Adding chapter 5 source code

Chapter5/mypytest/tests/test_myadd3.py

@@ -0,0 +1,32 @@
+# test_myadd3.py test suite for myadd function
+
+import pytest
+from mypytest.src.myadd3 import add
+
+
+def test_add1():
+    """ test case to validate two positive numbers"""
+    assert add(10, 5) == 15
+
+
+def test_add2():
+    """ test case to validate two positive numbers"""
+    assert add(10, -5) == 5, "should be 5"
+
+def test_add3():
+    """ test case to validate two positive numbers"""
+    assert add(-10, 5) == -5
+
+def test_add4():
+    """ test case to validate two positive numbers"""
+    assert add(-10, -5) == -15
+
+def ttest_typeerror1():
+    """ test case to check if we can handle non number input"""
+    with pytest.raises(TypeError):
+        add('a', 5)
+
+def ttest_typeerror2():
+    """ test case to check if we can handle non number input"""
+    with pytest.raises(TypeError, match="only numbers are allowed"):
+        add('a', 'b')