.then 在 promise 解决之前触发

Question

我正在使用 mocha 和 supertest 在 Node 中编写集成测试，并且必须在数据库中创建用户。我的问题是，有时用户会在测试完成后得到保存。 这是我的用户创建函数：

async function createUser() {
  const userParam = {
    username: "User",
    password: "123456789",
    firstName: "Max",
    lastName: "Mustermann",
    role: JSON.stringify(Role.User),
  };
  const user = new User(userParam);

  user.hash = bcrypt.hashSync(userParam.password, 10);

  await user.save();
  console.log("User saved!");
}

这是测试：

it("respond with 403 forbidden, because a standard user cant delete other users", function (done) {
        createUser().then(
          login(userLoginData).then((responseBody) => {
            request(app)
              .delete("/users/0000000000006204aefc242c")
              .set(
                "Authorization",
                `Bearer ${responseBody.body.accessToken}`,
              )
              .expect(
                403,
                {
                  Error: "Forbidden",
                  message:
                    "Forbidden for your rank, if its not your own account.",
                },
                done,
              );
          }),
        );
      });

这是我从 mocha 得到的输出：

  DELETE /
          Successes
    Admin saved!
    User saved!
          ✓ respond with 200 ok, because admins are allowed to delete all users (431ms)
    User saved!
          ✓ respond with 200 ok, because he is allowed to delete himself (195ms)
          Errors
            1) respond with 403 forbidden, because a standard user cant delete other users
    User saved!

前两个测试正在完成，因为所需的帐户是在测试之前创建的，但最后一个测试（如上所示）失败。

这里是当前 github 分支中文件的链接： https://github.com/Knniff/loginbackend/blob/2fa/test/tests.js

我很高兴收到所有反馈，如果您有更好的方法来做这些准备工作，我想听听。

Answer 1

您的测试中的第 2 行有问题。您无需等待 promise 解决并在 createUser() 函数之后立即调用 login() 函数。您应该将login() 函数调用包装到箭头函数() => login(userLoginData) 中。 您可以对测试进行以下更改：

      it("respond with 403 forbidden, because a standard user cant delete other users", function (done) {
        createUser()
          .then(() => login(userLoginData))
          .then((responseBody) => {
            request(app)
              .delete("/users/0000000000006204aefc242c")
              .set(
                "Authorization",
                `Bearer ${responseBody.body.accessToken}`,
              )
              .expect(
                403,
                {
                  Error: "Forbidden",
                  message:
                    "Forbidden for your rank, if its not your own account.",
                },
                done,
              );
          });
      });

编辑：

另外，我建议在您的测试中使用 async/await：

it("respond with 403 forbidden, because a standard user cant delete other users", async function () {
  await createUser();
  const responseBody = await login(userLoginData);
  await request(app)
    .delete("/users/0000000000006204aefc242c")
    .set(
       "Authorization",
       `Bearer ${responseBody.body.accessToken}`,
    )
    .expect(
       403,
       {
         Error: "Forbidden",
         message: "Forbidden for your rank, if its not your own account."
       }
    );
 
});