• Implement test harness to unit test factors method.
• Perform basic path analysis to identify inputs and expected outputs. Use this set of inputs/outputs in your test harness of the unit tests.
• Perform equivalent partition and boundary value analysis of input space to determine inputs and outputs. Use this set of inputs/outputs in your test harness of the unit tests.
• Check for exceptions if any and modify the code if it doesn't behave as expected.

public static ArrayList factors(int n){ ArrayList intArray = new ArrayList(); while ( n%2 == 0 ){ intArray.add(2); n /= 2; } for (int i = 3; i <= Math.sqrt(n); i+= 2){ // While i divides n, print i and divide n  while (n%i == 0){ intArray.add(i); n /= i; } } if (n > 2) intArray.add(n); return intArray; }