spec-js/operators/partition-spec.js
"use strict";
var chai_1 = require('chai');
var Rx = require('../../dist/cjs/Rx');
var Observable = Rx.Observable;
/** @test {partition} */
describe('Observable.prototype.partition', function () {
function expectObservableArray(result, expected) {
for (var idx = 0; idx < result.length; idx++) {
expectObservable(result[idx]).toBe(expected[idx]);
}
}
asDiagram('partition(x => x % 2 === 1)')('should partition an observable of ' +
'integers into even and odd', function () {
var e1 = hot('--1-2---3------4--5---6--|');
var e1subs = '^ !';
var expected = ['--1-----3---------5------|',
'----2----------4------6--|'];
var result = e1.partition(function (x) { return x % 2 === 1; });
expectObservableArray(result, expected);
expectSubscriptions(e1.subscriptions).toBe([e1subs, e1subs]);
});
it('should partition an observable into two using a predicate', function () {
var e1 = hot('--a-b---a------d--a---c--|');
var e1subs = '^ !';
var expected = ['--a-----a---------a------|',
'----b----------d------c--|'];
function predicate(x) {
return x === 'a';
}
expectObservableArray(e1.partition(predicate), expected);
expectSubscriptions(e1.subscriptions).toBe([e1subs, e1subs]);
});
it('should partition an observable into two using a predicate and thisArg', function () {
var e1 = hot('--a-b---a------d--a---c--|');
var e1subs = '^ !';
var expected = ['--a-----a---------a------|',
'----b----------d------c--|'];
function predicate(x) {
return x === this.value;
}
expectObservableArray(e1.partition(predicate, { value: 'a' }), expected);
expectSubscriptions(e1.subscriptions).toBe([e1subs, e1subs]);
});
it('should pass errors to both returned observables', function () {
var e1 = hot('--a-b---#');
var e1subs = '^ !';
var expected = ['--a-----#',
'----b---#'];
function predicate(x) {
return x === 'a';
}
expectObservableArray(e1.partition(predicate), expected);
expectSubscriptions(e1.subscriptions).toBe([e1subs, e1subs]);
});
it('should pass errors to both returned observables if source throws', function () {
var e1 = cold('#');
var e1subs = '(^!)';
var expected = ['#',
'#'];
function predicate(x) {
return x === 'a';
}
expectObservableArray(e1.partition(predicate), expected);
expectSubscriptions(e1.subscriptions).toBe([e1subs, e1subs]);
});
it('should pass errors to both returned observables if predicate throws', function () {
var e1 = hot('--a-b--a--|');
var e1subs = '^ ! ';
var expected = ['--a----# ',
'----b--# '];
var index = 0;
var error = 'error';
function predicate(x) {
var match = x === 'a';
if (match && index++ > 1) {
throw error;
}
return match;
}
expectObservableArray(e1.partition(predicate), expected);
expectSubscriptions(e1.subscriptions).toBe([e1subs, e1subs]);
});
it('should partition empty observable if source does not emits', function () {
var e1 = hot('----|');
var e1subs = '^ !';
var expected = ['----|',
'----|'];
function predicate(x) {
return x === 'x';
}
expectObservableArray(e1.partition(predicate), expected);
expectSubscriptions(e1.subscriptions).toBe([e1subs, e1subs]);
});
it('should partition empty observable if source is empty', function () {
var e1 = cold('|');
var e1subs = '(^!)';
var expected = ['|',
'|'];
function predicate(x) {
return x === 'x';
}
expectObservableArray(e1.partition(predicate), expected);
expectSubscriptions(e1.subscriptions).toBe([e1subs, e1subs]);
});
it('should partition if source emits single elements', function () {
var e1 = hot('--a--|');
var e1subs = '^ !';
var expected = ['--a--|',
'-----|'];
function predicate(x) {
return x === 'a';
}
expectObservableArray(e1.partition(predicate), expected);
expectSubscriptions(e1.subscriptions).toBe([e1subs, e1subs]);
});
it('should partition if predicate matches all of source elements', function () {
var e1 = hot('--a--a--a--a--a--a--a--|');
var e1subs = '^ !';
var expected = ['--a--a--a--a--a--a--a--|',
'-----------------------|'];
function predicate(x) {
return x === 'a';
}
expectObservableArray(e1.partition(predicate), expected);
expectSubscriptions(e1.subscriptions).toBe([e1subs, e1subs]);
});
it('should partition if predicate does not match all of source elements', function () {
var e1 = hot('--b--b--b--b--b--b--b--|');
var e1subs = '^ !';
var expected = ['-----------------------|',
'--b--b--b--b--b--b--b--|'];
function predicate(x) {
return x === 'a';
}
expectObservableArray(e1.partition(predicate), expected);
expectSubscriptions(e1.subscriptions).toBe([e1subs, e1subs]);
});
it('should partition to infinite observable if source does not completes', function () {
var e1 = hot('--a-b---a------d----');
var e1subs = '^ ';
var expected = ['--a-----a-----------',
'----b----------d----'];
function predicate(x) {
return x === 'a';
}
expectObservableArray(e1.partition(predicate), expected);
expectSubscriptions(e1.subscriptions).toBe([e1subs, e1subs]);
});
it('should partition to infinite observable if source never completes', function () {
var e1 = cold('-');
var e1subs = '^';
var expected = ['-',
'-'];
function predicate(x) {
return x === 'a';
}
expectObservableArray(e1.partition(predicate), expected);
expectSubscriptions(e1.subscriptions).toBe([e1subs, e1subs]);
});
it('should partition into two observable with early unsubscription', function () {
var e1 = hot('--a-b---a------d-|');
var unsub = ' ! ';
var e1subs = '^ ! ';
var expected = ['--a----- ',
'----b--- '];
function predicate(x) {
return x === 'a';
}
var result = e1.partition(predicate);
for (var idx = 0; idx < result.length; idx++) {
expectObservable(result[idx], unsub).toBe(expected[idx]);
}
expectSubscriptions(e1.subscriptions).toBe([e1subs, e1subs]);
});
it('should not break unsubscription chains when result is unsubscribed explicitly', function () {
var e1 = hot('--a-b---a------d-|');
var e1subs = '^ ! ';
var expected = ['--a----- ',
'----b--- '];
var unsub = ' ! ';
var result = e1
.mergeMap(function (x) { return Observable.of(x); })
.partition(function (x) { return x === 'a'; })
.map(function (observable) {
return observable.mergeMap(function (x) { return Observable.of(x); });
});
expectObservable(result[0], unsub).toBe(expected[0]);
expectObservable(result[1], unsub).toBe(expected[1]);
expectSubscriptions(e1.subscriptions).toBe([e1subs, e1subs]);
});
it('should throw without predicate', function () {
var e1 = hot('--a-b---a------d----');
chai_1.expect(e1.partition).to.throw();
});
it('should accept thisArg', function () {
var thisArg = {};
Observable.of(1).partition(function (value) {
chai_1.expect(this).to.deep.equal(thisArg);
return true;
}, thisArg)
.forEach(function (observable) { return observable.subscribe(); });
});
});
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