Javascript 使用node.js的断言引发测试错误

看文档时我很困惑，我们应该如何测试错误

我在index.js中有这个除法函数

function divide(dividend, divisor) {
    if(divisor === 0) {
      throw new Error('the quotient of a number and 0 is undefined');
    } else {
      return  dividend / divisor;
    }
  }

测试应该是什么样子？我知道这将是2种情况，第一种是测试除法，我没有问题，但我不知道如何测试错误，如果用户通过零

我正在使用mocha和assert（节点的assert）

---

实现代码如下所示：

  divide(dividend, divisor) {
    if (divisor === 0) {
      throw new Error('the quotient of a number and 0 is undefined');
    } else {
      return dividend / divisor;
    }
  },

it("returns an exception when the divisor is 0", () => {
  const dividend = 8;
  const divisor = 0;
  expected = Error;

  const exercise = () => Calculate.divide(dividend, divisor);

  assert.throws(exercise, expected);
})

测试代码如下所示：

  divide(dividend, divisor) {
    if (divisor === 0) {
      throw new Error('the quotient of a number and 0 is undefined');
    } else {
      return dividend / divisor;
    }
  },

it("returns an exception when the divisor is 0", () => {
  const dividend = 8;
  const divisor = 0;
  expected = Error;

  const exercise = () => Calculate.divide(dividend, divisor);

  assert.throws(exercise, expected);
})

---

这是根据nodejs

assert.throws

或

try/catch

和

assert

true/false（catch块中为true）确定的。