Adding chapter 5 source code

Chapter5/mypytest/tests/test_myadd4.py

@@ -0,0 +1,24 @@
+# test_myadd4.py test suite for myadd function using markers
+import sys
+
+import pytest
+from mypytest.src.myadd3 import add
+
+@pytest.mark.skip
+def test_add1():
+    """ test case to validate two positive numbers"""
+    assert add(10, 5) == 15
+
+@pytest.mark.skipif(sys.version_info > (3,6),
+                    reason=" skipped for release > than Python 3.6")
+def test_add2():
+    """ test case to validate two positive numbers"""
+    assert add(10, -5) == 5, "should be 5"
+
+@pytest.mark.xfail(sys.platform == "darwin",
+                   reason="ignore exception for mac")
+def test_add3():
+    """ test case to validate two positive numbers"""
+    assert add(-10, 5) == -5
+    raise Exception()
+