Test your code

This works.

// > const test = [5, 6, 7, 8, 1, 2, 12, 14, 5, 3, 2, 2]
// > const result = [ 1, 2, 2, 2, 3, 5, 5, 6, 7, 8, 12, 14 ]
// > oddEvenSort(test)
// > (test.every((val, index) => val === result[index]))
// true

Output

(node:6784) ExperimentalWarning: The ESM module loader is experimental.
running doctests in test.js...
[ 5, 6, 7, 8, 1, 2, 12, 14, 5, 3, 2, 2 ]
[ 1, 2, 2, 2, 3, 5, 5, 6, 7, 8, 12, 14 ]
.

Weird DocTest behaviour

Can anyone explain why the below doctest passes? Documentation for JavaScript seems poor.
Notice the 399 in the middle.

// > const test = [5, 6, 7, 8, 1, 2, 12, 14, 5, 3, 2, 2]
// > oddEvenSort(test)
// test [1,2,2,2,399,5,5,6,7,8,12,14]

The output I get:

(node:6277) ExperimentalWarning: The ESM module loader is experimental.
running doctests in test.js...
[ 5, 6, 7, 8, 1, 2, 12, 14, 5, 3, 2, 2 ]
[ 1, 2, 2, 2, 3, 5, 5, 6, 7, 8, 12, 14 ]
.

I think it's evaluating with test. Is there a syntax I am missing?