Resolves #2

src/bank.ts

@@ -14,4 +14,13 @@ export default class Bank {
         }
         this.accounts.push({ name, age, balance: 0, accountNumber: Math.floor(Math.random() * 100000) });
     }
+
+    getAccount(accountNumber: number): BankAccount | undefined {
+        if (this.accounts.find(account => account.accountNumber === accountNumber)) {
+            return this.accounts.find(account => account.accountNumber === accountNumber);
+        }
+        else {
+            throw new Error('Account not found');
+        }
+    }
 }

tests/bankTests.ts

@@ -16,11 +16,23 @@ describe('Bank class', () => {
             expect(account.balance).toBe(0);
             expect(account.accountNumber).toBeDefined();
         });
-    });
 
-    describe('createAccount', () => {
         it('should throw an error if age is negative', () => {
             expect(() => bank.createAccount('John Doe', -30)).toThrow('Age must be positive');
         });
     });
+
+    describe('getAccount', () => {
+        it('should return the correct account when a valid account number is provided', () => {
+            bank.createAccount('John Doe', 30);
+            const account = bank.accounts[0];
+            const foundAccount = bank.getAccount(account.accountNumber!);
+            expect(foundAccount).toEqual(account);
+        });
+
+        it('should throw an error when an invalid account number is provided', () => {
+            expect(() => bank.getAccount(12345)).toThrow('Account not found');
+        });
+    });
+
 });