45 lines
1.2 KiB
TypeScript
45 lines
1.2 KiB
TypeScript
import { expect } from '@open-wc/testing';
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import { UmbObjectState } from './object-state';
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describe('UmbObjectState', () => {
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type ObjectType = { key: string; another: string };
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let subject: UmbObjectState<ObjectType>;
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let initialData: ObjectType;
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beforeEach(() => {
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initialData = { key: 'some', another: 'myValue' };
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subject = new UmbObjectState(initialData);
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});
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it('replays latests, no matter the amount of subscriptions.', (done) => {
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const observer = subject.asObservable();
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observer.subscribe((value) => {
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expect(value).to.be.equal(initialData);
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});
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observer.subscribe((value) => {
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expect(value).to.be.equal(initialData);
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done();
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});
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});
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it('use getObservablePart, updates on its specific change.', (done) => {
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let amountOfCallbacks = 0;
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const subObserver = subject.getObservablePart((data) => data.another);
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subObserver.subscribe((value) => {
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amountOfCallbacks++;
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if (amountOfCallbacks === 1) {
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expect(value).to.be.equal('myValue');
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}
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if (amountOfCallbacks === 2) {
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expect(value).to.be.equal('myNewValue');
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done();
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}
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});
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subject.update({ key: 'change_this_first_should_not_trigger_update' });
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subject.update({ another: 'myNewValue' });
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});
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});
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