added thetest cases

Author: ns loni

requirements.txt

@@ -0,0 +1,2 @@
+pandas
+pytest

src/__init__.py

@@ -0,0 +1,5 @@
+def add(a,b):
+    return a+b
+
+def sub(a,b):
+    return a-b

src/math_operation.py

@@ -0,0 +1,13 @@
+from src.math_operation import add, sub
+
+def test_add():
+    assert add(2,3) == 5
+    assert add(-1, 1) == 0
+    assert sub(5,3) == 2
+    
+def test_sub():
+    assert sub(5,3) == 2
+    assert sub(4,3) == 1
+    assert sub(3,3) == 0
+    assert sub(2,3) == -1    
+