Adding chapter 5 source code

Chapter5/mypytest/tests/test_myadd5.py

@@ -0,0 +1,14 @@
+# test_myadd5.py test suite using parameterize marker
+import sys
+
+import pytest
+from mypytest.src.myadd3 import add
+
+@pytest.mark.parametrize("x,y,ans",
+                         [(10,5,15),(10,-5,5),
+                          (-10,5,-5),(-10,-5,-15)],
+                         ids=["pos-pos","pos-neg",
+                              "neg-pos", "neg-neg"])
+def test_add(x, y, ans):
+    """ test case to validate two positive numbers"""
+    assert add(x, y) == ans