spec-js/operators/share-spec.js
"use strict";
var chai_1 = require('chai');
var Rx = require('../../dist/cjs/Rx');
var Observable = Rx.Observable;
/** @test {share} */
describe('Observable.prototype.share', function () {
asDiagram('share')('should mirror a simple source Observable', function () {
var source = cold('--1-2---3-4--5-|');
var sourceSubs = '^ !';
var expected = '--1-2---3-4--5-|';
var shared = source.share();
expectObservable(shared).toBe(expected);
expectSubscriptions(source.subscriptions).toBe(sourceSubs);
});
it('should share a single subscription', function () {
var subscriptionCount = 0;
var obs = new Observable(function (observer) {
subscriptionCount++;
});
var source = obs.share();
chai_1.expect(subscriptionCount).to.equal(0);
source.subscribe();
source.subscribe();
chai_1.expect(subscriptionCount).to.equal(1);
});
it('should not change the output of the observable when error', function () {
var e1 = hot('---a--^--b--c--d--e--#');
var e1subs = '^ !';
var expected = '---b--c--d--e--#';
expectObservable(e1.share()).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('should not change the output of the observable when successful with cold observable', function () {
var e1 = cold('---a--b--c--d--e--|');
var e1subs = '^ !';
var expected = '---a--b--c--d--e--|';
expectObservable(e1.share()).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('should not change the output of the observable when error with cold observable', function () {
var e1 = cold('---a--b--c--d--e--#');
var e1subs = '^ !';
var expected = '---a--b--c--d--e--#';
expectObservable(e1.share()).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('should retry just fine', function () {
var e1 = cold('---a--b--c--d--e--#');
var e1subs = ['^ ! ',
' ^ !'];
var expected = '---a--b--c--d--e-----a--b--c--d--e--#';
expectObservable(e1.share().retry(1)).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('should share the same values to multiple observers', function () {
var source = cold('-1-2-3----4-|');
var sourceSubs = '^ !';
var shared = source.share();
var subscriber1 = hot('a| ').mergeMapTo(shared);
var expected1 = '-1-2-3----4-|';
var subscriber2 = hot(' b| ').mergeMapTo(shared);
var expected2 = ' -3----4-|';
var subscriber3 = hot(' c| ').mergeMapTo(shared);
var expected3 = ' --4-|';
expectObservable(subscriber1).toBe(expected1);
expectObservable(subscriber2).toBe(expected2);
expectObservable(subscriber3).toBe(expected3);
expectSubscriptions(source.subscriptions).toBe(sourceSubs);
});
it('should share an error from the source to multiple observers', function () {
var source = cold('-1-2-3----4-#');
var sourceSubs = '^ !';
var shared = source.share();
var subscriber1 = hot('a| ').mergeMapTo(shared);
var expected1 = '-1-2-3----4-#';
var subscriber2 = hot(' b| ').mergeMapTo(shared);
var expected2 = ' -3----4-#';
var subscriber3 = hot(' c| ').mergeMapTo(shared);
var expected3 = ' --4-#';
expectObservable(subscriber1).toBe(expected1);
expectObservable(subscriber2).toBe(expected2);
expectObservable(subscriber3).toBe(expected3);
expectSubscriptions(source.subscriptions).toBe(sourceSubs);
});
it('should share the same values to multiple observers, ' +
'but is unsubscribed explicitly and early', function () {
var source = cold('-1-2-3----4-|');
var sourceSubs = '^ ! ';
var shared = source.share();
var unsub = ' ! ';
var subscriber1 = hot('a| ').mergeMapTo(shared);
var expected1 = '-1-2-3---- ';
var subscriber2 = hot(' b| ').mergeMapTo(shared);
var expected2 = ' -3---- ';
var subscriber3 = hot(' c| ').mergeMapTo(shared);
var expected3 = ' -- ';
expectObservable(subscriber1, unsub).toBe(expected1);
expectObservable(subscriber2, unsub).toBe(expected2);
expectObservable(subscriber3, unsub).toBe(expected3);
expectSubscriptions(source.subscriptions).toBe(sourceSubs);
});
it('should share an empty source', function () {
var source = cold('|');
var sourceSubs = '(^!)';
var shared = source.share();
var expected = '|';
expectObservable(shared).toBe(expected);
expectSubscriptions(source.subscriptions).toBe(sourceSubs);
});
it('should share a never source', function () {
var source = cold('-');
var sourceSubs = '^';
var shared = source.share();
var expected = '-';
expectObservable(shared).toBe(expected);
expectSubscriptions(source.subscriptions).toBe(sourceSubs);
});
it('should share a throw source', function () {
var source = cold('#');
var sourceSubs = '(^!)';
var shared = source.share();
var expected = '#';
expectObservable(shared).toBe(expected);
expectSubscriptions(source.subscriptions).toBe(sourceSubs);
});
it('should connect when first subscriber subscribes', function () {
var source = cold('-1-2-3----4-|');
var sourceSubs = ' ^ !';
var shared = source.share();
var subscriber1 = hot(' a| ').mergeMapTo(shared);
var expected1 = ' -1-2-3----4-|';
var subscriber2 = hot(' b| ').mergeMapTo(shared);
var expected2 = ' -3----4-|';
var subscriber3 = hot(' c| ').mergeMapTo(shared);
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 shared = source.share();
var subscriber1 = hot(' a| ').mergeMapTo(shared);
var unsub1 = ' ! ';
var expected1 = ' -1-2-3-- ';
var subscriber2 = hot(' b| ').mergeMapTo(shared);
var unsub2 = ' ! ';
var expected2 = ' -3---- ';
expectObservable(subscriber1, unsub1).toBe(expected1);
expectObservable(subscriber2, unsub2).toBe(expected2);
expectSubscriptions(source.subscriptions).toBe(sourceSubs);
});
it('should not break unsubscription chain when last subscriber unsubscribes', function () {
var source = cold('-1-2-3----4-|');
var sourceSubs = ' ^ ! ';
var shared = source
.mergeMap(function (x) { return Observable.of(x); })
.share()
.mergeMap(function (x) { return Observable.of(x); });
var subscriber1 = hot(' a| ').mergeMapTo(shared);
var unsub1 = ' ! ';
var expected1 = ' -1-2-3-- ';
var subscriber2 = hot(' b| ').mergeMapTo(shared);
var unsub2 = ' ! ';
var expected2 = ' -3---- ';
expectObservable(subscriber1, unsub1).toBe(expected1);
expectObservable(subscriber2, unsub2).toBe(expected2);
expectSubscriptions(source.subscriptions).toBe(sourceSubs);
});
it('should be retryable when cold source is synchronous', function () {
var source = cold('(123#)');
var shared = source.share();
var subscribe1 = 's ';
var expected1 = '(123123#) ';
var subscribe2 = ' s ';
var expected2 = ' (123123#)';
var sourceSubs = ['(^!)',
'(^!)',
' (^!)',
' (^!)'];
expectObservable(hot(subscribe1).do(function () {
expectObservable(shared.retry(1)).toBe(expected1);
})).toBe(subscribe1);
expectObservable(hot(subscribe2).do(function () {
expectObservable(shared.retry(1)).toBe(expected2);
})).toBe(subscribe2);
expectSubscriptions(source.subscriptions).toBe(sourceSubs);
});
it('should be repeatable when cold source is synchronous', function () {
var source = cold('(123|)');
var shared = source.share();
var subscribe1 = 's ';
var expected1 = '(123123|) ';
var subscribe2 = ' s ';
var expected2 = ' (123123|)';
var sourceSubs = ['(^!)',
'(^!)',
' (^!)',
' (^!)'];
expectObservable(hot(subscribe1).do(function () {
expectObservable(shared.repeat(2)).toBe(expected1);
})).toBe(subscribe1);
expectObservable(hot(subscribe2).do(function () {
expectObservable(shared.repeat(2)).toBe(expected2);
})).toBe(subscribe2);
expectSubscriptions(source.subscriptions).toBe(sourceSubs);
});
it('should be retryable', function () {
var source = cold('-1-2-3----4-# ');
var sourceSubs = ['^ ! ',
' ^ ! ',
' ^ !'];
var shared = source.share();
var subscribe1 = 's ';
var expected1 = '-1-2-3----4--1-2-3----4--1-2-3----4-#';
var subscribe2 = ' s ';
var expected2 = ' -3----4--1-2-3----4--1-2-3----4-#';
expectObservable(hot(subscribe1).do(function () {
expectObservable(shared.retry(2)).toBe(expected1);
})).toBe(subscribe1);
expectObservable(hot(subscribe2).do(function () {
expectObservable(shared.retry(2)).toBe(expected2);
})).toBe(subscribe2);
expectSubscriptions(source.subscriptions).toBe(sourceSubs);
});
it('should be repeatable', function () {
var source = cold('-1-2-3----4-| ');
var sourceSubs = ['^ ! ',
' ^ ! ',
' ^ !'];
var shared = source.share();
var subscribe1 = 's ';
var expected1 = '-1-2-3----4--1-2-3----4--1-2-3----4-|';
var subscribe2 = ' s ';
var expected2 = ' -3----4--1-2-3----4--1-2-3----4-|';
expectObservable(hot(subscribe1).do(function () {
expectObservable(shared.repeat(3)).toBe(expected1);
})).toBe(subscribe1);
expectObservable(hot(subscribe2).do(function () {
expectObservable(shared.repeat(3)).toBe(expected2);
})).toBe(subscribe2);
expectSubscriptions(source.subscriptions).toBe(sourceSubs);
});
it('should not change the output of the observable when never', function () {
var e1 = Observable.never();
var expected = '-';
expectObservable(e1.share()).toBe(expected);
});
it('should not change the output of the observable when empty', function () {
var e1 = Observable.empty();
var expected = '|';
expectObservable(e1.share()).toBe(expected);
});
});
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