User Story 1

As a skilled mathematician I want to develop a class for working with complex numbers, so that I can use it in my daily work.

Acceptance Criteria

• A class called Complex is available, which is used to create complex numbers.
• A complex number has a real part and an imaginary part.
• The real and imaginary part can only be accessed by the corresponding getter/setter from outside the class.
• A complex number has two methods:
  • add() to add the arguments to this and return this
  • toString() returns the complex number as string in the format re+im i (Beispiele: 2+5i, -1+2i, -3-4i, 2+i, 3, -i).
• The constructor function and the add method interpret their arguments according to the amount of arguments given, i.e.:
  • no argument -> number is 0
  • one argument -> (real) number or complex object
  • two arguments -> real and imaginary part
• The class has a static method to determine whether two complex numbers are equal.
• A number of different test cases test all methods and possible parameter types.

Hint: JavaScript allows default parameters.

User Story 2

As a developer, I want to create a subclass to learn about inheritance, so that I can reuse and extend functionality from a parent class.

Acceptance Criteria

• A class Animal exists with properties name and age, and a method describe() that returns "name is age years old".
• A subclass Dog extends Animal.
• Dog adds a property breed and a method info() that returns "name is age years old and is a breed".
• Test cases show that:
  • A Dog object can access methods from Animal (describe()).
  • The info() method correctly returns the combined information.
  • Objects can be instantiated with different property values.

Skill(s)

• JavaScript Classes