title: How to Run Multiple Test Files with Haskell Stack Project
body: <p>I want to setup an existing Haskell project with <a href="https://docs.haskellstack.org" rel="noreferrer">Stack</a>. The existing project uses multiple files under a <code>test</code> directory; these separate test files by default, Stack (or cabal?) appears to utilize a single <code>test/Spec.hs</code> for testing. How can I continue to use multiple files with this project?</p>
  
  <p>NOTE: I'm learning Haskell, and this project approaches my learning from a "kata" approach. So tests are isolate to focus on one aspect of the language at a time.</p>