input: def IntList_test():
      """Design a data structure in Python to store integer values and provide methods to add values and find the minimum value among stored integers.
      
      Example:
      >>> my_list = IntList()
      >>> my_list.add_value(5)
      >>> my_list.add_value(3)
      >>> my_list.add_value(7)
      >>> my_list.find_min()
      3
      """
output:     
      class IntList:
          def __init__(self):
              self.values = []
          
          def add_value(self, value: int):
              self.values.append(value)
          
          def find_min(self) -> int:
              if not self.values:
                  raise ValueError("No values in the list")
              return min(self.values)
  