Mock Server

Super simple mock server that allows applications to be built as if hitting a real server because having to make code changes to run locally vs in production isn't cool.

Goals are to:

• Keep code and mocks separated
  • No code changes for mocking and mocks aren't bundled with code
• Keep mocks and data close to the code
  • Clean organization and not a jumbled mess of spaghetti files
• Allow for extensible mocking of responses and statuses
  • Give open access to the underlying server without complications
• Live-reload!
  • Keep up with fast paced development by refreshing mocks when files are changed

Install

Install as a dev dependency, along with npm-run-all to run in parrallel with your code development server.

npm i --save-dev @common/mock-server npm-run-all

Create a proxy configuration file at the top of the project to proxy all HTTP calls to the mock server (proxy.mock.json)

{
  "/api": {
    "target": "http://localhost:4300",
    "secure": false,
    "debug": true
  }
}

Change start command to start both servers:

{
    ...
    "start": "npm-run-all --parallel mock-server start-proxy-mocks",
    "start-proxy-mocks": "ng serve --proxy-config proxy.mock.json",
    "mock-server": "mock-server",
    ...
}

Basic Usage

When booting up, a file scan is done to discover controllers - *.mock.js files. It's recommended to keep the mock file with the service it belongs to. By default the Mock Server will search /src/ for all files matching *.mock.js to register with the server.

my-project
 |- node_modules
 |- src
     |- app
         |- services
             |- my-service
                 |- myService.service.ts
                 |- myService.mock.js
                 |- myService.data.json

myService.mock.js

module.exports = {
  '/api/v1/endpoint': {
    get: (req, res) => {
      res.json({ msg: 'Hurrah!'});
    }
  }
}

If mock data is large, it's also common to create a .json file and include it into the *.mock.js.

myService.data.json

{
    "mySubObject": {
        "msg": "Sweet response!"
    }
}

myService.mock.js

var data = require('./my-data.json');

module.exports = {
  '/api/v1/endpoint': {
    get: (req, res) => {
      res.json(data.mySubObject);
    }
  }
}