Added a session id.

tests/step_defs/page.py

@@ -3,6 +3,7 @@
 from urllib import request
 from urllib.error import HTTPError
 
+
 class Page:
     """Class for getting an individual page."""
 
@@ -13,10 +14,17 @@ class Page:
     def request_url(self, url):
         """Make a page request."""
         try:
-            self.res = request.urlopen(url)
+            page = request.urlopen(url)
         except HTTPError as err:
             self.res = err
+        else:
+            with page:
+                self.res = page
 
     def get_status_code(self):
         """Return the status code."""
         return self.res.status
+
+    def get_header(self, header):
+        """Did a session id get set."""
+        return self.res.headers[header]

tests/step_defs/test_session.py

@@ -0,0 +1,25 @@
+"""tests for server sessions."""
+
+from pytest_bdd import given, scenarios, then, when
+
+scenarios("../features/session.feature")
+
+
+@given("a running server")
+def start_server(server):
+    """Make a running server."""
+    server.set_safe_port()
+    server.start()
+
+
+@when("the home page is accessed")
+def access_home_page(server, page):
+    """Access the home page."""
+    url = f"http://{server.base_url}/"
+    page.request_url(url)
+
+
+@then("there is a session id")
+def confirm_session(page):
+    """Confirm session id exists."""
+    assert page.get_header("set-cookie")