intial commit

test_main.py

@@ -0,0 +1,16 @@
+import unittest
+from main import add, subtract
+
+
+class TestCalculator(unittest.TestCase):
+    def test_add(self):
+        self.assertEqual(add(2, 3), 5)
+        self.assertEqual(add(-1, 1), 0)
+
+    def test_subtract(self):
+        self.assertEqual(subtract(5, 2), 3)
+        self.assertEqual(subtract(0, 1), -1)
+
+
+if __name__ == "__main__":
+    unittest.main()