spec-js/operators/repeat-spec.js
"use strict";
var chai_1 = require('chai');
var Rx = require('../../dist/cjs/Rx');
var Observable = Rx.Observable;
/** @test {repeat} */
describe('Observable.prototype.repeat', function () {
asDiagram('repeat(3)')('should resubscribe count number of times', function () {
var e1 = cold('--a--b--| ');
var subs = ['^ ! ',
' ^ ! ',
' ^ !'];
var expected = '--a--b----a--b----a--b--|';
expectObservable(e1.repeat(3)).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(subs);
});
it('should resubscribe multiple times', function () {
var e1 = cold('--a--b--| ');
var subs = ['^ ! ',
' ^ ! ',
' ^ ! ',
' ^ !'];
var expected = '--a--b----a--b----a--b----a--b--|';
expectObservable(e1.repeat(2).repeat(2)).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(subs);
});
it('should complete without emit when count is zero', function () {
var e1 = cold('--a--b--|');
var subs = [];
var expected = '|';
expectObservable(e1.repeat(0)).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(subs);
});
it('should emit source once when count is one', function () {
var e1 = cold('--a--b--|');
var subs = '^ !';
var expected = '--a--b--|';
expectObservable(e1.repeat(1)).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(subs);
});
it('should repeat until gets unsubscribed', function () {
var e1 = cold('--a--b--| ');
var subs = ['^ ! ',
' ^ !'];
var unsub = ' !';
var expected = '--a--b----a--b-';
expectObservable(e1.repeat(10), unsub).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(subs);
});
it('should be able to repeat indefinitely until unsubscribed', function () {
var e1 = cold('--a--b--| ');
var subs = ['^ ! ',
' ^ ! ',
' ^ ! ',
' ^ ! ',
' ^ ! ',
' ^ !'];
var unsub = ' !';
var expected = '--a--b----a--b----a--b----a--b----a--b----a--';
expectObservable(e1.repeat(), unsub).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(subs);
});
it('should not break unsubscription chain when unsubscribed explicitly', function () {
var e1 = cold('--a--b--| ');
var subs = ['^ ! ',
' ^ ! ',
' ^ ! ',
' ^ ! ',
' ^ ! ',
' ^ !'];
var unsub = ' !';
var expected = '--a--b----a--b----a--b----a--b----a--b----a--';
var result = e1
.mergeMap(function (x) { return Observable.of(x); })
.repeat()
.mergeMap(function (x) { return Observable.of(x); });
expectObservable(result, unsub).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(subs);
});
it('should consider negative count as repeat indefinitely', function () {
var e1 = cold('--a--b--| ');
var subs = ['^ ! ',
' ^ ! ',
' ^ ! ',
' ^ ! ',
' ^ ! ',
' ^ !'];
var unsub = ' !';
var expected = '--a--b----a--b----a--b----a--b----a--b----a--';
expectObservable(e1.repeat(-1), unsub).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(subs);
});
it('should not complete when source never completes', function () {
var e1 = cold('-');
var e1subs = '^';
var expected = '-';
expectObservable(e1.repeat(3)).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('should not complete when source does not completes', function () {
var e1 = cold('-');
var unsub = ' !';
var subs = '^ !';
var expected = '-';
expectObservable(e1.repeat(3), unsub).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(subs);
});
it('should complete immediately when source does not complete without emit but count is zero', function () {
var e1 = cold('-');
var subs = [];
var expected = '|';
expectObservable(e1.repeat(0)).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(subs);
});
it('should complete immediately when source does not complete but count is zero', function () {
var e1 = cold('--a--b--');
var subs = [];
var expected = '|';
expectObservable(e1.repeat(0)).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(subs);
});
it('should emit source once and does not complete when source emits but does not complete', function () {
var e1 = cold('--a--b--');
var subs = ['^ '];
var expected = '--a--b--';
expectObservable(e1.repeat(3)).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(subs);
});
it('should complete when source is empty', function () {
var e1 = cold('|');
var e1subs = ['(^!)', '(^!)', '(^!)'];
var expected = '|';
expectObservable(e1.repeat(3)).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('should complete when source does not emit', function () {
var e1 = cold('----| ');
var subs = ['^ ! ',
' ^ ! ',
' ^ !'];
var expected = '------------|';
expectObservable(e1.repeat(3)).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(subs);
});
it('should complete immediately when source does not emit but count is zero', function () {
var e1 = cold('----|');
var subs = [];
var expected = '|';
expectObservable(e1.repeat(0)).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(subs);
});
it('should raise error when source raises error', function () {
var e1 = cold('--a--b--#');
var subs = '^ !';
var expected = '--a--b--#';
expectObservable(e1.repeat(2)).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(subs);
});
it('should raises error if source throws', function () {
var e1 = cold('#');
var e1subs = '(^!)';
var expected = '#';
expectObservable(e1.repeat(3)).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('should raises error if source throws when repeating infinitely', function () {
var e1 = cold('#');
var e1subs = '(^!)';
var expected = '#';
expectObservable(e1.repeat()).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('should terminate repeat and throw if source subscription to _next throws', function () {
var e1 = Observable.of(1, 2, rxTestScheduler);
e1.subscribe(function () { throw new Error('error'); });
chai_1.expect(function () {
e1.repeat(3);
rxTestScheduler.flush();
}).to.throw();
});
it('should terminate repeat and throw if source subscription to _complete throws', function () {
var e1 = Observable.of(1, 2, rxTestScheduler);
e1.subscribe(function () {
//noop
}, function () {
//noop
}, function () { throw new Error('error'); });
chai_1.expect(function () {
e1.repeat(3);
rxTestScheduler.flush();
}).to.throw();
});
it('should terminate repeat and throw if source subscription to _next throws when repeating infinitely', function () {
var e1 = Observable.of(1, 2, rxTestScheduler);
e1.subscribe(function () { throw new Error('error'); });
chai_1.expect(function () {
e1.repeat();
rxTestScheduler.flush();
}).to.throw();
});
it('should terminate repeat and throw if source subscription to _complete throws when repeating infinitely', function () {
var e1 = Observable.of(1, 2, rxTestScheduler);
e1.subscribe(function () {
//noop
}, function () {
//noop
}, function () { throw new Error('error'); });
chai_1.expect(function () {
e1.repeat();
rxTestScheduler.flush();
}).to.throw();
});
it('should raise error after first emit succeed', function () {
var repeated = false;
var e1 = cold('--a--|').map(function (x) {
if (repeated) {
throw 'error';
}
else {
repeated = true;
return x;
}
});
var expected = '--a----#';
expectObservable(e1.repeat(2)).toBe(expected);
});
it('should repeat a synchronous source (multicasted and refCounted) multiple times', function (done) {
var expected = [1, 2, 3, 1, 2, 3, 1, 2, 3, 1, 2, 3, 1, 2, 3];
Observable.of(1, 2, 3)
.multicast(function () { return new Rx.Subject(); })
.refCount()
.repeat(5)
.subscribe(function (x) { chai_1.expect(x).to.equal(expected.shift()); }, function (x) {
done(new Error('should not be called'));
}, function () {
chai_1.expect(expected.length).to.equal(0);
done();
});
});
});
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