Create test_loans.py

tests/test_loans.py

@@ -0,0 +1,23 @@
+import unittest
+from loans import LoanManager  # Assuming you have a LoanManager class
+
+class TestLoanManager(unittest.TestCase):
+    def setUp(self):
+        self.loan_manager = LoanManager()
+
+    def test_create_loan(self):
+        loan = self.loan_manager.create_loan("Alice", 1000, 5)
+        self.assertIsNotNone(loan)
+        self.assertEqual(loan.amount, 1000)
+
+    def test_loan_repayment(self):
+        loan = self.loan_manager.create_loan("Bob", 500, 3)
+        self.loan_manager.repay_loan(loan.id, 200)
+        self.assertEqual(loan.remaining_balance, 300)
+
+    def test_loan_not_found(self):
+        with self.assertRaises(ValueError):
+            self.loan_manager.repay_loan("nonexistent_id", 100)
+
+if __name__ == "__main__":
+    unittest.main()