CR-MesoLabs-Inheritance-ProductManager

Product Inventory Project

• Objective - to implement an InventoryManager which interacts with a composite Inventory object by parsing incoming commands from a composite Console object.
• Purpose - to demonstrate understanding of
  • objects and functions
  • controlling execution
  • access control
  • reusing classes

Part 1.0 - Create class Product

• Create a Product class.
  • declare a field named id of type Long.
  • declare a field named price of type Double.
  • declare a field named quantity of type Integer.
  • define a constructor, which has paramters of type (Long, Double, Integer) used to set each of the respective fields.
  • define a nullary constructor, which sets each field to a null value.
  • define getters and setters for each of the fields

Part 1.1 - Test Product

• Ensure 100% test-success in the ProductTest class

Part 2.0 - Create class Inventory

• Create an Inventory class.
  • declare a field named productList of type List of Product objects.
  • define a constructor, which has a paramter of type List of Product used to set the respective field.
  • define a nullary constructor, which sets the productList field to a new instance of ArrayList.
  • define method named add, which adds a Product to the compositeproductList.
  • define method named remove, which makes use of a Product product parameter to remove a Product from the compositeproductList.
  • define method named contains, which makes use of a Product product parameter to return true if the provided Product has been added to the productList field.
  • define method named findById which makes use of a Long id parameter to return a Product with the respective id from the productList field.
  • define method named removeById, which makes use of a Long id parameter to remove a Product with the respective id from the productList field.
  • define method named getTotalQuantity which returns the sum of the quantity fields of the Product objects in the productList field.
  • define method named getTotalValue which returns the product of the quantity and price field of each of the Product objects in the productList field.
  • define getters and setters for each of the fields

Part 2.1 - Test Inventory

• Ensure 100% test-success in each of the classes in the inventory package

Part 3.0 - Create class Console

• Create a Console class.
  • declare a field named scanner of type Scanner.
  • declare a field named out of type PrintStream.
  • define a constructor which makes use of a (InputStream inputStream, PrintStream printStream) parameter to set the composite scanner and out fields.
  • define a nullary constructor, which
    • sets the scanner field to a new Scanner which takes an argument of System.in
    • sets the out field to System.out
  • define a method named println, which makes use of a String prompt parameter to print to the out field.
  • define a method named getStringInput which makes use of a String prompt parameter to prompt the user for some input, then returns the input of the user as a string.
  • define a method named getStringInput which makes use of a String prompt parameter to prompt the user for some input, then returns the input of the user as a string.
  • define a method named getDoubleInput which makes use of a String prompt parameter to prompt the user for some input, then returns the input of the user as a double.
  • define a method named getIntegerInput which makes use of a String prompt parameter to prompt the user for some input, then returns the input of the user as a integer.
  • define a method named getLongInput which makes use of a String prompt parameter to prompt the user for some input, then returns the input of the user as a long.
    

Part 3.1 - Test Console

• Ensure 100% test-success ConsoleTest class
  

Part 4.0 - Create class InventoryManager

• Create an InventoryManager class.
  • declare a field named inventory of type Inventory
  • declare a field named console of type Console
  • define a constructor which makes use of a (Inventory inventory, Console console parameters to set the inventory and console fields to the respective values
  • define a nullary constructor, which initializes the inventory and console fields to nullary-constructed Inventory and nullary-constructed Console.
  • define a method named getUserInput which prompts the user to input some variation of add, remove, view inventory, view product, or exit, then returns the input as a `String.
  • define a method named add which makes use of user to input to construct a new Product and add it to the inventory field.
  • define a method named remove which prompts a user to input an id and removes a Product with the respective id from the inventory field.
  • define a method named viewProduct which prompts a user to input an id and displays details about a Product with the repspective id from the `inventory field.
  • define a method named viewInventory which which displays the contents of the inventory.
  • define getters and setters for each of the fields.

Part 4.1 - Test InventoryManager

• Ensure 100% test-success Inventory class

Frequently Asked Questions

• May I modify the test cases?
  • uhm, no.
• May I write my own test cases?
  • absolutely
• Must I write my own tests?
  • No, but additional test-cases wouldn't hurt.
• Why have some methods been broken into entirely new test classes?
  • To ensure that more test cases can be written around each method in the future.