Problem 1678. Count consecutive 0's in between values of 1

The starting or the trailing zeros in the array shouldn't be counted.

I think your first test case is wrong: when x = [1], then there are no pairs of consecutive ones, and the proper answer is y = [] rather than y = [0]. In contrast, y = [0] is correct when x = [1 1], where there are two ones that have no zeros in between.

I think you should revise your test cases.
The question is to find the number of zeroes between consecutive ones. Leading and trailing zeroes in x should not count.
E.g.
x=[1] -> y=[]
x=[0] -> y=[]
x=[0 1] -> y=[]
x =[1 0] -> y=[]
x = [0 1 0] -> y=[]
but
x = [1 1] -> y=[0]
x = [1 1 1] -> y=[0 0]
x = [1 0 1] -> y=[1]
etc.