input: Write a function named `create_rectangle_class` that generates a Python class called Rectangle to represent a two-dimensional rectangle with a length and a width. The class should have an initializer to set the length and width, and a method to calculate the area of the rectangle. The function should return this class definition. Additionally, provide test cases to validate the `area` method.
  
  
  def create_rectangle_class():
      class Rectangle:
          def __init__(self, length, width):
              self.length = length
              self.width = width
  
          def area(self):
              return self.length * self.width
      
      return Rectangle
  
  Rectangle = create_rectangle_class()
  assert Rectangle(5, 10).area() == 50
  assert Rectangle(3, 3).area() == 9
  assert Rectangle(0, 5).area() == 0
  assert Rectangle(7, 0).area() == 0
  assert Rectangle(1, 1).area() == 1
  
output: def create_rectangle_class():
      class Rectangle:
          def __init__(self, length, width):
              self.length = length
              self.width = width
  
          def area(self):
              return self.length * self.width
      
      return Rectangle