Test Writing: Only Circles

Created By: Chris Taylor

/ Version: 2023.6.0

Write a method onlyCircles that accepts a list of Shapes and returns a list of Shapes where anything other than a Circle is removed from The original list. You may assume that the list passed is not null and does not contain any null elements. Your solution must make use of a stream and at least one lambda expression and/or method reference.

There are 3 classes available to you:

• Shape - an abstract class with the following methods:
  • Shape(double centerX, double centerY)
  • double getCenterX()
  • double getCenterY()
  • abstract double getArea()
  • abstract double getPerimeter()
• Circle - a class with the following methods:
  • Circle(double centerX, double centerY, double radius)
  • double getArea()
  • double getPerimeter()
• Rectangle - a class with the following methods:
  • Rectangle(double centerX, double centerY, double width, double height)
  • double getHeight()
  • double getWidth()
  • double getArea()
  • double getPerimeter()

Test Design Challenge

You're challenge is to write tests for this problem described above.

• Provide a method named test that accepts no arguments and does not return a value.
• If the implementation of the class described above is incorrect, your test method should throw an exception.
• If it is correct, do not throw an exception.
• You may want to use Java's assert method