update for features

+ added flash/message assertions
+ adjusted urls to be http://google.com for tests for now
+ added @db-test tags to tests that use db interactions
+ added a scenario for duplicate URLs being used
+ added before and after steps to init and clean up db tests
+ added initialization of a test db for tests instead of interacting
  with the production database

features/homepage.feature

@@ -7,6 +7,7 @@ Feature: Homepage
   Scenario: Homepage Loads with a form
     Given I visit the "/" page
     Then I should see text "URL Shortener"
+    And I should see the message "Enter a URL"
     And I should see a form field "url"
     And I should see a "Submit" button
 
@@ -14,9 +15,21 @@ Feature: Homepage
     Given I visit the "/" page
     When I click the "Submit" button
     Then I should be on "/" page
+    And I should see the message "Please enter a valid URL"
 
+  @db-test
   Scenario: Submitting the form with a correct URL
     Given I visit the "/" page
-    When I type "http://google.com/" in the "url" field
+    When I type "http://google.com" in the "url" field
     And I click the "Submit" button
     Then I should be on "/create" page
+    And I should see the message "Link created"
+
+  @db-test
+  Scenario: Submitting the form with an existing URL
+    Given I visit the "/" page
+    And A link already exists with the url "http://google.com"
+    When I type "http://google.com" in the "url" field
+    And I click the "Submit" button
+    Then I should be on "/create" page
+    And I should see the message "Link exists"

features/step_definitions/steps.rb

@@ -1,9 +1,18 @@
+# BEFORE
+Before('@db-test') do
+  @links = Sequel.sqlite("db/#{ENV['DB_NAME']}")[:links]
+end
+
 # GIVEN
 
 Given('I visit the {string} page') do |string|
   visit string
 end
 
+Given('A link already exists with the url {string}') do |string|
+  @links.insert(url: string, code: "aaaaaa")
+end
+
 # WHEN
 
 When('I click the {string} button') do |string|
@@ -31,3 +40,13 @@ end
 Then('I should be on {string} page') do |string|
   page.should have_current_path string
 end
+
+Then('I should see the message {string}') do |message|
+  page.should have_selector '#message', text: message
+end
+
+# AFTER
+
+After('@db-test') do
+  @links.delete
+end

features/support/env.rb

@@ -1,11 +1,27 @@
+require_relative '../../.env'
+ENV["DB_NAME"] = "test_#{ENV["DB_NAME"]}"
 require_relative '../../app'
 require 'rubygems'
 require 'roda'
+require 'sequel'
 require 'capybara'
 require 'capybara/dsl'
 require 'rspec'
 
+# DB initialization
+Sequel.extension :migration
+Sequel.sqlite("db/#{ENV['DB_NAME']}") do |db|
+  Sequel::Migrator.apply(db, "db/migrations")
+end
 
+# RSpec db setup
+RSpec.configure do |c|
+  c.around(:each) do |example|
+    DB.transaction(rollback: :always, auto_savepoint: true){example.run}
+  end
+end
+
+# attach app to Capybara
 Capybara.app = App
 
 include Capybara::DSL