测试类型的正确方法是什么？

Question

我正在使用Jest进行单元测试，并且我想测试变量是否为Object。有更好的方法吗？

it('should throw an Error if options is not an Object', () => {
  const error = 'Options should be an Object.'

  expect(() => new Foo([])).toThrow(error)
  expect(() => new Foo(123)).toThrow(error)
  expect(() => new Foo('')).toThrow(error)
  expect(() => new Foo(true)).toThrow(error)
  expect(() => new Foo(NaN)).toThrow(error)
  expect(() => new Foo(null)).toThrow(error)
  expect(() => new Foo(() => {})).toThrow(error)
})

Answer 1

一如既往，循环可能会有所帮助：

 for(const type of [[], 123, '', true, NaN, null])
   expect(() => new Foo(type)).toThrow(error);