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data-ice="title">spec-js/observables/bindNodeCallback-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 {bindNodeCallback} */ describe('Observable.bindNodeCallback', function () { describe('when not scheduled', function () { it('should emit one value from a callback', function () { function callback(datum, cb) { cb(null, datum); } var boundCallback = Observable.bindNodeCallback(callback); var results = []; boundCallback(42) .subscribe(function (x) { results.push(x); }, null, function () { results.push('done'); }); chai_1.expect(results).to.deep.equal([42, 'done']); }); it('should emit one value chosen by a selector', function () { function callback(datum, cb) { cb(null, datum); } var boundCallback = Observable.bindNodeCallback(callback, function (datum) { return datum; }); var results = []; boundCallback(42) .subscribe(function (x) { results.push(x); }, null, function () { results.push('done'); }); chai_1.expect(results).to.deep.equal([42, 'done']); }); it('should raise error from callback', function () { var error = new Error(); function callback(cb) { cb(error); } var boundCallback = Observable.bindNodeCallback(callback); var results = []; boundCallback() .subscribe(function () { throw 'should not next'; }, function (err) { results.push(err); }, function () { throw 'should not complete'; }); chai_1.expect(results).to.deep.equal([error]); }); it('should emit an error when the selector throws', function () { function callback(cb) { cb(null, 42); } var expected = new Error('Yikes!'); var boundCallback = Observable.bindNodeCallback(callback, function (err) { throw expected; }); boundCallback() .subscribe(function () { throw 'should not next'; }, function (err) { chai_1.expect(err).to.equal(expected); }, function () { throw 'should not complete'; }); }); 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 timeout; function callback(datum, cb) { // Need to cb async in order for the unsub to trigger timeout = setTimeout(function () { cb(null, datum); }); } var subscription = Observable.bindNodeCallback(callback)(42) .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; clearTimeout(timeout); done(); }); }); }); describe('when scheduled', function () { it('should emit one value from a callback', function () { function callback(datum, cb) { cb(null, datum); } var boundCallback = Observable.bindNodeCallback(callback, null, rxTestScheduler); var results = []; boundCallback(42) .subscribe(function (x) { results.push(x); }, null, function () { results.push('done'); }); rxTestScheduler.flush(); chai_1.expect(results).to.deep.equal([42, 'done']); }); it('should error if callback throws', function () { var expected = new Error('haha no callback for you'); function callback(datum, cb) { throw expected; } var boundCallback = Observable.bindNodeCallback(callback, null, rxTestScheduler); boundCallback(42) .subscribe(function (x) { throw 'should not next'; }, function (err) { chai_1.expect(err).to.equal(expected); }, function () { throw 'should not complete'; }); rxTestScheduler.flush(); }); it('should raise error from callback', function () { var error = new Error(); function callback(cb) { cb(error); } var boundCallback = Observable.bindNodeCallback(callback, null, rxTestScheduler); var results = []; boundCallback() .subscribe(function () { throw 'should not next'; }, function (err) { results.push(err); }, function () { throw 'should not complete'; }); rxTestScheduler.flush(); chai_1.expect(results).to.deep.equal([error]); }); it('should error if selector throws', function () { var expected = new Error('what? a selector? I don\'t think so'); function callback(datum, cb) { cb(null, datum); } function selector() { throw expected; } var boundCallback = Observable.bindNodeCallback(callback, selector, rxTestScheduler); boundCallback(42) .subscribe(function (x) { throw 'should not next'; }, function (err) { chai_1.expect(err).to.equal(expected); }, function () { throw 'should not complete'; }); rxTestScheduler.flush(); }); it('should use a selector', function () { function callback(datum, cb) { cb(null, datum); } function selector(x) { return x + '!!!'; } var boundCallback = Observable.bindNodeCallback(callback, selector, rxTestScheduler); var results = []; boundCallback(42) .subscribe(function (x) { results.push(x); }, null, function () { results.push('done'); }); rxTestScheduler.flush(); chai_1.expect(results).to.deep.equal(['42!!!', 'done']); }); }); it('should pass multiple inner arguments as an array', function () { function callback(datum, cb) { cb(null, datum, 1, 2, 3); } var boundCallback = Observable.bindNodeCallback(callback, null, rxTestScheduler); var results = []; boundCallback(42) .subscribe(function (x) { results.push(x); }, null, function () { results.push('done'); }); rxTestScheduler.flush(); chai_1.expect(results).to.deep.equal([[42, 1, 2, 3], 'done']); }); it('should pass multiple inner arguments to the selector if there is one', function () { function callback(datum, cb) { cb(null, datum, 1, 2, 3); } function selector(a, b, c, d) { chai_1.expect([a, b, c, d]).to.deep.equal([42, 1, 2, 3]); return a + b + c + d; } var boundCallback = Observable.bindNodeCallback(callback, selector, rxTestScheduler); var results = []; boundCallback(42) .subscribe(function (x) { results.push(x); }, null, function () { results.push('done'); }); rxTestScheduler.flush(); chai_1.expect(results).to.deep.equal([48, 'done']); }); it('should cache value for next subscription and not call callbackFunc again', function () { var calls = 0; function callback(datum, cb) { calls++; cb(null, datum); } var boundCallback = Observable.bindNodeCallback(callback, null, rxTestScheduler); var results1 = []; var results2 = []; var source = boundCallback(42); source.subscribe(function (x) { results1.push(x); }, null, function () { results1.push('done'); }); source.subscribe(function (x) { results2.push(x); }, null, function () { results2.push('done'); }); rxTestScheduler.flush(); chai_1.expect(calls).to.equal(1); chai_1.expect(results1).to.deep.equal([42, 'done']); chai_1.expect(results2).to.deep.equal([42, 'done']); }); }); //# sourceMappingURL=bindNodeCallback-spec.js.map</code></pre> </div> <footer class="footer"> Generated by <a href="https://esdoc.org">ESDoc<span data-ice="esdocVersion">(0.4.8)</span></a> </footer> <script src="script/search_index.js"></script> <script src="script/search.js"></script> <script src="script/pretty-print.js"></script> <script src="script/inherited-summary.js"></script> <script src="script/test-summary.js"></script> <script src="script/inner-link.js"></script> <script src="script/patch-for-local.js"></script> </body> </html>