public void ArraySecond_SecondApproach_Success_True()
{
int[] nums = new int[] { 4, 1, 2, 1, 2 };
var number = new SingleNumber(nums);
var result = number.GetSingleNumber2();
Assert.AreEqual(4, result);
}
public void NullOrEmptyArray_SecondApproach_Success_True()
{
int[] nums = null;
var number = new SingleNumber(nums);
var result = number.GetSingleNumber2();
Assert.AreEqual(0, result);
}