@reactivex/rxjs

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data-ice="title">spec-js/observables/generate-spec.js</h1> <pre class="source-code line-number raw-source-code"><code class="prettyprint linenums" data-ice="content">"use strict"; var Rx = require('../../dist/cjs/Rx'); require('../../dist/cjs/add/observable/generate'); var chai_1 = require('chai'); var Observable = Rx.Observable; function err() { throw 'error'; } describe('Observable.generate', function () { asDiagram('generate(1, x => false, x => x + 1)')('should complete if condition does not meet', function () { var source = Observable.generate(1, function (x) { return false; }, function (x) { return x + 1; }); var expected = '|'; expectObservable(source).toBe(expected); }); asDiagram('generate(1, x => x == 1, x => x + 1)')('should produce first value immediately', function () { var source = Observable.generate(1, function (x) { return x == 1; }, function (x) { return x + 1; }); var expected = '(1|)'; expectObservable(source).toBe(expected, { '1': 1 }); }); asDiagram('generate(1, x => x < 3, x => x + 1)')('should produce all values synchronously', function () { var source = Observable.generate(1, function (x) { return x < 3; }, function (x) { return x + 1; }); var expected = '(12|)'; expectObservable(source).toBe(expected, { '1': 1, '2': 2 }); }); it('should use result selector', function () { var source = Observable.generate(1, function (x) { return x < 3; }, function (x) { return x + 1; }, function (x) { return (x + 1).toString(); }); var expected = '(23|)'; expectObservable(source).toBe(expected); }); it('should allow omit condition', function () { var source = Observable.generate({ initialState: 1, iterate: function (x) { return x + 1; }, resultSelector: function (x) { return x.toString(); } }).take(5); var expected = '(12345|)'; expectObservable(source).toBe(expected); }); it('should stop producing when unsubscribed', function () { var source = Observable.generate(1, function (x) { return x < 4; }, function (x) { return x + 1; }); var count = 0; var subscriber = new Rx.Subscriber(function (x) { count++; if (x == 2) { subscriber.unsubscribe(); } }); source.subscribe(subscriber); chai_1.expect(count).to.be.equal(2); }); it('should accept a scheduler', function () { var source = Observable.generate({ initialState: 1, condition: function (x) { return x < 4; }, iterate: function (x) { return x + 1; }, resultSelector: function (x) { return x; }, scheduler: rxTestScheduler }); var expected = '(123|)'; var count = 0; source.subscribe(function (x) { return count++; }); chai_1.expect(count).to.be.equal(0); rxTestScheduler.flush(); chai_1.expect(count).to.be.equal(3); expectObservable(source).toBe(expected, { '1': 1, '2': 2, '3': 3 }); }); it('should allow minimal possible options', function () { var source = Observable.generate({ initialState: 1, iterate: function (x) { return x * 2; } }).take(3); var expected = '(124|)'; expectObservable(source).toBe(expected, { '1': 1, '2': 2, '4': 4 }); }); it('should emit error if result selector throws', function () { var source = Observable.generate({ initialState: 1, iterate: function (x) { return x * 2; }, resultSelector: err }); var expected = '(#)'; expectObservable(source).toBe(expected); }); it('should emit error if result selector throws on scheduler', function () { var source = Observable.generate({ initialState: 1, iterate: function (x) { return x * 2; }, resultSelector: err, scheduler: rxTestScheduler }); var expected = '(#)'; expectObservable(source).toBe(expected); }); it('should emit error after first value if iterate function throws', function () { var source = Observable.generate({ initialState: 1, iterate: err }); var expected = '(1#)'; expectObservable(source).toBe(expected, { '1': 1 }); }); it('should emit error after first value if iterate function throws on scheduler', function () { var source = Observable.generate({ initialState: 1, iterate: err, scheduler: rxTestScheduler }); var expected = '(1#)'; expectObservable(source).toBe(expected, { '1': 1 }); }); it('should emit error if condition function throws', function () { var source = Observable.generate({ initialState: 1, iterate: function (x) { return x + 1; }, condition: err }); var expected = '(#)'; expectObservable(source).toBe(expected); }); it('should emit error if condition function throws on scheduler', function () { var source = Observable.generate({ initialState: 1, iterate: function (x) { return x + 1; }, condition: err, scheduler: rxTestScheduler }); var expected = '(#)'; expectObservable(source).toBe(expected); }); }); //# sourceMappingURL=generate-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 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