@reactivex/rxjs
Version:
Reactive Extensions for modern JavaScript
394 lines (384 loc) • 25.1 kB
HTML
<html>
<head>
<meta charset="utf-8">
<base data-ice="baseUrl" href="../../../">
<title data-ice="title">spec-js/operators/switchMap-spec.js | RxJS API Document</title>
<link type="text/css" rel="stylesheet" href="css/style.css">
<link type="text/css" rel="stylesheet" href="css/prettify-tomorrow.css">
<script src="script/prettify/prettify.js"></script>
<script src="script/manual.js"></script>
<script data-ice="userScript" src="user/script/0-Rx.js"></script>
<script data-ice="userScript" src="user/script/1-devtools-welcome.js"></script>
<script data-ice="userScript" src="user/script/2-custom-manual-styles.js"></script>
<script data-ice="userScript" src="user/script/3-decision-tree-widget.min.js"></script>
<script data-ice="userScript" src="user/script/4-theme-toggler.js"></script>
<link data-ice="userStyle" rel="stylesheet" href="user/css/0-main.css">
</head>
<body class="layout-container" data-ice="rootContainer">
<header>
<a href="./">Home</a>
<a href="./manual/index.html" data-ice="manualHeaderLink">Manual</a>
<a href="identifiers.html">Reference</a>
<a href="source.html">Source</a>
<a href="test.html" data-ice="testLink">Test</a>
<a data-ice="repoURL" href="https://github.com/ReactiveX/RxJS" class="repo-url-github">Repository</a>
<div class="search-box">
<span>
<img src="./image/search.png">
<span class="search-input-edge"></span><input class="search-input"><span class="search-input-edge"></span>
</span>
<ul class="search-result"></ul>
</div>
</header>
<nav class="navigation" data-ice="nav"><div>
<ul>
<li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-AsyncSubject">AsyncSubject</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-BehaviorSubject">BehaviorSubject</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-Notification">Notification</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-Observable">Observable</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-ReplaySubject">ReplaySubject</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-Scheduler">Scheduler</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-AnonymousSubject">AnonymousSubject</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-Subject">Subject</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-SubjectSubscriber">SubjectSubscriber</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-Subscriber">Subscriber</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-Subscription">Subscription</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-typedef">T</span><span data-ice="name"><span><a href="typedef/index.html#static-typedef-Rx.Scheduler">Rx.Scheduler</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-typedef">T</span><span data-ice="name"><span><a href="typedef/index.html#static-typedef-Rx.Symbol">Rx.Symbol</a></span></span></li>
<li data-ice="doc"><div data-ice="dirPath" class="nav-dir-path">observable</div><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-ConnectableObservable">ConnectableObservable</a></span></span></li>
<li data-ice="doc"><div data-ice="dirPath" class="nav-dir-path">observable/dom</div><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-AjaxError">AjaxError</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-AjaxResponse">AjaxResponse</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-AjaxTimeoutError">AjaxTimeoutError</a></span></span></li>
<li data-ice="doc"><div data-ice="dirPath" class="nav-dir-path">operator</div><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-GroupedObservable">GroupedObservable</a></span></span></li>
<li data-ice="doc"><div data-ice="dirPath" class="nav-dir-path">scheduler</div><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-Action">Action</a></span></span></li>
<li data-ice="doc"><div data-ice="dirPath" class="nav-dir-path">util</div><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-ArgumentOutOfRangeError">ArgumentOutOfRangeError</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-EmptyError">EmptyError</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-ObjectUnsubscribedError">ObjectUnsubscribedError</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-TimeoutError">TimeoutError</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-UnsubscriptionError">UnsubscriptionError</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-root">root</a></span></span></li>
</ul>
</div>
</nav>
<div class="content" data-ice="content"><h1 data-ice="title">spec-js/operators/switchMap-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 Rx = require('../../dist/cjs/Rx');
var Observable = Rx.Observable;
/** @test {switchMap} */
describe('Observable.prototype.switchMap', function () {
asDiagram('switchMap(i => 10*i\u2014\u201410*i\u2014\u201410*i\u2014| )')('should map-and-flatten each item to an Observable', function () {
var e1 = hot('--1-----3--5-------|');
var e1subs = '^ !';
var e2 = cold('x-x-x| ', { x: 10 });
var expected = '--x-x-x-y-yz-z-z---|';
var values = { x: 10, y: 30, z: 50 };
var result = e1.switchMap(function (x) { return e2.map(function (i) { return i * x; }); });
expectObservable(result).toBe(expected, values);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('should switch with a selector function', function (done) {
var a = Observable.of(1, 2, 3);
var expected = ['a1', 'b1', 'c1', 'a2', 'b2', 'c2', 'a3', 'b3', 'c3'];
a.switchMap(function (x) { return Observable.of('a' + x, 'b' + x, 'c' + x); })
.subscribe(function (x) {
chai_1.expect(x).to.equal(expected.shift());
}, null, done);
});
it('should unsub inner observables', function () {
var unsubbed = [];
Observable.of('a', 'b').switchMap(function (x) {
return Observable.create(function (subscriber) {
subscriber.complete();
return function () {
unsubbed.push(x);
};
});
}).subscribe();
chai_1.expect(unsubbed).to.deep.equal(['a', 'b']);
});
it('should switch inner cold observables', function () {
var x = cold('--a--b--c--d--e--| ');
var xsubs = ' ^ ! ';
var y = cold('---f---g---h---i--|');
var ysubs = ' ^ !';
var e1 = hot('---------x---------y---------| ');
var e1subs = '^ !';
var expected = '-----------a--b--c----f---g---h---i--|';
var observableLookup = { x: x, y: y };
var result = e1.switchMap(function (value) { return observableLookup[value]; });
expectObservable(result).toBe(expected);
expectSubscriptions(x.subscriptions).toBe(xsubs);
expectSubscriptions(y.subscriptions).toBe(ysubs);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('should raise error when projection throws', function () {
var e1 = hot('-------x-----y---|');
var e1subs = '^ ! ';
var expected = '-------# ';
function project() {
throw 'error';
}
expectObservable(e1.switchMap(project)).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('should raise error when resultSelector throws', function () {
var x = cold('--a--b--c--d--e--| ');
var xsubs = ' ^ ! ';
var e1 = hot('---------x---------y---------|');
var e1subs = '^ ! ';
var expected = '-----------# ';
function selector() {
throw 'error';
}
var result = e1.switchMap(function (value) { return x; }, selector);
expectObservable(result).toBe(expected);
expectSubscriptions(x.subscriptions).toBe(xsubs);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('should switch inner cold observables, outer is unsubscribed early', function () {
var x = cold('--a--b--c--d--e--| ');
var xsubs = ' ^ ! ';
var y = cold('---f---g---h---i--|');
var ysubs = ' ^ ! ';
var e1 = hot('---------x---------y---------| ');
var e1subs = '^ ! ';
var unsub = ' ! ';
var expected = '-----------a--b--c---- ';
var observableLookup = { x: x, y: y };
var result = e1.switchMap(function (value) { return observableLookup[value]; });
expectObservable(result, unsub).toBe(expected);
expectSubscriptions(x.subscriptions).toBe(xsubs);
expectSubscriptions(y.subscriptions).toBe(ysubs);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('should not break unsubscription chains when result is unsubscribed explicitly', function () {
var x = cold('--a--b--c--d--e--| ');
var xsubs = ' ^ ! ';
var y = cold('---f---g---h---i--|');
var ysubs = ' ^ ! ';
var e1 = hot('---------x---------y---------| ');
var e1subs = '^ ! ';
var expected = '-----------a--b--c---- ';
var unsub = ' ! ';
var observableLookup = { x: x, y: y };
var result = e1
.mergeMap(function (x) { return Observable.of(x); })
.switchMap(function (value) { return observableLookup[value]; })
.mergeMap(function (x) { return Observable.of(x); });
expectObservable(result, unsub).toBe(expected);
expectSubscriptions(x.subscriptions).toBe(xsubs);
expectSubscriptions(y.subscriptions).toBe(ysubs);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('should switch inner cold observables, inner never completes', function () {
var x = cold('--a--b--c--d--e--| ');
var xsubs = ' ^ ! ';
var y = cold('---f---g---h---i--');
var ysubs = ' ^ ';
var e1 = hot('---------x---------y---------| ');
var e1subs = '^ ';
var expected = '-----------a--b--c----f---g---h---i--';
var observableLookup = { x: x, y: y };
var result = e1.switchMap(function (value) { return observableLookup[value]; });
expectObservable(result).toBe(expected);
expectSubscriptions(x.subscriptions).toBe(xsubs);
expectSubscriptions(y.subscriptions).toBe(ysubs);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('should handle a synchronous switch to the second inner observable', function () {
var x = cold('--a--b--c--d--e--| ');
var xsubs = ' (^!) ';
var y = cold('---f---g---h---i--| ');
var ysubs = ' ^ ! ';
var e1 = hot('---------(xy)----------------|');
var e1subs = '^ !';
var expected = '------------f---g---h---i----|';
var observableLookup = { x: x, y: y };
var result = e1.switchMap(function (value) { return observableLookup[value]; });
expectObservable(result).toBe(expected);
expectSubscriptions(x.subscriptions).toBe(xsubs);
expectSubscriptions(y.subscriptions).toBe(ysubs);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('should switch inner cold observables, one inner throws', function () {
var x = cold('--a--b--#--d--e--| ');
var xsubs = ' ^ ! ';
var y = cold('---f---g---h---i--');
var ysubs = [];
var e1 = hot('---------x---------y---------| ');
var e1subs = '^ ! ';
var expected = '-----------a--b--# ';
var observableLookup = { x: x, y: y };
var result = e1.switchMap(function (value) { return observableLookup[value]; });
expectObservable(result).toBe(expected);
expectSubscriptions(x.subscriptions).toBe(xsubs);
expectSubscriptions(y.subscriptions).toBe(ysubs);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('should switch inner hot observables', function () {
var x = hot('-----a--b--c--d--e--| ');
var xsubs = ' ^ ! ';
var y = hot('--p-o-o-p-------------f---g---h---i--|');
var ysubs = ' ^ !';
var e1 = hot('---------x---------y---------| ');
var e1subs = '^ !';
var expected = '-----------c--d--e----f---g---h---i--|';
var observableLookup = { x: x, y: y };
var result = e1.switchMap(function (value) { return observableLookup[value]; });
expectObservable(result).toBe(expected);
expectSubscriptions(x.subscriptions).toBe(xsubs);
expectSubscriptions(y.subscriptions).toBe(ysubs);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('should switch inner empty and empty', function () {
var x = cold('|');
var y = cold('|');
var xsubs = ' (^!) ';
var ysubs = ' (^!) ';
var e1 = hot('---------x---------y---------|');
var e1subs = '^ !';
var expected = '-----------------------------|';
var observableLookup = { x: x, y: y };
var result = e1.switchMap(function (value) { return observableLookup[value]; });
expectObservable(result).toBe(expected);
expectSubscriptions(x.subscriptions).toBe(xsubs);
expectSubscriptions(y.subscriptions).toBe(ysubs);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('should switch inner empty and never', function () {
var x = cold('|');
var y = cold('-');
var xsubs = ' (^!) ';
var ysubs = ' ^ ';
var e1 = hot('---------x---------y---------|');
var e1subs = '^ ';
var expected = '------------------------------';
var observableLookup = { x: x, y: y };
var result = e1.switchMap(function (value) { return observableLookup[value]; });
expectObservable(result).toBe(expected);
expectSubscriptions(x.subscriptions).toBe(xsubs);
expectSubscriptions(y.subscriptions).toBe(ysubs);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('should switch inner never and empty', function () {
var x = cold('-');
var y = cold('|');
var xsubs = ' ^ ! ';
var ysubs = ' (^!) ';
var e1 = hot('---------x---------y---------|');
var e1subs = '^ !';
var expected = '-----------------------------|';
var observableLookup = { x: x, y: y };
var result = e1.switchMap(function (value) { return observableLookup[value]; });
expectObservable(result).toBe(expected);
expectSubscriptions(x.subscriptions).toBe(xsubs);
expectSubscriptions(y.subscriptions).toBe(ysubs);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('should switch inner never and throw', function () {
var x = cold('-');
var y = cold('#', null, 'sad');
var xsubs = ' ^ ! ';
var ysubs = ' (^!) ';
var e1 = hot('---------x---------y---------|');
var e1subs = '^ ! ';
var expected = '-------------------# ';
var observableLookup = { x: x, y: y };
var result = e1.switchMap(function (value) { return observableLookup[value]; });
expectObservable(result).toBe(expected, undefined, 'sad');
expectSubscriptions(x.subscriptions).toBe(xsubs);
expectSubscriptions(y.subscriptions).toBe(ysubs);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('should switch inner empty and throw', function () {
var x = cold('|');
var y = cold('#', null, 'sad');
var xsubs = ' (^!) ';
var ysubs = ' (^!) ';
var e1 = hot('---------x---------y---------|');
var e1subs = '^ ! ';
var expected = '-------------------# ';
var observableLookup = { x: x, y: y };
var result = e1.switchMap(function (value) { return observableLookup[value]; });
expectObservable(result).toBe(expected, undefined, 'sad');
expectSubscriptions(x.subscriptions).toBe(xsubs);
expectSubscriptions(y.subscriptions).toBe(ysubs);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('should handle outer empty', function () {
var e1 = cold('|');
var e1subs = '(^!)';
var expected = '|';
var result = e1.switchMap(function (value) { return Observable.of(value); });
expectObservable(result).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('should handle outer never', function () {
var e1 = cold('-');
var e1subs = '^';
var expected = '-';
var result = e1.switchMap(function (value) { return Observable.of(value); });
expectObservable(result).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('should handle outer throw', function () {
var e1 = cold('#');
var e1subs = '(^!)';
var expected = '#';
var result = e1.switchMap(function (value) { return Observable.of(value); });
expectObservable(result).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('should handle outer error', function () {
var x = cold('--a--b--c--d--e--|');
var xsubs = ' ^ ! ';
var e1 = hot('---------x---------# ');
var e1subs = '^ ! ';
var expected = '-----------a--b--c-# ';
var observableLookup = { x: x };
var result = e1.switchMap(function (value) { return observableLookup[value]; });
expectObservable(result).toBe(expected);
expectSubscriptions(x.subscriptions).toBe(xsubs);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('should switch with resultSelector goodness', function () {
var x = cold('--a--b--c--d--e--| ');
var xsubs = ' ^ ! ';
var y = cold('---f---g---h---i--|');
var ysubs = ' ^ !';
var e1 = hot('---------x---------y---------| ');
var e1subs = '^ !';
var expected = '-----------a--b--c----f---g---h---i--|';
var observableLookup = { x: x, y: y };
var expectedValues = {
a: ['x', 'a', 0, 0],
b: ['x', 'b', 0, 1],
c: ['x', 'c', 0, 2],
f: ['y', 'f', 1, 0],
g: ['y', 'g', 1, 1],
h: ['y', 'h', 1, 2],
i: ['y', 'i', 1, 3]
};
var result = e1.switchMap(function (value) { return observableLookup[value]; }, function (innerValue, outerValue, innerIndex, outerIndex) { return [innerValue, outerValue, innerIndex, outerIndex]; });
expectObservable(result).toBe(expected, expectedValues);
expectSubscriptions(x.subscriptions).toBe(xsubs);
expectSubscriptions(y.subscriptions).toBe(ysubs);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
});
//# sourceMappingURL=switchMap-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>