@reactivex/rxjs
Version:
Reactive Extensions for modern JavaScript
37 lines • 1.32 kB
JavaScript
;
var chai_1 = require('chai');
var Rx = require('../../dist/cjs/Rx');
var Observable = Rx.Observable;
/** @test {toPromise} */
describe('Observable.prototype.toPromise', function () {
it('should convert an Observable to a promise of its last value', function (done) {
Observable.of(1, 2, 3).toPromise(Promise).then(function (x) {
chai_1.expect(x).to.equal(3);
done();
});
});
it('should handle errors properly', function (done) {
Observable.throw('bad').toPromise(Promise).then(function () {
done(new Error('should not be called'));
}, function (err) {
chai_1.expect(err).to.equal('bad');
done();
});
});
it('should allow for global config via Rx.config.Promise', function (done) {
var wasCalled = false;
__root__.Rx = {};
__root__.Rx.config = {};
__root__.Rx.config.Promise = function MyPromise(callback) {
wasCalled = true;
return new Promise(callback);
};
Observable.of(42).toPromise().then(function (x) {
chai_1.expect(wasCalled).to.be.true;
chai_1.expect(x).to.equal(42);
delete __root__.Rx;
done();
});
});
});
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