Add error on existing supplier name for current employee

app/services/new_supplier.rb

@@ -51,6 +51,6 @@ class NewSupplier
   def supplier_name_uniqueness
     return unless current_employee.present? and supplier_name.present?
     current_suppliers = current_employee.suppliers
-    errors.add :base, 'You already have a supplier with that name' if current_suppliers.map(&:name).include? supplier_name
+    errors.add :supplier_name, 'You already have a supplier with that name' if current_suppliers.map(&:name).include? supplier_name
   end
 end

spec/acceptance/suppliers/signup.feature

@@ -29,6 +29,15 @@ Feature: A supplier can sign up
     And I wait 1 second
     Then a new supplier with the existing employee should be created
     And the supplier should be redirected to the supplier '/pages/introduction' path
+
+  @javascript
+  Scenario: Existing signed in employee creates existing supplier name
+    Given there is a confirmed and open supplier
+    And I am signed in as supplier
+    When I visit the supplier signup path
+    And fill in the supplier signup form with an existing supplier name
+    And click on the supplier signup submit button
+    Then the new supplier signup for should have an error on 'supplier_name'
 #Scenarios
 #- non existing non signed in employee
 #- existing non signed in employee

spec/acceptance_steps/suppliers/signup_steps.rb

@@ -20,6 +20,10 @@ step "fill in the supplier signup form with a new supplier name" do
   js_set_field '#new_supplier_supplier_name', 'Signup Supplier'
 end
 
+step "fill in the supplier signup form with an existing supplier name" do
+  js_set_field '#new_supplier_supplier_name', @supplier.name
+end
+
 step "click on the supplier signup submit button" do
   find('[name="commit"]').click
 end
@@ -59,3 +63,7 @@ step "the new signup supplier should be confirmed" do
   @signup_supplier.reload
   @signup_supplier.should be_confirmed
 end
+
+step "the new supplier signup for should have an error on :attribute" do |attribute|
+  page.should have_selector ".#{attribute}.error"
+end