Function setup

packages/client/lib/client/index.spec.ts:1483–1510

(
      socketOptions: Partial<RedisSocketOptions>,
      dropCount: number,
    )

    });

    async function setup(
      socketOptions: Partial<RedisSocketOptions>,
      dropCount: number,
    ) {
      const port = await getFreePortNumber();
      const server = setupMockServer(dropCount);
      const options = {
        ...{
          socket: {
            host: "localhost",
            port,
          },
          ...socketOptions,
        },
      };
      const client = createClient(options);
      const log = setupLog(client);
      await once(server.listen(port), "listening");
      return {
        log,
        client,
        server,
        teardown: async function () {
          client.destroy();
          server.close();
        },
      };
    }

    function setupLog(client: EventEmitter): string[] {
      const log: string[] = [];