title: Resolve file paths in Jest
body: <p>I have a React based app in which I have a test file which I intend to run through Jest. The test requires importing classes from other files. The file that I import further imports other files and so on. The project has alias for many paths to lessen the typing when importing them (this is configured in Webpack). </p>
  
  <p>When I run <code>jest</code> command in npm, I get an error saying 'Cannot find module ...`. How can I resolve file paths when running Jest? I can't mock the modules as these are custom modules which are required to run the test.</p>