• There is no instruction for what to do when offset >= depth.

• Also no example and sample test for the above case

• Unnecessary logs should be replaced with assertion messages and it blocks

• tests should be updated to node 12

• not enough random tests

• errors should be included in the random scenarii

• the ref solution is incorrect, because subject to floating point errors:

  [Number: 677253.527192] 8
  Should work with random numbers between 0.0000001 and 9999999.9999999 
  Expected: '677253.52719199', instead got: '677253.52719200'
  

There are only 3 random tests per run (which is not enough, should be something like 100), and the test are making the old "duplicate test case generation code n times instead of putting it in a loop" mistake again.

The tests does not check if the thing thrown is actually according to the descriptions.

When the number is negative, the test is asking to round up, not down.

-3000.567 rounded down is -3000.6, not -3000.5

Needs random test cases