@reactivex/rxjs
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Reactive Extensions for modern JavaScript
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<div class="content" data-ice="content"><h1 data-ice="title">spec-js/observables/from-promise-spec.js</h1>
<pre class="source-code line-number raw-source-code"><code class="prettyprint linenums" data-ice="content">"use strict";
var chai_1 = require('chai');
var sinon = require('sinon');
var Rx = require('../../dist/cjs/Rx');
var Observable = Rx.Observable;
/** @test {fromPromise} */
describe('Observable.fromPromise', function () {
it('should emit one value from a resolved promise', function (done) {
var promise = Promise.resolve(42);
Observable.fromPromise(promise)
.subscribe(function (x) { chai_1.expect(x).to.equal(42); }, function (x) {
done(new Error('should not be called'));
}, function () {
done();
});
});
it('should raise error from a rejected promise', function (done) {
var promise = Promise.reject('bad');
Observable.fromPromise(promise)
.subscribe(function (x) {
done(new Error('should not be called'));
}, function (e) {
chai_1.expect(e).to.equal('bad');
done();
}, function () {
done(new Error('should not be called'));
});
});
it('should share the underlying promise with multiple subscribers', function (done) {
var promise = Promise.resolve(42);
var observable = Observable.fromPromise(promise);
observable
.subscribe(function (x) { chai_1.expect(x).to.equal(42); }, function (x) {
done(new Error('should not be called'));
}, null);
setTimeout(function () {
observable
.subscribe(function (x) { chai_1.expect(x).to.equal(42); }, function (x) {
done(new Error('should not be called'));
}, function () {
done();
});
});
});
it('should accept already-resolved Promise', function (done) {
var promise = Promise.resolve(42);
promise.then(function (x) {
chai_1.expect(x).to.equal(42);
Observable.fromPromise(promise)
.subscribe(function (y) { chai_1.expect(y).to.equal(42); }, function (x) {
done(new Error('should not be called'));
}, function () {
done();
});
}, function () {
done(new Error('should not be called'));
});
});
it('should emit a value from a resolved promise on a separate scheduler', function (done) {
var promise = Promise.resolve(42);
Observable.fromPromise(promise, Rx.Scheduler.asap)
.subscribe(function (x) { chai_1.expect(x).to.equal(42); }, function (x) {
done(new Error('should not be called'));
}, function () {
done();
});
});
it('should raise error from a rejected promise on a separate scheduler', function (done) {
var promise = Promise.reject('bad');
Observable.fromPromise(promise, Rx.Scheduler.asap)
.subscribe(function (x) { done(new Error('should not be called')); }, function (e) {
chai_1.expect(e).to.equal('bad');
done();
}, function () {
done(new Error('should not be called'));
});
});
it('should share the underlying promise with multiple subscribers on a separate scheduler', function (done) {
var promise = Promise.resolve(42);
var observable = Observable.fromPromise(promise, Rx.Scheduler.asap);
observable
.subscribe(function (x) { chai_1.expect(x).to.equal(42); }, function (x) {
done(new Error('should not be called'));
}, null);
setTimeout(function () {
observable
.subscribe(function (x) { chai_1.expect(x).to.equal(42); }, function (x) {
done(new Error('should not be called'));
}, function () {
done();
});
});
});
it('should not emit, throw or complete if immediately unsubscribed', function (done) {
var nextSpy = sinon.spy();
var throwSpy = sinon.spy();
var completeSpy = sinon.spy();
var promise = Promise.resolve(42);
var subscription = Observable.fromPromise(promise)
.subscribe(nextSpy, throwSpy, completeSpy);
subscription.unsubscribe();
setTimeout(function () {
chai_1.expect(nextSpy).not.have.been.called;
chai_1.expect(throwSpy).not.have.been.called;
chai_1.expect(completeSpy).not.have.been.called;
done();
});
});
if (typeof process === 'object' && Object.prototype.toString.call(process) === '[object process]') {
it('should globally throw unhandled errors on process', function (done) {
var originalException = process.listeners('uncaughtException');
process.removeAllListeners('uncaughtException');
process.once('uncaughtException', function (error) {
chai_1.expect(error).to.be.an('error', 'fail');
originalException.forEach(function (l) { return process.addListener('uncaughtException', l); });
done();
});
Observable.fromPromise(Promise.reject('bad'))
.subscribe(function (x) { done(new Error('should not be called')); }, function (e) {
chai_1.expect(e).to.equal('bad');
throw new Error('fail');
}, function () {
done(new Error('should not be called'));
});
});
}
else if (typeof window === 'object' &&
(Object.prototype.toString.call(window) === '[object global]' || Object.prototype.toString.call(window) === '[object Window]')) {
it('should globally throw unhandled errors on window', function (done) {
var expected = ['Uncaught fail', 'fail', 'Script error.', 'uncaught exception: fail'];
var current = window.onerror;
window.onerror = null;
var invoked = false;
function onException(e) {
if (invoked) {
return;
}
invoked = true;
chai_1.expect(expected).to.contain(e);
window.onerror = current;
done();
}
window.onerror = onException;
Observable.fromPromise(Promise.reject('bad'))
.subscribe(function (x) { done(new Error('should not be called')); }, function (e) {
chai_1.expect(e).to.equal('bad');
throw 'fail';
}, function () {
done(new Error('should not be called'));
});
});
}
});
//# sourceMappingURL=from-promise-spec.js.map</code></pre>
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