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

'use strict'

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

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

      beforeEach(function (done) {
        client = redis.createClient.apply(null, args)
        client.once('ready', function () {
          client.flushdb(done)
        })
      })

      it('sets key if it does not have a value', function (done) {
        client.setnx('foo', 'banana', helper.isNumber(1))
        client.get('foo', helper.isString('banana', done))
      })

      it('does not set key if it already has a value', function (done) {
        client.set('foo', 'bar', helper.isString('OK'))
        client.setnx('foo', 'banana', helper.isNumber(0))
        client.get('foo', helper.isString('bar', done))
      })

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