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<div class="content" data-ice="content"><h1 data-ice="title">spec-js/observables/combineLatest-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;
var queueScheduler = Rx.Scheduler.queue;
/** @test {combineLatest} */
describe('Observable.combineLatest', function () {
it('should combineLatest the provided observables', function () {
var firstSource = hot('----a----b----c----|');
var secondSource = hot('--d--e--f--g--|');
var expected = '----uv--wx-y--z----|';
var combined = Observable.combineLatest(firstSource, secondSource, function (a, b) { return '' + a + b; });
expectObservable(combined).toBe(expected, { u: 'ad', v: 'ae', w: 'af', x: 'bf', y: 'bg', z: 'cg' });
});
it('should combine an immediately-scheduled source with an immediately-scheduled second', function (done) {
var a = Observable.of(1, 2, 3, queueScheduler);
var b = Observable.of(4, 5, 6, 7, 8, queueScheduler);
var r = [[1, 4], [2, 4], [2, 5], [3, 5], [3, 6], [3, 7], [3, 8]];
//type definition need to be updated
Observable.combineLatest(a, b, queueScheduler).subscribe(function (vals) {
chai_1.expect(vals).to.deep.equal(r.shift());
}, function (x) {
done(new Error('should not be called'));
}, function () {
chai_1.expect(r.length).to.equal(0);
done();
});
});
it('should accept array of observables', function () {
var firstSource = hot('----a----b----c----|');
var secondSource = hot('--d--e--f--g--|');
var expected = '----uv--wx-y--z----|';
var combined = Observable.combineLatest([firstSource, secondSource], function (a, b) { return '' + a + b; });
expectObservable(combined).toBe(expected, { u: 'ad', v: 'ae', w: 'af', x: 'bf', y: 'bg', z: 'cg' });
});
it('should work with two nevers', function () {
var e1 = cold('-');
var e1subs = '^';
var e2 = cold('-');
var e2subs = '^';
var expected = '-';
var result = Observable.combineLatest(e1, e2, function (x, y) { return x + y; });
expectObservable(result).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
expectSubscriptions(e2.subscriptions).toBe(e2subs);
});
it('should work with never and empty', function () {
var e1 = cold('-');
var e1subs = '^';
var e2 = cold('|');
var e2subs = '(^!)';
var expected = '-';
var result = Observable.combineLatest(e1, e2, function (x, y) { return x + y; });
expectObservable(result).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
expectSubscriptions(e2.subscriptions).toBe(e2subs);
});
it('should work with empty and never', function () {
var e1 = cold('|');
var e1subs = '(^!)';
var e2 = cold('-');
var e2subs = '^';
var expected = '-';
var result = Observable.combineLatest(e1, e2, function (x, y) { return x + y; });
expectObservable(result).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
expectSubscriptions(e2.subscriptions).toBe(e2subs);
});
it('should work with empty and empty', function () {
var e1 = cold('|');
var e1subs = '(^!)';
var e2 = cold('|');
var e2subs = '(^!)';
var expected = '|';
var result = Observable.combineLatest(e1, e2, function (x, y) { return x + y; });
expectObservable(result).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
expectSubscriptions(e2.subscriptions).toBe(e2subs);
});
it('should work with hot-empty and hot-single', function () {
var values = {
a: 1,
b: 2,
c: 3,
r: 1 + 3 //a + c
};
var e1 = hot('-a-^-|', values);
var e1subs = '^ !';
var e2 = hot('-b-^-c-|', values);
var e2subs = '^ !';
var expected = '----|';
var result = Observable.combineLatest(e1, e2, function (x, y) { return x + y; });
expectObservable(result).toBe(expected, values);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
expectSubscriptions(e2.subscriptions).toBe(e2subs);
});
it('should work with hot-single and hot-empty', function () {
var values = {
a: 1, b: 2, c: 3
};
var e1 = hot('-a-^-|', values);
var e1subs = '^ !';
var e2 = hot('-b-^-c-|', values);
var e2subs = '^ !';
var expected = '----|';
var result = Observable.combineLatest(e2, e1, function (x, y) { return x + y; });
expectObservable(result).toBe(expected, values);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
expectSubscriptions(e2.subscriptions).toBe(e2subs);
});
it('should work with hot-single and never', function () {
var values = {
a: 1
};
var e1 = hot('-a-^-|', values);
var e1subs = '^ !';
var e2 = hot('------', values); //never
var e2subs = '^ ';
var expected = '-'; //never
var result = Observable.combineLatest(e1, e2, function (x, y) { return x + y; });
expectObservable(result).toBe(expected, values);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
expectSubscriptions(e2.subscriptions).toBe(e2subs);
});
it('should work with never and hot-single', function () {
var values = {
a: 1, b: 2
};
var e1 = hot('--------', values); //never
var e1subs = '^ ';
var e2 = hot('-a-^-b-|', values);
var e2subs = '^ !';
var expected = '-----'; //never
var result = Observable.combineLatest(e1, e2, function (x, y) { return x + y; });
expectObservable(result).toBe(expected, values);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
expectSubscriptions(e2.subscriptions).toBe(e2subs);
});
it('should work with hot and hot', function () {
var e1 = hot('--a--^--b--c--|', { a: 'a', b: 'b', c: 'c' });
var e1subs = '^ !';
var e2 = hot('---e-^---f--g--|', { e: 'e', f: 'f', g: 'g' });
var e2subs = '^ !';
var expected = '----x-yz--|';
var result = Observable.combineLatest(e1, e2, function (x, y) { return x + y; });
expectObservable(result).toBe(expected, { x: 'bf', y: 'cf', z: 'cg' });
expectSubscriptions(e1.subscriptions).toBe(e1subs);
expectSubscriptions(e2.subscriptions).toBe(e2subs);
});
it('should work with empty and error', function () {
var e1 = hot('----------|'); //empty
var e1subs = '^ !';
var e2 = hot('------#', null, 'shazbot!'); //error
var e2subs = '^ !';
var expected = '------#';
var result = Observable.combineLatest(e1, e2, function (x, y) { return x + y; });
expectObservable(result).toBe(expected, null, 'shazbot!');
expectSubscriptions(e1.subscriptions).toBe(e1subs);
expectSubscriptions(e2.subscriptions).toBe(e2subs);
});
it('should work with error and empty', function () {
var e1 = hot('--^---#', null, 'too bad, honk'); //error
var e1subs = '^ !';
var e2 = hot('--^--------|'); //empty
var e2subs = '^ !';
var expected = '----#';
var result = Observable.combineLatest(e1, e2, function (x, y) { return x + y; });
expectObservable(result).toBe(expected, null, 'too bad, honk');
expectSubscriptions(e1.subscriptions).toBe(e1subs);
expectSubscriptions(e2.subscriptions).toBe(e2subs);
});
it('should work with hot and throw', function () {
var e1 = hot('-a-^--b--c--|', { a: 1, b: 2, c: 3 });
var e1subs = '^ !';
var e2 = hot('---^-#', null, 'bazinga');
var e2subs = '^ !';
var expected = '--#';
var result = Observable.combineLatest(e1, e2, function (x, y) { return x + y; });
expectObservable(result).toBe(expected, null, 'bazinga');
expectSubscriptions(e1.subscriptions).toBe(e1subs);
expectSubscriptions(e2.subscriptions).toBe(e2subs);
});
it('should work with throw and hot', function () {
var e1 = hot('---^-#', null, 'bazinga');
var e1subs = '^ !';
var e2 = hot('-a-^--b--c--|', { a: 1, b: 2, c: 3 });
var e2subs = '^ !';
var expected = '--#';
var result = Observable.combineLatest(e1, e2, function (x, y) { return x + y; });
expectObservable(result).toBe(expected, null, 'bazinga');
expectSubscriptions(e1.subscriptions).toBe(e1subs);
expectSubscriptions(e2.subscriptions).toBe(e2subs);
});
it('should work with throw and throw', function () {
var e1 = hot('---^----#', null, 'jenga');
var e1subs = '^ !';
var e2 = hot('---^-#', null, 'bazinga');
var e2subs = '^ !';
var expected = '--#';
var result = Observable.combineLatest(e1, e2, function (x, y) { return x + y; });
expectObservable(result).toBe(expected, null, 'bazinga');
expectSubscriptions(e1.subscriptions).toBe(e1subs);
expectSubscriptions(e2.subscriptions).toBe(e2subs);
});
it('should work with error and throw', function () {
var e1 = hot('-a-^--b--#', { a: 1, b: 2 }, 'wokka wokka');
var e1subs = '^ !';
var e2 = hot('---^-#', null, 'flurp');
var e2subs = '^ !';
var expected = '--#';
var result = Observable.combineLatest(e1, e2, function (x, y) { return x + y; });
expectObservable(result).toBe(expected, null, 'flurp');
expectSubscriptions(e1.subscriptions).toBe(e1subs);
expectSubscriptions(e2.subscriptions).toBe(e2subs);
});
it('should work with throw and error', function () {
var e1 = hot('---^-#', null, 'flurp');
var e1subs = '^ !';
var e2 = hot('-a-^--b--#', { a: 1, b: 2 }, 'wokka wokka');
var e2subs = '^ !';
var expected = '--#';
var result = Observable.combineLatest(e1, e2, function (x, y) { return x + y; });
expectObservable(result).toBe(expected, null, 'flurp');
expectSubscriptions(e1.subscriptions).toBe(e1subs);
expectSubscriptions(e2.subscriptions).toBe(e2subs);
});
it('should work with never and throw', function () {
var e1 = hot('---^-----------');
var e1subs = '^ !';
var e2 = hot('---^-----#', null, 'wokka wokka');
var e2subs = '^ !';
var expected = '------#';
var result = Observable.combineLatest(e1, e2, function (x, y) { return x + y; });
expectObservable(result).toBe(expected, null, 'wokka wokka');
expectSubscriptions(e1.subscriptions).toBe(e1subs);
expectSubscriptions(e2.subscriptions).toBe(e2subs);
});
it('should work with throw and never', function () {
var e1 = hot('---^----#', null, 'wokka wokka');
var e1subs = '^ !';
var e2 = hot('---^-----------');
var e2subs = '^ !';
var expected = '-----#';
var result = Observable.combineLatest(e1, e2, function (x, y) { return x + y; });
expectObservable(result).toBe(expected, null, 'wokka wokka');
expectSubscriptions(e1.subscriptions).toBe(e1subs);
expectSubscriptions(e2.subscriptions).toBe(e2subs);
});
it('should work with some and throw', function () {
var e1 = hot('---^----a---b--|', { a: 1, b: 2 });
var e1subs = '^ !';
var e2 = hot('---^--#', null, 'wokka wokka');
var e2subs = '^ !';
var expected = '---#';
var result = Observable.combineLatest(e1, e2, function (x, y) { return x + y; });
expectObservable(result).toBe(expected, { a: 1, b: 2 }, 'wokka wokka');
expectSubscriptions(e1.subscriptions).toBe(e1subs);
expectSubscriptions(e2.subscriptions).toBe(e2subs);
});
it('should work with throw and some', function () {
var e1 = hot('---^--#', null, 'wokka wokka');
var e1subs = '^ !';
var e2 = hot('---^----a---b--|', { a: 1, b: 2 });
var e2subs = '^ !';
var expected = '---#';
var result = Observable.combineLatest(e1, e2, function (x, y) { return x + y; });
expectObservable(result).toBe(expected, { a: 1, b: 2 }, 'wokka wokka');
expectSubscriptions(e1.subscriptions).toBe(e1subs);
expectSubscriptions(e2.subscriptions).toBe(e2subs);
});
it('should handle throw after complete left', function () {
var left = hot('--a--^--b---|', { a: 1, b: 2 });
var leftSubs = '^ !';
var right = hot('-----^--------#', null, 'bad things');
var rightSubs = '^ !';
var expected = '---------#';
var result = Observable.combineLatest(left, right, function (x, y) { return x + y; });
expectObservable(result).toBe(expected, null, 'bad things');
expectSubscriptions(left.subscriptions).toBe(leftSubs);
expectSubscriptions(right.subscriptions).toBe(rightSubs);
});
it('should handle throw after complete right', function () {
var left = hot('-----^--------#', null, 'bad things');
var leftSubs = '^ !';
var right = hot('--a--^--b---|', { a: 1, b: 2 });
var rightSubs = '^ !';
var expected = '---------#';
var result = Observable.combineLatest(left, right, function (x, y) { return x + y; });
expectObservable(result).toBe(expected, null, 'bad things');
expectSubscriptions(left.subscriptions).toBe(leftSubs);
expectSubscriptions(right.subscriptions).toBe(rightSubs);
});
it('should handle interleaved with tail', function () {
var e1 = hot('-a--^--b---c---|', { a: 'a', b: 'b', c: 'c' });
var e1subs = '^ !';
var e2 = hot('--d-^----e---f--|', { d: 'd', e: 'e', f: 'f' });
var e2subs = '^ !';
var expected = '-----x-y-z--|';
var result = Observable.combineLatest(e1, e2, function (x, y) { return x + y; });
expectObservable(result).toBe(expected, { x: 'be', y: 'ce', z: 'cf' });
expectSubscriptions(e1.subscriptions).toBe(e1subs);
expectSubscriptions(e2.subscriptions).toBe(e2subs);
});
it('should handle two consecutive hot observables', function () {
var e1 = hot('--a--^--b--c--|', { a: 'a', b: 'b', c: 'c' });
var e1subs = '^ !';
var e2 = hot('-----^----------d--e--f--|', { d: 'd', e: 'e', f: 'f' });
var e2subs = '^ !';
var expected = '-----------x--y--z--|';
var result = Observable.combineLatest(e1, e2, function (x, y) { return x + y; });
expectObservable(result).toBe(expected, { x: 'cd', y: 'ce', z: 'cf' });
expectSubscriptions(e1.subscriptions).toBe(e1subs);
expectSubscriptions(e2.subscriptions).toBe(e2subs);
});
it('should handle two consecutive hot observables with error left', function () {
var left = hot('--a--^--b--c--#', { a: 'a', b: 'b', c: 'c' }, 'jenga');
var leftSubs = '^ !';
var right = hot('-----^----------d--e--f--|', { d: 'd', e: 'e', f: 'f' });
var rightSubs = '^ !';
var expected = '---------#';
var result = Observable.combineLatest(left, right, function (x, y) { return x + y; });
expectObservable(result).toBe(expected, null, 'jenga');
expectSubscriptions(left.subscriptions).toBe(leftSubs);
expectSubscriptions(right.subscriptions).toBe(rightSubs);
});
it('should handle two consecutive hot observables with error right', function () {
var left = hot('--a--^--b--c--|', { a: 'a', b: 'b', c: 'c' });
var leftSubs = '^ !';
var right = hot('-----^----------d--e--f--#', { d: 'd', e: 'e', f: 'f' }, 'dun dun dun');
var rightSubs = '^ !';
var expected = '-----------x--y--z--#';
var result = Observable.combineLatest(left, right, function (x, y) { return x + y; });
expectObservable(result).toBe(expected, { x: 'cd', y: 'ce', z: 'cf' }, 'dun dun dun');
expectSubscriptions(left.subscriptions).toBe(leftSubs);
expectSubscriptions(right.subscriptions).toBe(rightSubs);
});
it('should handle selector throwing', function () {
var e1 = hot('--a--^--b--|', { a: 1, b: 2 });
var e1subs = '^ !';
var e2 = hot('--c--^--d--|', { c: 3, d: 4 });
var e2subs = '^ !';
var expected = '---#';
var result = Observable.combineLatest(e1, e2, function (x, y) { throw 'ha ha ' + x + ', ' + y; });
expectObservable(result).toBe(expected, null, 'ha ha 2, 4');
expectSubscriptions(e1.subscriptions).toBe(e1subs);
expectSubscriptions(e2.subscriptions).toBe(e2subs);
});
it('should allow unsubscribing early and explicitly', function () {
var e1 = hot('--a--^--b--c---d-| ');
var e1subs = '^ ! ';
var e2 = hot('---e-^---f--g---h-|');
var e2subs = '^ ! ';
var expected = '----x-yz-- ';
var unsub = ' ! ';
var values = { x: 'bf', y: 'cf', z: 'cg' };
var result = Observable.combineLatest(e1, e2, function (x, y) { return x + y; });
expectObservable(result, unsub).toBe(expected, values);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
expectSubscriptions(e2.subscriptions).toBe(e2subs);
});
it('should not break unsubscription chains when unsubscribed explicitly', function () {
var e1 = hot('--a--^--b--c---d-| ');
var e1subs = '^ ! ';
var e2 = hot('---e-^---f--g---h-|');
var e2subs = '^ ! ';
var expected = '----x-yz-- ';
var unsub = ' ! ';
var values = { x: 'bf', y: 'cf', z: 'cg' };
var result = Observable.combineLatest(e1.mergeMap(function (x) { return Observable.of(x); }), e2.mergeMap(function (x) { return Observable.of(x); }), function (x, y) { return x + y; }).mergeMap(function (x) { return Observable.of(x); });
expectObservable(result, unsub).toBe(expected, values);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
expectSubscriptions(e2.subscriptions).toBe(e2subs);
});
it('should support promises', function () {
type(function () {
/* tslint:disable:no-unused-variable */
var a;
var b;
var c;
var o1 = Observable.combineLatest(a, b, c);
var o2 = Observable.combineLatest(a, b, c, function (aa, bb, cc) { return !!aa && !!bb && cc; });
/* tslint:enable:no-unused-variable */
});
});
it('should support observables', function () {
type(function () {
/* tslint:disable:no-unused-variable */
var a;
var b;
var c;
var o1 = Observable.combineLatest(a, b, c);
var o2 = Observable.combineLatest(a, b, c, function (aa, bb, cc) { return !!aa && !!bb && cc; });
/* tslint:enable:no-unused-variable */
});
});
it('should support mixed observables and promises', function () {
type(function () {
/* tslint:disable:no-unused-variable */
var a;
var b;
var c;
var d;
var o1 = Observable.combineLatest(a, b, c, d);
var o2 = Observable.combineLatest(a, b, c, d, function (aa, bb, cc, dd) { return !!aa && !!bb && cc && !!dd.length; });
/* tslint:enable:no-unused-variable */
});
});
it('should support arrays of promises', function () {
type(function () {
/* tslint:disable:no-unused-variable */
var a;
var o1 = Observable.combineLatest(a);
var o2 = Observable.combineLatest.apply(Observable, a);
var o3 = Observable.combineLatest(a, function () {
var x = [];
for (var _i = 0; _i < arguments.length; _i++) {
x[_i - 0] = arguments[_i];
}
return x.length;
});
/* tslint:enable:no-unused-variable */
});
});
it('should support arrays of observables', function () {
type(function () {
/* tslint:disable:no-unused-variable */
var a;
var o1 = Observable.combineLatest(a);
var o2 = Observable.combineLatest.apply(Observable, a);
var o3 = Observable.combineLatest(a, function () {
var x = [];
for (var _i = 0; _i < arguments.length; _i++) {
x[_i - 0] = arguments[_i];
}
return x.length;
});
/* tslint:enable:no-unused-variable */
});
});
it('should return Array<T> when given a single promise', function () {
type(function () {
/* tslint:disable:no-unused-variable */
var a;
var o1 = Observable.combineLatest(a);
/* tslint:enable:no-unused-variable */
});
});
it('should return Array<T> when given a single observable', function () {
type(function () {
/* tslint:disable:no-unused-variable */
var a;
var o1 = Observable.combineLatest(a);
/* tslint:enable:no-unused-variable */
});
});
});
//# sourceMappingURL=combineLatest-spec.js.map</code></pre>
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