feat: adds testAddBusinessAccountWIthNoBusinessOwner

rm: businessCheckingAccount boolean (Its already throwing an exception in BankAtm addAccount)

Author: AmiyahJo

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

@@ -16,10 +16,6 @@ public class BusinessCheckingAccount extends CheckingAccount{
     public BusinessCheckingAccount(String accountNumber, Set<Customer> owners, String businessName, double initialBalance) {
         super(accountNumber, owners, initialBalance);
         this.businessName = businessName;
-
-        if (owners.stream().noneMatch(owner -> owner.isBusiness())) {
-            throw new IllegalArgumentException("At least one owner must be a business.");
-        }
     }   
 
     public String getBusinessName() {

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

@@ -5,6 +5,7 @@
 
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.assertj.core.api.Assertions.assertThatExceptionOfType;
+import static org.junit.jupiter.api.Assertions.assertThrows;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
 
@@ -48,6 +49,20 @@ void testAddAccount() {
     assertThat(accounts).containsOnly(account3);
   }
 
+  @Test
+  void testAddBusinessAccountWithNoBusinessOwner() {
+    // Arrange
+    Customer regularCustomer = new Customer(UUID.randomUUID(), "Bob's Bakery", false);  
+    CheckingAccount businessAccount = new BusinessCheckingAccount("666666666", Set.of(regularCustomer), "name", 500.0);
+
+    // Act & Assert
+    IllegalArgumentException thrown = assertThrows(IllegalArgumentException.class, () -> {
+        classUnderTest.addAccount(businessAccount);
+    });
+
+    assertThat(thrown).hasMessageContaining("At least one owning account must be a business account.");
+}
+
   @Test
   void testFindAccountsByCustomerId() {
     // Act