public void OddOccurances_Should_Process_Complex_Array()
{
OddOccurances subject = new OddOccurances();
int[] array = { 1, 4, 5, 9, 1, 4, 5, 9, 11, 11, 11 };
int result = subject.solution(array);
Assert.Equal(11, result);
}
public void OddOccurances_Should_Handle_Empty_Array()
{
OddOccurances subject = new OddOccurances();
int[] array = { };
int result = subject.solution(array);
Assert.Equal(0, result);
}