@reactivex/rxjs
Version:
Reactive Extensions for modern JavaScript
288 lines • 15 kB
JavaScript
"use strict";
var Rx = require('../../dist/cjs/Rx');
var Observable = Rx.Observable;
/** @test {windowWhen} */
describe('Observable.prototype.windowWhen', function () {
asDiagram('windowWhen')('should emit windows that close and reopen', function () {
var e1 = hot('--a--^--b--c--d--e--f--g--h--i--|');
var e1subs = '^ !';
var e2 = cold('-----------| ');
var e2subs = ['^ ! ',
' ^ ! ',
' ^ !'];
var a = cold('---b--c--d-| ');
var b = cold('-e--f--g--h| ');
var c = cold('--i--|');
var expected = 'a----------b----------c----|';
var values = { a: a, b: b, c: c };
var source = e1.windowWhen(function () { return e2; });
expectObservable(source).toBe(expected, values);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
expectSubscriptions(e2.subscriptions).toBe(e2subs);
});
it('should emit windows using constying cold closings', function () {
var e1 = hot('--a--^---b---c---d---e---f---g---h------| ');
var e1subs = '^ ! ';
var closings = [
cold('-----------------s--| '),
cold('-----(s|) '),
cold('---------------(s|)')];
var closeSubs = ['^ ! ',
' ^ ! ',
' ^ ! '];
var expected = 'x----------------y----z------------| ';
var x = cold('----b---c---d---e| ');
var y = cold('---f-| ');
var z = cold('--g---h------| ');
var values = { x: x, y: y, z: z };
var i = 0;
var result = e1.windowWhen(function () { return closings[i++]; });
expectObservable(result).toBe(expected, values);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
expectSubscriptions(closings[0].subscriptions).toBe(closeSubs[0]);
expectSubscriptions(closings[1].subscriptions).toBe(closeSubs[1]);
expectSubscriptions(closings[2].subscriptions).toBe(closeSubs[2]);
});
it('should emit windows using constying hot closings', function () {
var e1 = hot('--a--^---b---c---d---e---f---g---h------| ');
var subs = '^ ! ';
var closings = [
{ obs: hot('-1--^----------------s-| '),
sub: '^ ! ' },
{ obs: hot('-----3----4-----------(s|) '),
sub: ' ^ ! ' },
{ obs: hot('-------3----4-------5----------------s|'),
sub: ' ^ ! ' }]; // eslint-disable-line key-spacing
var expected = 'x----------------y----z------------| ';
var x = cold('----b---c---d---e| ');
var y = cold('---f-| ');
var z = cold('--g---h------| ');
var values = { x: x, y: y, z: z };
var i = 0;
var result = e1.windowWhen(function () { return closings[i++].obs; });
expectObservable(result).toBe(expected, values);
expectSubscriptions(e1.subscriptions).toBe(subs);
expectSubscriptions(closings[0].obs.subscriptions).toBe(closings[0].sub);
expectSubscriptions(closings[1].obs.subscriptions).toBe(closings[1].sub);
expectSubscriptions(closings[2].obs.subscriptions).toBe(closings[2].sub);
});
it('should emit windows using constying empty delayed closings', function () {
var e1 = hot('--a--^---b---c---d---e---f---g---h------| ');
var e1subs = '^ ! ';
var closings = [
cold('-----------------| '),
cold('-----| '),
cold('---------------|')];
var closeSubs = ['^ ! ',
' ^ ! ',
' ^ ! '];
var expected = 'x----------------y----z------------| ';
var x = cold('----b---c---d---e| ');
var y = cold('---f-| ');
var z = cold('--g---h------| ');
var values = { x: x, y: y, z: z };
var i = 0;
var result = e1.windowWhen(function () { return closings[i++]; });
expectObservable(result).toBe(expected, values);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
expectSubscriptions(closings[0].subscriptions).toBe(closeSubs[0]);
expectSubscriptions(closings[1].subscriptions).toBe(closeSubs[1]);
expectSubscriptions(closings[2].subscriptions).toBe(closeSubs[2]);
});
it('should emit windows using constying cold closings, outer unsubscribed early', function () {
var e1 = hot('--a--^---b---c---d---e---f---g---h------| ');
var e1subs = '^ ! ';
var closings = [
cold('-----------------s--| '),
cold('---------(s|) ')];
var closeSubs = ['^ ! ',
' ^ ! '];
var expected = 'x----------------y---- ';
var x = cold('----b---c---d---e| ');
var y = cold('---f- ');
var unsub = ' ! ';
var values = { x: x, y: y };
var i = 0;
var result = e1.windowWhen(function () { return closings[i++]; });
expectObservable(result, unsub).toBe(expected, values);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
expectSubscriptions(closings[0].subscriptions).toBe(closeSubs[0]);
expectSubscriptions(closings[1].subscriptions).toBe(closeSubs[1]);
});
it('should not break unsubscription chain when unsubscribed explicitly', function () {
var e1 = hot('--a--^---b---c---d---e---f---g---h------| ');
var e1subs = '^ ! ';
var closings = [
cold('-----------------s--| '),
cold('---------(s|) ')];
var closeSubs = ['^ ! ',
' ^ ! '];
var expected = 'x----------------y---- ';
var x = cold('----b---c---d---e| ');
var y = cold('---f- ');
var unsub = ' ! ';
var values = { x: x, y: y };
var i = 0;
var result = e1
.mergeMap(function (x) { return Observable.of(x); })
.windowWhen(function () { return closings[i++]; })
.mergeMap(function (x) { return Observable.of(x); });
expectObservable(result, unsub).toBe(expected, values);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
expectSubscriptions(closings[0].subscriptions).toBe(closeSubs[0]);
expectSubscriptions(closings[1].subscriptions).toBe(closeSubs[1]);
});
it('should propagate error thrown from closingSelector', function () {
var e1 = hot('--a--^---b---c---d---e---f---g---h------| ');
var e1subs = '^ ! ';
var closings = [
cold('-----------------s--| '),
cold('-----(s|) '),
cold('---------------(s|)')];
var closeSubs = ['^ ! '];
var expected = 'x----------------(y#) ';
var x = cold('----b---c---d---e| ');
var y = cold('# ');
var values = { x: x, y: y };
var i = 0;
var result = e1.windowWhen(function () {
if (i === 1) {
throw 'error';
}
return closings[i++];
});
expectObservable(result).toBe(expected, values);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
expectSubscriptions(closings[0].subscriptions).toBe(closeSubs[0]);
});
it('should propagate error emitted from a closing', function () {
var e1 = hot('--a--^---b---c---d---e---f---g---h------| ');
var e1subs = '^ ! ';
var closings = [
cold('-----------------s--| '),
cold('# ')];
var closeSubs = ['^ ! ',
' (^!) '];
var expected = 'x----------------(y#) ';
var x = cold('----b---c---d---e| ');
var y = cold('# ');
var values = { x: x, y: y };
var i = 0;
var result = e1.windowWhen(function () { return closings[i++]; });
expectObservable(result).toBe(expected, values);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
expectSubscriptions(closings[0].subscriptions).toBe(closeSubs[0]);
expectSubscriptions(closings[1].subscriptions).toBe(closeSubs[1]);
});
it('should propagate error emitted late from a closing', function () {
var e1 = hot('--a--^---b---c---d---e---f---g---h------| ');
var e1subs = '^ ! ';
var closings = [
cold('-----------------s--| '),
cold('-----# ')];
var closeSubs = ['^ ! ',
' ^ ! '];
var expected = 'x----------------y----# ';
var x = cold('----b---c---d---e| ');
var y = cold('---f-# ');
var values = { x: x, y: y };
var i = 0;
var result = e1.windowWhen(function () { return closings[i++]; });
expectObservable(result).toBe(expected, values);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
expectSubscriptions(closings[0].subscriptions).toBe(closeSubs[0]);
expectSubscriptions(closings[1].subscriptions).toBe(closeSubs[1]);
});
it('should propagate errors emitted from the source', function () {
var e1 = hot('--a--^---b---c---d---e---f-# ');
var e1subs = '^ ! ';
var closings = [
cold('-----------------s--| '),
cold('-------(s|) ')];
var closeSubs = ['^ ! ',
' ^ ! '];
var expected = 'x----------------y----# ';
var x = cold('----b---c---d---e| ');
var y = cold('---f-# ');
var values = { x: x, y: y };
var i = 0;
var result = e1.windowWhen(function () { return closings[i++]; });
expectObservable(result).toBe(expected, values);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
expectSubscriptions(closings[0].subscriptions).toBe(closeSubs[0]);
expectSubscriptions(closings[1].subscriptions).toBe(closeSubs[1]);
});
it('should handle empty source', function () {
var e1 = cold('|');
var e1subs = '(^!)';
var e2 = cold('-----c--|');
var e2subs = '(^!)';
var expected = '(w|)';
var values = { w: cold('|') };
var result = e1.windowWhen(function () { return e2; });
expectObservable(result).toBe(expected, values);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
expectSubscriptions(e2.subscriptions).toBe(e2subs);
});
it('should handle a never source', function () {
var e1 = cold('-');
var unsub = ' !';
var e1subs = '^ !';
var e2 = cold('-----c--|');
// -----c--|
// -----c--|
// -----c--|
var e2subs = ['^ ! ',
' ^ ! ',
' ^ ! ',
' ^ !'];
var win = cold('-----|');
var d = cold('---');
var expected = 'a----b----c----d--';
var values = { a: win, b: win, c: win, d: d };
var result = e1.windowWhen(function () { return e2; });
expectObservable(result, unsub).toBe(expected, values);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
expectSubscriptions(e2.subscriptions).toBe(e2subs);
});
it('should handle throw', function () {
var e1 = cold('#');
var e1subs = '(^!)';
var e2 = cold('-----c--|');
var e2subs = '(^!)';
var win = cold('#');
var expected = '(w#)';
var values = { w: win };
var result = e1.windowWhen(function () { return e2; });
expectObservable(result).toBe(expected, values);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
expectSubscriptions(e2.subscriptions).toBe(e2subs);
});
it('should handle a never closing Observable', function () {
var e1 = hot('--a--^---b---c---d---e---f---g---h------|');
var e1subs = '^ !';
var e2 = cold('-');
var e2subs = '^ !';
var expected = 'x----------------------------------|';
var x = cold('----b---c---d---e---f---g---h------|');
var values = { x: x };
var result = e1.windowWhen(function () { return e2; });
expectObservable(result).toBe(expected, values);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
expectSubscriptions(e2.subscriptions).toBe(e2subs);
});
it('should handle a throw closing Observable', function () {
var e1 = hot('--a--^---b---c---d---e---f---g---h------|');
var e1subs = '(^!) ';
var e2 = cold('#');
var e2subs = '(^!) ';
var expected = '(x#) ';
var x = cold('# ');
var values = { x: x };
var result = e1.windowWhen(function () { return e2; });
expectObservable(result).toBe(expected, values);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
expectSubscriptions(e2.subscriptions).toBe(e2subs);
});
});
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