title: creating mocha test suite to start app just once
body: <p>I have following files</p>
  
  <pre><code>test1.ts
  test2.ts
  test3.ts
  test4.ts
  test5.ts
  </code></pre>
  
  <p>I want to start the tests at once with a unified before and after so that i start the application just once and run tests and close it after that</p>
  
  <p>every test file has its own describe</p>