Done

pom.xml

     <groupId>com.zipcoder</groupId>
     <artifactId>payment</artifactId>
     <version>1.0-SNAPSHOT</version>
+    <dependencies>
+        <dependency>
+            <groupId>junit</groupId>
+            <artifactId>junit</artifactId>
+            <version>RELEASE</version>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
     <properties>
         <maven.compiler.source>1.8</maven.compiler.source>
         <maven.compiler.target>1.8</maven.compiler.target>

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

+package com.zipcoder.payment;
+
+public class Check implements Payment{
+
+
+    public long id;
+    String payerName;
+    String routingNumber;
+    String accountNumer;
+
+    public Check(long id, String payerName, String routingNumber, String accountNumer) {
+        this.id = id;
+        this.payerName = payerName;
+        this.routingNumber = routingNumber;
+        this.accountNumer = accountNumer;
+    }
+
+     public void setId(long id) {
+        this.id = id;
+    }
+
+    public long getId(){
+        return id;
+    };
+
+    public void setPayerName(String payerName) {
+        this.payerName = payerName;
+    }
+
+    public String getPayerName(){
+        return payerName;
+    };
+
+    public void setRoutingNumber(String routingNumber) {
+        this.routingNumber = routingNumber;
+    }
+
+    public String getRoutingNumber() {
+        return routingNumber;
+    }
+
+    public void setAccountNumer(String accountNumer) {
+        this.accountNumer = accountNumer;
+    }
+
+    public String getAccountNumer() {
+        return accountNumer;
+    }
+    public  String getShortDescription(){
+
+        String num1 = accountNumer.substring(accountNumer.length() - 4);
+        return "Check " + payerName + " ***" + num1;
+    };
+
+    public int compareTo(Payment o){
+            return this.getShortDescription().compareTo(o.getShortDescription());
+        }
+
+    }
+

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

+package com.zipcoder.payment;
+
+public class CreditCard implements Payment {
+
+    long Id;
+    String payerName;
+    String number;
+    int expiredMonth;
+    int expiredYear;
+
+
+    public CreditCard(long id, String payerName, String number, int expiredMonth, int expiredYear) {
+        this.Id = id;
+        this.payerName = payerName;
+        this.expiredMonth = expiredMonth;
+        this.expiredYear = expiredYear;
+        this.number = number;
+    }
+
+    public void setPayerName(String payerName) {
+        this.payerName = payerName;
+    }
+
+    public int getExpiredMonth() {
+        return expiredMonth;
+    }
+
+    public void setExpiredMonth(int expiredMonth) {
+        this.expiredMonth = expiredMonth;
+    }
+
+    public int getExpiredYear() {
+        return expiredYear;
+    }
+
+    public void setExpiredYear(int expiredYear) {
+        this.expiredYear = expiredYear;
+    }
+
+    public void setId(long id) {
+        this.Id = id;
+    }
+
+    public long getId() {
+        return Id;
+    }
+
+
+    public String getPayerName() {
+        return payerName;
+    }
+
+
+    public String getShortDescription() {
+
+        String number1 = number.substring(number.length() - 4);
+        return "CC " + payerName + "  " + number1 + " " + Integer.toString(expiredMonth) + "/" + Integer.toString(expiredYear);
+    }
+
+
+    public int compareTo(Payment o) {
+        return this.getShortDescription().compareTo(o.getShortDescription());
+    }
+}

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

+package com.zipcoder.payment;
+
+public class PayPal implements Payment{
+
+    public long id;
+    String payerName;
+    String email;
+
+    public PayPal(long id, String payerName, String email) {
+        this.id = id;
+        this.payerName = payerName;
+        this.email = email;
+    }
+
+    public void setPayerName(String payerName) {
+        this.payerName = payerName;
+    }
+
+    public String getEmail() {
+        return email;
+    }
+
+    public void setEmail(String email) {
+        this.email = email;
+    }
+
+    public void setId(long id) {
+        this.id = id;
+    }
+
+    public long getId(){
+        return id;
+    }
+    public String getPayerName(){
+        return payerName;
+    }
+    public  String getShortDescription(){
+        return "PayPal" + " " + payerName + " " + email;
+
+    }
+
+    public int compareTo(Payment o){
+        return this.getShortDescription().compareTo(o.getShortDescription());
+    }
+
+    }
+

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

+package com.zipcoder.payment;
+
+public interface Payment extends Comparable <Payment> {
+
+    public long getId();
+    public String getPayerName();
+    public  String getShortDescription();
+
+
+}

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

 
 public class PaymentPresenter {
 
+    public String toString(Payment[] payments) {
+        Payment temp;
+        for (int i = 0; i < payments.length; i++) {
+            for (int j = i + 1; j < payments.length; j++) {
+                if (payments[i].compareTo(payments[j]) > 0) {
+                    temp = payments[j];
+                    payments[j] = payments[i];
+                    payments[i] = temp;
+                }
+            }
+        }
 
-}
+        String paymentsList = "";
+        for (Payment payment : payments) {
+            paymentsList += payment.getShortDescription() + " \n ";
+        }
+        return paymentsList;
+    }
+
+    public String toStringByPayerName(Payment[] payments) {
+        PaymentSortByPayer paymentSortByPayer = new PaymentSortByPayer();
+        Payment temp;
+        for (int i = 0; i < payments.length; i++) {
+            for (int j = i + 1; j < payments.length; j++) {
+                if (paymentSortByPayer.compare(payments[i], (payments[j])) > 0) {
+                    temp = payments[j];
+                    payments[j] = payments[i];
+                    payments[i] = temp;
+                }
+            }
+        }
+
+        String paymentsList = " ";
+        for (Payment payment : payments) {
+            paymentsList += payment.getShortDescription() + "\n";
+        }
+        return paymentsList;
+    }
+
+    public String toStringById(Payment[] payments) {
+        Payment temp;
+        for (int i = 0; i < payments.length; i++) {
+            for (int j = i + 1; j < payments.length; j++) {
+                if (payments[i].getId() > payments[j].getId()) {
+                    temp = payments[j];
+                    payments[j] = payments[i];
+                    payments[i] = temp;
+                }
+            }
+        }
+
+        String paymentsList = "";
+        for (Payment payment : payments) {
+            paymentsList += payment.getShortDescription() + "\n";
+        }
+        return paymentsList;
+    }
+}

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

+package com.zipcoder.payment;
+
+import java.util.Comparator;
+
+public class PaymentSortByPayer implements Comparator <Payment> {
+
+    @Override
+    public int compare(Payment o1, Payment o2) {
+        return o1.getPayerName().compareTo(o2.getPayerName());
+    }
+}

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

+package com.zipcoder.payment;
+
+import org.junit.Assert;
+import org.junit.Test;
+
+public class CheckTest {
+
+    CreditCard creditCard = new CreditCard(001, "Nira Parikh", "123456789876", 10, 2020);
+    Check check = new Check(002, "Nira Parikh", "031100089", "123456789");
+    PayPal payPal = new PayPal(003, "Nira Parikh", "angellegna@gmail.com");
+
+    @Test
+    public void testGetShortDescription(){
+        String expected = "Check Nira Parikh ***6789";
+        String actual = check.getShortDescription();
+        Assert.assertEquals(expected,actual);
+    }
+
+
+    @Test
+    public void testCompareTo_CheckToCC(){
+        Assert.assertTrue(check.compareTo(creditCard) > 0);
+    }
+
+    @Test
+    public void testCompareTo_CheckToPayPal(){
+        Assert.assertTrue(check.compareTo(payPal) < 0);
+
+    }
+
+}

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

+package com.zipcoder.payment;
+
+import org.junit.Assert;
+import org.junit.Test;
+
+public class CreditCardTest {
+    CreditCard creditCard = new CreditCard(001, "Nira Parikh", "123456789876", 10, 2020);
+    Check check = new Check(002, "Nira Parikh", "031100089", "123456789");
+    PayPal payPal = new PayPal(003, "Nira Parikh", "angellegna@gmail.com");
+
+    @Test
+    public void testGetShortDescription(){
+        String expected = "CC Nira Parikh  9876 10/2020";
+        String actual = creditCard.getShortDescription();
+
+        Assert.assertEquals(expected,actual);
+    }
+    @Test
+    public void testCompareTo_CCToPayPal(){
+        Assert.assertTrue(creditCard.compareTo(payPal) < 0);
+
+    }
+
+    @Test
+    public void testCompareTo_CCToCheck(){
+        Assert.assertTrue(creditCard.compareTo(check) < 0);
+
+
+    }
+}
+

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

+package com.zipcoder.payment;
+
+import org.junit.Assert;
+import org.junit.Test;
+
+public class PayPalTest {
+
+    CreditCard creditCard = new CreditCard(001, "Nira Parikh", "123456789876", 10, 2020);
+    Check check = new Check(002, "Nira Parikh", "031100089", "123456789");
+    PayPal payPal = new PayPal(003, "Nira Parikh", "angellegna@gmail.com");
+
+    @Test
+    public void testGetShortDescription() {
+        String expected = "PayPal Nira Parikh angellegna@gmail.com";
+        String actual = payPal.getShortDescription();
+
+        Assert.assertEquals(expected, actual);
+    }
+
+    @Test
+    public void testCompareTo_PaypalToCC() {
+        Assert.assertTrue(payPal.compareTo(creditCard) > 0);
+    }
+
+    @Test
+    public void testCompareTo_PaypalToCheck() {
+        Assert.assertTrue(payPal.compareTo(check) > 0);
+    }
+}

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

 package com.zipcoder.payment;
 
+import org.junit.Assert;
+import org.junit.Test;
+
 public class PaymentPresenterTest {
-}
+
+    @Test
+    public void testToString_NoPayments() {
+        Payment[] payments = new Payment[0];
+        PaymentPresenter presenter = new PaymentPresenter();
+        String expected = "";
+
+        String actual = presenter.toString(payments);
+
+        Assert.assertEquals(expected, actual);
+    }
+
+    @Test
+    public void toString_Payments() {
+        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 \n PayPal Tia Mowry tia@mowry.com\n";
+
+        String actual = presenter.toString(payments);
+        Assert.assertEquals(expected, actual);
+    }
+
+    @Test
+    public void toStringByPayerName(){
+        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);
+        Assert.assertEquals(expected, actual);
+    }
+
+    @Test
+    public void toStringbyId(){
+        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 = "Check Tia Mowry ***4551\nPayPal Tamara Mowry tamara@mowry.com\n";
+
+        String actual = presenter.toStringById(payments);
+        Assert.assertEquals(expected, actual);
+    }
+
+}

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

+package com.zipcoder.payment;
+
+import org.junit.Assert;
+import org.junit.Test;
+
+public class PaymentSortByPayerTest {
+    CreditCard creditCard = new CreditCard(001, "Nira Parikh", "123456789876", 10, 2020);
+    Check check = new Check(002, "Nira Parikh", "031100089", "123456789");
+    PayPal payPal = new PayPal(003, "Nira Parikh", "angellegna@gmail.com");
+
+    PaymentSortByPayer paymentSortByPayer = new PaymentSortByPayer();
+
+
+    @Test
+    public void testCompare_SameName(){
+       Assert.assertTrue(paymentSortByPayer.compare(check, creditCard) == 0);
+
+    }
+
+    @Test
+    public void testCompare_SmallerLarger(){
+
+        Assert.assertTrue(paymentSortByPayer.compare(check, payPal) < 0);
+    }
+
+    @Test
+    public void testCompare_LargerSmaller(){
+        Assert.assertTrue(paymentSortByPayer.compare(payPal, creditCard) > 0);
+
+    }
+
+}