first commit

packages/cli/test/teardown.ts

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+import 'tsconfig-paths/register';
+import { testDb } from '@n8n/backend-test-utils';
+import { GlobalConfig } from '@n8n/config';
+import { Container } from '@n8n/di';
+import { DataSource as Connection } from '@n8n/typeorm';
+
+export default async () => {
+	const { type: dbType } = Container.get(GlobalConfig).database;
+	if (dbType !== 'postgresdb') return;
+
+	const connection = new Connection(testDb.getBootstrapDBOptions());
+	await connection.initialize();
+
+	const query = 'SELECT datname as "Database" FROM pg_database';
+	const results: Array<{ Database: string }> = await connection.query(query);
+	const databases = results
+		.filter(({ Database: dbName }) => dbName.startsWith(testDb.testDbPrefix))
+		.map(({ Database: dbName }) => dbName);
+
+	const promises = databases.map(
+		async (dbName) => await connection.query(`DROP DATABASE ${dbName};`),
+	);
+	await Promise.all(promises);
+	await connection.destroy();
+};