chore(ci): migrate mysql/mysql + proof of concept proxy helper

.github/config/nodejs-dev.jsonc

@@ -100,6 +100,7 @@
     "auth",
     "batch",
     "cloud-language",
+    "cloud-sql/mysql/mysql",
     "cloud-tasks/snippets",
     "cloud-tasks/tutorial-gcf/app",
     "cloud-tasks/tutorial-gcf/function",

.github/config/nodejs-prod.jsonc

@@ -77,7 +77,6 @@
     // TODO: fix these
     "ai-platform/snippets", // PERMISSION_DENIED: Permission denied: Consumer 'projects/undefined' has been suspended.
     "automl", // (untested) FAILED_PRECONDITION: Google Cloud AutoML Natural Language was retired on March 15, 2024. Please migrate to Vertex AI instead
-    "cloud-sql/mysql/mysql", // (untested) Error: expected 200 "OK", got 500 "Internal Server Error"
     "cloud-sql/mysql/mysql2", // (untested) Error: Cannot find module './connect-connector-with-iam-authn.js'
     "cloud-sql/postgres/knex", // (untested) CloudSQLConnectorError: Malformed instance connection name provided: expected format of "PROJECT:REGION:INSTANCE", got undefined
     "cloud-sql/sqlserver/mssql", // (untested) TypeError: The "config.server" property is required and must be of type string.

cloud-sql/mysql/mysql/ci-setup.json

@@ -0,0 +1,10 @@
+{
+    "env": {
+      "INSTANCE_HOST": "127.0.0.1",
+      "CLOUD_SQL_CONNECTION_NAME": "nodejs-docs-samples-tests:us-central1:mysql-ci",
+      "DB_NAME": "kokoro_ci",
+      "DB_USER": "kokoro_ci"
+    },
+    "secrets": {
+      "DB_PASSWORD": "nodejs-docs-samples-tests/nodejs-docs-samples-sql-password"  }
+  }

cloud-sql/mysql/mysql/package.json

@@ -13,7 +13,7 @@
   },
   "scripts": {
     "start": "node server/server.js",
-    "system-test": "c8 mocha -p -j 2 test/server.test.js --timeout=60000 --exit",
+    "system-test": "test/proxy-setup.sh && c8 mocha -p -j 2 test/server.test.js --timeout=60000 --exit",
     "system-test-unix": "c8 mocha -p -j 2 test/server-unix.test.js --timeout=60000 --exit",
     "test": "npm run system-test && npm run system-test-unix"
   },

cloud-sql/mysql/mysql/test/proxy-setup.sh

@@ -0,0 +1,19 @@
+# Copyright 2025 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Proof of concept: setting up proxy
+
+curl -o cloud-sql-proxy https://storage.googleapis.com/cloud-sql-connectors/cloud-sql-proxy/v2.15.1/cloud-sql-proxy.linux.amd64
+chmod +x cloud-sql-proxy
+./cloud-sql-proxy $CLOUD_SQL_CONNECTION_NAME &