使用 sinon 如何避免测试嵌套函数？

Question

我正在使用 mocha/chai/sino，我是其中三个的新手。

const a = () => {
  b();
}

const b = () => {
  console.log('here');
}

在这个例子中我只是想测试在调用a而不执行b时是否调用了b。

类似于：

it('test', () => {
  const spy = sinon.spy(b);
  a();
  chai.expect(spy.calledOnce).to.be.true;
})

Answer 1

诗乃的stub就是你要找的

Sinon Stubs

When to use stubs? Use a stub when you want to:

Control a method’s behavior from a test to force the code down a specific path. Examples > include forcing a method to throw an error in order to test error handling.

When you want to prevent a specific method from being called directly (possibly because it triggers undesired behavior, such as a XMLHttpRequest or similar).

it('test', () => {
  const stub = sinon.stub(b);
  a();
  chai.expect(stub.calledOnce).to.be.true;
})

使用 sinon 如何避免测试嵌套函数？

Using sinon how to avoid testing nested function?

javascript

mocha.js

sinon

sinon-chai