**Arrange:** - Configuring the environment (with for example Gradle v3.3). - Importing the junit .jar files, so we can run junit test cases. **Act:** - Making an instance of Equipment Class - Creating an Item with a type value of 0. - Adding this Item to the Equipment with the addEquip() method. **Assert:** - The method will handle that the type is not greater or equals then 2. **Actually:** - We got ArrayIndexOutOfBoundsException.  