为集成测试导入 express 实例

Question

I did separate my unit and integration tests.

For unit test it's very simple and it's working, but I have some problem with integration tests using "supertest".

I have test commands in packege.json :

"test": "jest -c jest.config.js",
"testIntegration": "jest -c jest.config.integration.js"

The jest.config.integration.js file looks like this:

const unitConfig = require('./jest.config');

unitConfig.testPathIgnorePatterns = ['_tests_/unit', '_tests_/acceptance'];
unitConfig.maxConcurrency = 1;
unitConfig.globalSetup = '<rootDir>config/jest/globalSetup.js';
unitConfig.globalTeardown = '<rootDir>config/jest/globalTeardown.js';

module.exports = unitConfig;

The globalSetup.js file have one function that init db connection and init express application.

const startupFunctions = require('../../startupFunctions');
module.exports = (async () => {
  await startupFunctions.startup();
}), 10000;

Ok! But now, in test file, when I importing instance of express application, is pure new instance! Like I did const app = express() This app have no all routes and middlewares.

if I move startup function to beforeAll , then everything is fine and working.

Any suggestions?

Answer 1

I found that is not possible. https://github.com/facebook/jest/issues/7184