old_contents: var assert          = require('assert')
  var Fetch         = require('../lib/fetch-rails')
  var encodeParams = Fetch.encodeParams
  
  describe('helpers', function () {
    describe('#encodeParams(params)', function () {
      // $.param( { page: 2 } )
      it('encode object with one key', function () {
        var result = encodeParams({page:2})
        assert.equal("page=2", result)
      })
      // $.param( { page: 2, favourites: true } )
      it('encode object with two keys', function () {
        var result = encodeParams({page:2, favourites:true})
        assert.equal("page=2&favourites=true", result)
      })
      // $.param( { q: { name: "Jhon", age: 20 } } )
      it('encode json object with deep object', function () {
        var result = encodeParams({ q: {name: "Jhon", age:20 } })
        assert.equal("q%5Bname%5D=Jhon&q%5Bage%5D=20", result)
      })
      // $.param({ ids: [1, 2, 3] })
      it('encode array in uri params', function () {
        var result = encodeParams({ids: [1,2,3]})
        assert.equal("ids%5B%5D=1&ids%5B%5D=2&ids%5B%5D=3", result)
      })
      //$.param( { users: [ { name: "Jhon", age: 20 }, { name: "Jhon2", age: 25 } ] } )
      it('encode array of objects in uri params', function () {
        var result = encodeParams( { users: [ { name: "Jhon", age: 20 }, { name: "Jhon2", age: 25 } ] } )
        assert.equal("users%5B0%5D%5Bname%5D=Jhon&users%5B0%5D%5Bage%5D=20&users%5B1%5D%5Bname%5D=Jhon2&users%5B1%5D%5Bage%5D=25", result)
      })
    })
  })
new_contents: var assert        = require('assert')
  var Fetch         = require('../lib/fetch-rails').default
  var encodeParams  = require('../lib/fetch-rails').encodeParams
  
  describe('helpers', function () {
    describe('#encodeParams(params)', function () {
      // $.param( { page: 2 } )
      it('encode object with one key', function () {
        var result = encodeParams({page:2})
        assert.equal("page=2", result)
      })
      // $.param( { page: 2, favourites: true } )
      it('encode object with two keys', function () {
        var result = encodeParams({page:2, favourites:true})
        assert.equal("page=2&favourites=true", result)
      })
      // $.param( { q: { name: "Jhon", age: 20 } } )
      it('encode json object with deep object', function () {
        var result = encodeParams({ q: {name: "Jhon", age:20 } })
        assert.equal("q%5Bname%5D=Jhon&q%5Bage%5D=20", result)
      })
      // $.param({ ids: [1, 2, 3] })
      it('encode array in uri params', function () {
        var result = encodeParams({ids: [1,2,3]})
        assert.equal("ids%5B%5D=1&ids%5B%5D=2&ids%5B%5D=3", result)
      })
      //$.param( { users: [ { name: "Jhon", age: 20 }, { name: "Jhon2", age: 25 } ] } )
      it('encode array of objects in uri params', function () {
        var result = encodeParams( { users: [ { name: "Jhon", age: 20 }, { name: "Jhon2", age: 25 } ] } )
        assert.equal("users%5B0%5D%5Bname%5D=Jhon&users%5B0%5D%5Bage%5D=20&users%5B1%5D%5Bname%5D=Jhon2&users%5B1%5D%5Bage%5D=25", result)
      })
    })
  })
  
subject: refactor test