spec-js/observables/using-spec.js

"use strict";
var chai_1 = require('chai');
var Rx = require('../../dist/cjs/Rx');
var Observable = Rx.Observable;
var Subscription = Rx.Subscription;
describe('Observable.using', function () {
    it('should dispose of the resource when the subscription is disposed', function (done) {
        var disposed = false;
        var source = Observable.using(function () { return new Subscription(function () { return disposed = true; }); }, function (resource) { return Observable.range(0, 3); })
            .take(2);
        source.subscribe();
        if (disposed) {
            done();
        }
        else {
            done(new Error('disposed should be true but was false'));
        }
    });
    it('should accept factory returns promise resolves', function (done) {
        var expected = 42;
        var disposed = false;
        var e1 = Observable.using(function () { return new Subscription(function () { return disposed = true; }); }, function (resource) { return new Promise(function (resolve) { resolve(expected); }); });
        e1.subscribe(function (x) {
            chai_1.expect(x).to.equal(expected);
        }, function (x) {
            done(new Error('should not be called'));
        }, function () {
            done();
        });
    });
    it('should accept factory returns promise rejects', function (done) {
        var expected = 42;
        var disposed = false;
        var e1 = Observable.using(function () { return new Subscription(function () { return disposed = true; }); }, function (resource) { return new Promise(function (resolve, reject) { reject(expected); }); });
        e1.subscribe(function (x) {
            done(new Error('should not be called'));
        }, function (x) {
            chai_1.expect(x).to.equal(expected);
            done();
        }, function () {
            done(new Error('should not be called'));
        });
    });
    it('should raise error when resource factory throws', function (done) {
        var expectedError = 'expected';
        var error = 'error';
        var source = Observable.using(function () {
            throw expectedError;
        }, function (resource) {
            throw error;
        });
        source.subscribe(function (x) {
            done(new Error('should not be called'));
        }, function (x) {
            chai_1.expect(x).to.equal(expectedError);
            done();
        }, function () {
            done(new Error('should not be called'));
        });
    });
    it('should raise error when observable factory throws', function (done) {
        var error = 'error';
        var disposed = false;
        var source = Observable.using(function () { return new Subscription(function () { return disposed = true; }); }, function (resource) {
            throw error;
        });
        source.subscribe(function (x) {
            done(new Error('should not be called'));
        }, function (x) {
            chai_1.expect(x).to.equal(error);
            done();
        }, function () {
            done(new Error('should not be called'));
        });
    });
});
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