title: Build path entry is missing: /src/test/java
body: <p>While running my java project on Eclipse Luna, I have some errors due to which I suppose related to this problem.I right click on the project, choose properties --> java build path --> source, I see a warning at the top:</p>
  
  <p><img src="https://i.stack.imgur.com/ZI2WU.png" alt="enter image description here"></p>
  
  <p>And it seems that I have forgotten to add this package at the beginning of my project.I want to add it now, but I cannot do it via "Add Folder" button.When I press "Add Folder" button, a window appears like this one:</p>
  
  <p><img src="https://i.stack.imgur.com/9hBBV.png" alt="enter image description here"></p>
  
  <p>However, I believe I should add it under "Java Resources" on the tree:</p>
  
  <p><img src="https://i.stack.imgur.com/FOzVC.png" alt="enter image description here"></p>
  
  <p>How can I modify this?
  Thanks for any help..</p>