spec-js/observables/of-spec.js

"use strict";
var chai_1 = require('chai');
var Rx = require('../../dist/package/Rx');
var ArrayObservable_1 = require('../../dist/package/observable/ArrayObservable');
var ScalarObservable_1 = require('../../dist/package/observable/ScalarObservable');
var EmptyObservable_1 = require('../../dist/package/observable/EmptyObservable');
var Observable = Rx.Observable;
/** @test {of} */
describe('Observable.of', function () {
    asDiagram('of(1, 2, 3)')('should create a cold observable that emits 1, 2, 3', function () {
        var e1 = Observable.of(1, 2, 3)
            .concatMap(function (x, i) { return Observable.of(x).delay(i === 0 ? 0 : 20, rxTestScheduler); });
        var expected = 'x-y-(z|)';
        expectObservable(e1).toBe(expected, { x: 1, y: 2, z: 3 });
    });
    it('should create an observable from the provided values', function (done) {
        var x = { foo: 'bar' };
        var expected = [1, 'a', x];
        var i = 0;
        Observable.of(1, 'a', x)
            .subscribe(function (y) {
            chai_1.expect(y).to.equal(expected[i++]);
        }, function (x) {
            done(new Error('should not be called'));
        }, function () {
            done();
        });
    });
    it('should return a scalar observable if only passed one value', function () {
        var obs = Observable.of('one');
        chai_1.expect(obs instanceof ScalarObservable_1.ScalarObservable).to.be.true;
    });
    it('should return a scalar observable if only passed one value and a scheduler', function () {
        var obs = Observable.of('one', Rx.Scheduler.queue);
        chai_1.expect(obs instanceof ScalarObservable_1.ScalarObservable).to.be.true;
    });
    it('should return an array observable if passed many values', function () {
        var obs = Observable.of('one', 'two', 'three');
        chai_1.expect(obs instanceof ArrayObservable_1.ArrayObservable).to.be.true;
    });
    it('should return an empty observable if passed no values', function () {
        var obs = Observable.of();
        chai_1.expect(obs instanceof EmptyObservable_1.EmptyObservable).to.be.true;
    });
    it('should return an empty observable if passed only a scheduler', function () {
        var obs = Observable.of(Rx.Scheduler.queue);
        chai_1.expect(obs instanceof EmptyObservable_1.EmptyObservable).to.be.true;
    });
    it('should emit one value', function (done) {
        var calls = 0;
        Observable.of(42).subscribe(function (x) {
            chai_1.expect(++calls).to.equal(1);
            chai_1.expect(x).to.equal(42);
        }, function (err) {
            done(new Error('should not be called'));
        }, function () {
            done();
        });
    });
    it('should handle an Observable as the only value', function () {
        var source = Observable.of(Observable.of('a', 'b', 'c', rxTestScheduler), rxTestScheduler);
        chai_1.expect(source instanceof ScalarObservable_1.ScalarObservable).to.be.true;
        var result = source.concatAll();
        expectObservable(result).toBe('(abc|)');
    });
    it('should handle many Observable as the given values', function () {
        var source = Observable.of(Observable.of('a', 'b', 'c', rxTestScheduler), Observable.of('d', 'e', 'f', rxTestScheduler), rxTestScheduler);
        chai_1.expect(source instanceof ArrayObservable_1.ArrayObservable).to.be.true;
        var result = source.concatAll();
        expectObservable(result).toBe('(abcdef|)');
    });
});
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