spec-js/Subject-spec.js
"use strict";
var _this = this;
var chai_1 = require('chai');
var Rx = require('../dist/package/Rx');
var Subject = Rx.Subject;
var Observable = Rx.Observable;
/** @test {Subject} */
describe('Subject', function () {
it('should pump values right on through itself', function (done) {
var subject = new Subject();
var expected = ['foo', 'bar'];
subject.subscribe(function (x) {
chai_1.expect(x).to.equal(expected.shift());
}, null, done);
subject.next('foo');
subject.next('bar');
subject.complete();
});
it('should pump values to multiple subscribers', function (done) {
var subject = new Subject();
var expected = ['foo', 'bar'];
var i = 0;
var j = 0;
subject.subscribe(function (x) {
chai_1.expect(x).to.equal(expected[i++]);
});
subject.subscribe(function (x) {
chai_1.expect(x).to.equal(expected[j++]);
}, null, done);
chai_1.expect(subject.observers.length).to.equal(2);
subject.next('foo');
subject.next('bar');
subject.complete();
});
it('should handle subscribers that arrive and leave at different times, ' +
'subject does not complete', function () {
var subject = new Subject();
var results1 = [];
var results2 = [];
var results3 = [];
subject.next(1);
subject.next(2);
subject.next(3);
subject.next(4);
var subscription1 = subject.subscribe(function (x) { results1.push(x); }, function (e) { results1.push('E'); }, function () { results1.push('C'); });
subject.next(5);
var subscription2 = subject.subscribe(function (x) { results2.push(x); }, function (e) { results2.push('E'); }, function () { results2.push('C'); });
subject.next(6);
subject.next(7);
subscription1.unsubscribe();
subject.next(8);
subscription2.unsubscribe();
subject.next(9);
subject.next(10);
var subscription3 = subject.subscribe(function (x) { results3.push(x); }, function (e) { results3.push('E'); }, function () { results3.push('C'); });
subject.next(11);
subscription3.unsubscribe();
chai_1.expect(results1).to.deep.equal([5, 6, 7]);
chai_1.expect(results2).to.deep.equal([6, 7, 8]);
chai_1.expect(results3).to.deep.equal([11]);
});
it('should handle subscribers that arrive and leave at different times, ' +
'subject completes', function () {
var subject = new Subject();
var results1 = [];
var results2 = [];
var results3 = [];
subject.next(1);
subject.next(2);
subject.next(3);
subject.next(4);
var subscription1 = subject.subscribe(function (x) { results1.push(x); }, function (e) { results1.push('E'); }, function () { results1.push('C'); });
subject.next(5);
var subscription2 = subject.subscribe(function (x) { results2.push(x); }, function (e) { results2.push('E'); }, function () { results2.push('C'); });
subject.next(6);
subject.next(7);
subscription1.unsubscribe();
subject.complete();
subscription2.unsubscribe();
var subscription3 = subject.subscribe(function (x) { results3.push(x); }, function (e) { results3.push('E'); }, function () { results3.push('C'); });
subscription3.unsubscribe();
chai_1.expect(results1).to.deep.equal([5, 6, 7]);
chai_1.expect(results2).to.deep.equal([6, 7, 'C']);
chai_1.expect(results3).to.deep.equal(['C']);
});
it('should handle subscribers that arrive and leave at different times, ' +
'subject terminates with an error', function () {
var subject = new Subject();
var results1 = [];
var results2 = [];
var results3 = [];
subject.next(1);
subject.next(2);
subject.next(3);
subject.next(4);
var subscription1 = subject.subscribe(function (x) { results1.push(x); }, function (e) { results1.push('E'); }, function () { results1.push('C'); });
subject.next(5);
var subscription2 = subject.subscribe(function (x) { results2.push(x); }, function (e) { results2.push('E'); }, function () { results2.push('C'); });
subject.next(6);
subject.next(7);
subscription1.unsubscribe();
subject.error(new Error('err'));
subscription2.unsubscribe();
var subscription3 = subject.subscribe(function (x) { results3.push(x); }, function (e) { results3.push('E'); }, function () { results3.push('C'); });
subscription3.unsubscribe();
chai_1.expect(results1).to.deep.equal([5, 6, 7]);
chai_1.expect(results2).to.deep.equal([6, 7, 'E']);
chai_1.expect(results3).to.deep.equal(['E']);
});
it('should handle subscribers that arrive and leave at different times, ' +
'subject completes before nexting any value', function () {
var subject = new Subject();
var results1 = [];
var results2 = [];
var results3 = [];
var subscription1 = subject.subscribe(function (x) { results1.push(x); }, function (e) { results1.push('E'); }, function () { results1.push('C'); });
var subscription2 = subject.subscribe(function (x) { results2.push(x); }, function (e) { results2.push('E'); }, function () { results2.push('C'); });
subscription1.unsubscribe();
subject.complete();
subscription2.unsubscribe();
var subscription3 = subject.subscribe(function (x) { results3.push(x); }, function (e) { results3.push('E'); }, function () { results3.push('C'); });
subscription3.unsubscribe();
chai_1.expect(results1).to.deep.equal([]);
chai_1.expect(results2).to.deep.equal(['C']);
chai_1.expect(results3).to.deep.equal(['C']);
});
it('should disallow new subscriber once subject has been disposed', function () {
var subject = new Subject();
var results1 = [];
var results2 = [];
var results3 = [];
var subscription1 = subject.subscribe(function (x) { results1.push(x); }, function (e) { results1.push('E'); }, function () { results1.push('C'); });
subject.next(1);
subject.next(2);
var subscription2 = subject.subscribe(function (x) { results2.push(x); }, function (e) { results2.push('E'); }, function () { results2.push('C'); });
subject.next(3);
subject.next(4);
subject.next(5);
subscription1.unsubscribe();
subscription2.unsubscribe();
subject.unsubscribe();
chai_1.expect(function () {
subject.subscribe(function (x) { results3.push(x); }, function (err) {
chai_1.expect(false).to.equal('should not throw error: ' + err.toString());
});
}).to.throw(Rx.ObjectUnsubscribedError);
chai_1.expect(results1).to.deep.equal([1, 2, 3, 4, 5]);
chai_1.expect(results2).to.deep.equal([3, 4, 5]);
chai_1.expect(results3).to.deep.equal([]);
});
it('should not allow values to be nexted after it is unsubscribed', function (done) {
var subject = new Subject();
var expected = ['foo'];
subject.subscribe(function (x) {
chai_1.expect(x).to.equal(expected.shift());
});
subject.next('foo');
subject.unsubscribe();
chai_1.expect(function () { return subject.next('bar'); }).to.throw(Rx.ObjectUnsubscribedError);
done();
});
it('should clean out unsubscribed subscribers', function (done) {
var subject = new Subject();
var sub1 = subject.subscribe(function (x) {
//noop
});
var sub2 = subject.subscribe(function (x) {
//noop
});
chai_1.expect(subject.observers.length).to.equal(2);
sub1.unsubscribe();
chai_1.expect(subject.observers.length).to.equal(1);
sub2.unsubscribe();
chai_1.expect(subject.observers.length).to.equal(0);
done();
});
it('should have a static create function that works', function () {
chai_1.expect(Subject.create).to.be.a('function');
var source = Observable.of(1, 2, 3, 4, 5);
var nexts = [];
var output = [];
var error;
var complete = false;
var outputComplete = false;
var destination = {
closed: false,
next: function (x) {
nexts.push(x);
},
error: function (err) {
error = err;
this.closed = true;
},
complete: function () {
complete = true;
_this.closed = true;
}
};
var sub = Subject.create(destination, source);
sub.subscribe(function (x) {
output.push(x);
}, null, function () {
outputComplete = true;
});
sub.next('a');
sub.next('b');
sub.next('c');
sub.complete();
chai_1.expect(nexts).to.deep.equal(['a', 'b', 'c']);
chai_1.expect(complete).to.be.true;
chai_1.expect(error).to.be.a('undefined');
chai_1.expect(output).to.deep.equal([1, 2, 3, 4, 5]);
chai_1.expect(outputComplete).to.be.true;
});
it('should have a static create function that works also to raise errors', function () {
chai_1.expect(Subject.create).to.be.a('function');
var source = Observable.of(1, 2, 3, 4, 5);
var nexts = [];
var output = [];
var error;
var complete = false;
var outputComplete = false;
var destination = {
closed: false,
next: function (x) {
nexts.push(x);
},
error: function (err) {
error = err;
this.closed = true;
},
complete: function () {
complete = true;
_this.closed = true;
}
};
var sub = Subject.create(destination, source);
sub.subscribe(function (x) {
output.push(x);
}, null, function () {
outputComplete = true;
});
sub.next('a');
sub.next('b');
sub.next('c');
sub.error('boom');
chai_1.expect(nexts).to.deep.equal(['a', 'b', 'c']);
chai_1.expect(complete).to.be.false;
chai_1.expect(error).to.equal('boom');
chai_1.expect(output).to.deep.equal([1, 2, 3, 4, 5]);
chai_1.expect(outputComplete).to.be.true;
});
it('should be an Observer which can be given to Observable.subscribe', function (done) {
var source = Observable.of(1, 2, 3, 4, 5);
var subject = new Subject();
var expected = [1, 2, 3, 4, 5];
subject.subscribe(function (x) {
chai_1.expect(x).to.equal(expected.shift());
}, function (x) {
done(new Error('should not be called'));
}, function () {
done();
});
source.subscribe(subject);
});
it('should be usable as an Observer of a finite delayed Observable', function (done) {
var source = Rx.Observable.of(1, 2, 3).delay(50);
var subject = new Rx.Subject();
var expected = [1, 2, 3];
subject.subscribe(function (x) {
chai_1.expect(x).to.equal(expected.shift());
}, function (x) {
done(new Error('should not be called'));
}, function () {
done();
});
source.subscribe(subject);
});
it('should throw ObjectUnsubscribedError when emit after unsubscribed', function () {
var subject = new Rx.Subject();
subject.unsubscribe();
chai_1.expect(function () {
subject.next('a');
}).to.throw(Rx.ObjectUnsubscribedError);
chai_1.expect(function () {
subject.error('a');
}).to.throw(Rx.ObjectUnsubscribedError);
chai_1.expect(function () {
subject.complete();
}).to.throw(Rx.ObjectUnsubscribedError);
});
it('should not next after completed', function () {
var subject = new Rx.Subject();
var results = [];
subject.subscribe(function (x) { return results.push(x); }, null, function () { return results.push('C'); });
subject.next('a');
subject.complete();
subject.next('b');
chai_1.expect(results).to.deep.equal(['a', 'C']);
});
it('should not next after error', function () {
var error = new Error('wut?');
var subject = new Rx.Subject();
var results = [];
subject.subscribe(function (x) { return results.push(x); }, function (err) { return results.push(err); });
subject.next('a');
subject.error(error);
subject.next('b');
chai_1.expect(results).to.deep.equal(['a', error]);
});
describe('asObservable', function () {
it('should hide subject', function () {
var subject = new Rx.Subject();
var observable = subject.asObservable();
chai_1.expect(subject).not.to.equal(observable);
chai_1.expect(observable instanceof Observable).to.be.true;
chai_1.expect(observable instanceof Subject).to.be.false;
});
it('should handle subject never emits', function () {
var observable = hot('-').asObservable();
expectObservable(observable).toBe([]);
});
it('should handle subject completes without emits', function () {
var observable = hot('--^--|').asObservable();
var expected = '---|';
expectObservable(observable).toBe(expected);
});
it('should handle subject throws', function () {
var observable = hot('--^--#').asObservable();
var expected = '---#';
expectObservable(observable).toBe(expected);
});
it('should handle subject emits', function () {
var observable = hot('--^--x--|').asObservable();
var expected = '---x--|';
expectObservable(observable).toBe(expected);
});
it('should work with inherited subject', function () {
var results = [];
var subject = new Rx.AsyncSubject();
subject.next(42);
subject.complete();
var observable = subject.asObservable();
observable.subscribe(function (x) { return results.push(x); }, null, function () { return results.push('done'); });
chai_1.expect(results).to.deep.equal([42, 'done']);
});
});
});
describe('AnonymousSubject', function () {
it('should be exposed', function () {
chai_1.expect(Rx.AnonymousSubject).to.be.a('function');
});
it('should not eager', function () {
var subscribed = false;
var subject = Rx.Subject.create(null, new Rx.Observable(function (observer) {
subscribed = true;
var subscription = Rx.Observable.of('x').subscribe(observer);
return function () {
subscription.unsubscribe();
};
}));
var observable = subject.asObservable();
chai_1.expect(subscribed).to.be.false;
observable.subscribe();
chai_1.expect(subscribed).to.be.true;
});
});
//# sourceMappingURL=Subject-spec.js.map
