spec-js/operators/publishReplay-spec.js
"use strict";
var chai_1 = require('chai');
var Rx = require('../../dist/package/Rx');
var Observable = Rx.Observable;
/** @test {publishReplay} */
describe('Observable.prototype.publishReplay', function () {
asDiagram('publishReplay(1)')('should mirror a simple source Observable', function () {
var source = cold('--1-2---3-4--5-|');
var sourceSubs = '^ !';
var published = source.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 = Observable.of(1).publishReplay();
chai_1.expect(typeof source._subscribe === 'function').to.be.true;
chai_1.expect(typeof source.getSubject === 'function').to.be.true;
chai_1.expect(typeof source.connect === 'function').to.be.true;
chai_1.expect(typeof source.refCount === 'function').to.be.true;
});
it('should do nothing if connect is not called, despite subscriptions', function () {
var source = cold('--1-2---3-4--5-|');
var sourceSubs = [];
var published = source.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 () {
var source = cold('-1-2-3----4-|');
var sourceSubs = '^ !';
var published = source.publishReplay(1);
var subscriber1 = hot('a| ').mergeMapTo(published);
var expected1 = '-1-2-3----4-|';
var subscriber2 = hot(' b| ').mergeMapTo(published);
var expected2 = ' 23----4-|';
var subscriber3 = hot(' c| ').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 () {
var source = cold('-1-2-----3------4-|');
var sourceSubs = '^ !';
var published = source.publishReplay(2);
var subscriber1 = hot('a| ').mergeMapTo(published);
var expected1 = '-1-2-----3------4-|';
var subscriber2 = hot(' b| ').mergeMapTo(published);
var expected2 = ' (12)-3------4-|';
var subscriber3 = hot(' c| ').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 () {
var source = cold('-1-2-3----4-#');
var sourceSubs = '^ !';
var published = source.publishReplay(1);
var subscriber1 = hot('a| ').mergeMapTo(published);
var expected1 = '-1-2-3----4-#';
var subscriber2 = hot(' b| ').mergeMapTo(published);
var expected2 = ' 23----4-#';
var subscriber3 = hot(' c| ').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 () {
var source = cold('-1-2-3----4-|');
var sourceSubs = '^ ! ';
var published = source.publishReplay(1);
var unsub = ' u ';
var subscriber1 = hot('a| ').mergeMapTo(published);
var expected1 = '-1-2-3---- ';
var subscriber2 = hot(' b| ').mergeMapTo(published);
var expected2 = ' 23---- ';
var subscriber3 = hot(' c| ').mergeMapTo(published);
var expected3 = ' 3- ';
expectObservable(subscriber1).toBe(expected1);
expectObservable(subscriber2).toBe(expected2);
expectObservable(subscriber3).toBe(expected3);
expectSubscriptions(source.subscriptions).toBe(sourceSubs);
// Set up unsubscription action
var connection;
expectObservable(hot(unsub).do(function () {
connection.unsubscribe();
})).toBe(unsub);
connection = published.connect();
});
it('should not break unsubscription chains when result is unsubscribed explicitly', function () {
var source = cold('-1-2-3----4-|');
var sourceSubs = '^ ! ';
var published = source
.mergeMap(function (x) { return Observable.of(x); })
.publishReplay(1);
var subscriber1 = hot('a| ').mergeMapTo(published);
var expected1 = '-1-2-3---- ';
var subscriber2 = hot(' b| ').mergeMapTo(published);
var expected2 = ' 23---- ';
var subscriber3 = hot(' c| ').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);
// Set up unsubscription action
var connection;
expectObservable(hot(unsub).do(function () {
connection.unsubscribe();
})).toBe(unsub);
connection = published.connect();
});
describe('with refCount()', function () {
it('should connect when first subscriber subscribes', function () {
var source = cold('-1-2-3----4-|');
var sourceSubs = ' ^ !';
var replayed = source.publishReplay(1).refCount();
var subscriber1 = hot(' a| ').mergeMapTo(replayed);
var expected1 = ' -1-2-3----4-|';
var subscriber2 = hot(' b| ').mergeMapTo(replayed);
var expected2 = ' 23----4-|';
var subscriber3 = hot(' c| ').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 () {
var source = cold('-1-2-3----4-|');
var sourceSubs = ' ^ ! ';
var replayed = source.publishReplay(1).refCount();
var subscriber1 = hot(' a| ').mergeMapTo(replayed);
var unsub1 = ' ! ';
var expected1 = ' -1-2-3-- ';
var subscriber2 = hot(' b| ').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 () {
var source = cold('-1-2-3----4-#');
// const sourceSubs = '^ !';
var published = source.publishReplay(1).refCount().retry(3);
var subscriber1 = hot('a| ').mergeMapTo(published);
var expected1 = '-1-2-3----4-(444#)';
var subscriber2 = hot(' b| ').mergeMapTo(published);
var expected2 = ' 23----4-(444#)';
var subscriber3 = hot(' c| ').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 () {
var source = cold('-1-2-3----4-|');
// const sourceSubs = '^ !';
var published = source.publishReplay(1).refCount().repeat(3);
var subscriber1 = hot('a| ').mergeMapTo(published);
var expected1 = '-1-2-3----4-(44|)';
var subscriber2 = hot(' b| ').mergeMapTo(published);
var expected2 = ' 23----4-(44|)';
var subscriber3 = hot(' c| ').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 Observable(function (observer) {
subscriptions++;
observer.next(1);
observer.next(2);
observer.next(3);
observer.next(4);
observer.complete();
});
var connectable = source.publishReplay();
connectable.subscribe(function (x) {
results1.push(x);
});
connectable.subscribe(function (x) {
results2.push(x);
});
chai_1.expect(results1).to.deep.equal([]);
chai_1.expect(results2).to.deep.equal([]);
connectable.connect();
chai_1.expect(results1).to.deep.equal([1, 2, 3, 4]);
chai_1.expect(results2).to.deep.equal([1, 2, 3, 4]);
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 Observable(function (observer) {
subscriptions++;
observer.next(1);
observer.next(2);
observer.next(3);
observer.next(4);
observer.complete();
});
var connectable = source.publishReplay(2);
connectable.subscribe(function (x) {
results1.push(x);
});
chai_1.expect(results1).to.deep.equal([]);
chai_1.expect(results2).to.deep.equal([]);
connectable.connect();
connectable.subscribe(function (x) {
results2.push(x);
});
chai_1.expect(results1).to.deep.equal([1, 2, 3, 4]);
chai_1.expect(results2).to.deep.equal([3, 4]);
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 Observable(function (observer) {
subscriptions++;
observer.next(1);
observer.next(2);
observer.next(3);
observer.next(4);
// observer.complete();
});
var connectable = source.publishReplay(2);
var subscription1 = connectable.subscribe(function (x) {
results1.push(x);
});
chai_1.expect(results1).to.deep.equal([]);
chai_1.expect(results2).to.deep.equal([]);
connectable.connect().unsubscribe();
subscription1.unsubscribe();
chai_1.expect(results1).to.deep.equal([1, 2, 3, 4]);
chai_1.expect(results2).to.deep.equal([]);
chai_1.expect(subscriptions).to.equal(1);
var subscription2 = connectable.subscribe(function (x) {
results2.push(x);
});
connectable.connect().unsubscribe();
subscription2.unsubscribe();
chai_1.expect(results1).to.deep.equal([1, 2, 3, 4]);
chai_1.expect(results2).to.deep.equal([3, 4, 1, 2, 3, 4]);
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 Observable(function (observer) {
subscriptions++;
observer.next(1);
observer.next(2);
observer.next(3);
observer.next(4);
observer.complete();
});
var connectable = source.publishReplay(2);
connectable.subscribe(function (x) {
results1.push(x);
});
chai_1.expect(results1).to.deep.equal([]);
chai_1.expect(results2).to.deep.equal([]);
connectable.connect();
chai_1.expect(results1).to.deep.equal([1, 2, 3, 4]);
chai_1.expect(results2).to.deep.equal([]);
chai_1.expect(subscriptions).to.equal(1);
connectable.subscribe(function (x) {
results2.push(x);
}, function (x) {
done(new Error('should not be called'));
}, function () {
chai_1.expect(results2).to.deep.equal([3, 4]);
done();
});
});
it('should multicast an empty source', function () {
var source = cold('|');
var sourceSubs = '(^!)';
var published = source.publishReplay(1);
var expected = '|';
expectObservable(published).toBe(expected);
expectSubscriptions(source.subscriptions).toBe(sourceSubs);
published.connect();
});
it('should multicast a never source', function () {
var source = cold('-');
var sourceSubs = '^';
var published = source.publishReplay(1);
var expected = '-';
expectObservable(published).toBe(expected);
expectSubscriptions(source.subscriptions).toBe(sourceSubs);
published.connect();
});
it('should multicast a throw source', function () {
var source = cold('#');
var sourceSubs = '(^!)';
var published = source.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 () {
var values = { a: 2, b: 4, c: 6, d: 8 };
var selector = function (observable) { return observable.map(function (v) { return 2 * v; }); };
var source = cold('--1-2---3-4---|');
var sourceSubs = '^ !';
var published = source.publishReplay(1, Number.POSITIVE_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 () {
var error = "It's broken";
var selector = function () {
throw error;
};
var source = cold('--1-2---3-4---|');
var published = source.publishReplay(1, Number.POSITIVE_INFINITY, selector);
// The exception is thrown outside Rx chain (not as an error notification).
chai_1.expect(function () { return published.subscribe(); }).to.throw(error);
});
it('should emit an error when the selector returns an Observable that emits an error', function () {
var error = "It's broken";
var innerObservable = cold('--5-6----#', undefined, error);
var selector = function (observable) { return observable.mergeMapTo(innerObservable); };
var source = cold('--1--2---3---|');
var sourceSubs = '^ !';
var published = source.publishReplay(1, Number.POSITIVE_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 () {
var selector = function () { return Observable.empty(); };
var source = cold('--1--2---3---|');
var sourceSubs = '(^!)';
var published = source.publishReplay(1, Number.POSITIVE_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 () {
var selector = function () { return Observable.never(); };
var source = cold('-');
var sourceSubs = '^';
var published = source.publishReplay(1, Number.POSITIVE_INFINITY, selector);
var expected = '-';
expectObservable(published).toBe(expected);
expectSubscriptions(source.subscriptions).toBe(sourceSubs);
});
it('should emit error when the selector returns Observable.throw', function () {
var error = "It's broken";
var selector = function () { return Observable.throw(error); };
var source = cold('--1--2---3---|');
var sourceSubs = '(^!)';
var published = source.publishReplay(1, Number.POSITIVE_INFINITY, selector);
var expected = '#';
expectObservable(published).toBe(expected, undefined, error);
expectSubscriptions(source.subscriptions).toBe(sourceSubs);
});
type('should infer the type', function () {
/* tslint:disable:no-unused-variable */
var source = Rx.Observable.of(1, 2, 3);
var result = source.publishReplay(1);
/* tslint:enable:no-unused-variable */
});
type('should infer the type with a selector', function () {
/* tslint:disable:no-unused-variable */
var source = Rx.Observable.of(1, 2, 3);
var result = source.publishReplay(1, undefined, function (s) { return s.map(function (x) { return x; }); });
/* tslint:enable:no-unused-variable */
});
type('should infer the type with a type-changing selector', function () {
/* tslint:disable:no-unused-variable */
var source = Rx.Observable.of(1, 2, 3);
var result = source.publishReplay(1, undefined, function (s) { return s.map(function (x) { return x + '!'; }); });
/* tslint:enable:no-unused-variable */
});
type('should infer the type for the pipeable operator', function () {
/* tslint:disable:no-unused-variable */
var source = Rx.Observable.of(1, 2, 3);
// TODO: https://github.com/ReactiveX/rxjs/issues/2972
var result = Rx.operators.publishReplay(1)(source);
/* tslint:enable:no-unused-variable */
});
type('should infer the type for the pipeable operator with a selector', function () {
/* tslint:disable:no-unused-variable */
var source = Rx.Observable.of(1, 2, 3);
var result = source.pipe(Rx.operators.publishReplay(1, undefined, function (s) { return s.map(function (x) { return x; }); }));
/* tslint:enable:no-unused-variable */
});
type('should infer the type for the pipeable operator with a type-changing selector', function () {
/* tslint:disable:no-unused-variable */
var source = Rx.Observable.of(1, 2, 3);
var result = source.pipe(Rx.operators.publishReplay(1, undefined, function (s) { return s.map(function (x) { return x + '!'; }); }));
/* tslint:enable:no-unused-variable */
});
});
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