Yes,you are right.
I'm going to add that in description.
Thank you!

Yes, apostrophe is a part of word.
"o'clock" = "o'cl."

No, you are not required to trim the result. If string created by random test includes some white spaces just leave it like that.
You are asked just to shorten words which are longer then 3 characters.

JS
Test case says "should return true for a valid walk"

I consoled log array from test case and got this:
[ 'e', 'w', 'e', 'w', 'n', 's', 'n', 's', 'e', 'w' ]

For me it looks to be fine if my function return false for above array. Please let me know if I am wrong.

Sorry I will...
Thank you!

In JS there is a posibility to check for null,undefined,NaN,empty string (""),0 and false just doing:
if( value ) {
}

In this test case it doesn`t work. Need to check for every single value...