List the boundary conditions and tests needed for a method with the following heading:

/** * Search an array to find the first occurrence of the * largest element * @param x Array to search * @return The subscript of the first occurrence of the * largest element * @throws NullPointerException if x is null */ public static int findLargest(int[] x) { 

1. Write the findLargest method described above using Test-Driven Development.