英文:
Why doesn't Jest see the function call?
问题
我有一个带有 login 方法的类：
import authService from "../service/auth";
class AuthController {
async login(req, res, next) {
try {
const { email, password } = req.body;
const token = await authService.login(email, password);
res.cookie("token", token, {
maxAge: 30 * 24 * 60 * 60 * 1000,
httpOnly: true,
});
return res.status(200).json();
} catch (e) {
next(e);
}
}
}
export = new AuthController();
以及测试：
import AuthController from "./auth.controller";
import authService from "../service/auth";
describe("AuthController.login", () => {
it("如果成功获取到令牌，应该调用res.status(200).json()", () => {
const next = jest.fn();
const req = {
body: {
email: "email@example.com",
password: "1234",
},
};
const res = { cookie: jest.fn() };
jest.spyOn(authService, "login").mockResolvedValue("t0ken");
AuthController.login(req, res, next);
expect(res.cookie).toBeCalledWith("token", "t0ken", {
maxAge: 30 * 24 * 60 * 60 * 1000,
httpOnly: true,
});
});
});
问题在于 Jest 声明 res.cookie 未被调用。
但在调试时，您可以看到调用正在发生：
如果我注释掉：
const token = await authService.login(email, password);
并将 token 常量的值传递给：
测试将会通过。
我认为我在异步函数 await autoservice.login(email, password) 上错误地进行了监听。您能告诉我在哪里出错以及为什么我的测试不起作用吗？
英文:
I have a class with the login method:
import authService from "../service/auth";
class AuthController {
async login(req, res, next) {
try {
const { email, password } = req.body;
const token = await authService.login(email, password);
res.cookie("token", token, {
maxAge: 30 * 24 * 60 * 60 * 1000,
httpOnly: true,
});
return res.status(200).json();
} catch (e) {
next(e);
}
}
}
export = new AuthController();
And the test:
import AuthController from "./auth.controller";
import authService from "../service/auth";
describe("AuthController.login", () => {
it("If it turned out to get a token, then a call should occur res.status(200).json()", () => {
const next = jest.fn();
const req = {
body: {
email: "email@example.com",
password: "1234",
},
};
const res = { cookie: jest.fn() };
jest.spyOn(authService, "login").mockResolvedValue("t0ken");
AuthController.login(req, res, next);
expect(res.cookie).toBeCalledWith("token", "t0ken", {
maxAge: 30 * 24 * 60 * 60 * 1000,
httpOnly: true,
});
});
});
The problem is that Jest claims that res.cookie is not called.
But when debugging, you can see that the call is happening:
If I comment out:
const token = await authService.login(email, password);
and I will enter the value of the token constant in:
The test will be passed.
I assume that I am incorrectly spying on the asynchronous function await autoservice.login(email, password). Can you tell me where I'm wrong and why my test doesn't work?
答案1
得分: 1
以下是翻译好的部分：
有一个问题 - AuthController.login 是一个异步方法 async login(req, res, next)，而我编写了一个同步测试：
it('如果成功获取令牌，那么应该调用 res.status(200).json()', () => {test...}
因此，正确的测试应该如下：
import AuthController from "./auth.controller";
import authService from "../service/auth";
describe("AuthController.login", () => {
it("如果成功获取令牌，那么应该调用 res.status(200).json()", async () => {
const next = jest.fn();
const req = {
body: {
email: "email@example.com",
password: "1234",
},
};
const res = { cookie: jest.fn() };
jest.spyOn(authService, "login").mockResolvedValue("token");
await AuthController.login(req, res, next);
expect(res.cookie).toBeCalledWith("token", "token", {
maxAge: 30 * 24 * 60 * 60 * 1000,
httpOnly: true,
});
});
});
英文:
There was only one problem -AuthController.login is an asynchronous method async login(req, res, next) , and I wrote a
synchronous test:
it('If it turned out to get a token, then a call should occur res.status(200).json()', () => {test...}
Therefore, the correct test will look like this:
import AuthController from "./auth.controller";
import authService from "../service/auth";
describe("AuthController.login", () => {
it("If it turned out to get a token, then a call should occur res.status(200).json()", async () => {
const next = jest.fn();
const req = {
body: {
email: "email@example.com",
password: "1234",
},
};
const res = { cookie: jest.fn() };
jest.spyOn(authService, "login").mockResolvedValue("t0ken");
await AuthController.login(req, res, next);
expect(res.cookie).toBeCalledWith("token", "t0ken", {
maxAge: 30 * 24 * 60 * 60 * 1000,
httpOnly: true,
});
});
});
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