add user scaffold

spec/factories/users.rb

@@ -0,0 +1,5 @@
+FactoryBot.define do
+  factory :user do
+    username { "xpto" }
+  end
+end

spec/models/user_spec.rb

@@ -0,0 +1,36 @@
+require 'rails_helper'
+
+RSpec.describe User, type: :model do
+  describe 'validations' do
+    describe 'username' do
+      it 'presence' do
+        user = build(:user, username: nil)
+
+        expect(user).to_not be_valid
+      end
+
+      it 'uniqueness' do
+        create(:user, username: 'xpto')
+        user = build(:user, username: 'xpto')
+
+        expect(user).to_not be_valid
+      end
+
+      it 'max length 14' do
+        with_15_caracters = build(:user, username: 'asdfghjklzxcvhn')
+        with_14_caracters = build(:user, username: 'asdfghjklzxcvh')
+
+        expect(with_15_caracters).to_not be_valid
+        expect(with_14_caracters).to be_valid
+      end
+
+      it 'format' do
+        with_invalid_format = build(:user, username: 'asdfghjklzxcvh!')
+        with_valid_format = build(:user, username: 'asdfghjklzxcvh')
+
+        expect(with_invalid_format).to_not be_valid
+        expect(with_valid_format).to be_valid
+      end
+    end
+  end
+end

spec/rails_helper.rb

@@ -34,6 +34,8 @@ RSpec.configure do |config|
   # Remove this line if you're not using ActiveRecord or ActiveRecord fixtures
   config.fixture_path = "#{::Rails.root}/spec/fixtures"
 
+  config.include FactoryBot::Syntax::Methods
+
   # If you're not using ActiveRecord, or you'd prefer not to run each of your
   # examples within a transaction, remove the following line or assign false
   # instead of true.
@@ -62,10 +64,3 @@ RSpec.configure do |config|
   # arbitrary gems may also be filtered via:
   # config.filter_gems_from_backtrace("gem name")
 end
-
-Shoulda::Matchers.configure do |config|
-  config.integrate do |with|
-    with.test_framework :rspec
-    with.library :rails
-  end
-end

spec/requests/users_spec.rb

@@ -0,0 +1,17 @@
+require 'rails_helper'
+
+RSpec.describe "/users", type: :request do
+  let(:valid_attributes) {
+    {
+      username: 'geonizeli'
+    }
+  }
+
+  describe "GET /show" do
+    it "renders a successful response" do
+      user = User.create! valid_attributes
+      get user_url(user), as: :json
+      expect(response).to be_successful
+    end
+  end
+end

spec/routing/users_routing_spec.rb

@@ -0,0 +1,9 @@
+require "rails_helper"
+
+RSpec.describe UsersController, type: :routing do
+  describe "routing" do
+    it "routes to #show" do
+      expect(get: "/users/1").to route_to("users#show", id: "1")
+    end
+  end
+end