node-redis/test/commands/mget.spec.js

'use strict'

var assert = require('assert')
var config = require('../lib/config')
var helper = require('../helper')
var redis = config.redis

describe('The \'mget\' method', function () {
  helper.allTests(function (ip, args) {
    describe('using ' + ip, function () {
      var client

      beforeEach(function (done) {
        client = redis.createClient.apply(null, args)
        client.once('error', done)
        client.once('ready', function () {
          client.flushdb()
          client.mset(['mget keys 1', 'mget val 1', 'mget keys 2', 'mget val 2', 'mget keys 3', 'mget val 3'], done)
        })
      })

      it('handles fetching multiple keys in argument form', function (done) {
        client.mset(['mget keys 1', 'mget val 1', 'mget keys 2', 'mget val 2', 'mget keys 3', 'mget val 3'], helper.isString('OK'))
        client.mget('mget keys 1', 'mget keys 2', 'mget keys 3', function (err, results) {
          assert.strictEqual(3, results.length)
          assert.strictEqual('mget val 1', results[0].toString())
          assert.strictEqual('mget val 2', results[1].toString())
          assert.strictEqual('mget val 3', results[2].toString())
          return done(err)
        })
      })

      it('handles fetching multiple keys via an array', function (done) {
        client.mget(['mget keys 1', 'mget keys 2', 'mget keys 3'], function (err, results) {
          assert.strictEqual('mget val 1', results[0].toString())
          assert.strictEqual('mget val 2', results[1].toString())
          assert.strictEqual('mget val 3', results[2].toString())
          return done(err)
        })
      })

      it('handles fetching multiple keys, when some keys do not exist', function (done) {
        client.mget('mget keys 1', ['some random shit', 'mget keys 2', 'mget keys 3'], function (err, results) {
          assert.strictEqual(4, results.length)
          assert.strictEqual('mget val 1', results[0].toString())
          assert.strictEqual(null, results[1])
          assert.strictEqual('mget val 2', results[2].toString())
          assert.strictEqual('mget val 3', results[3].toString())
          return done(err)
        })
      })

      it('handles fetching multiple keys, when some keys do not exist promisified', function () {
        return client.mgetAsync('mget keys 1', ['some random shit', 'mget keys 2', 'mget keys 3']).then(function (results) {
          assert.strictEqual(4, results.length)
          assert.strictEqual('mget val 1', results[0].toString())
          assert.strictEqual(null, results[1])
          assert.strictEqual('mget val 2', results[2].toString())
          assert.strictEqual('mget val 3', results[3].toString())
        })
      })

      afterEach(function () {
        client.end(true)
      })
    })
  })
})