test/src/tasks/push.spec.js

import proxyquire from 'proxyquire';
import expect from '../../expect';

const push = proxyquire('../../../src/tasks/push', {
  '../api': {
    _esModule: true,
    async readNode() {
      throw new Error('Test');
    },
  },
}).default;

/** @test {push} */
describe('push', function () {
  it('should return a promise', function () {
    const promise = push();
    expect(promise, 'to be a', Promise);

    return promise.catch((err) => {
      if (err.message === 'Test') {
        return;
      }

      throw err;
    });
  });
});