mocha.js - Mocha 茶 Sequelize : I can't make tests fail

Question

我正在尝试为 sequelize 中的模型编写测试，但我不明白为什么它没有失败

it('should find user by id', (done) => {
  users.findByPk(2)
  .then((retrievedUser) => {
    expect(retrievedUser.dataValues).to.deep.equal('it should break');
    done();
  })
  .catch((err) => {
    console.log(`something went wrong [should find user by id] ${err}`);
    done();
  })
});

当我运行测试时，输出如下

something went wrong [should find user by id] AssertionError: expected { Object (id, email, ...) } to deeply equal 'it should break'
1   -__,------,
0   -__|  /\_/\
0   -_~|_( ^ .^)
    -_ ""  ""

  1 passing (40ms)

如果有人想看完整代码，我创建了一个 project

Answer 1

要使异步 Mocha 测试失败，请将错误作为参数传递给 done 回调函数

it('should find user by id', (done) => {
  users.findByPk(2)
  .then((retrievedUser) => {
    expect(retrievedUser.dataValues).to.deep.equal('it should break');
    done();
  })
  .catch((err) => {
    console.log(`something went wrong [should find user by id] ${err}`);
    done(err);
  })
});

或者，使用没有回调的异步函数:

it('should find user by id', async () => {
  const retrievedUser = await users.findByPk(2);
  try {
    expect(retrievedUser.dataValues).to.deep.equal('it should break');
  } catch (err) {
    console.log(`something went wrong [should find user by id] ${err}`);
    throw err;
  }
});

也就是说，我不建议记录失败测试的错误消息，因为这就是 Mocha 在典型设置中已经为您做的事情。所以我会去掉上面例子中的 try-catch 块。

it('should find user by id', async () => {
  const retrievedUser = await users.findByPk(2);
  expect(retrievedUser.dataValues).to.deep.equal('it should break');
});