Building Enterprise JavaScript Applications

Run E2E test

But if we run our E2E tests now, the scenario that sends a malformed JSON would fail. This is because of how the body-parser middleware works. The bodyParser.json() middleware will attempt to parse the payload of all requests that has their Content-Type header set to application/json. However, if the payload itself is not a valid JSON object, the middleware will throw an error similar to the following:

SyntaxError {  expose: true,  statusCode: 400,  status: 400,  body: '{"email": "[e-mail]", name: }',  type: 'entity.parse.failed'}

Therefore, we need to catch this error in order to provide the correct response. Error handling can also be done through middleware, but they must be defined at the end, after other middleware. In ...