forked from CIT/Vmeda.Online
102 lines
3.3 KiB
TypeScript
102 lines
3.3 KiB
TypeScript
// (C) Copyright 2015 Moodle Pty Ltd.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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import { CoreSubscriptions } from '@singletons/subscriptions';
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import { BehaviorSubject, Subject } from 'rxjs';
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describe('CoreSubscriptions singleton', () => {
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let subject: Subject<unknown>;
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let success: jest.Mock;
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let error: jest.Mock;
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let complete: jest.Mock;
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beforeEach(() => {
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subject = new Subject();
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success = jest.fn();
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error = jest.fn();
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complete = jest.fn();
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});
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it('calls success callback only once', async () => {
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CoreSubscriptions.once(subject, success, error, complete);
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subject.next('foo');
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expect(success).toHaveBeenCalledTimes(1);
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expect(success).toHaveBeenCalledWith('foo');
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subject.next('bar');
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subject.error('foo');
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expect(success).toHaveBeenCalledTimes(1);
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expect(error).not.toHaveBeenCalled();
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expect(complete).not.toHaveBeenCalled();
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});
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it('calls error callback only once', async () => {
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CoreSubscriptions.once(subject, success, error, complete);
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subject.error('foo');
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expect(error).toHaveBeenCalledWith('foo');
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subject.next('foo');
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subject.error('bar');
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expect(error).toHaveBeenCalledTimes(1);
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expect(success).not.toHaveBeenCalled();
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expect(complete).not.toHaveBeenCalled();
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});
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it('calls complete callback only once', async () => {
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CoreSubscriptions.once(subject, success, error, complete);
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subject.complete();
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expect(complete).toHaveBeenCalled();
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subject.next('foo');
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subject.error('bar');
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subject.complete();
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expect(complete).toHaveBeenCalledTimes(1);
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expect(success).not.toHaveBeenCalled();
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expect(error).not.toHaveBeenCalled();
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});
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it('calls success callback only once with behaviour subject', async () => {
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// Test with behaviour subject (success callback called immediately).
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const beaviourSubject = new BehaviorSubject('foo');
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CoreSubscriptions.once(beaviourSubject, success, error, complete);
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expect(success).toHaveBeenCalledWith('foo');
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beaviourSubject.next('bar');
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beaviourSubject.error('foo');
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expect(success).toHaveBeenCalledTimes(1);
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expect(error).not.toHaveBeenCalled();
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expect(complete).not.toHaveBeenCalled();
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});
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it('allows unsubscribing from outside the once function', async () => {
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const subject = new Subject();
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const success = jest.fn();
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const error = jest.fn();
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const unsubscribe = CoreSubscriptions.once(subject, success, error);
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unsubscribe();
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subject.next('foo');
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subject.error('bar');
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expect(success).not.toHaveBeenCalled();
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expect(error).not.toHaveBeenCalled();
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});
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});
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