<p dir="auto">hi, when I run webpack, I get a warning message like:</p>
<p dir="auto">WARNING in node_modules/express/lib/view.js<br>
Critical dependencies:<br>
78:29-56 the request of a dependency is an expression<br>
@ node_modules/express/lib/view.js 78:29-56</p>
<p dir="auto">I'm not clear what I should do to resolve this. thanks.</p>
<p dir="auto"><strong>Do you want to request a <em>feature</em> or report a <em>bug</em>?</strong><br>
Bug</p>


<p dir="auto"><strong>What is the current behavior?</strong><br>
Un-referenced code is included in bundle (no tree shaking).</p>
<p dir="auto"><strong>If the current behavior is a bug, please provide the steps to reproduce.</strong><br>
Minimal example:  <a href="https://github.com/GordonSmith/tmp">https://github.com/GordonSmith/tmp</a></p>



<p dir="auto"><strong>What is the expected behavior?</strong><br>
unitTest function to be excluded from the bundle</p>
<p dir="auto"><strong>If this is a feature request, what is motivation or use case for changing the behavior?</strong></p>
<p dir="auto"><strong>Please mention other relevant information such as the browser version, Node.js version, webpack version and Operating System.</strong></p>