Confirmed restart did not change session id.

tests/features/session.feature

@@ -6,3 +6,9 @@ Feature: Session
 		Given a running server
 		When the home page is accessed
 		Then there is a default session id
+
+	Scenario: Session ID is retained after restart
+		Given a running server
+		And the home page is accessed
+		When the server is restarted
+		Then the session id remains the same

tests/step_defs/conftest.py

@@ -4,6 +4,7 @@ from pytest import fixture
 from .server import Server
 from .page import Page
 
+
 @fixture
 def server():
     """Create a server instance."""
@@ -11,7 +12,14 @@ def server():
     yield serv
     serv.destroy()
 
+
 @fixture
 def page():
-    pg = Page()
-    return pg
+    """Return a page for testing."""
+    return Page()
+
+
+@fixture
+def data_store():
+    """Return a dictionary to hold between function test data."""
+    return {}

tests/step_defs/test_session.py

@@ -1,10 +1,23 @@
 """tests for server sessions."""
 
+from time import sleep
 from pytest_bdd import given, scenarios, then, when
 
+SESSION_NAME = "morethantext.sid"
+
 scenarios("../features/session.feature")
 
 
+def get_session_id(page):
+    """Pulls the session id cookie."""
+    cookies = page.get_cookies()
+    id_cookie = None
+    for holder in cookies:
+        if holder.name == SESSION_NAME:
+            id_cookie = holder
+    return id_cookie
+
+
 @given("a running server")
 def start_server(server):
     """Make a running server."""
@@ -12,6 +25,14 @@ def start_server(server):
     server.start()
 
 
+@given("the home page is accessed")
+def store_session_id(server, page, data_store):
+    """Store the session id."""
+    page.request_url(f"http://{server.base_url}/")
+    cookie = get_session_id(page)
+    data_store["session"] = cookie.value
+
+
 @when("the home page is accessed")
 def access_home_page(server, page):
     """Access the home page."""
@@ -19,13 +40,27 @@ def access_home_page(server, page):
     page.request_url(url)
 
 
+@when("the server is restarted")
+def restart_server(server):
+    """Restarts the server"""
+    server.stop()
+    sleep(1)
+    server.start()
+
+
 @then("there is a default session id")
 def confirm_session(page):
     """Confirm session id exists."""
-    cookies = page.get_cookies()
-    name = "morethantext.sid"
-    cookie = None
-    for holder in cookies:
-        if holder.name == name:
-            cookie = holder
-    assert cookie, f"Did not find cookie {name}, but retrieved {cookies}"
+    assert get_session_id(
+        page
+    ), f"Did not find cookie {SESSION_NAME}, but retrieved {page.get_cookies()}"
+
+
+@then("the session id remains the same")
+def check_session_id(page, data_store):
+    """Checks the new session with the old."""
+    cookie = get_session_id(page)
+    session = cookie.value
+    assert (
+        session == data_store["session"]
+    ), f"Session id became {session} but should have been {data_store['session']}"