Merge ~bjornt/maas:perftest-websocket-machine-list-all into maas:master

[Björn Tillenius]

Add a performance test for listing all machines with the websocket.

With this it's easier to track what the default page size should be.

[MAAS Lander (maas-lander)]

UNIT TESTS
-b perftest-websocket-machine-list-all lp:~bjornt/maas/+git/maas into -b master lp:~maas-committers/maas

STATUS: SUCCESS
COMMIT: 346e64038f0aa3addf3fedbad472029ed11ca73e

review: Approve

[Alberto Donato (ack)]

+1

review: Approve

diff --git a/src/maasperf/tests/maasserver/websockets/test_machines.py b/src/maasperf/tests/maasserver/websockets/test_machines.py
index b4cd181..7fcf8b5 100644
--- a/src/maasperf/tests/maasserver/websockets/test_machines.py
+++ b/src/maasperf/tests/maasserver/websockets/test_machines.py
@@ -1,12 +1,15 @@
 # Copyright 2022 Canonical Ltd.  This software is licensed under the
 # GNU Affero General Public License version 3 (see the file LICENSE).
 
+from maasserver.models import Machine
 from maasserver.websockets.handlers.machine import MachineHandler
 from maastesting.perftest import perf_test, profile
 
 
 @perf_test(db_only=True)
 def test_perf_list_machines_Websocket_endpoint(admin):
+    # This should test the websocket calls that are used to load
+    # the machine listing page on the initial page load.
     with profile("test_perf_list_machines_Websocket_endpoint"):
         ws_handler = MachineHandler(admin, {}, None)
         # Extracted from a clean load of labmaas with empty local
@@ -21,3 +24,22 @@ def test_perf_list_machines_Websocket_endpoint(admin):
             "sort_key": "hostname",
         }
         ws_handler.list(params)
+
+
+@perf_test(db_only=True)
+def test_perf_list_machines_Websocket_endpoint_all(admin):
+    # How long would it take to list all the machines using the
+    # websocket without any pagination.
+    machine_count = Machine.objects.all().count()
+    with profile("test_perf_list_machines_Websocket_endpoint_all"):
+        ws_handler = MachineHandler(admin, {}, None)
+        # Extracted from a clean load of labmaas with empty local
+        # storage
+        params = {
+            "filter": {},
+            "page_number": 1,
+            "page_size": machine_count + 1,
+            "sort_direction": "descending",
+            "sort_key": "hostname",
+        }
+        ws_handler.list(params)