zzmq.dev@gmail.com[maint]

implement max(n) and add tests.

Extend your existing sum function's test cases if they exist, or write them from scratch ensuring coverage for edge cases like empty arrays and large datasets. Place these tests within an appropriate file in the test directory.

Create unit tests for the isEven function to verify its correctness with various inputs including positive numbers, negative numbers, zero, etc. Place these tests in a new or existing test file inside the test directory.

Write a function named isEven that takes an integer n and returns true if n is even, false otherwise. Ensure it's located in the appropriate file within your project.