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

'use strict'

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

describe('The \'get\' method', function () {
  helper.allTests(function (ip, args) {
    describe('using ' + ip, function () {
      var key, value

      beforeEach(function () {
        key = uuid.v4()
        value = uuid.v4()
      })

      describe('when not connected', function () {
        var client

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

        it('reports an error', function (done) {
          client.get(key, function (err, res) {
            assert(err.message.match(/The connection is already closed/))
            done()
          })
        })

        it('reports an error promisified', function () {
          return client.getAsync(key).then(assert, function (err) {
            assert(err.message.match(/The connection is already closed/))
          })
        })
      })

      describe('when connected', function () {
        var client

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

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

        describe('when the key exists in Redis', function () {
          beforeEach(function (done) {
            client.set(key, value, function (err, res) {
              helper.isNotError()(err, res)
              done()
            })
          })

          it('gets the value correctly', function (done) {
            client.get(key, function (err, res) {
              helper.isString(value)(err, res)
              done(err)
            })
          })

          it('should not throw on a get without callback (even if it\'s not useful)', function (done) {
            client.get(key)
            client.on('error', function (err) {
              throw err
            })
            setTimeout(done, 25)
          })
        })

        describe('when the key does not exist in Redis', function () {
          it('gets a null value', function (done) {
            client.get(key, function (err, res) {
              helper.isNull()(err, res)
              done(err)
            })
          })
        })
      })
    })
  })
})