@reactivex/rxjs
Version:
Reactive Extensions for modern JavaScript
171 lines • 7.76 kB
JavaScript
"use strict";
/** @test {delayWhen} */
describe('Observable.prototype.delayWhen', function () {
asDiagram('delayWhen(durationSelector)')('should delay by duration selector', function () {
var e1 = hot('---a---b---c--|');
var expected = '-----a------c----(b|)';
var subs = '^ !';
var selector = [cold('--x--|'),
cold('----------(x|)'),
cold('-x--|')];
var selectorSubs = [' ^ ! ',
' ^ !',
' ^! '];
var idx = 0;
function durationSelector(x) {
return selector[idx++];
}
var result = e1.delayWhen(durationSelector);
expectObservable(result).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(subs);
expectSubscriptions(selector[0].subscriptions).toBe(selectorSubs[0]);
expectSubscriptions(selector[1].subscriptions).toBe(selectorSubs[1]);
expectSubscriptions(selector[2].subscriptions).toBe(selectorSubs[2]);
});
it('should delay by selector', function () {
var e1 = hot('--a--b--|');
var expected = '---a--b-|';
var subs = '^ !';
var selector = cold('-x--|');
var selectorSubs = [' ^! ',
' ^! '];
var result = e1.delayWhen(function (x) { return selector; });
expectObservable(result).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(subs);
expectSubscriptions(selector.subscriptions).toBe(selectorSubs);
});
it('should raise error if source raises error', function () {
var e1 = hot('--a--#');
var expected = '---a-#';
var subs = '^ !';
var selector = cold('-x--|');
var selectorSubs = ' ^! ';
var result = e1.delayWhen(function (x) { return selector; });
expectObservable(result).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(subs);
expectSubscriptions(selector.subscriptions).toBe(selectorSubs);
});
it('should raise error if selector raises error', function () {
var e1 = hot('--a--b--|');
var expected = '---#';
var subs = '^ !';
var selector = cold('-#');
var selectorSubs = ' ^! ';
var result = e1.delayWhen(function (x) { return selector; });
expectObservable(result).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(subs);
expectSubscriptions(selector.subscriptions).toBe(selectorSubs);
});
it('should delay by selector and completes after value emits', function () {
var e1 = hot('--a--b--|');
var expected = '---------a--(b|)';
var subs = '^ !';
var selector = cold('-------x--|');
var selectorSubs = [' ^ !',
' ^ !'];
var result = e1.delayWhen(function (x) { return selector; });
expectObservable(result).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(subs);
expectSubscriptions(selector.subscriptions).toBe(selectorSubs);
});
it('should delay by selector completes if selector does not emits', function () {
var e1 = hot('--a--b--|');
var expected = '------a--(b|)';
var subs = '^ !';
var selector = cold('----|');
var selectorSubs = [' ^ !',
' ^ !'];
var result = e1.delayWhen(function (x) { return selector; });
expectObservable(result).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(subs);
expectSubscriptions(selector.subscriptions).toBe(selectorSubs);
});
it('should not emit if selector never emits', function () {
var e1 = hot('--a--b--|');
var expected = '-';
var subs = '^ ';
var selector = cold('-');
var selectorSubs = [' ^ ',
' ^ '];
var result = e1.delayWhen(function (x) { return selector; });
expectObservable(result).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(subs);
expectSubscriptions(selector.subscriptions).toBe(selectorSubs);
});
it('should delay by first value from selector', function () {
var e1 = hot('--a--b--|');
var expected = '------a--(b|)';
var subs = '^ !';
var selector = cold('----x--y--|');
var selectorSubs = [' ^ !',
' ^ !'];
var result = e1.delayWhen(function (x) { return selector; });
expectObservable(result).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(subs);
expectSubscriptions(selector.subscriptions).toBe(selectorSubs);
});
it('should delay by selector does not completes', function () {
var e1 = hot('--a--b--|');
var expected = '------a--(b|)';
var subs = '^ !';
var selector = cold('----x-----y---');
var selectorSubs = [' ^ !',
' ^ !'];
var result = e1.delayWhen(function (x) { return selector; });
expectObservable(result).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(subs);
expectSubscriptions(selector.subscriptions).toBe(selectorSubs);
});
it('should raise error if selector throws', function () {
var e1 = hot('--a--b--|');
var expected = '--#';
var subs = '^ !';
var err = new Error('error');
var result = e1.delayWhen((function (x) { throw err; }));
expectObservable(result).toBe(expected, null, err);
expectSubscriptions(e1.subscriptions).toBe(subs);
});
it('should start subscription when subscription delay emits', function () {
var e1 = hot('-----a---b---|');
var expected = ' -----a---b-|';
var subs = ' ^ !';
var selector = cold('--x--|');
var selectorSubs = [' ^ !',
' ^ !'];
var subDelay = cold('--x--|');
var subDelaySub = '^ !';
var result = e1.delayWhen(function (x) { return selector; }, subDelay);
expectObservable(result).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(subs);
expectSubscriptions(selector.subscriptions).toBe(selectorSubs);
expectSubscriptions(subDelay.subscriptions).toBe(subDelaySub);
});
it('should start subscription when subscription delay completes without emit value', function () {
var e1 = hot('-----a---b---|');
var expected = ' -----a---b-|';
var subs = ' ^ !';
var selector = cold('--x--|');
var selectorSubs = [' ^ !',
' ^ !'];
var subDelay = cold('--|');
var subDelaySub = '^ !';
var result = e1.delayWhen(function (x) { return selector; }, subDelay);
expectObservable(result).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(subs);
expectSubscriptions(selector.subscriptions).toBe(selectorSubs);
expectSubscriptions(subDelay.subscriptions).toBe(subDelaySub);
});
it('should raise error when subscription delay raises error', function () {
var e1 = hot('-----a---b---|');
var expected = ' # ';
var selector = cold('--x--|');
var subDelay = cold('---#');
var subDelaySub = '^ !';
var result = e1.delayWhen(function (x) { return selector; }, subDelay);
expectObservable(result).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe([]);
expectSubscriptions(selector.subscriptions).toBe([]);
expectSubscriptions(subDelay.subscriptions).toBe(subDelaySub);
});
});
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