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packages/testing/containers/services/redis.ts

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+import { RedisContainer } from '@testcontainers/redis';
+import type { StartedNetwork } from 'testcontainers';
+
+import { TEST_CONTAINER_IMAGES } from '../test-containers';
+import type { Service, ServiceResult } from './types';
+
+const HOSTNAME = 'redis';
+
+export interface RedisMeta {
+	host: string;
+	port: number;
+}
+
+export type RedisResult = ServiceResult<RedisMeta>;
+
+export const redis: Service<RedisResult> = {
+	description: 'Redis',
+	shouldStart: (ctx) => ctx.isQueueMode,
+
+	async start(network: StartedNetwork, projectName: string): Promise<RedisResult> {
+		const container = await new RedisContainer(TEST_CONTAINER_IMAGES.redis)
+			.withNetwork(network)
+			.withNetworkAliases(HOSTNAME)
+			.withLabels({
+				'com.docker.compose.project': projectName,
+				'com.docker.compose.service': HOSTNAME,
+			})
+			.withName(`${projectName}-${HOSTNAME}`)
+			.withReuse()
+			.start();
+
+		return {
+			container,
+			meta: {
+				host: HOSTNAME,
+				port: 6379,
+			},
+		};
+	},
+
+	env(result: RedisResult, external?: boolean): Record<string, string> {
+		const host = external ? result.container.getHost() : HOSTNAME;
+		const port = external ? String(result.container.getMappedPort(6379)) : '6379';
+		return {
+			// In container mode, EXECUTIONS_MODE is set by the stack based on worker count.
+			// In external/local mode, redis implies the user wants queue mode.
+			...(external ? { EXECUTIONS_MODE: 'queue' } : {}),
+			QUEUE_BULL_REDIS_HOST: host,
+			QUEUE_BULL_REDIS_PORT: port,
+			N8N_CACHE_ENABLED: 'true',
+			N8N_CACHE_BACKEND: 'redis',
+			N8N_CACHE_REDIS_HOST: host,
+			N8N_CACHE_REDIS_PORT: port,
+		};
+	},
+};