Refine the session example to really do some work

Author: Zhen

test/examples/session_example.py

@@ -27,7 +27,7 @@ def __init__(self, uri, user, password):
         super(SessionExample, self).__init__(uri, user, password)
 
     # tag::session[]
-    def do_work(self):
+    def add_person(self, name):
         session = self._driver.session()
-        # TODO: something with the Session
+        session.run("CREATE (a:Person {name: $name})", {"name": name})
     # end::session[]

test/examples/test_examples.py

@@ -136,9 +136,10 @@ def test_session_example(self):
         from test.examples.session_example import SessionExample
 
         example = SessionExample(self.bolt_uri, self.user, self.password)
-        example.do_work()
+        example.add_person("Alice")
 
         self.assertIsInstance(example, SessionExample)
+        self.assertEqual(self.person_count("Alice"), 1)
 
     def test_transaction_function_example(self):
         from test.examples.transaction_function_example import TransactionFunctionExample