good points, but since author is no longer an active user, this kata won't go up again ;)

Code should be run inside it blocks, not describe blocks: it blocks are run asynchronously to generate test blocks so currently all logs done by user function will be bunched together before any test blocks, and makes debugging impossible.

What if there are multiple shortest paths? The kata doesn't specify what should be done in this case.

(This needs to be handled when random tests are up.)

I'll add them somewhere next week.

Random tests missing. Guess they will be forever missing since author is looong gone

description mentions this

Enjoyed this kata. The difficulty for me was my unfamiliarity with ES6, but at least I knew that was where to look to reach the final solution.

It's part of the edge case testing. Maps shouldn't have to be rectangular in shape.

WWWWW
W.............W
W.W.W~W.W.W.W.W
W...W~W...W.W.W
WW.W~~W.W.WWO.W
WW...W
WWWW....X
WWW
  Should return the quickest path

 Completed in 1ms
 Completed in 1ms
 Completed in 1ms
  Open Spaces
  
...~...........
..X~~O.........
...~...........
...............
...............
......
.........
  Should return the quickest path

Why your map is not a rectangle? ;-)