avocado/packages/core/test/virtualize.js

import {assert, expect} from 'chai';
import virtualize from '../src/virtualize';

const NoMethod = virtualize(['method'], class {});
const Method = class extends virtualize(['method'])(class {}) {method() {}};

describe('virtualize', () => {
  it("throws if virtual methods aren't implemented", () => {
    expect(() => {
      new NoMethod();
    }).to.throw();
  });
  it("doesn't throw if virtual methods are implemented", () => {
    expect(() => {
      new Method();
    }).to.not.throw();
  });
});