# Store Lab
* **Purpose** - to understand [classes](https://docs.oracle.com/javase/tutorial/java/concepts/class.html), [objects](https://docs.oracle.com/javase/tutorial/java/concepts/object.html) and [data encapsulation](https://en.wikipedia.org/wiki/Data_encapsulation).
* **Objective** - to create a cart with products and payment


## Part 1 - Product
In the `test` folder, there is a `ProductTest` with most of the tested commented out.
  1. The first test `testConstruction_WithNoParams` checks to see if the `Product` class has an empty constructor. To test it, I created a new object with no parameter.
  2. The second test `testGetSetName` checks to see if you can set and get the name of the product. In order to make this pass, I added a `String` field called `name` (line 5). Then I added a getter method `getName` (line 18-20) and a setter method `setName(String name)` (line 23-25).
  3. The third test `testConstruction_WithName` checks if the `Product` class has a constructor that takes a String. Notice we can have more than one constructor. When I create a new Product with a string `new Product("T-shirt")`, I set that string to the field `name` so when I called `getName`, I get the string that I passed into the constructor.
  4. Continue to uncomment the test and write the code to make it pass
  5. For the product description, it should be in this format `title (Color: color, Size: size)`
    - ex: `Hat (Color: Yellow, Size: LG)`

## Part 2 - Cart
A cart has an array of Product.
  1. Open the `CartTest` and uncomment line 9-13. To make the test pass:
    - Create a new class named `Cart`
    - Create a new constructor that takes an array of Product
    - Run the test, it should pass
  2. Create a getter for Product to make `testGetProducts` test pass
  3. To make `testGetSetDiscount` test pass:
    - Create a new decimal field called `discount`
    - Create a getter and setter for the field
    - Run the test
  4. To get `getProductTotal` tests to pass, you need add all the product prices together and return the result.
  5. To get the total, you need to add the total of all the products minus the discount. For example, if a product costs $100, and the discount is 20% (0.20), then the total = 100 - (100 * 0.20) = 80

## Part 3 - CreditCard
The goal of this exercise is to know how to create and test a class.
  1. In the test folder, create a new test class called `CreditCardTest`
  2. Create a new class called `CreditCard`
  2. Create a test case to get and set the `cardHolderName` of the type `String`
      - Create getter and setter methods in the `CreditCard` class
      - Add a field called cardHolderName
  2. Do the same for the following fields:
    - `String number`
    - `int expiredMonth`
    - `int expiredYear`
  3. Create a getter and setter for each field
  4. Create a test for `getDescription`
    - `getDescription` should return `[cardHolderName] [last 4 digit of the number] [expiredMonth]/[expiredYear]`
      - ex: `Tia Mowry 4551 10/2019`
  5. Add a `CreditCard` field to the `Cart` class
    - Add a getter and setter for the `creditCard` field

## Part 4 - Product as an ArrayList - BONUS
The goal of this exercise is to change the `products` array in the `Cart` class to an ArrayList.
  1. In the `CartTest`, change the `products` array to an `ArrayList`
    ```java
      ArrayList<Product> products = new ArrayList();
      products.add(new Product("Shirt", 15.01));
    ```
  2. Add this test to the `CartTest` class
  ```java
    @Test
    public void testAddToCard(){
        // Given
        ArrayList<Product> products = new ArrayList();
        Cart cart = new Cart(products);

        // When
        Product shirt = new Product("Shirt", 1.99);
        cart.addProduct(shirt);

        // Then
        double expectedTotal = 1.99;
        double actualTotal = cart.getProductTotal();
        Assert.assertEquals(expectedTotal, actualTotal, DELTA);
    }
  ```
    - Add a `addProduct` method to the `Cart` class
    - Run the test. It should pass.