spec-js/operators/let-spec.js

"use strict";
var chai_1 = require('chai');
var Rx = require('../../dist/package/Rx');
/** @test {let} */
describe('Observable.prototype.let', function () {
    it('should be able to compose with let', function (done) {
        var expected = ['aa', 'bb'];
        var i = 0;
        var foo = function (observable) { return observable.map(function (x) { return x + x; }); };
        Rx.Observable
            .from(['a', 'b'])
            .let(foo)
            .subscribe(function (x) {
            chai_1.expect(x).to.equal(expected[i++]);
        }, function (x) {
            done(new Error('should not be called'));
        }, function () {
            done();
        });
    });
});
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