Is there a way/IDE extension/library to make links to code pieces?

The problem: when you work on a big project, or on many of them, and one of the tests fails for some reason, you can see what feature fails, but it is hard to recall where the implementation was.

So imagine, links in each test case to its implementation can make life easier. Is there any such IDE or library or convention or something in JSDoc for this?

There are some requirements also:

• A link to the line is impractical because you know, code changes, lines' contents do as well. So there should be some anchors on both ends, like in HTML.
• A link to the class or even to the method is also not always can point to the exact implementation.
• A link should be of course clickable in IDE, otherwise its' usefullness is near to zero