update for missing link scenario

+ if the link isn't found, don't redirect it, keep it on the same page
+ it should have a status code of 404
+ it should have the form fields as well

+ added page status check

features/homepage.feature

@@ -42,5 +42,8 @@ Feature: Homepage
 
   Scenario: Accessing a nonexistent URL code
     Given I visit the "/aaaaaa" location
-    Then I should be on "/" page
+    Then I should be on "/aaaaaa" page
+    And The status code should be 404
     And I should see the message "Link aaaaaa doesn't exist"
+    And I should see a form field "url"
+    And I should see a "Submit" button

features/step_definitions/steps.rb

@@ -3,6 +3,7 @@ Before('@db-test') do
   @links = Sequel.sqlite("db/#{ENV['DB_NAME']}")[:links]
 end
 
+
 # GIVEN
 
 Given('I visit the {string} page') do |string|
@@ -17,6 +18,7 @@ Given('A link already exists with the url {string} and code {string}') do |url,
   @links.insert(url: url, code: code)
 end
 
+
 # WHEN
 
 When('I click the {string} button') do |string|
@@ -31,6 +33,7 @@ When('I visit the {string} location') do |string|
   visit string
 end
 
+
 # THEN
 
 Then('I should see text {string}') do |string|
@@ -58,6 +61,12 @@ Then('I should be redirected to {string}') do |string|
   location = actual.index(string)
   location.should equal(0)
 end
+
+Then('The status code should be {int}') do |code|
+  puts page.status_code.should eq(code)
+end
+
+
 # AFTER
 
 After('@db-test') do