@reactivex/rxjs
Version:
Reactive Extensions for modern JavaScript
118 lines • 4.94 kB
JavaScript
;
var Rx = require('../../dist/cjs/Rx');
var chai_1 = require('chai');
var Observable = Rx.Observable;
/** @test {bufferCount} */
describe('Observable.prototype.bufferCount', function () {
asDiagram('bufferCount(3,2)')('should emit buffers at intervals', function () {
var values = {
v: ['a', 'b', 'c'],
w: ['c', 'd', 'e'],
x: ['e', 'f', 'g'],
y: ['g', 'h', 'i'],
z: ['i']
};
var e1 = hot('--a--b--c--d--e--f--g--h--i--|');
var expected = '--------v-----w-----x-----y--(z|)';
expectObservable(e1.bufferCount(3, 2)).toBe(expected, values);
});
it('should emit buffers at buffersize of intervals if not specified', function () {
var values = {
x: ['a', 'b'],
y: ['c', 'd'],
z: ['e', 'f']
};
var e1 = hot('--a--b--c--d--e--f--|');
var expected = '-----x-----y-----z--|';
expectObservable(e1.bufferCount(2)).toBe(expected, values);
});
it('should buffer properly (issue #2062)', function () {
var item$ = new Rx.Subject();
var results = [];
item$
.bufferCount(3, 1)
.subscribe(function (value) {
results.push(value);
if (value.join() === '1,2,3') {
item$.next(4);
}
});
item$.next(1);
item$.next(2);
item$.next(3);
chai_1.expect(results).to.deep.equal([[1, 2, 3], [2, 3, 4]]);
});
it('should emit partial buffers if source completes before reaching specified buffer count', function () {
var e1 = hot('--a--b--c--d--|');
var expected = '--------------(x|)';
expectObservable(e1.bufferCount(5)).toBe(expected, { x: ['a', 'b', 'c', 'd'] });
});
it('should emit full buffer then last partial buffer if source completes', function () {
var e1 = hot('--a^-b--c--d--e--|');
var e1subs = '^ !';
var expected = '--------y-----(z|)';
expectObservable(e1.bufferCount(3)).toBe(expected, { y: ['b', 'c', 'd'], z: ['e'] });
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('should emit buffers at intervals, but stop when result is unsubscribed early', function () {
var values = {
v: ['a', 'b', 'c'],
w: ['c', 'd', 'e']
};
var e1 = hot('--a--b--c--d--e--f--g--h--i--|');
var unsub = ' ! ';
var subs = '^ ! ';
var expected = '--------v-----w---- ';
expectObservable(e1.bufferCount(3, 2), unsub).toBe(expected, values);
expectSubscriptions(e1.subscriptions).toBe(subs);
});
it('should not break unsubscription chains when result is unsubscribed explicitly', function () {
var values = {
v: ['a', 'b', 'c'],
w: ['c', 'd', 'e']
};
var e1 = hot('--a--b--c--d--e--f--g--h--i--|');
var subs = '^ ! ';
var expected = '--------v-----w---- ';
var unsub = ' ! ';
var result = e1
.mergeMap(function (x) { return Observable.of(x); })
.bufferCount(3, 2)
.mergeMap(function (x) { return Observable.of(x); });
expectObservable(result, unsub).toBe(expected, values);
expectSubscriptions(e1.subscriptions).toBe(subs);
});
it('should raise error if source raise error before reaching specified buffer count', function () {
var e1 = hot('--a--b--c--d--#');
var e1subs = '^ !';
var expected = '--------------#';
expectObservable(e1.bufferCount(5)).toBe(expected);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('should emit buffers with specified skip count when skip count is less than window count', function () {
var values = {
v: ['a', 'b', 'c'],
w: ['b', 'c', 'd'],
x: ['c', 'd', 'e'],
y: ['d', 'e'],
z: ['e']
};
var e1 = hot('--a--b--c--d--e--|');
var e1subs = '^ !';
var expected = '--------v--w--x--(yz|)';
expectObservable(e1.bufferCount(3, 1)).toBe(expected, values);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
it('should emit buffers with specified skip count when skip count is more than window count', function () {
var e1 = hot('--a--b--c--d--e--|');
var e1subs = '^ !';
var expected = '-----y--------z--|';
var values = {
y: ['a', 'b'],
z: ['d', 'e']
};
expectObservable(e1.bufferCount(2, 3)).toBe(expected, values);
expectSubscriptions(e1.subscriptions).toBe(e1subs);
});
});
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