the rest of the lab

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

     private String routingNumber;
     private String accountNumber;
 
+    public Check() {
+
+    }
+
+    public Check(String payerName, String accountNumber) {
+        this.payerName = payerName;
+        this.accountNumber = accountNumber;
+    }
+
+    public Check(Long id, String payerName, String routingNumber, String accountNumber) {
+        this.id = id;
+        this.payerName = payerName;
+        this.accountNumber = accountNumber;
+        this.routingNumber = routingNumber;
+    }
+
     public Long getId() {
         return this.id;
     }
     public void setAccountNumber(String accountNumber) {
         this.accountNumber = accountNumber;
     }
+
+    public int compareTo(Payment other) {
+        return this.getShortDescription().compareTo(other.getShortDescription());
+    }
 }

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

     public void setExpiredYear(int expiredYear) {
         this.expiredYear = expiredYear;
     }
+
+    public int compareTo(Payment other) {
+        return this.getShortDescription().compareTo(other.getShortDescription());
+    }
 }

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

         this.email = email;
     }
 
+    public PayPal(Long id, String payerName, String email) {
+        this.id = id;
+        this.payerName = payerName;
+        this.email = email;
+    }
+
     public Long getId() {
         return this.id;
     }
     public void setEmail(String email) {
         this.email = email;
     }
+
+    public int compareTo(Payment other) {
+        return this.getShortDescription().compareTo(other.getShortDescription());
+    }
 }

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

 package com.zipcoder.payment;
 
-public interface Payment {
+public interface Payment extends Comparable<Payment>{
 
     public Long getId();
 
     public String getPayerName();
 
     public String getShortDescription();
+
+    public int compareTo(Payment other);
 }

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

 package com.zipcoder.payment;
 
+import java.util.Arrays;
+
 public class PaymentPresenter {
 
+    public PaymentPresenter() {
+        Payment payment;
+    }
+
+    public String toString(Payment[] payments) {
+        Arrays.sort(payments);
+        String shortDescription = "";
+        for (Payment currentPmnt : payments) {
+            shortDescription = shortDescription.concat(currentPmnt.getShortDescription() + "\n");
+        }
+        return shortDescription;
+    }
+
+    public String toStringByPayerName(Payment[] payments) {
+        Arrays.sort(payments, new PaymentSortByPayer());
+        String shortDescription = "";
+        for (Payment currentPmnt : payments) {
+            shortDescription = shortDescription.concat(currentPmnt.getShortDescription() + "\n");
+        }
+        return shortDescription;
+    }
 
-}
+    public String toStringById(Payment[] payments) {
+        Arrays.sort(payments, (p1, p2) -> p1.getId().compareTo(p2.getId()));
+        String shortDescription = "";
+        for (Payment currentPmnt : payments) {
+            shortDescription = shortDescription.concat(currentPmnt.getShortDescription() + "\n");
+        }
+        return shortDescription;
+    }
+}

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

+package com.zipcoder.payment;
+
+import java.util.Comparator;
+
+public class PaymentSortByPayer implements Comparator<Payment> {
+
+    public int compare(Payment first, Payment second) {
+        return first.getPayerName().compareTo(second.getPayerName());
+    }
+}

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

+package com.zipcoder.payment;
+
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+public class CompareToTest {
+
+    @Test
+    public void compareToNegativeTest(){
+        Check myCheck = new Check("Dan Rivas", "1243567895");
+        PayPal pp = new PayPal("Shane McNaulty", "shane@loews.com");
+        int actual = myCheck.compareTo(pp);
+        assertTrue(actual < 0);
+    }
+
+    @Test
+    public void compareToPositiveTest(){
+        Check myCheck = new Check("Dan Rivas", "1243567895");
+        PayPal pp = new PayPal("Shane McNaulty", "shane@loews.com");
+        int actual = pp.compareTo(myCheck);
+        assertTrue(actual > 0);
+    }
+
+    @Test
+    public void compareToZeroTest(){
+        Payment myCheck = new Check("Dan Rivas", "1243567876");
+        Payment yourCheck = new Check("Dan Rivas", "1243567876");
+        int actual = myCheck.compareTo(yourCheck);
+        assertEquals(0, actual);
+    }
+}

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

 package com.zipcoder.payment;
 
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
 public class PaymentPresenterTest {
+
+    @Test
+    public void paymentPresenterNoPaymentTest() {
+        Payment[] payments = new Payment[0];
+        PaymentPresenter presenter = new PaymentPresenter();
+        String expected = "";
+        String actual = presenter.toString(payments);
+        assertEquals(expected, actual);
+    }
+
+    @Test
+    public void paymentPresenterMultiplePaymentsTest() {
+        Payment[] payments = new Payment[2];
+        Payment paypal = new PayPal(4L, "Tia Mowry", "tia@mowry.com");
+        Payment check = new Check(81L, "Tia Mowry", "11432543", "134344551");
+
+        payments[0] = paypal;
+        payments[1] = check;
+
+        PaymentPresenter presenter = new PaymentPresenter();
+        String expected = "Check Tia Mowry ***4551\nPaypal Tia Mowry tia@mowry.com\n";
+        String actual = presenter.toString(payments);
+        assertEquals(expected, actual);
+    }
+
+    @Test
+    public void toStringByPayerNameTest() {
+        Payment[] payments = new Payment[2];
+        Payment paypal = new PayPal(4L, "Tamara Mowry", "tamara@mowry.com");
+        Payment check = new Check(81L, "Tia Mowry", "11432543", "134344551");
+
+        payments[0] = paypal;
+        payments[1] = check;
+
+        PaymentPresenter presenter = new PaymentPresenter();
+        String expected = "Paypal Tamara Mowry tamara@mowry.com\nCheck Tia Mowry ***4551\n";
+
+        String actual = presenter.toStringByPayerName(payments);
+        assertEquals(expected, actual);
+    }
+
+    @Test
+    public void toStringByIdTest() {
+        Payment[] payments = new Payment[2];
+        Payment paypal = new PayPal(120L, "Tamara Mowry", "tamara@mowry.com");
+        Payment check = new Check(81L, "Tia Mowry", "11432543", "134344551");
+
+        payments[0] = paypal;
+        payments[1] = check;
+
+        PaymentPresenter presenter = new PaymentPresenter();
+        String expected = "Paypal Tamara Mowry tamara@mowry.com\nCheck Tia Mowry ***4551\n";
+
+        String actual = presenter.toStringById(payments);
+        assertEquals(expected, actual);
+    }
 }

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

+package com.zipcoder.payment;
+
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+public class PaymentSortByPayerTest {
+
+    PaymentSortByPayer pmnt = new PaymentSortByPayer();
+
+    @Test
+    public void compareNegativeTest(){
+        Check myCheck = new Check("Dan Rivas", "1243567895");
+        PayPal pp = new PayPal("Shane McNaulty", "shane@loews.com");
+        int actual = pmnt.compare(myCheck, pp);
+        assertTrue(actual < 0);
+    }
+
+    @Test
+    public void comparePositiveTest(){
+        Check myCheck = new Check("Dan Rivas", "1243567895");
+        PayPal pp = new PayPal("Shane McNaulty", "shane@loews.com");
+        int actual = pmnt.compare(pp, myCheck);
+        assertTrue(actual > 0);
+    }
+
+    @Test
+    public void compareZeroTest(){
+        Payment myCheck = new Check("Dan Rivas", "1243567876");
+        Payment cc = new CreditCard();
+        ((CreditCard) cc).setPayerName("Dan Rivas");
+        int actual = pmnt.compare(cc, myCheck);
+        assertEquals(0, actual);
+    }
+}