user_spec.rb

# rspec/requests/user_spec.rb

require 'rails_helper'

RSpec.describe Api::V1::UsersController, type: :request do

  describe "GET /users" do
    before :each do
      FactoryGirl.create_list(:users, 1)
      get "/api/v1/users"
    end

    it { have_http_status(200) }
    it 'show all users' do
      json = JSON.parse(response.body)
      expect(json.length).to eq(User.count)
    end
  end
  
end