@reactivex/rxjs
Version:
Reactive Extensions for modern JavaScript
61 lines • 2.66 kB
JavaScript
;
var Rx = require('../../dist/cjs/Rx');
/** @test {isEmpty} */
describe('Observable.prototype.isEmpty', function () {
asDiagram('isEmpty')('should return true if source is empty', function () {
var source = hot('-----|');
var subs = '^ !';
var expected = '-----(T|)';
expectObservable(source.isEmpty()).toBe(expected, { T: true });
expectSubscriptions(source.subscriptions).toBe(subs);
});
it('should return false if source emits element', function () {
var source = hot('--a--^--b--|');
var subs = '^ !';
var expected = '---(F|)';
expectObservable(source.isEmpty()).toBe(expected, { F: false });
expectSubscriptions(source.subscriptions).toBe(subs);
});
it('should raise error if source raise error', function () {
var source = hot('--#');
var subs = '^ !';
var expected = '--#';
expectObservable(source.isEmpty()).toBe(expected);
expectSubscriptions(source.subscriptions).toBe(subs);
});
it('should not completes if source never emits', function () {
var source = cold('-');
var subs = '^';
var expected = '-';
expectObservable(source.isEmpty()).toBe(expected);
expectSubscriptions(source.subscriptions).toBe(subs);
});
it('should return true if source is Observable.empty()', function () {
var source = cold('|');
var subs = '(^!)';
var expected = '(T|)';
expectObservable(source.isEmpty()).toBe(expected, { T: true });
expectSubscriptions(source.subscriptions).toBe(subs);
});
it('should allow unsubscribing explicitly and early', function () {
var source = cold('-----------a--b--|');
var unsub = ' ! ';
var subs = '^ ! ';
var expected = '------- ';
expectObservable(source.isEmpty(), unsub).toBe(expected);
expectSubscriptions(source.subscriptions).toBe(subs);
});
it('should not break unsubscription chains when result is unsubscribed explicitly', function () {
var source = cold('-----------a--b--|');
var subs = '^ ! ';
var expected = '------- ';
var unsub = ' ! ';
var result = source
.mergeMap(function (x) { return Rx.Observable.of(x); })
.isEmpty()
.mergeMap(function (x) { return Rx.Observable.of(x); });
expectObservable(result, unsub).toBe(expected);
expectSubscriptions(source.subscriptions).toBe(subs);
});
});
//# sourceMappingURL=isEmpty-spec.js.map