• String: https://redis.io/topics/data-types

• PING: https://redis.io/commands/ping
• GET: https://redis.io/commands/get
• SET: https://redis.io/commands/set
• STRLEN: https://redis.io/commands/strlen
• DEL: https://redis.io/commands/del
• EXISTS: https://redis.io/commands/exists

• redis-cli, the Redis command line interface`: https://redis.io/topics/rediscli
• man redis-cli: https://www.mankier.com/1/redis-cli

See "Getting input from other programs" section in https://redis.io/topics/rediscli .

You don't need to implement inline command (e.g. redis-cli redis_command).

• -h: hostname
• --raw: raw output mode (you don't need to implement no-raw mode)

See src/README.md.

We use Docker for testing. Install Docker before testing.

$ ./scripts/build-container.sh

$ ./scripts/test.sh

$ SERVER_IMAGE=redis ./scripts/test.sh

$ SERVER_IMAGE=redis CLIENT_IMAGE=student-redis ./scripts/test.sh

$ SERVER_IMAGE=redis CLIENT_IMAGE=redis ./scripts/test.sh