From 8344498740ed253717af61140187eb18f729dde9 Mon Sep 17 00:00:00 2001
From: Andrew Tomaka <atomaka@gmail.com>
Date: Wed, 8 Jul 2015 15:17:37 -0400
Subject: [PATCH] Add user creation

---
 .gitignore                                   |   3 +
 Gemfile                                      |   3 +
 Gemfile.lock                                 |   6 +
 app/assets/javascripts/users.coffee          |   3 +
 app/assets/stylesheets/users.scss            |   3 +
 app/controllers/users_controller.rb          |  21 +++
 app/helpers/users_helper.rb                  |   2 +
 app/models/user.rb                           |  15 ++
 app/views/users/create.html.slim             |   0
 app/views/users/new.html.slim                |   7 +
 config/initializers/simple_form.rb           | 166 +++++++++++++++++++
 config/initializers/simple_form_bootstrap.rb | 136 +++++++++++++++
 config/locales/simple_form.en.yml            |  31 ++++
 config/routes.rb                             |  55 +-----
 db/migrate/20150708191201_create_users.rb    |  11 ++
 db/schema.rb                                 |  24 +++
 lib/templates/slim/scaffold/_form.html.slim  |  10 ++
 spec/controllers/users_controller_spec.rb    |  49 ++++++
 spec/factories/user_factory.rb               |   8 +
 spec/models/user_spec.rb                     |  48 ++++++
 20 files changed, 547 insertions(+), 54 deletions(-)
 create mode 100644 app/assets/javascripts/users.coffee
 create mode 100644 app/assets/stylesheets/users.scss
 create mode 100644 app/controllers/users_controller.rb
 create mode 100644 app/helpers/users_helper.rb
 create mode 100644 app/models/user.rb
 create mode 100644 app/views/users/create.html.slim
 create mode 100644 app/views/users/new.html.slim
 create mode 100644 config/initializers/simple_form.rb
 create mode 100644 config/initializers/simple_form_bootstrap.rb
 create mode 100644 config/locales/simple_form.en.yml
 create mode 100644 db/migrate/20150708191201_create_users.rb
 create mode 100644 db/schema.rb
 create mode 100644 lib/templates/slim/scaffold/_form.html.slim
 create mode 100644 spec/controllers/users_controller_spec.rb
 create mode 100644 spec/factories/user_factory.rb
 create mode 100644 spec/models/user_spec.rb

diff --git a/.gitignore b/.gitignore
index 050c9d9..d0e345b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -15,3 +15,6 @@
 /log/*
 !/log/.keep
 /tmp
+
+# Me
+coverage/
diff --git a/Gemfile b/Gemfile
index 4102717..afe0b38 100644
--- a/Gemfile
+++ b/Gemfile
@@ -18,6 +18,9 @@ gem 'jquery-rails'
 gem 'jbuilder', '~> 2.0'
 gem 'slim-rails'
 gem 'bootstrap-sass'
+gem 'simple_form'
+
+gem 'bcrypt'
 
 gem 'sdoc', '~> 0.4.0', group: :doc
 
diff --git a/Gemfile.lock b/Gemfile.lock
index b419a9b..b1e8b5b 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -41,6 +41,7 @@ GEM
     autoprefixer-rails (5.2.1)
       execjs
       json
+    bcrypt (3.1.10)
     better_errors (2.1.1)
       coderay (>= 1.0.0)
       erubis (>= 2.6.6)
@@ -208,6 +209,9 @@ GEM
     shoulda-context (1.2.1)
     shoulda-matchers (2.8.0)
       activesupport (>= 3.0.0)
+    simple_form (3.1.0)
+      actionpack (~> 4.0)
+      activemodel (~> 4.0)
     slim (3.0.6)
       temple (~> 0.7.3)
       tilt (>= 1.3.3, < 2.1)
@@ -245,6 +249,7 @@ PLATFORMS
   ruby
 
 DEPENDENCIES
+  bcrypt
   better_errors
   bootstrap-sass
   bullet
@@ -266,6 +271,7 @@ DEPENDENCIES
   sass-rails (~> 5.0)
   sdoc (~> 0.4.0)
   shoulda
+  simple_form
   slim-rails
   spring
   spring-commands-rspec
diff --git a/app/assets/javascripts/users.coffee b/app/assets/javascripts/users.coffee
new file mode 100644
index 0000000..24f83d1
--- /dev/null
+++ b/app/assets/javascripts/users.coffee
@@ -0,0 +1,3 @@
+# Place all the behaviors and hooks related to the matching controller here.
+# All this logic will automatically be available in application.js.
+# You can use CoffeeScript in this file: http://coffeescript.org/
diff --git a/app/assets/stylesheets/users.scss b/app/assets/stylesheets/users.scss
new file mode 100644
index 0000000..31a2eac
--- /dev/null
+++ b/app/assets/stylesheets/users.scss
@@ -0,0 +1,3 @@
+// Place all the styles related to the Users controller here.
+// They will automatically be included in application.css.
+// You can use Sass (SCSS) here: http://sass-lang.com/
diff --git a/app/controllers/users_controller.rb b/app/controllers/users_controller.rb
new file mode 100644
index 0000000..f072718
--- /dev/null
+++ b/app/controllers/users_controller.rb
@@ -0,0 +1,21 @@
+class UsersController < ApplicationController
+  def new
+    @user = User.new
+  end
+
+  def create
+    @user = User.new(user_params)
+
+    if @user.save
+      render :create
+    else
+      render :new
+    end
+  end
+
+  private
+
+  def user_params
+    params.require(:user).permit(:username, :password, :email)
+  end
+end
diff --git a/app/helpers/users_helper.rb b/app/helpers/users_helper.rb
new file mode 100644
index 0000000..2310a24
--- /dev/null
+++ b/app/helpers/users_helper.rb
@@ -0,0 +1,2 @@
+module UsersHelper
+end
diff --git a/app/models/user.rb b/app/models/user.rb
new file mode 100644
index 0000000..ab848a4
--- /dev/null
+++ b/app/models/user.rb
@@ -0,0 +1,15 @@
+class User < ActiveRecord::Base
+  has_secure_password
+
+  before_save :downcase_email
+
+  validates :email, presence: true, uniqueness: true
+  validates :username, presence: true, uniqueness: true
+  validates :password, length: { minimum: 8 }
+
+  private
+
+  def downcase_email
+    self.email = self.email.downcase
+  end
+end
diff --git a/app/views/users/create.html.slim b/app/views/users/create.html.slim
new file mode 100644
index 0000000..e69de29
diff --git a/app/views/users/new.html.slim b/app/views/users/new.html.slim
new file mode 100644
index 0000000..c263cc7
--- /dev/null
+++ b/app/views/users/new.html.slim
@@ -0,0 +1,7 @@
+= simple_form_for @user do |f|
+  .form-inputs
+    = f.input :username
+    = f.input :password
+    = f.input :email
+  .form-actions
+    = f.button :submit
diff --git a/config/initializers/simple_form.rb b/config/initializers/simple_form.rb
new file mode 100644
index 0000000..d5492e5
--- /dev/null
+++ b/config/initializers/simple_form.rb
@@ -0,0 +1,166 @@
+# Use this setup block to configure all options available in SimpleForm.
+SimpleForm.setup do |config|
+  # Wrappers are used by the form builder to generate a
+  # complete input. You can remove any component from the
+  # wrapper, change the order or even add your own to the
+  # stack. The options given below are used to wrap the
+  # whole input.
+  config.wrappers :default, class: :input,
+    hint_class: :field_with_hint, error_class: :field_with_errors do |b|
+    ## Extensions enabled by default
+    # Any of these extensions can be disabled for a
+    # given input by passing: `f.input EXTENSION_NAME => false`.
+    # You can make any of these extensions optional by
+    # renaming `b.use` to `b.optional`.
+
+    # Determines whether to use HTML5 (:email, :url, ...)
+    # and required attributes
+    b.use :html5
+
+    # Calculates placeholders automatically from I18n
+    # You can also pass a string as f.input placeholder: "Placeholder"
+    b.use :placeholder
+
+    ## Optional extensions
+    # They are disabled unless you pass `f.input EXTENSION_NAME => true`
+    # to the input. If so, they will retrieve the values from the model
+    # if any exists. If you want to enable any of those
+    # extensions by default, you can change `b.optional` to `b.use`.
+
+    # Calculates maxlength from length validations for string inputs
+    b.optional :maxlength
+
+    # Calculates pattern from format validations for string inputs
+    b.optional :pattern
+
+    # Calculates min and max from length validations for numeric inputs
+    b.optional :min_max
+
+    # Calculates readonly automatically from readonly attributes
+    b.optional :readonly
+
+    ## Inputs
+    b.use :label_input
+    b.use :hint,  wrap_with: { tag: :span, class: :hint }
+    b.use :error, wrap_with: { tag: :span, class: :error }
+
+    ## full_messages_for
+    # If you want to display the full error message for the attribute, you can
+    # use the component :full_error, like:
+    #
+    # b.use :full_error, wrap_with: { tag: :span, class: :error }
+  end
+
+  # The default wrapper to be used by the FormBuilder.
+  config.default_wrapper = :default
+
+  # Define the way to render check boxes / radio buttons with labels.
+  # Defaults to :nested for bootstrap config.
+  #   inline: input + label
+  #   nested: label > input
+  config.boolean_style = :nested
+
+  # Default class for buttons
+  config.button_class = 'btn'
+
+  # Method used to tidy up errors. Specify any Rails Array method.
+  # :first lists the first message for each field.
+  # Use :to_sentence to list all errors for each field.
+  # config.error_method = :first
+
+  # Default tag used for error notification helper.
+  config.error_notification_tag = :div
+
+  # CSS class to add for error notification helper.
+  config.error_notification_class = 'error_notification'
+
+  # ID to add for error notification helper.
+  # config.error_notification_id = nil
+
+  # Series of attempts to detect a default label method for collection.
+  # config.collection_label_methods = [ :to_label, :name, :title, :to_s ]
+
+  # Series of attempts to detect a default value method for collection.
+  # config.collection_value_methods = [ :id, :to_s ]
+
+  # You can wrap a collection of radio/check boxes in a pre-defined tag, defaulting to none.
+  # config.collection_wrapper_tag = nil
+
+  # You can define the class to use on all collection wrappers. Defaulting to none.
+  # config.collection_wrapper_class = nil
+
+  # You can wrap each item in a collection of radio/check boxes with a tag,
+  # defaulting to :span. Please note that when using :boolean_style = :nested,
+  # SimpleForm will force this option to be a label.
+  # config.item_wrapper_tag = :span
+
+  # You can define a class to use in all item wrappers. Defaulting to none.
+  # config.item_wrapper_class = nil
+
+  # How the label text should be generated altogether with the required text.
+  # config.label_text = lambda { |label, required, explicit_label| "#{required} #{label}" }
+
+  # You can define the class to use on all labels. Default is nil.
+  # config.label_class = nil
+
+  # You can define the default class to be used on forms. Can be overriden
+  # with `html: { :class }`. Defaulting to none.
+  # config.default_form_class = nil
+
+  # You can define which elements should obtain additional classes
+  # config.generate_additional_classes_for = [:wrapper, :label, :input]
+
+  # Whether attributes are required by default (or not). Default is true.
+  # config.required_by_default = true
+
+  # Tell browsers whether to use the native HTML5 validations (novalidate form option).
+  # These validations are enabled in SimpleForm's internal config but disabled by default
+  # in this configuration, which is recommended due to some quirks from different browsers.
+  # To stop SimpleForm from generating the novalidate option, enabling the HTML5 validations,
+  # change this configuration to true.
+  config.browser_validations = false
+
+  # Collection of methods to detect if a file type was given.
+  # config.file_methods = [ :mounted_as, :file?, :public_filename ]
+
+  # Custom mappings for input types. This should be a hash containing a regexp
+  # to match as key, and the input type that will be used when the field name
+  # matches the regexp as value.
+  # config.input_mappings = { /count/ => :integer }
+
+  # Custom wrappers for input types. This should be a hash containing an input
+  # type as key and the wrapper that will be used for all inputs with specified type.
+  # config.wrapper_mappings = { string: :prepend }
+
+  # Namespaces where SimpleForm should look for custom input classes that
+  # override default inputs.
+  # config.custom_inputs_namespaces << "CustomInputs"
+
+  # Default priority for time_zone inputs.
+  # config.time_zone_priority = nil
+
+  # Default priority for country inputs.
+  # config.country_priority = nil
+
+  # When false, do not use translations for labels.
+  # config.translate_labels = true
+
+  # Automatically discover new inputs in Rails' autoload path.
+  # config.inputs_discovery = true
+
+  # Cache SimpleForm inputs discovery
+  # config.cache_discovery = !Rails.env.development?
+
+  # Default class for inputs
+  # config.input_class = nil
+
+  # Define the default class of the input wrapper of the boolean input.
+  config.boolean_label_class = 'checkbox'
+
+  # Defines if the default input wrapper class should be included in radio
+  # collection wrappers.
+  # config.include_default_input_wrapper_class = true
+
+  # Defines which i18n scope will be used in Simple Form.
+  # config.i18n_scope = 'simple_form'
+end
diff --git a/config/initializers/simple_form_bootstrap.rb b/config/initializers/simple_form_bootstrap.rb
new file mode 100644
index 0000000..ea4a63d
--- /dev/null
+++ b/config/initializers/simple_form_bootstrap.rb
@@ -0,0 +1,136 @@
+# Use this setup block to configure all options available in SimpleForm.
+SimpleForm.setup do |config|
+  config.error_notification_class = 'alert alert-danger'
+  config.button_class = 'btn btn-default'
+  config.boolean_label_class = nil
+
+  config.wrappers :vertical_form, tag: 'div', class: 'form-group', error_class: 'has-error' do |b|
+    b.use :html5
+    b.use :placeholder
+    b.optional :maxlength
+    b.optional :pattern
+    b.optional :min_max
+    b.optional :readonly
+    b.use :label, class: 'control-label'
+
+    b.use :input, class: 'form-control'
+    b.use :error, wrap_with: { tag: 'span', class: 'help-block' }
+    b.use :hint,  wrap_with: { tag: 'p', class: 'help-block' }
+  end
+
+  config.wrappers :vertical_file_input, tag: 'div', class: 'form-group', error_class: 'has-error' do |b|
+    b.use :html5
+    b.use :placeholder
+    b.optional :maxlength
+    b.optional :readonly
+    b.use :label, class: 'control-label'
+
+    b.use :input
+    b.use :error, wrap_with: { tag: 'span', class: 'help-block' }
+    b.use :hint,  wrap_with: { tag: 'p', class: 'help-block' }
+  end
+
+  config.wrappers :vertical_boolean, tag: 'div', class: 'form-group', error_class: 'has-error' do |b|
+    b.use :html5
+    b.optional :readonly
+
+    b.wrapper tag: 'div', class: 'checkbox' do |ba|
+      ba.use :label_input
+    end
+
+    b.use :error, wrap_with: { tag: 'span', class: 'help-block' }
+    b.use :hint,  wrap_with: { tag: 'p', class: 'help-block' }
+  end
+
+  config.wrappers :vertical_radio_and_checkboxes, tag: 'div', class: 'form-group', error_class: 'has-error' do |b|
+    b.use :html5
+    b.optional :readonly
+    b.use :label, class: 'control-label'
+    b.use :input
+    b.use :error, wrap_with: { tag: 'span', class: 'help-block' }
+    b.use :hint,  wrap_with: { tag: 'p', class: 'help-block' }
+  end
+
+  config.wrappers :horizontal_form, tag: 'div', class: 'form-group', error_class: 'has-error' do |b|
+    b.use :html5
+    b.use :placeholder
+    b.optional :maxlength
+    b.optional :pattern
+    b.optional :min_max
+    b.optional :readonly
+    b.use :label, class: 'col-sm-3 control-label'
+
+    b.wrapper tag: 'div', class: 'col-sm-9' do |ba|
+      ba.use :input, class: 'form-control'
+      ba.use :error, wrap_with: { tag: 'span', class: 'help-block' }
+      ba.use :hint,  wrap_with: { tag: 'p', class: 'help-block' }
+    end
+  end
+
+  config.wrappers :horizontal_file_input, tag: 'div', class: 'form-group', error_class: 'has-error' do |b|
+    b.use :html5
+    b.use :placeholder
+    b.optional :maxlength
+    b.optional :readonly
+    b.use :label, class: 'col-sm-3 control-label'
+
+    b.wrapper tag: 'div', class: 'col-sm-9' do |ba|
+      ba.use :input
+      ba.use :error, wrap_with: { tag: 'span', class: 'help-block' }
+      ba.use :hint,  wrap_with: { tag: 'p', class: 'help-block' }
+    end
+  end
+
+  config.wrappers :horizontal_boolean, tag: 'div', class: 'form-group', error_class: 'has-error' do |b|
+    b.use :html5
+    b.optional :readonly
+
+    b.wrapper tag: 'div', class: 'col-sm-offset-3 col-sm-9' do |wr|
+      wr.wrapper tag: 'div', class: 'checkbox' do |ba|
+        ba.use :label_input, class: 'col-sm-9'
+      end
+
+      wr.use :error, wrap_with: { tag: 'span', class: 'help-block' }
+      wr.use :hint,  wrap_with: { tag: 'p', class: 'help-block' }
+    end
+  end
+
+  config.wrappers :horizontal_radio_and_checkboxes, tag: 'div', class: 'form-group', error_class: 'has-error' do |b|
+    b.use :html5
+    b.optional :readonly
+
+    b.use :label, class: 'col-sm-3 control-label'
+
+    b.wrapper tag: 'div', class: 'col-sm-9' do |ba|
+      ba.use :input
+      ba.use :error, wrap_with: { tag: 'span', class: 'help-block' }
+      ba.use :hint,  wrap_with: { tag: 'p', class: 'help-block' }
+    end
+  end
+
+  config.wrappers :inline_form, tag: 'div', class: 'form-group', error_class: 'has-error' do |b|
+    b.use :html5
+    b.use :placeholder
+    b.optional :maxlength
+    b.optional :pattern
+    b.optional :min_max
+    b.optional :readonly
+    b.use :label, class: 'sr-only'
+
+    b.use :input, class: 'form-control'
+    b.use :error, wrap_with: { tag: 'span', class: 'help-block' }
+    b.use :hint,  wrap_with: { tag: 'p', class: 'help-block' }
+  end
+
+  # Wrappers for forms and inputs using the Bootstrap toolkit.
+  # Check the Bootstrap docs (http://getbootstrap.com)
+  # to learn about the different styles for forms and inputs,
+  # buttons and other elements.
+  config.default_wrapper = :vertical_form
+  config.wrapper_mappings = {
+    check_boxes: :vertical_radio_and_checkboxes,
+    radio_buttons: :vertical_radio_and_checkboxes,
+    file: :vertical_file_input,
+    boolean: :vertical_boolean,
+  }
+end
diff --git a/config/locales/simple_form.en.yml b/config/locales/simple_form.en.yml
new file mode 100644
index 0000000..2374383
--- /dev/null
+++ b/config/locales/simple_form.en.yml
@@ -0,0 +1,31 @@
+en:
+  simple_form:
+    "yes": 'Yes'
+    "no": 'No'
+    required:
+      text: 'required'
+      mark: '*'
+      # You can uncomment the line below if you need to overwrite the whole required html.
+      # When using html, text and mark won't be used.
+      # html: '<abbr title="required">*</abbr>'
+    error_notification:
+      default_message: "Please review the problems below:"
+    # Examples
+    # labels:
+    #   defaults:
+    #     password: 'Password'
+    #   user:
+    #     new:
+    #       email: 'E-mail to sign in.'
+    #     edit:
+    #       email: 'E-mail.'
+    # hints:
+    #   defaults:
+    #     username: 'User name to sign in.'
+    #     password: 'No special characters, please.'
+    # include_blanks:
+    #   defaults:
+    #     age: 'Rather not say'
+    # prompts:
+    #   defaults:
+    #     age: 'Select your age'
diff --git a/config/routes.rb b/config/routes.rb
index 3f66539..feb0a5b 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -1,56 +1,3 @@
 Rails.application.routes.draw do
-  # The priority is based upon order of creation: first created -> highest priority.
-  # See how all your routes lay out with "rake routes".
-
-  # You can have the root of your site routed with "root"
-  # root 'welcome#index'
-
-  # Example of regular route:
-  #   get 'products/:id' => 'catalog#view'
-
-  # Example of named route that can be invoked with purchase_url(id: product.id)
-  #   get 'products/:id/purchase' => 'catalog#purchase', as: :purchase
-
-  # Example resource route (maps HTTP verbs to controller actions automatically):
-  #   resources :products
-
-  # Example resource route with options:
-  #   resources :products do
-  #     member do
-  #       get 'short'
-  #       post 'toggle'
-  #     end
-  #
-  #     collection do
-  #       get 'sold'
-  #     end
-  #   end
-
-  # Example resource route with sub-resources:
-  #   resources :products do
-  #     resources :comments, :sales
-  #     resource :seller
-  #   end
-
-  # Example resource route with more complex sub-resources:
-  #   resources :products do
-  #     resources :comments
-  #     resources :sales do
-  #       get 'recent', on: :collection
-  #     end
-  #   end
-
-  # Example resource route with concerns:
-  #   concern :toggleable do
-  #     post 'toggle'
-  #   end
-  #   resources :posts, concerns: :toggleable
-  #   resources :photos, concerns: :toggleable
-
-  # Example resource route within a namespace:
-  #   namespace :admin do
-  #     # Directs /admin/products/* to Admin::ProductsController
-  #     # (app/controllers/admin/products_controller.rb)
-  #     resources :products
-  #   end
+  resources :users, only: [:new, :create]
 end
diff --git a/db/migrate/20150708191201_create_users.rb b/db/migrate/20150708191201_create_users.rb
new file mode 100644
index 0000000..b0879d4
--- /dev/null
+++ b/db/migrate/20150708191201_create_users.rb
@@ -0,0 +1,11 @@
+class CreateUsers < ActiveRecord::Migration
+  def change
+    create_table :users do |t|
+      t.string :username
+      t.string :email
+      t.string :password_digest
+
+      t.timestamps null: false
+    end
+  end
+end
diff --git a/db/schema.rb b/db/schema.rb
new file mode 100644
index 0000000..0f9d4cc
--- /dev/null
+++ b/db/schema.rb
@@ -0,0 +1,24 @@
+# encoding: UTF-8
+# This file is auto-generated from the current state of the database. Instead
+# of editing this file, please use the migrations feature of Active Record to
+# incrementally modify your database, and then regenerate this schema definition.
+#
+# Note that this schema.rb definition is the authoritative source for your
+# database schema. If you need to create the application database on another
+# system, you should be using db:schema:load, not running all the migrations
+# from scratch. The latter is a flawed and unsustainable approach (the more migrations
+# you'll amass, the slower it'll run and the greater likelihood for issues).
+#
+# It's strongly recommended that you check this file into your version control system.
+
+ActiveRecord::Schema.define(version: 20150708191201) do
+
+  create_table "users", force: :cascade do |t|
+    t.string   "username"
+    t.string   "email"
+    t.string   "password_digest"
+    t.datetime "created_at",      null: false
+    t.datetime "updated_at",      null: false
+  end
+
+end
diff --git a/lib/templates/slim/scaffold/_form.html.slim b/lib/templates/slim/scaffold/_form.html.slim
new file mode 100644
index 0000000..a2ff775
--- /dev/null
+++ b/lib/templates/slim/scaffold/_form.html.slim
@@ -0,0 +1,10 @@
+= simple_form_for(@<%= singular_table_name %>) do |f|
+  = f.error_notification
+
+  .form-inputs
+<%- attributes.each do |attribute| -%>
+    = f.<%= attribute.reference? ? :association : :input %> :<%= attribute.name %>
+<%- end -%>
+
+  .form-actions
+    = f.button :submit
diff --git a/spec/controllers/users_controller_spec.rb b/spec/controllers/users_controller_spec.rb
new file mode 100644
index 0000000..9ab55d5
--- /dev/null
+++ b/spec/controllers/users_controller_spec.rb
@@ -0,0 +1,49 @@
+require 'rails_helper'
+
+describe UsersController, type: :controller do
+  describe '#create' do
+    let(:data) do
+      {
+        username: 'username',
+        password: 'password',
+        email: 'username@domain.com'
+      }
+    end
+
+    context 'with valid data' do
+      it 'should create a user' do
+        expect { post :create, user: data }.to change(User, :count).by(1)
+      end
+
+      it 'should redirect to the login page'
+    end
+
+    context 'with invalid data' do
+      it 'should not create a user with an invalid username' do
+        data['username'] = ''
+
+        expect { post :create, user: data }.to change(User, :count).by(0)
+      end
+
+      it 'should not create a user with an invalid password' do
+        data['password'] = ''
+
+        expect { post :create, user: data }.to change(User, :count).by(0)
+      end
+
+      it 'should not create a user with an invalid email' do
+        data['email'] = ''
+
+        expect { post :create, user: data }.to change(User, :count).by(0)
+      end
+
+      it 'should render :new' do
+        data['username'] = ''
+
+        post :create, user: data
+
+        expect(response).to render_template(:new)
+      end
+    end
+  end
+end
diff --git a/spec/factories/user_factory.rb b/spec/factories/user_factory.rb
new file mode 100644
index 0000000..a10dea6
--- /dev/null
+++ b/spec/factories/user_factory.rb
@@ -0,0 +1,8 @@
+
+FactoryGirl.define do
+  factory :user do
+    username { Faker::Internet.user_name }
+    password { Faker::Internet.password(8, 50) }
+    email { Faker::Internet.email }
+  end
+end
diff --git a/spec/models/user_spec.rb b/spec/models/user_spec.rb
new file mode 100644
index 0000000..4df0c58
--- /dev/null
+++ b/spec/models/user_spec.rb
@@ -0,0 +1,48 @@
+require 'rails_helper'
+
+describe User, type: :model do
+  let(:user) { build(:user) }
+
+  it { should have_secure_password }
+
+  context 'with valid data' do
+    it 'should be valid' do
+      expect(user).to be_valid
+    end
+  end
+
+  context 'with invalid data' do
+    it 'should not allow a blank username' do
+      user.username = ''
+      expect(user).to be_invalid
+    end
+
+    it 'should not allow duplicate usernames' do
+      original = create(:user)
+      duplicate = build(:user, username: original.username)
+      expect(duplicate).to be_invalid
+    end
+
+    it 'should not allow blank emails' do
+      user.email = ''
+      expect(user).to be_invalid
+    end
+
+    it 'should downcase emails' do
+      user.email = 'UPPERCASE@BADMAIL.COM'
+      user.save
+      expect(user.email).to eq('uppercase@badmail.com')
+    end
+
+    it 'should not allow duplicate emails' do
+      original = create(:user)
+      duplicate = build(:user, email: original.email)
+      expect(duplicate).to be_invalid
+    end
+
+    it 'should not allow short passwords' do
+      user.password = 'a' * 4
+      expect(user).to be_invalid
+    end
+  end
+end