From e91e8e9c55c0c1b2541b9109ee373f5537ff682c Mon Sep 17 00:00:00 2001
From: Patrik Oldsberg <poldsberg@gmail.com>
Date: Wed, 21 Sep 2022 23:17:24 +0200
Subject: [PATCH] backend-test-utils: increase max connection pool size

Signed-off-by: Patrik Oldsberg <poldsberg@gmail.com>
---
 .changeset/stupid-dragons-complain.md                |  5 +++++
 .../backend-test-utils/src/database/TestDatabases.ts | 12 ++++++++++++
 2 files changed, 17 insertions(+)
 create mode 100644 .changeset/stupid-dragons-complain.md

diff --git a/.changeset/stupid-dragons-complain.md b/.changeset/stupid-dragons-complain.md
new file mode 100644
index 0000000000..44be8342bf
--- /dev/null
+++ b/.changeset/stupid-dragons-complain.md
@@ -0,0 +1,5 @@
+---
+'@backstage/backend-test-utils': patch
+---
+
+Increased test database max connection pool size to reduce the risk of resource exhaustion.
diff --git a/packages/backend-test-utils/src/database/TestDatabases.ts b/packages/backend-test-utils/src/database/TestDatabases.ts
index 76d12ce8f1..6ff1a2e6f7 100644
--- a/packages/backend-test-utils/src/database/TestDatabases.ts
+++ b/packages/backend-test-utils/src/database/TestDatabases.ts
@@ -28,6 +28,13 @@ import {
   TestDatabaseProperties,
 } from './types';
 
+const LARGER_POOL_CONFIG = {
+  pool: {
+    min: 0,
+    max: 50,
+  },
+};
+
 /**
  * Encapsulates the creation of ephemeral test database instances for use
  * inside unit or integration tests.
@@ -164,6 +171,9 @@ export class TestDatabases {
             new ConfigReader({
               backend: {
                 database: {
+                  knexConfig: properties.driver.includes('sqlite')
+                    ? {}
+                    : LARGER_POOL_CONFIG,
                   client: properties.driver,
                   connection: connectionString,
                 },
@@ -203,6 +213,7 @@ export class TestDatabases {
       new ConfigReader({
         backend: {
           database: {
+            knexConfig: LARGER_POOL_CONFIG,
             client: 'pg',
             connection: { host, port, user, password },
           },
@@ -228,6 +239,7 @@ export class TestDatabases {
       new ConfigReader({
         backend: {
           database: {
+            knexConfig: LARGER_POOL_CONFIG,
             client: 'mysql2',
             connection: { host, port, user, password },
           },