【发布时间】：2020-07-12 03:25:20
【问题描述】：
我在 TypeScript 中有一个 HapiJS 项目，想开始添加一些单元测试。现在代码很简单：
server.ts
import * as Hapi from "@hapi/hapi";
import routes from "./routes";
const server = new Hapi.Server({
port: 80,
host: "0.0.0.0",
debug: {
request: ["error"]
}
});
let serverSetup = false;
const setupServer = async () =>
{
if (serverSetup) return;
await server.register([routes]);
serverSetup = true;
};
export const init = async () =>
{
await setupServer();
await server.initialize();
return server;
};
export const start = async () =>
{
await setupServer();
await server.start();
console.log(`Server running at: ${server.info.uri}`);
return server;
};
routes.ts：
import * as Hapi from "@hapi/hapi";
export default {
name: "RouteIndex",
version: "1.0.0",
register: function (server:Hapi.Server, options:Hapi.ServerRegisterOptions)
{
server.route({
method: "GET",
path: "/",
handler: (request, h) =>
{
return {message: "Hello, World!"};
}
});
server.route({
method: "*",
path: "/{any*}",
handler: (request, h) =>
{
return "404!";
}
});
}
};
然后是我的单元测试：
server.test.js
const Lab = require("@hapi/lab");
const { expect } = require("@hapi/code");
const { afterEach, beforeEach, describe, it } = exports.lab = Lab.script();
const { init, start } = require("../src/server");
const HTTP_PORT = 80;
const HTTP_STATUS_OK = 200;
describe("General Server Tests", () =>
{
let server;
beforeEach(async () =>
{
server = await init();
});
afterEach(async () =>
{
await server.stop();
});
it("Starts successfully", async () =>
{
server = await start();
expect(server.type).to.equal("tcp");
expect(server.settings.port).to.equal(HTTP_PORT);
expect(server.settings.host).to.equal("0.0.0.0");
});
it("Responds to GET requests", async () =>
{
const res = await server.inject({
method: "GET",
url: "/"
});
expect(res.statusCode).to.equal(HTTP_STATUS_OK);
});
});
要运行我的测试，我的 package.json 中有以下内容：
{
// ...
"scripts": {
// ...
"test": "lab -vclS -T node_modules/lab-transform-typescript **/*.test.js",
// ...
}
// ...
}
- 添加
-v标志是因为我更喜欢详细输出 - 添加了
-c标志，以便我可以获得代码覆盖率报告，这就是我的问题所在 - 必须添加
-l标志，否则我会收到错误消息：The following leaks were detected:__extends, __assign, __rest, __decorate, __param, __metadata, __awaiter, __generator,...（由 TypeScript 编译器创建的所有全局变量） -
-S标志是根据 lab-transform-typescript documentation (-S==--sourcemaps) 添加的 -
-T标志用于加载lab-transform-typescript(-T==--transform)
当我运行测试时，结果如下：
stevenbarnett@MacBook-Pro hapi-test % npm run test
> hapi-test@1.0.0 test /Users/stevenbarnett/Repos/hapi-test
> lab -vclS -T node_modules/lab-transform-typescript **/*.test.js
Server running at: http://0.0.0.0:80
General Server Tests
✔ 1) Starts successfully (4 ms)
✔ 2) Responds to GET requests (7 ms)
3 tests complete
Test duration: 111 ms
Coverage: 71.50% (61/214)
src/server.ts missing coverage from file(s):
null on line(s): , , , , , , , , , , , , , , , , , ,
src/routes.ts missing coverage from file(s):
null on line(s): , , , , , , , , , , , , , , , , , , , , ,
src/routes/index.ts on line(s): 24
所以我知道src/routes/index.ts 在第 24 行缺少覆盖（这是 404 错误，我没有测试 404）——但其他行是荒谬的：
null on line(s): , , , , , , , , , , , , , , , , , ,
为什么会发生这种情况，我该如何解决？
【问题讨论】：
标签： node.js typescript unit-testing hapijs lab