feat(MySQL Node): Overhaul

packages/nodes-base/nodes/MySql/v2/methods/credentialTest.ts

@@ -0,0 +1,44 @@
+import type {
+	ICredentialDataDecryptedObject,
+	ICredentialsDecrypted,
+	ICredentialTestFunctions,
+	INodeCredentialTestResult,
+} from 'n8n-workflow';
+
+import { createPool } from '../transport';
+
+import { Client } from 'ssh2';
+
+export async function mysqlConnectionTest(
+	this: ICredentialTestFunctions,
+	credential: ICredentialsDecrypted,
+): Promise<INodeCredentialTestResult> {
+	const credentials = credential.data as ICredentialDataDecryptedObject;
+
+	let sshClient: Client | undefined = undefined;
+
+	if (credentials.sshTunnel) {
+		sshClient = new Client();
+	}
+	const pool = await createPool(credentials, {}, sshClient);
+
+	try {
+		const connection = await pool.getConnection();
+		connection.release();
+	} catch (error) {
+		return {
+			status: 'Error',
+			message: error.message,
+		};
+	} finally {
+		if (sshClient) {
+			sshClient.end();
+		}
+		await pool.end();
+	}
+
+	return {
+		status: 'OK',
+		message: 'Connection successful!',
+	};
+}