spec-js/operators/toPromise-spec.js

"use strict";
var chai_1 = require('chai');
var Rx = require('../../dist/package/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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