Merge ~adam-collard/maas:faster-unit-tests into maas:master

[Adam Collard]

Add go faster stripes to postgresfixture

[MAAS Lander (maas-lander)]

UNIT TESTS
-b faster-unit-tests lp:~adam-collard/maas/+git/maas into -b master lp:~maas-committers/maas

STATUS: FAILED
LOG: http://maas-ci.internal:8080/job/maas/job/branch-tester/12027/console
COMMIT: 5eb672d7d65766883ca1c4e525b2a1534f651796

review: Needs Fixing

[Adam Collard (adam-collard)]

jenkins: !test

[Alberto Donato (ack)]

nice! +1

a couple of suggestion/nits inline

review: Approve

9ddbdf9... by Adam Collard on 2022-03-08

[ack's review] dedent, use Path.read_text()

diff --git a/src/maasserver/testing/resources.py b/src/maasserver/testing/resources.py
index ba8cb7b..8c465b7 100644
--- a/src/maasserver/testing/resources.py
+++ b/src/maasserver/testing/resources.py
@@ -9,6 +9,7 @@ import os
 from pathlib import Path
 import re
 from sys import __stderr__
+from textwrap import dedent
 
 from postgresfixture import ClusterFixture
 import psycopg2
@@ -47,6 +48,23 @@ class DatabaseClusterManager(TestResourceManager):
 
     def make(self, dependencies):
         cluster = ClusterFixture("db", preserve=True)
+        cluster.create()
+        postgres_path = Path(cluster.datadir)
+        postgres_conf = postgres_path / "postgresql.conf"
+        postgres_speed_conf = postgres_path / "postgresql.conf.speed"
+        if "postgresql.conf.speed" not in postgres_conf.read_text():
+            with postgres_conf.open("a") as fh:
+                fh.write("include = 'postgresql.conf.speed'\n")
+            with postgres_speed_conf.open("w") as fh:
+                fh.write(
+                    dedent(
+                        """\
+                    fsync = off
+                    full_page_writes = off
+                    synchronous_commit = off
+                    """
+                    )
+                )
         cluster.setUp()
         return cluster