feat:created files SavingAccount, Account, and SavingAccountTest, and the test for getAccountNumber passed

Author: brooklynharden

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

@@ -0,0 +1,19 @@
+package com.codedifferently.lesson17.bank;
+
+import java.util.Set;
+
+public interface Account {
+  String getAccountNumber();
+
+  Set<Customer> getOwners();
+
+  void deposit(double amount);
+
+  void withdraw(double amount);
+
+  double getBalance();
+
+  void closeAccount();
+
+  boolean isClosed();
+}

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

@@ -10,14 +10,14 @@
 public class BankAtm {
 
   private final Map<UUID, Customer> customerById = new HashMap<>();
-  private final Map<String, CheckingAccount> accountByNumber = new HashMap<>();
+  private final Map<String, Account> accountByNumber = new HashMap<>();
 
   /**
    * Adds a checking account to the bank.
    *
    * @param account The account to add.
    */
-  public void addAccount(CheckingAccount account) {
+  public void addAccount(Account account) {
     accountByNumber.put(account.getAccountNumber(), account);
     account
         .getOwners()
@@ -33,7 +33,7 @@ public void addAccount(CheckingAccount account) {
    * @param customerId The ID of the customer.
    * @return The unique set of accounts owned by the customer.
    */
-  public Set<CheckingAccount> findAccountsByCustomerId(UUID customerId) {
+  public Set<Account> findAccountsByCustomerId(UUID customerId) {
     return customerById.containsKey(customerId)
         ? customerById.get(customerId).getAccounts()
         : Set.of();
@@ -46,7 +46,7 @@ public Set<CheckingAccount> findAccountsByCustomerId(UUID customerId) {
    * @param amount The amount to deposit.
    */
   public void depositFunds(String accountNumber, double amount) {
-    CheckingAccount account = getAccountOrThrow(accountNumber);
+    Account account = getAccountOrThrow(accountNumber);
     account.deposit(amount);
   }
 
@@ -57,8 +57,12 @@ public void depositFunds(String accountNumber, double amount) {
    * @param check The check to deposit.
    */
   public void depositFunds(String accountNumber, Check check) {
-    CheckingAccount account = getAccountOrThrow(accountNumber);
-    check.depositFunds(account);
+    Account account = getAccountOrThrow(accountNumber);
+    if (account instanceof CheckingAccount) {
+      check.depositFunds(account);
+    } else {
+      System.out.println("Not a Checking Account");
+    }
   }
 
   /**
@@ -68,7 +72,7 @@ public void depositFunds(String accountNumber, Check check) {
    * @param amount
    */
   public void withdrawFunds(String accountNumber, double amount) {
-    CheckingAccount account = getAccountOrThrow(accountNumber);
+    Account account = getAccountOrThrow(accountNumber);
     account.withdraw(amount);
   }
 
@@ -78,8 +82,8 @@ public void withdrawFunds(String accountNumber, double amount) {
    * @param accountNumber The account number.
    * @return The account.
    */
-  private CheckingAccount getAccountOrThrow(String accountNumber) {
-    CheckingAccount account = accountByNumber.get(accountNumber);
+  private Account getAccountOrThrow(String accountNumber) {
+    Account account = accountByNumber.get(accountNumber);
     if (account == null || account.isClosed()) {
       throw new AccountNotFoundException("Account not found");
     }

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

@@ -45,7 +45,7 @@ public void voidCheck() {
    *
    * @param toAccount The account to deposit the check into.
    */
-  public void depositFunds(CheckingAccount toAccount) {
+  public void depositFunds(Account toAccount) {
     if (isVoided) {
       throw new CheckVoidedException("Check is voided");
     }

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

@@ -4,8 +4,7 @@
 import java.util.Set;
 
 /** Represents a checking account. */
-public class CheckingAccount {
-
+public class CheckingAccount implements Account {
   private final Set<Customer> owners;
   private final String accountNumber;
   private double balance;
@@ -30,6 +29,7 @@ public CheckingAccount(String accountNumber, Set<Customer> owners, double initia
    *
    * @return The account number.
    */
+  @Override
   public String getAccountNumber() {
     return accountNumber;
   }
@@ -39,6 +39,7 @@ public String getAccountNumber() {
    *
    * @return The owners of the account.
    */
+  @Override
   public Set<Customer> getOwners() {
     return owners;
   }
@@ -48,6 +49,7 @@ public Set<Customer> getOwners() {
    *
    * @param amount The amount to deposit.
    */
+  @Override
   public void deposit(double amount) throws IllegalStateException {
     if (isClosed()) {
       throw new IllegalStateException("Cannot deposit to a closed account");
@@ -64,6 +66,7 @@ public void deposit(double amount) throws IllegalStateException {
    * @param amount
    * @throws InsufficientFundsException
    */
+  @Override
   public void withdraw(double amount) throws InsufficientFundsException {
     if (isClosed()) {
       throw new IllegalStateException("Cannot withdraw from a closed account");
@@ -82,11 +85,13 @@ public void withdraw(double amount) throws InsufficientFundsException {
    *
    * @return The balance of the account.
    */
+  @Override
   public double getBalance() {
     return balance;
   }
 
   /** Closes the account. */
+  @Override
   public void closeAccount() throws IllegalStateException {
     if (balance > 0) {
       throw new IllegalStateException("Cannot close account with a positive balance");
@@ -99,6 +104,7 @@ public void closeAccount() throws IllegalStateException {
    *
    * @return True if the account is closed, otherwise false.
    */
+  @Override
   public boolean isClosed() {
     return !isActive;
   }

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

@@ -9,7 +9,7 @@ public class Customer {
 
   private final UUID id;
   private final String name;
-  private final Set<CheckingAccount> accounts = new HashSet<>();
+  private final Set<Account> accounts = new HashSet<>();
 
   /**
    * Creates a new customer.
@@ -41,11 +41,11 @@ public String getName() {
   }
 
   /**
-   * Adds a checking account to the customer.
+   * Adds an account to the customer.
    *
    * @param account The account to add.
    */
-  public void addAccount(CheckingAccount account) {
+  public void addAccount(Account account) {
     accounts.add(account);
   }
 
@@ -54,7 +54,7 @@ public void addAccount(CheckingAccount account) {
    *
    * @return The unique set of accounts owned by the customer.
    */
-  public Set<CheckingAccount> getAccounts() {
+  public Set<Account> getAccounts() {
     return accounts;
   }
 

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

@@ -0,0 +1,137 @@
+package com.codedifferently.lesson17.bank;
+
+import com.codedifferently.lesson17.bank.exceptions.InsufficientFundsException;
+import java.util.Set;
+
+/** Represents a savings account */
+public class SavingAccount implements Account {
+  private final Set<Customer> owners;
+  private final String accountNumber;
+  private double balance;
+  private boolean isActive;
+
+  /**
+   * Creates a new savings account.
+   *
+   * @param accountNumber The account number.
+   * @param owners The owners of the account.
+   * @param initialBalance The initial balance of the account.
+   */
+  public SavingAccount(String accountNumber, Set<Customer> owners, double initialBalance) {
+    this.accountNumber = accountNumber;
+    this.owners = owners;
+    this.balance = balance;
+    isActive = true;
+  }
+
+  /**
+   * Gets the account number.
+   *
+   * @return The account number.
+   */
+  @Override
+  public String getAccountNumber() {
+    return accountNumber;
+  }
+
+  /**
+   * Gets the owners of the account.
+   *
+   * @return The owners of the account.
+   */
+  @Override
+  public Set<Customer> getOwners() {
+    return owners;
+  }
+
+  /**
+   * Deposits funds into the account
+   *
+   * @param amount The amount to deposit.
+   */
+  @Override
+  public void deposit(double amount) throws IllegalStateException {
+    if (isClosed()) {
+      throw new IllegalStateException("Cannot deposit to a closed account");
+    }
+    if (amount <= 0) {
+      throw new IllegalArgumentException("Deposit amount must be positive");
+    }
+    balance += amount;
+  }
+
+  /**
+   * Withdraws funds from the account.
+   *
+   * @param amount
+   * @throws InsufficientFundsException
+   */
+  @Override
+  public void withdraw(double amount) throws InsufficientFundsException {
+    if (isClosed()) {
+      throw new IllegalStateException("Cannot withdraw from a closed account");
+    }
+    if (amount <= 0) {
+      throw new IllegalStateException("Withdrawal amount must be positive");
+    }
+    if (balance < amount) {
+      throw new InsufficientFundsException("Account does not have enough funds for withdrawal");
+    }
+    balance -= amount;
+  }
+
+  /**
+   * Gets the balance of the account.
+   *
+   * @return The balance of the account.
+   */
+  @Override
+  public double getBalance() {
+    return balance;
+  }
+
+  /** Closes the account. */
+  @Override
+  public void closeAccount() throws IllegalStateException {
+    if (balance > 0) {
+      throw new IllegalStateException("Cannot close account with a positive balance");
+    }
+    isActive = false;
+  }
+
+  /**
+   * Checks if the account is closed.
+   *
+   * @return True if the account is closed, otherwise false.
+   */
+  @Override
+  public boolean isClosed() {
+    return !isActive;
+  }
+
+  @Override
+  public int hashCode() {
+    return accountNumber.hashCode();
+  }
+
+  @Override
+  public boolean equals(Object obj) {
+    if (obj instanceof SavingAccount other) {
+      return accountNumber.equals(other.accountNumber);
+    }
+    return false;
+  }
+
+  @Override
+  public String toString() {
+    return "SavingAccount{"
+        + "accountNumber='"
+        + accountNumber
+        + '\''
+        + ", balance="
+        + balance
+        + ", isActive="
+        + isActive
+        + '}';
+  }
+}

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

@@ -43,14 +43,14 @@ void testAddAccount() {
     classUnderTest.addAccount(account3);
 
     // Assert
-    Set<CheckingAccount> accounts = classUnderTest.findAccountsByCustomerId(customer3.getId());
+    Set<Account> accounts = classUnderTest.findAccountsByCustomerId(customer3.getId());
     assertThat(accounts).containsOnly(account3);
   }
 
   @Test
   void testFindAccountsByCustomerId() {
     // Act
-    Set<CheckingAccount> accounts = classUnderTest.findAccountsByCustomerId(customer1.getId());
+    Set<Account> accounts = classUnderTest.findAccountsByCustomerId(customer1.getId());
 
     // Assert
     assertThat(accounts).containsOnly(account1, account2);