Update Product test and read me to give better instruction

README.md

 
 ## Part 1 - Product
 In the `test` folder, there is a `ProductTest` with most of the tested commented out.
-  1. Notice the word `Product` is red. That's because we need to create a new Class named `Product`. The file should be in `src/main/java/org.zipcoder.store`.
-    - To make the test pass, create a new empty constructor with no parameter
-  2. Uncomment the second test, line 14 - 26.
-    - Create a new constructor that takes a String for the product name
-  3. Continue to uncomment the test and make it pass
-  4. For the `get` and `set` test, you need to create a field and methods to get and set the field. 
-    - Ex:
-
-    ```java
-    public class Book {
-      private String title;
-
-      public void setTitle(String title){
-        this.title = title;
-      }
-
-      public String getTitle() {
-        return this.title;
-      }
-    }
-    ```
-  5. Continue to uncomment the test and add code to make the test pass
-  6. For the product description, it should be in this format `title (Color: color, Size: size)`
+  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

src/test/java/org/zipcoder/store/ProductTest.java

     }
 
     @Test
-    public void testConstruction_WithName(){
+    public void testGetSetName(){
         //Given
-        String expectedName = "T-Shirt";
+        String expectedName = "Pants";
+        Product product = new Product();
 
         //When
-        Product product = new Product(expectedName);
+        product.setName(expectedName);
 
         //Then
         String actualName = product.getName();
     }
 
     @Test
-    public void testGetSetName(){
+    public void testConstruction_WithName(){
         //Given
-        String expectedName = "Pants";
-        Product product = new Product();
+        String expectedName = "T-Shirt";
 
         //When
-        product.setName(expectedName);
+        Product product = new Product(expectedName);
 
         //Then
         String actualName = product.getName();