almost done

src/main/java/com/zipcoder/payment/PaymentPresenter.java

@@ -2,6 +2,44 @@ package com.zipcoder.payment;
 
 public class PaymentPresenter {
 
-    public
+    PaymentSort ofSort;
+
+    public PaymentPresenter(PaymentSort of){
+        this.ofSort = of;
+    }
+
+    public String toString(Payment[] payments){
+        StringBuilder sb = new StringBuilder();
+
+        sortBy(payments);
+
+        for(int i = 0; i < payments.length; i++){
+            sb.append(payments[i].getShortDescription());
+            sb.append("\n");
+        }
+
+        return sb.toString();
+    }
+
+    public Payment[] byShortName(Payment[] payments){
+        boolean isNotSorted = true;
+
+        while(isNotSorted){
+            isNotSorted = false;
+            for(int i = 0; i < payments.length - 1; i++){
+                if(payments[i].getShortDescription().compareTo(payments[i + 1].getShortDescription()) > 0){
+                    isNotSorted = true;
+                    Payment temp = payments[i];
+                    payments[i] = payments[i + 1];
+                    payments[i+1] = temp;
+
+                }
+            }
+        }
+        return payments;
+    }
+
+
+
 
 }

src/main/java/com/zipcoder/payment/PaymentSort.java

@@ -0,0 +1,5 @@
+package com.zipcoder.payment;
+
+public enum PaymentSort {
+    ID, PAYERNAME, SHORTDESCRIPTION
+}

src/test/java/com/zipcoder/payment/PaymentPresenterTest.java

@@ -1,12 +1,13 @@
 package com.zipcoder.payment;
 
 import org.junit.Test;
-import static org.junit.jupiter.api.Assertions.*;
 
-class PaymentPresenterTest {
+import static org.junit.Assert.*;
+
+public class PaymentPresenterTest {
 
     @Test
-    void emptyTestOne() {
+    public void emptyTestOne() {
         //When
         Payment[] payments = new Payment[0];
         PaymentPresenter presenter = new PaymentPresenter();
@@ -20,4 +21,26 @@ class PaymentPresenterTest {
         assertEquals(expected, actual);
     }
 
-}
+    @Test
+    public void SortByShortDescriptionTest() {
+        //When
+        Payment[] payments = new Payment[3];
+        Payment cc = new CreditCard(12, 4111131,"Nicholas Maidanos", 4, 11);
+        Payment pp = new Paypal(23, "Nicholas Maidanos", "nmaidanos@gmail.com");
+        Payment ck = new Check(46,"Nicholas Maidanos", "8934", "3343234");
+
+        PaymentPresenter paymentp = new PaymentPresenter(PaymentSort.SHORTDESCRIPTION);
+
+        payments[0] = pp;
+        payments[1] = cc;
+        payments[2] = ck;
+        //Expect
+        String expected = "CC Nicholas Maidanos 1131 4/11\nCheck Nicholas Maidanos ****3234\nPayPal Nicholas Maidanos nmaidanos@gmail.com\n";
+
+        //Actual
+        String actual = paymentp.toString(payments);
+
+        assertEquals(expected, actual);
+    }
+
+}