Make a basic user model

Gemfile

 source 'https://rubygems.org'
 
 gem 'rails',                '4.2.0.beta4'
+gem 'bcrypt',		    '3.1.7'
 gem 'bootstrap-sass',       '3.2.0.0'
 #gem 'bootstrap-sass', github: 'thomas-mcdonald/bootstrap-sass'
 gem 'sass-rails',           '5.0.0.beta1'
@@ -24,6 +25,7 @@ group :test do
   gem 'minitest-reporters', '1.0.5'
   gem 'mini_backtrace',     '0.1.3'
   gem 'guard-minitest',     '2.3.1'
+  gem 'shoulda'
 end
 
 group :production do

Gemfile.lock

@@ -38,6 +38,7 @@ GEM
       tzinfo (~> 1.1)
     ansi (1.4.3)
     arel (6.0.0.beta2)
+    bcrypt (3.1.7)
     binding_of_caller (0.7.3.pre1)
       debug_inspector (>= 0.0.1)
     bootstrap-sass (3.2.0.0)
@@ -164,6 +165,12 @@ GEM
     sdoc (0.4.0)
       json (~> 1.8)
       rdoc (~> 4.0, < 5.0)
+    shoulda (3.5.0)
+      shoulda-context (~> 1.0, >= 1.0.1)
+      shoulda-matchers (>= 1.4.1, < 3.0)
+    shoulda-context (1.2.1)
+    shoulda-matchers (2.7.0)
+      activesupport (>= 3.0.0)
     slop (3.6.0)
     spring (1.1.3)
     sprockets (2.12.3)
@@ -198,6 +205,7 @@ PLATFORMS
   ruby
 
 DEPENDENCIES
+  bcrypt (= 3.1.7)
   bootstrap-sass (= 3.2.0.0)
   byebug (= 3.4.0)
   coffee-rails (= 4.0.1)
@@ -213,6 +221,7 @@ DEPENDENCIES
   rails_12factor (= 0.0.2)
   sass-rails (= 5.0.0.beta1)
   sdoc (= 0.4.0)
+  shoulda
   spring (= 1.1.3)
   sqlite3 (= 1.3.9)
   turbolinks (= 2.3.0)

app/models/user.rb

+class User < ActiveRecord::Base
+	before_save {self.email = email.downcase}
+	validates :name, presence: true, length: {maximum: 50}
+
+	VALID_EMAIL_REGEX = /\A[\w+\-.]+@[a-z\d\-.]+\.[a-z]+\z/i
+
+	validates :email, presence: true, length: {maximum: 255}, format: {with: VALID_EMAIL_REGEX}, uniqueness: {case_sensitive: false}
+
+	validates :password, length: {minimum: 6}
+
+	has_secure_password
+end

db/migrate/20141104075619_create_users.rb

+class CreateUsers < ActiveRecord::Migration
+  def change
+    create_table :users do |t|
+      t.string :name
+      t.string :email
+
+      t.timestamps null: false
+    end
+  end
+end

db/migrate/20141104094646_add_index_to_users_email.rb

+class AddIndexToUsersEmail < ActiveRecord::Migration
+  def change
+    add_index :users, :email, unique: true
+  end
+end

db/migrate/20141104095950_add_password_digest_to_users.rb

+class AddPasswordDigestToUsers < ActiveRecord::Migration
+  def change
+    add_column :users, :password_digest, :string
+  end
+end

db/schema.rb

+# 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: 20141104095950) do
+
+  create_table "users", force: true do |t|
+    t.string   "name"
+    t.string   "email"
+    t.datetime "created_at",      null: false
+    t.datetime "updated_at",      null: false
+    t.string   "password_digest"
+  end
+
+  add_index "users", ["email"], name: "index_users_on_email", unique: true
+
+end

test/models/user_test.rb

+require 'test_helper'
+
+class UserTest < ActiveSupport::TestCase
+	def setup
+		@user = User.new(name: "Example User", email: "user@example.com", password: "foobar", password_confirmation: "foobar")
+	end
+   test "should be valid" do
+     assert @user.valid?
+   end
+
+   test "name should be present" do
+   		@user.name = ""
+   		assert_not @user.valid?
+   end
+
+   should validate_presence_of(:name)
+
+   test "email should be present" do
+   		@user.email = "    "
+   		assert_not @user.valid?
+   end
+
+   test "name should not be too long" do
+   	@user.name = "a" * 51
+   	assert_not @user.valid?
+   end
+
+   test "email should not be too long" do
+   	@user.email = "a" * 256
+   	assert_not @user.valid?
+   end
+
+   test "email validation should accept valid addresses" do
+   	valid_addresses = %w[user@example,com user_at_foo.org user.name@example. foo@bar_baz.com foo@bar+baz.com]
+   	valid_addresses.each do |valid_address|
+   		@user.email = valid_address
+   		assert_not @user.valid?, "#{valid_address.inspect} should be valid"
+   	end
+   end
+
+   test "email addresses should be unique" do
+   	duplicate_user = @user.dup
+   	duplicate_user.email = @user.email.upcase
+   	@user.save
+   	assert_not duplicate_user.valid?
+   end
+
+   test "password should have a minimum length" do
+   	@user.password = @user.password_confirmation = "a" * 5
+   	assert_not @user.valid?
+   end
+end