JavaScript jasmine-es6 catchError Examples

Example #1

File: promisify_spec.js Project: vinsonchuong/node-promise-es6

  it('wraps a (error, result)-callback-based function with a Promise', async () => {
    function successFn(callback) {
      callback(null, 'success');
    }
    const promisifiedSuccessFn = promisify(successFn);
    expect(await promisifiedSuccessFn()).toBe('success');

    function failFn(callback) {
      callback(new Error('fail'));
    }
    const promisifiedFailFn = promisify(failFn);
    expect(await catchError(promisifiedFailFn())).toBe('fail');
  });

Example #2

File: promise_queue_spec.js Project: vinsonchuong/esnext-async

 it('can propagate errors', async () => {
   const queue = new PromiseQueue();
   queue.throw(new Error('This is an error'));
   expect(await catchError(queue.consume())).toBe('This is an error');
 });