@reactivex/rxjs
Version:
Reactive Extensions for modern JavaScript
274 lines • 12.7 kB
JavaScript
"use strict";
var chai_1 = require('chai');
var Rx = require('../../dist/cjs/Rx');
var Observable = Rx.Observable;
/** @test {publish} */
describe('Observable.prototype.publish', function () {
asDiagram('publish')('should mirror a simple source Observable', function () {
var source = cold('--1-2---3-4--5-|');
var sourceSubs = '^ !';
var published = source.publish();
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).publish();
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.publish();
var expected = '-';
expectObservable(published).toBe(expected);
expectSubscriptions(source.subscriptions).toBe(sourceSubs);
});
it('should multicast the same values to multiple observers', function () {
var source = cold('-1-2-3----4-|');
var sourceSubs = '^ !';
var published = source.publish();
var subscriber1 = hot('a| ').mergeMapTo(published);
var expected1 = '-1-2-3----4-|';
var subscriber2 = hot(' b| ').mergeMapTo(published);
var expected2 = ' -3----4-|';
var subscriber3 = hot(' c| ').mergeMapTo(published);
var expected3 = ' --4-|';
expectObservable(subscriber1).toBe(expected1);
expectObservable(subscriber2).toBe(expected2);
expectObservable(subscriber3).toBe(expected3);
expectSubscriptions(source.subscriptions).toBe(sourceSubs);
published.connect();
});
it('should accept selectors', function () {
var source = hot('-1-2-3----4-|');
var sourceSubs = ['^ !',
' ^ !',
' ^ !'];
var published = source.publish(function (x) { return x.zip(x, function (a, b) { return (parseInt(a) + parseInt(b)).toString(); }); });
var subscriber1 = hot('a| ').mergeMapTo(published);
var expected1 = '-2-4-6----8-|';
var subscriber2 = hot(' b| ').mergeMapTo(published);
var expected2 = ' -6----8-|';
var subscriber3 = hot(' c| ').mergeMapTo(published);
var expected3 = ' --8-|';
expectObservable(subscriber1).toBe(expected1);
expectObservable(subscriber2).toBe(expected2);
expectObservable(subscriber3).toBe(expected3);
expectSubscriptions(source.subscriptions).toBe(sourceSubs);
});
it('should multicast an error from the source to multiple observers', function () {
var source = cold('-1-2-3----4-#');
var sourceSubs = '^ !';
var published = source.publish();
var subscriber1 = hot('a| ').mergeMapTo(published);
var expected1 = '-1-2-3----4-#';
var subscriber2 = hot(' b| ').mergeMapTo(published);
var expected2 = ' -3----4-#';
var subscriber3 = hot(' c| ').mergeMapTo(published);
var expected3 = ' --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.publish();
var unsub = ' u ';
var subscriber1 = hot('a| ').mergeMapTo(published);
var expected1 = '-1-2-3---- ';
var subscriber2 = hot(' b| ').mergeMapTo(published);
var expected2 = ' -3---- ';
var subscriber3 = hot(' c| ').mergeMapTo(published);
var expected3 = ' -- ';
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); })
.publish();
var subscriber1 = hot('a| ').mergeMapTo(published);
var expected1 = '-1-2-3---- ';
var subscriber2 = hot(' b| ').mergeMapTo(published);
var expected2 = ' -3---- ';
var subscriber3 = hot(' c| ').mergeMapTo(published);
var expected3 = ' -- ';
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.publish().refCount();
var subscriber1 = hot(' a| ').mergeMapTo(replayed);
var expected1 = ' -1-2-3----4-|';
var subscriber2 = hot(' b| ').mergeMapTo(replayed);
var expected2 = ' -3----4-|';
var subscriber3 = hot(' c| ').mergeMapTo(replayed);
var expected3 = ' --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.publish().refCount();
var subscriber1 = hot(' a| ').mergeMapTo(replayed);
var unsub1 = ' ! ';
var expected1 = ' -1-2-3-- ';
var subscriber2 = hot(' b| ').mergeMapTo(replayed);
var unsub2 = ' ! ';
var expected2 = ' -3---- ';
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-#');
var sourceSubs = '^ !';
var published = source.publish().refCount().retry(3);
var subscriber1 = hot('a| ').mergeMapTo(published);
var expected1 = '-1-2-3----4-#';
var subscriber2 = hot(' b| ').mergeMapTo(published);
var expected2 = ' -3----4-#';
var subscriber3 = hot(' c| ').mergeMapTo(published);
var expected3 = ' --4-#';
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-|');
var sourceSubs = '^ !';
var published = source.publish().refCount().repeat(3);
var subscriber1 = hot('a| ').mergeMapTo(published);
var expected1 = '-1-2-3----4-|';
var subscriber2 = hot(' b| ').mergeMapTo(published);
var expected2 = ' -3----4-|';
var subscriber3 = hot(' c| ').mergeMapTo(published);
var expected3 = ' --4-|';
expectObservable(subscriber1).toBe(expected1);
expectObservable(subscriber2).toBe(expected2);
expectObservable(subscriber3).toBe(expected3);
expectSubscriptions(source.subscriptions).toBe(sourceSubs);
});
});
it('should emit 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.publish();
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([]);
done();
});
});
it('should multicast an empty source', function () {
var source = cold('|');
var sourceSubs = '(^!)';
var published = source.publish();
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.publish();
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.publish();
var expected = '#';
expectObservable(published).toBe(expected);
expectSubscriptions(source.subscriptions).toBe(sourceSubs);
published.connect();
});
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.publish();
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();
});
});
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