@reactivex/rxjs
Version:
Reactive Extensions for modern JavaScript
172 lines • 6.93 kB
JavaScript
;
var chai_1 = require('chai');
var Rx = require('../../dist/cjs/Rx');
var Observable = Rx.Observable;
/** @test {retry} */
describe('Observable.prototype.retry', function () {
asDiagram('retry(2)')('should handle a basic source that emits next then errors, count=3', function () {
var source = cold('--1-2-3-#');
var subs = ['^ ! ',
' ^ ! ',
' ^ !'];
var expected = '--1-2-3---1-2-3---1-2-3-#';
var result = source.retry(2);
expectObservable(result).toBe(expected);
expectSubscriptions(source.subscriptions).toBe(subs);
});
it('should retry a number of times, without error, then complete', function (done) {
var errors = 0;
var retries = 2;
Observable.create(function (observer) {
observer.next(42);
observer.complete();
})
.map(function (x) {
if (++errors < retries) {
throw 'bad';
}
errors = 0;
return x;
})
.retry(retries)
.subscribe(function (x) {
chai_1.expect(x).to.equal(42);
}, function (err) {
chai_1.expect('this was called').to.be.true;
}, done);
});
it('should retry a number of times, then call error handler', function (done) {
var errors = 0;
var retries = 2;
Observable.create(function (observer) {
observer.next(42);
observer.complete();
})
.map(function (x) {
errors += 1;
throw 'bad';
})
.retry(retries - 1)
.subscribe(function (x) {
chai_1.expect(x).to.equal(42);
}, function (err) {
chai_1.expect(errors).to.equal(2);
done();
}, function () {
chai_1.expect('this was called').to.be.true;
});
});
it('should retry until successful completion', function (done) {
var errors = 0;
var retries = 10;
Observable.create(function (observer) {
observer.next(42);
observer.complete();
})
.map(function (x) {
if (++errors < retries) {
throw 'bad';
}
errors = 0;
return x;
})
.retry()
.take(retries)
.subscribe(function (x) {
chai_1.expect(x).to.equal(42);
}, function (err) {
chai_1.expect('this was called').to.be.true;
}, done);
});
it('should handle an empty source', function () {
var source = cold('|');
var subs = '(^!)';
var expected = '|';
var result = source.retry();
expectObservable(result).toBe(expected);
expectSubscriptions(source.subscriptions).toBe(subs);
});
it('should handle a never source', function () {
var source = cold('-');
var subs = '^';
var expected = '-';
var result = source.retry();
expectObservable(result).toBe(expected);
expectSubscriptions(source.subscriptions).toBe(subs);
});
it('should return a never observable given an async just-throw source and no count', function () {
var source = cold('-#'); // important that it's not a sync error
var unsub = ' !';
var expected = '--------------------------------------';
var result = source.retry();
expectObservable(result, unsub).toBe(expected);
});
it('should handle a basic source that emits next then completes', function () {
var source = hot('--1--2--^--3--4--5---|');
var subs = '^ !';
var expected = '---3--4--5---|';
var result = source.retry();
expectObservable(result).toBe(expected);
expectSubscriptions(source.subscriptions).toBe(subs);
});
it('should handle a basic source that emits next but does not complete', function () {
var source = hot('--1--2--^--3--4--5---');
var subs = '^ ';
var expected = '---3--4--5---';
var result = source.retry();
expectObservable(result).toBe(expected);
expectSubscriptions(source.subscriptions).toBe(subs);
});
it('should handle a basic source that emits next then errors, no count', function () {
var source = cold('--1-2-3-#');
var unsub = ' !';
var subs = ['^ ! ',
' ^ ! ',
' ^ ! ',
' ^ ! ',
' ^ !'];
var expected = '--1-2-3---1-2-3---1-2-3---1-2-3---1-2-';
var result = source.retry();
expectObservable(result, unsub).toBe(expected);
expectSubscriptions(source.subscriptions).toBe(subs);
});
it('should handle a source which eventually throws, count=3, and result is ' +
'unsubscribed early', function () {
var source = cold('--1-2-3-#');
var unsub = ' ! ';
var subs = ['^ ! ',
' ^ ! '];
var expected = '--1-2-3---1-2-';
var result = source.retry(3);
expectObservable(result, unsub).toBe(expected);
expectSubscriptions(source.subscriptions).toBe(subs);
});
it('should not break unsubscription chain when unsubscribed explicitly', function () {
var source = cold('--1-2-3-#');
var subs = ['^ ! ',
' ^ ! '];
var expected = '--1-2-3---1-2-';
var unsub = ' ! ';
var result = source
.mergeMap(function (x) { return Observable.of(x); })
.retry(100)
.mergeMap(function (x) { return Observable.of(x); });
expectObservable(result, unsub).toBe(expected);
expectSubscriptions(source.subscriptions).toBe(subs);
});
it('should retry 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).concat(Observable.throw('bad!'))
.multicast(function () { return new Rx.Subject(); })
.refCount()
.retry(4)
.subscribe(function (x) { chai_1.expect(x).to.equal(expected.shift()); }, function (err) {
chai_1.expect(err).to.equal('bad!');
chai_1.expect(expected.length).to.equal(0);
done();
}, function () {
done(new Error('should not be called'));
});
});
});
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