () {
        testScheduler.run(function (_a) {
            var cold = _a.cold, hot = _a.hot, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var source = cold('    -1-2-----3------4-|');
            var sourceSubs = '     ^-----------------!';
            var published = source.pipe((0, operators_1.publishReplay)(2));
            var subscriber1 = hot('a|                 ').pipe((0, operators_1.mergeMapTo)(published));
            var expected1 = '      -1-2-----3------4-|';
            var subscriber2 = hot('----b|             ').pipe((0, operators_1.mergeMapTo)(published));
            var expected2 = '      ----(12)-3------4-|';
            var subscriber3 = hot('-----------c|      ').pipe((0, operators_1.mergeMapTo)(published));
            var expected3 = '      -----------(23)-4-|';
            expectObservable(subscriber1).toBe(expected1);
            expectObservable(subscriber2).toBe(expected2);
            expectObservable(subscriber3).toBe(expected3);
            expectSubscriptions(source.subscriptions).toBe(sourceSubs);
            published.connect();
        });
    });
    it('should multicast an error from the source to multiple observers', function () {
        testScheduler.run(function (_a) {
            var cold = _a.cold, hot = _a.hot, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var source = cold('    -1-2-3----4-#');
            var sourceSubs = '     ^-----------!';
            var published = source.pipe((0, operators_1.publishReplay)(1));
            var subscriber1 = hot('a|           ').pipe((0, operators_1.mergeMapTo)(published));
            var expected1 = '      -1-2-3----4-#';
            var subscriber2 = hot('----b|       ').pipe((0, operators_1.mergeMapTo)(published));
            var expected2 = '      ----23----4-#';
            var subscriber3 = hot('--------c|   ').pipe((0, operators_1.mergeMapTo)(published));
            var expected3 = '      --------3-4-#';
            expectObservable(subscriber1).toBe(expected1);
            expectObservable(subscriber2).toBe(expected2);
            expectObservable(subscriber3).toBe(expected3);
            expectSubscriptions(source.subscriptions).toBe(sourceSubs);
            published.connect();
        });
    });
    it('should multicast the same values to multiple observers, but is unsubscribed explicitly and early', function () {
        testScheduler.run(function (_a) {
            var cold = _a.cold, hot = _a.hot, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var source = cold('    -1-2-3----4-|');
            var sourceSubs = '     ^--------!   ';
            var published = source.pipe((0, operators_1.publishReplay)(1));
            var unsub = '          ---------u   ';
            var subscriber1 = hot('a|           ').pipe((0, operators_1.mergeMapTo)(published));
            var expected1 = '      -1-2-3----   ';
            var subscriber2 = hot('----b|       ').pipe((0, operators_1.mergeMapTo)(published));
            var expected2 = '      ----23----   ';
            var subscriber3 = hot('--------c|   ').pipe((0, operators_1.mergeMapTo)(published));
            var expected3 = '      --------3-   ';
            expectObservable(subscriber1).toBe(expected1);
            expectObservable(subscriber2).toBe(expected2);
            expectObservable(subscriber3).toBe(expected3);
            expectSubscriptions(source.subscriptions).toBe(sourceSubs);
            var connection;
            expectObservable(hot(unsub).pipe((0, operators_1.tap)(function () {
                connection.unsubscribe();
            }))).toBe(unsub);
            connection = published.connect();
        });
    });
    it('should not break unsubscription chains when result is unsubscribed explicitly', function () {
        testScheduler.run(function (_a) {
            var cold = _a.cold, hot = _a.hot, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var source = cold('    -1-2-3----4-|');
            var sourceSubs = '     ^--------!   ';
            var published = source.pipe((0, operators_1.mergeMap)(function (x) { return (0, rxjs_1.of)(x); }), (0, operators_1.publishReplay)(1));
            var subscriber1 = hot('a|           ').pipe((0, operators_1.mergeMapTo)(published));
            var expected1 = '      -1-2-3----   ';
            var subscriber2 = hot('----b|       ').pipe((0, operators_1.mergeMapTo)(published));
            var expected2 = '      ----23----   ';
            var subscriber3 = hot('--------c|   ').pipe((0, operators_1.mergeMapTo)(published));
            var expected3 = '      --------3-   ';
            var unsub = '          ---------u   ';
            expectObservable(subscriber1).toBe(expected1);
            expectObservable(subscriber2).toBe(expected2);
            expectObservable(subscriber3).toBe(expected3);
            expectSubscriptions(source.subscriptions).toBe(sourceSubs);
            var connection;
            expectObservable(hot(unsub).pipe((0, operators_1.tap)(function () {
                connection.unsubscribe();
            }))).toBe(unsub);
            connection = published.connect();
        });
    });
    describe('with refCount()', function () {
        it('should connect when first subscriber subscribes', function () {
            testScheduler.run(function (_a) {
                var cold = _a.cold, hot = _a.hot, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
                var source = cold('       -1-2-3----4-|');
                var sourceSubs = '     ---^-----------!';
                var replayed = source.pipe((0, operators_1.publishReplay)(1), (0, operators_1.refCount)());
                var subscriber1 = hot('---a|           ').pipe((0, operators_1.mergeMapTo)(replayed));
                var expected1 = '      ----1-2-3----4-|';
                var subscriber2 = hot('-------b|       ').pipe((0, operators_1.mergeMapTo)(replayed));
                var expected2 = '      -------23----4-|';
                var subscriber3 = hot('-----------c|   ').pipe((0, operators_1.mergeMapTo)(replayed));
                var expected3 = '      -----------3-4-|';
                expectObservable(subscriber1).toBe(expected1);
                expectObservable(subscriber2).toBe(expected2);
                expectObservable(subscriber3).toBe(expected3);
                expectSubscriptions(source.subscriptions).toBe(sourceSubs);
            });
        });
        it('should disconnect when last subscriber unsubscribes', function () {
            testScheduler.run(function (_a) {
                var cold = _a.cold, hot = _a.hot, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
                var source = cold('       -1-2-3----4-|');
                var sourceSubs = '     ---^--------!   ';
                var replayed = source.pipe((0, operators_1.publishReplay)(1), (0, operators_1.refCount)());
                var subscriber1 = hot('---a|           ').pipe((0, operators_1.mergeMapTo)(replayed));
                var unsub1 = '         ----------!     ';
                var expected1 = '      ----1-2-3--     ';
                var subscriber2 = hot('-------b|       ').pipe((0, operators_1.mergeMapTo)(replayed));
                var unsub2 = '         ------------!   ';
                var expected2 = '      -------23----   ';
                expectObservable(subscriber1, unsub1).toBe(expected1);
                expectObservable(subscriber2, unsub2).toBe(expected2);
                expectSubscriptions(source.subscriptions).toBe(sourceSubs);
            });
        });
        it('should NOT be retryable', function () {
            testScheduler.run(function (_a) {
                var cold = _a.cold, hot = _a.hot, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
                var source = cold('    -1-2-3----4-#     ');
                var sourceSubs = '     ^-----------!     ';
                var published = source.pipe((0, operators_1.publishReplay)(1), (0, operators_1.refCount)(), (0, operators_1.retry)(3));
                var subscriber1 = hot('a|                ').pipe((0, operators_1.mergeMapTo)(published));
                var expected1 = '      -1-2-3----4-(444#)';
                var subscriber2 = hot('----b|            ').pipe((0, operators_1.mergeMapTo)(published));
                var expected2 = '      ----23----4-(444#)';
                var subscriber3 = hot('--------c|        ').pipe((0, operators_1.mergeMapTo)(published));
                var expected3 = '      --------3-4-(444#)';
                expectObservable(subscriber1).toBe(expected1);
                expectObservable(subscriber2).toBe(expected2);
                expectObservable(subscriber3).toBe(expected3);
                expectSubscriptions(source.subscriptions).toBe(sourceSubs);
            });
        });
        it('should NOT be repeatable', function () {
            testScheduler.run(function (_a) {
                var cold = _a.cold, hot = _a.hot, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
                var source = cold('    -1-2-3----4-|    ');
                var sourceSubs = '     ^-----------!    ';
                var published = source.pipe((0, operators_1.publishReplay)(1), (0, operators_1.refCount)(), (0, operators_1.repeat)(3));
                var subscriber1 = hot('a|               ').pipe((0, operators_1.mergeMapTo)(published));
                var expected1 = '      -1-2-3----4-(44|)';
                var subscriber2 = hot('----b|           ').pipe((0, operators_1.mergeMapTo)(published));
                var expected2 = '      ----23----4-(44|)';
                var subscriber3 = hot('--------c|       ').pipe((0, operators_1.mergeMapTo)(published));
                var expected3 = '      --------3-4-(44|)';
                expectObservable(subscriber1).toBe(expected1);
                expectObservable(subscriber2).toBe(expected2);
                expectObservable(subscriber3).toBe(expected3);
                expectSubscriptions(source.subscriptions).toBe(sourceSubs);
            });
        });
    });
    it('should multicast one observable to multiple observers', function (done) {
        var results1 = [];
        var results2 = [];
        var subscriptions = 0;
        var source = new rxjs_1.Observable(function (observer) {
            subscriptions++;
            observer.next(1);
            observer.next(2);
            observer.next(3);
            observer.next(4);
            observer.complete();
        });
        var connectable = source.pipe((0, operators_1.publishReplay)());
        connectable.subscribe(function (x) {
            results1.push(x);
        });
        connectable.subscribe(function (x) {
            results2.push(x);
        });
        (0, chai_1.expect)(results1).to.deep.equal([]);
        (0, chai_1.expect)(results2).to.deep.equal([]);
        connectable.connect();
        (0, chai_1.expect)(results1).to.deep.equal([1, 2, 3, 4]);
        (0, chai_1.expect)(results2).to.deep.equal([1, 2, 3, 4]);
        (0, chai_1.expect)(subscriptions).to.equal(1);
        done();
    });
    it('should replay as many events as specified by the bufferSize', function (done) {
        var results1 = [];
        var results2 = [];
        var subscriptions = 0;
        var source = new rxjs_1.Observable(function (observer) {
            subscriptions++;
            observer.next(1);
            observer.next(2);
            observer.next(3);
            observer.next(4);
            observer.complete();
        });
        var connectable = source.pipe((0, operators_1.publishReplay)(2));
        connectable.subscribe(function (x) {
            results1.push(x);
        });
        (0, chai_1.expect)(results1).to.deep.equal([]);
        (0, chai_1.expect)(results2).to.deep.equal([]);
        connectable.connect();
        connectable.subscribe(function (x) {
            results2.push(x);
        });
        (0, chai_1.expect)(results1).to.deep.equal([1, 2, 3, 4]);
        (0, chai_1.expect)(results2).to.deep.equal([3, 4]);
        (0, chai_1.expect)(subscriptions).to.equal(1);
        done();
    });
    it('should emit replayed values and resubscribe to the source when reconnected without source completion', function () {
        var results1 = [];
        var results2 = [];
        var subscriptions = 0;
        var source = new rxjs_1.Observable(function (observer) {
            subscriptions++;
            observer.next(1);
            observer.next(2);
            observer.next(3);
            observer.next(4);
        });
        var connectable = source.pipe((0, operators_1.publishReplay)(2));
        var subscription1 = connectable.subscribe(function (x) {
            results1.push(x);
        });
        (0, chai_1.expect)(results1).to.deep.equal([]);
        (0, chai_1.expect)(results2).to.deep.equal([]);
        connectable.connect().unsubscribe();
        subscription1.unsubscribe();
        (0, chai_1.expect)(results1).to.deep.equal([1, 2, 3, 4]);
        (0, chai_1.expect)(results2).to.deep.equal([]);
        (0, chai_1.expect)(subscriptions).to.equal(1);
        var subscription2 = connectable.subscribe(function (x) {
            results2.push(x);
        });
        connectable.connect().unsubscribe();
        subscription2.unsubscribe();
        (0, chai_1.expect)(results1).to.deep.equal([1, 2, 3, 4]);
        (0, chai_1.expect)(results2).to.deep.equal([3, 4, 1, 2, 3, 4]);
        (0, chai_1.expect)(subscriptions).to.equal(2);
    });
    it('should emit replayed values plus completed when subscribed after completed', function (done) {
        var results1 = [];
        var results2 = [];
        var subscriptions = 0;
        var source = new rxjs_1.Observable(function (observer) {
            subscriptions++;
            observer.next(1);
            observer.next(2);
            observer.next(3);
            observer.next(4);
            observer.complete();
        });
        var connectable = source.pipe((0, operators_1.publishReplay)(2));
        connectable.subscribe(function (x) {
            results1.push(x);
        });
        (0, chai_1.expect)(results1).to.deep.equal([]);
        (0, chai_1.expect)(results2).to.deep.equal([]);
        connectable.connect();
        (0, chai_1.expect)(results1).to.deep.equal([1, 2, 3, 4]);
        (0, chai_1.expect)(results2).to.deep.equal([]);
        (0, chai_1.expect)(subscriptions).to.equal(1);
        connectable.subscribe({
            next: function (x) {
                results2.push(x);
            },
            error: function (x) {
                done(new Error('should not be called'));
            },
            complete: function () {
                (0, chai_1.expect)(results2).to.deep.equal([3, 4]);
                done();
            },
        });
    });
    it('should multicast an empty source', function () {
        testScheduler.run(function (_a) {
            var cold = _a.cold, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var source = cold('|  ');
            var sourceSubs = ' (^!)';
            var published = source.pipe((0, operators_1.publishReplay)(1));
            var expected = '   |';
            expectObservable(published).toBe(expected);
            expectSubscriptions(source.subscriptions).toBe(sourceSubs);
            published.connect();
        });
    });
    it('should multicast a never source', function () {
        testScheduler.run(function (_a) {
            var cold = _a.cold, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var source = cold('-');
            var sourceSubs = ' ^';
            var published = source.pipe((0, operators_1.publishReplay)(1));
            var expected = '   -';
            expectObservable(published).toBe(expected);
            expectSubscriptions(source.subscriptions).toBe(sourceSubs);
            published.connect();
        });
    });
    it('should multicast a throw source', function () {
        testScheduler.run(function (_a) {
            var cold = _a.cold, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var source = cold('#   ');
            var sourceSubs = ' (^!)';
            var published = source.pipe((0, operators_1.publishReplay)(1));
            var expected = '   #   ';
            expectObservable(published).toBe(expected);
            expectSubscriptions(source.subscriptions).toBe(sourceSubs);
            published.connect();
        });
    });
    it('should mirror a simple source Observable with selector', function () {
        testScheduler.run(function (_a) {
            var cold = _a.cold, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var values = { a: 2, b: 4, c: 6, d: 8 };
            var selector = function (observable) { return observable.pipe((0, operators_1.map)(function (v) { return 2 * +v; })); };
            var source = cold('--1-2---3-4---|');
            var sourceSubs = ' ^-------------!';
            var published = source.pipe((0, operators_1.publishReplay)(1, Infinity, selector));
            var expected = '   --a-b---c-d---|';
            expectObservable(published).toBe(expected, values);
            expectSubscriptions(source.subscriptions).toBe(sourceSubs);
        });
    });
    it('should EMIT an error when the selector throws an exception', function () {
        testScheduler.run(function (_a) {
            var cold = _a.cold, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var error = "It's broken";
            var selector = function () {
                throw error;
            };
            var source = cold('--1-2---3-4---|');
            var published = source.pipe((0, operators_1.publishReplay)(1, Infinity, selector));
            var expected = '   #              ';
            expectObservable(published).toBe(expected, undefined, "It's broken");
        });
    });
    it('should emit an error when the selector returns an Observable that emits an error', function () {
        testScheduler.run(function (_a) {
            var cold = _a.cold, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var error = "It's broken";
            var innerObservable = cold('--5-6----#', undefined, error);
            var selector = function (observable) { return observable.pipe((0, operators_1.mergeMapTo)(innerObservable)); };
            var source = cold('--1--2---3---|');
            var sourceSubs = ' ^----------!  ';
            var published = source.pipe((0, operators_1.publishReplay)(1, Infinity, selector));
            var expected = '   ----5-65-6-#  ';
            expectObservable(published).toBe(expected, undefined, error);
            expectSubscriptions(source.subscriptions).toBe(sourceSubs);
        });
    });
    it('should terminate immediately when the selector returns an empty Observable', function () {
        testScheduler.run(function (_a) {
            var cold = _a.cold, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var selector = function () { return rxjs_1.EMPTY; };
            var source = cold('--1--2---3---|');
            var sourceSubs = ' (^!)          ';
            var published = source.pipe((0, operators_1.publishReplay)(1, Infinity, selector));
            var expected = '   |             ';
            expectObservable(published).toBe(expected);
            expectSubscriptions(source.subscriptions).toBe(sourceSubs);
        });
    });
    it('should not emit and should not complete/error when the selector returns never', function () {
        testScheduler.run(function (_a) {
            var cold = _a.cold, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var selector = function () { return rxjs_1.NEVER; };
            var source = cold('-');
            var sourceSubs = ' ^';
            var published = source.pipe((0, operators_1.publishReplay)(1, Infinity, selector));
            var expected = '   -';
            expectObservable(published).toBe(expected);
            expectSubscriptions(source.subscriptions).toBe(sourceSubs);
        });
    });
    it('should emit error when the selector returns Observable.throw', function () {
        testScheduler.run(function (_a) {
            var cold = _a.cold, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var error = "It's broken";
            var selector = function () { return (0, rxjs_1.throwError)(function () { return error; }); };
            var source = cold('--1--2---3---|');
            var sourceSubs = ' (^!)          ';
            var published = source.pipe((0, operators_1.publishReplay)(1, Infinity, selector));
            var expected = '   #             ';
            expectObservable(published).toBe(expected, undefined, error);
            expectSubscriptions(source.subscriptions).toBe(sourceSubs);
        });
    });
    it('should be referentially-transparent', function () {
        testScheduler.run(function (_a) {
            var cold = _a.cold, hot = _a.hot, expectObservable = _a.expectObservable, expectSubscriptions = _a.expectSubscriptions;
            var source1 = cold('-1-2-3-4-5-|');
            var source1Subs = ' ^----------!';
            var expected1 = '   -1-2-3-4-5-|';
            var source2 = cold('-6-7-8-9-0-|');
            var source2Subs = ' ^----------!';
            var expected2 = '   -6-7-8-9-0-|';
            var partialPipeLine = (0, rxjs_1.pipe)((0, operators_1.publishReplay)(1));
            var published1 = source1.pipe(partialPipeLine);
            var published2 = source2.pipe(partialPipeLine);
            expectObservable(published1).toBe(expected1);
            expectSubscriptions(source1.subscriptions).toBe(source1Subs);
            expectObservable(published2).toBe(expected2);
            expectSubscriptions(source2.subscriptions).toBe(source2Subs);
            published1.connect();
            published2.connect();
        });
    });
});
//# sourceMappingURL=publishReplay-spec.js.map

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• …………
Jede*r ist willkommen, sich mit seinen und ihren Fragen und Erfahrungen einzubringen.
Grundidee: wir sind alle in bestimmten Lebensbereichen „Expert*innen“ und können so andere mit unserem Wissen bereichern und bei der Umsetzung im Alltag unterstützen.