Added integration testing.

tests/step_defs/test_server_start.py

@@ -0,0 +1,25 @@
+"""Interpratures for server start features."""
+
+from pytest_bdd import given, scenarios, then, when
+
+scenarios("../features/server_start.feature")
+
+@given("a server")
+def create_server(server):
+    """Set up a server."""
+
+@given("it is running")
+def start_server(server):
+    """Start up the server."""
+    server.start()
+
+@when("the home page is accessed")
+def access_home_page(server, page):
+    """Access the home page."""
+    url = f"http://{server.settings['address']}:{server.settings['port']}/"
+    page.request_url(url)
+
+@then("the status should be OK")
+def check_for_ok(page):
+    """Is the page status code 200"""
+    assert page.get_status_code() == 200