This library emulates ioredis by performing all operations in-memory. The best way to do integration testing against redis and ioredis is on a real redis-server instance. However, there are cases where mocking the redis-server is a better option.
- Your workflow already use a local redis-server instance for the dev server.
- You're on a platform without an official redis release, that's even worse than using an emulator.
- You're running tests on a CI, setting it up is complicated. If you combine it with CI that also run selenium acceptance testing it's even more complicated, as two redis-server instances on the same CI build is hard.
- The GitHub repo have bots that run the testing suite and is limited through npm package.json install scripts and can't fire up servers. (Having Greenkeeper notifying you when a new release of ioredis is out and wether your code breaks or not is awesome).
Check the compatibility table for supported redis commands.
var Redis = ;var redis =// `options.data` does not exist in `ioredis`, only `ioredis-mock`data:user_next: '3'emails:'firstname.lastname@example.org': 'email@example.com': '2''user:1': id: '1' username: 'superman' email: 'firstname.lastname@example.org''user:2': id: '2' username: 'batman' email: 'email@example.com';// Basically use it just like ioredis
We also support redis publish/subscribe channels (just like ioredis). Like ioredis, you need two clients:
- the pubSub client for subcriptions and events, which can only be used for subscriptions
- the usual client for issuing 'synchronous' commands like get, publish, etc
var Redis = ;var redisPubSub = ;// create a second Redis Mock (connected to redisPubSub)var redisSync = redisPubSub;redisPubSub;redisPubSub;redisSync;
By default, ioredis-mock uses the native Promise library. If you need (or prefer) bluebird promises, set
var Promise = ;var Redis = ;RedisPromise = Promise;
You can use the
defineCommand to define custom commands using lua or
eval to directly execute lua code.
You could define a custom command
MULTIPLY which accepts one
key and one argument. A redis key, where you can get the multiplicand, and an argument which will be the multiplicator:
var Redis = ;const redis = data: 'k1': 5 ;const commandDefinition: numberOfKeys: 1 lua: 'return KEYS1 * ARGV1' ;redis // defineCommand(name, definition)// now we can call our brand new multiply command as an ordinary command;
You can also achieve the same effect by using the
var Redis = ;const redis = data: k1: 5 ;const result = redis;;
note we are calling the ordinary redis
GET command by using the global
As a difference from ioredis we currently don't support:
- dynamic key number by passing the number of keys as the first argument of the command.
- automatic definition of the custom command buffer companion (i.e. for the custom command
multiplyBufferwhich returns values using
This project started off as just an utility in another project and got open sourced to benefit the rest of the ioredis community. This means there's work to do before it's feature complete:
- Setup testing suite for the library itself.
- Refactor to bluebird promises like ioredis, support node style callback too.
- Implement remaining basic features that read/write data.
- Implement ioredis argument and reply transformers.
- Connection Events
- Offline Queue
- Error Handling
- Implement remaining commands
I need a feature not listed here
Just create an issue and tell us all about it or submit a PR with it! 😄