implemented Saving account and BusinessCheckingAccount functions and tests

Author: htanweer244

lesson_17/bank/bank_app/src/main/java/com/codedifferently/lesson17/bank/BankAtm.java

@@ -18,6 +18,15 @@ public class BankAtm {
    * @param account The account to add.
    */
   public void addAccount(CheckingAccount account) {
+    if (account instanceof BusinessCheckingAccount) {
+      // Check if at least one of the owners is a business customer
+      boolean hasBusinessOwner = account.getOwners().stream().anyMatch(Customer::isBusiness);
+
+      if (!hasBusinessOwner) {
+        throw new IllegalArgumentException(
+            "At least one owner must be a business customer for a BusinessCheckingAccount.");
+      }
+    }
     accountByNumber.put(account.getAccountNumber(), account);
     account
         .getOwners()

lesson_17/bank/bank_app/src/main/java/com/codedifferently/lesson17/bank/BusinessAccount.java

@@ -0,0 +1,5 @@
+package com.codedifferently.lesson17.bank;
+
+public interface BusinessAccount {
+  boolean isBusiness();
+}

lesson_17/bank/bank_app/src/main/java/com/codedifferently/lesson17/bank/BusinessCheckingAccount.java

@@ -0,0 +1,15 @@
+package com.codedifferently.lesson17.bank;
+
+import java.util.Set;
+
+public class BusinessCheckingAccount extends CheckingAccount implements BusinessAccount {
+
+  public BusinessCheckingAccount(String accountNumber, Set<Customer> owners, double balance) {
+    super(accountNumber, owners, balance);
+  }
+
+  @Override
+  public boolean isBusiness() {
+    return true;
+  }
+}

lesson_17/bank/bank_app/src/main/java/com/codedifferently/lesson17/bank/CheckingAccount.java

@@ -7,7 +7,7 @@
 public class CheckingAccount {
 
   private final Set<Customer> owners;
-  private final String accountNumber;
+  final String accountNumber;
   private double balance;
   private boolean isActive;
 

lesson_17/bank/bank_app/src/main/java/com/codedifferently/lesson17/bank/Customer.java

@@ -9,6 +9,7 @@ public class Customer {
 
   private final UUID id;
   private final String name;
+  private final boolean isBusiness;
   private final Set<CheckingAccount> accounts = new HashSet<>();
 
   /**
@@ -17,9 +18,10 @@ public class Customer {
    * @param id The ID of the customer.
    * @param name The name of the customer.
    */
-  public Customer(UUID id, String name) {
+  public Customer(UUID id, String name, boolean isBusiness) {
     this.id = id;
     this.name = name;
+    this.isBusiness = isBusiness;
   }
 
   /**
@@ -31,6 +33,10 @@ public UUID getId() {
     return id;
   }
 
+  public boolean isBusiness() {
+    return isBusiness;
+  }
+
   /**
    * Gets the name of the customer.
    *

lesson_17/bank/bank_app/src/main/java/com/codedifferently/lesson17/bank/SavingAccount.java

@@ -7,7 +7,7 @@
 public class SavingAccount {
 
   private final Set<Customer> owners;
-  private final String accountNumber;
+  final String accountNumber;
   private double balance;
   private boolean isActive;
 

lesson_17/bank/bank_app/src/test/java/com/codedifferently/lesson17/bank/BankAtmTest.java

@@ -21,8 +21,8 @@ class BankAtmTest {
   @BeforeEach
   void setUp() {
     classUnderTest = new BankAtm();
-    customer1 = new Customer(UUID.randomUUID(), "John Doe");
-    customer2 = new Customer(UUID.randomUUID(), "Jane Smith");
+    customer1 = new Customer(UUID.randomUUID(), "John Doe", false);
+    customer2 = new Customer(UUID.randomUUID(), "Jane Smith", false);
     account1 = new CheckingAccount("123456789", Set.of(customer1), 100.0);
     account2 = new CheckingAccount("987654321", Set.of(customer1, customer2), 200.0);
     customer1.addAccount(account1);
@@ -35,7 +35,7 @@ void setUp() {
   @Test
   void testAddAccount() {
     // Arrange
-    Customer customer3 = new Customer(UUID.randomUUID(), "Alice Johnson");
+    Customer customer3 = new Customer(UUID.randomUUID(), "Alice Johnson", false);
     CheckingAccount account3 = new CheckingAccount("555555555", Set.of(customer3), 300.0);
     customer3.addAccount(account3);
 

lesson_17/bank/bank_app/src/test/java/com/codedifferently/lesson17/bank/CheckingAccountTest.java

@@ -20,8 +20,8 @@ class CheckingAccountTest {
   @BeforeEach
   void setUp() {
     owners = new HashSet<>();
-    owners.add(new Customer(UUID.randomUUID(), "John Doe"));
-    owners.add(new Customer(UUID.randomUUID(), "Jane Smith"));
+    owners.add(new Customer(UUID.randomUUID(), "John Doe", false));
+    owners.add(new Customer(UUID.randomUUID(), "Jane Smith", false));
     classUnderTest = new CheckingAccount("123456789", owners, 100.0);
   }
 

lesson_17/bank/bank_app/src/test/java/com/codedifferently/lesson17/bank/SavingAccountTest.java

@@ -12,15 +12,16 @@
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
 
-public class SavingAccountTest {
+class SavingAccountTest {
+
   private SavingAccount classUnderTest;
   private Set<Customer> owners;
 
   @BeforeEach
   void setUp() {
     owners = new HashSet<>();
-    owners.add(new Customer(UUID.randomUUID(), "John Doe"));
-    owners.add(new Customer(UUID.randomUUID(), "Jane Smith"));
+    owners.add(new Customer(UUID.randomUUID(), "John Doe", false));
+    owners.add(new Customer(UUID.randomUUID(), "Jane Smith", false));
     classUnderTest = new SavingAccount("123456789", owners, 100.0);
   }