[英]How to test with the marble approach when the returm is a EMPTY observable in effect?
[英]How to create an Observable timer test in jasmine-marble?
我無法創建測試以測試功能startTimer中的Observable計時器。 我使用的是RXJS的6.3.1版本。
這是我的代碼:
private createSubscribe(): void {
if (this.timer) {
this.subscription = this.timer.subscribe(() => {
this.cream().then(() => {
this.subscription.unsubscribe();
this.subscription = null;
this.timer = null;
this.startTimer(this.config.period);
});
});
}
}
private startTimer(period): void {
if (period) {
this.timer = timer(period * 1000);
this.createSubscribe();
}
}
我使用以下方法解決了我的問題:
it('startTimer: should call createSubscribe and set timer with observable emited in 5000ms.', () => {
const scheduler = new TestScheduler((actual, expected) => {
expect(actual).toEqual(expected);
});
scheduler.run(helpers => {
const { expectObservable } = helpers;
const period = 5;
const expected = '5000ms (a|)';
spyOn(helper, <any>'createSubscribe');
helper['startTimer'](period);
expectObservable(helper['timer']).toBe(expected, {a : 0});
expect(helper['createSubscribe']).toHaveBeenCalled();
});
});
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