Create test_defi.py

tests/test_defi.py

@@ -0,0 +1,22 @@
+import unittest
+from defi import DeFiManager  # Assuming you have a DeFiManager class
+
+class TestDeFiManager(unittest.TestCase):
+    def setUp(self):
+        self.defi_manager = DeFiManager()
+
+    def test_stake_tokens(self):
+        result = self.defi_manager.stake_tokens("Alice", 100)
+        self.assertTrue(result)
+
+    def test_withdraw_tokens(self):
+        self.defi_manager.stake_tokens("Bob", 200)
+        result = self.defi_manager.withdraw_tokens("Bob", 100)
+        self.assertTrue(result)
+
+    def test_insufficient_balance(self):
+        with self.assertRaises(ValueError):
+            self.defi_manager.withdraw_tokens("Charlie", 100)
+
+if __name__ == "__main__":
+    unittest.main()