diff --git a/Gemfile b/Gemfile
index b14f471..6a278f9 100644
--- a/Gemfile
+++ b/Gemfile
@@ -7,8 +7,9 @@ unless ENV['TRAVIS']
   gem 'yard',   require: false
 end
 
-gem 'lotus-utils', github: 'lotus/utils', branch: 'master' # FIXME use a stable branch
-gem 'lotus-view',  github: 'lotus/view',  branch: '0.3.x'
+gem 'lotus-utils',       github: 'lotus/utils',      branch: 'master' # FIXME use a stable branch
+gem 'lotus-controller',  github: 'lotus/controller', branch: 'master' # FIXME use a stable branch
+gem 'lotus-view',        github: 'lotus/view',       branch: '0.3.x'
 
 gem 'simplecov', require: false
 gem 'coveralls', require: false
diff --git a/lib/lotus/helpers.rb b/lib/lotus/helpers.rb
index c5ea520..a369d65 100644
--- a/lib/lotus/helpers.rb
+++ b/lib/lotus/helpers.rb
@@ -2,6 +2,7 @@
 require 'lotus/helpers/html_helper'
 require 'lotus/helpers/escape_helper'
 require 'lotus/helpers/routing_helper'
+require 'lotus/helpers/form_helper'
 
 module Lotus
   # View helpers for Ruby applications
@@ -21,6 +22,7 @@ def self.included(base)
         include Lotus::Helpers::HtmlHelper
         include Lotus::Helpers::EscapeHelper
         include Lotus::Helpers::RoutingHelper
+        include Lotus::Helpers::FormHelper
       end
     end
   end
diff --git a/lib/lotus/helpers/form_helper.rb b/lib/lotus/helpers/form_helper.rb
new file mode 100644
index 0000000..090edd3
--- /dev/null
+++ b/lib/lotus/helpers/form_helper.rb
@@ -0,0 +1,186 @@
+require 'lotus/helpers/html_helper/html_builder'
+require 'lotus/helpers/html_helper/html_node'
+require 'lotus/utils/string'
+
+module Lotus
+  module Helpers
+    module FormHelper
+      DEFAULT_METHOD  = 'POST'.freeze
+      BROWSER_METHODS = ['GET', 'POST'].freeze
+
+      CHECKED           = 'checked'.freeze
+      SELECTED          = 'selected'.freeze
+      ACCEPT_SEPARATOR  = ','.freeze
+      # ENCTYPE_MULTIPART = 'multipart/form-data'.freeze
+
+      class HtmlNode < ::Lotus::Helpers::HtmlHelper::HtmlNode
+        def initialize(name, content, attributes, options)
+          super
+          @builder = FormBuilder.new(options.fetch(:form_name), options.fetch(:params))
+          @verb    = options.fetch(:verb, nil)
+        end
+
+        private
+        def content
+          _method_override!
+          super
+        end
+
+        def _method_override!
+          return if @verb.nil?
+
+          verb = @verb
+          @builder.resolve do
+            input(type: :hidden, name: :_method, value: verb)
+          end
+        end
+      end
+
+      class FormBuilder < ::Lotus::Helpers::HtmlHelper::HtmlBuilder
+        self.html_node = ::Lotus::Helpers::FormHelper::HtmlNode
+
+        def initialize(name, params, attributes = {}, &blk)
+          super()
+
+          @name       = name
+          @params     = params
+          @attributes = attributes
+          @blk        = blk
+        end
+
+        def options
+          Hash[form_name: @name, params: @params, verb: @verb]
+        end
+
+        def to_s
+          if toplevel?
+            _method_override!
+            form(@blk, @attributes)
+          end
+
+          super
+        end
+
+        def fields_for(name)
+          current_name = @name
+          @name        = _input_name(name)
+          yield
+        ensure
+          @name = current_name
+        end
+
+        def label(content, attributes = {}, &blk)
+          attributes = { for: _for(content, attributes.delete(:for)) }.merge(attributes)
+          content    = Utils::String.new(content).titleize
+
+          super(content, attributes, &blk)
+        end
+
+        def color_field(name, attributes = {})
+          input _attributes(:color, name, attributes)
+        end
+
+        def date_field(name, attributes = {})
+          input _attributes(:date, name, attributes)
+        end
+
+        def datetime_field(name, attributes = {})
+          input _attributes(:datetime, name, attributes)
+        end
+
+        def datetime_local_field(name, attributes = {})
+          input _attributes(:'datetime-local', name, attributes)
+        end
+
+        def email_field(name, attributes = {})
+          input _attributes(:email, name, attributes)
+        end
+
+        def hidden_field(name, attributes = {})
+          input _attributes(:hidden, name, attributes)
+        end
+
+        def file_field(name, attributes = {})
+          attributes[:accept] = Array(attributes[:accept]).join(ACCEPT_SEPARATOR) if attributes.key?(:accept)
+          attributes = { type: :file, name: _input_name(name), id: _input_id(name) }.merge(attributes)
+
+          input(attributes)
+        end
+
+        def text_field(name, attributes = {})
+          input _attributes(:text, name, attributes)
+        end
+        alias_method :input_text, :text_field
+
+        def radio_button(name, value, attributes = {})
+          attributes = { type: :radio, name: _input_name(name), value: value }.merge(attributes)
+          attributes[:checked] = CHECKED if _value(name) == value
+          input(attributes)
+        end
+
+        def select(name, values, attributes = {})
+          options    = attributes.delete(:options) || {}
+          attributes = { name: _input_name(name), id: _input_id(name) }.merge(attributes)
+
+          super(attributes) do
+            values.each do |value, content|
+              if _value(name) == value
+                option(content, {value: value, selected: SELECTED}.merge(options))
+              else
+                option(content, {value: value}.merge(options))
+              end
+            end
+          end
+        end
+
+        def submit(content, attributes = {})
+          attributes = { type: :submit }.merge(attributes)
+          button(content, attributes)
+        end
+
+        private
+        def toplevel?
+          @attributes.any?
+        end
+
+        def _method_override!
+          verb = (@attributes.fetch(:method) { DEFAULT_METHOD }).to_s.upcase
+
+          if BROWSER_METHODS.include?(verb)
+            @attributes[:method] = verb
+          else
+            @attributes[:method] = DEFAULT_METHOD
+            @verb                = verb
+          end
+        end
+
+        def _attributes(type, name, attributes)
+          { type: type, name: _input_name(name), id: _input_id(name), value: _value(name) }.merge(attributes)
+        end
+
+        def _input_name(name)
+          "#{ @name }[#{ name }]"
+        end
+
+        def _input_id(name)
+          name = _input_name(name).gsub(/\[(?<token>[[[:word:]]\-]*)\]/, '-\k<token>')
+          Utils::String.new(name).dasherize
+        end
+
+        def _value(name)
+          name = _input_name(name).gsub(/\[(?<token>[[:word:]]*)\]/, '.\k<token>')
+          @params.get(name)
+        end
+
+        def _for(content, name)
+          _input_id(name || content)
+        end
+      end
+
+      def form_for(name, url, attributes = {}, &blk)
+        attributes = { action: url, id: "#{ name }-form", method: DEFAULT_METHOD }.merge(attributes)
+        FormBuilder.new(name, params, attributes, &blk)
+      end
+    end
+  end
+end
diff --git a/lib/lotus/helpers/html_helper/html_builder.rb b/lib/lotus/helpers/html_helper/html_builder.rb
index 17214d8..ce6c942 100644
--- a/lib/lotus/helpers/html_helper/html_builder.rb
+++ b/lib/lotus/helpers/html_helper/html_builder.rb
@@ -1,4 +1,5 @@
 require 'lotus/utils' # RUBY_VERSION >= '2.2'
+require 'lotus/utils/class_attribute'
 require 'lotus/utils/escape'
 require 'lotus/helpers/html_helper/empty_html_node'
 require 'lotus/helpers/html_helper/html_node'
@@ -149,7 +150,7 @@ class HtmlBuilder
         CONTENT_TAGS.each do |tag|
           class_eval %{
             def #{ tag }(content = nil, attributes = nil, &blk)
-              @nodes << HtmlNode.new(:#{ tag }, blk || content, attributes || content)
+              @nodes << self.class.html_node.new(:#{ tag }, blk || content, attributes || content, options)
               self
             end
           }
@@ -164,6 +165,11 @@ def #{ tag }(attributes = nil)
           }
         end
 
+        include Utils::ClassAttribute
+
+        class_attribute :html_node
+        self.html_node = ::Lotus::Helpers::HtmlHelper::HtmlNode
+
         # Initialize a new builder
         #
         # @return [Lotus::Helpers::HtmlHelper::HtmlBuilder] the builder
@@ -174,6 +180,9 @@ def initialize
           @nodes = []
         end
 
+        def options
+        end
+
         # Define a custom tag
         #
         # @param name [Symbol,String] the name of the tag
@@ -217,7 +226,7 @@ def initialize
         #   #  hello
         #   #</custom>
         def tag(name, content = nil, attributes = nil, &blk)
-          @nodes << HtmlNode.new(name, blk || content, attributes || content)
+          @nodes << HtmlNode.new(name, blk || content, attributes || content, options)
           self
         end
 
diff --git a/lib/lotus/helpers/html_helper/html_node.rb b/lib/lotus/helpers/html_helper/html_node.rb
index 28eea35..c1d016f 100644
--- a/lib/lotus/helpers/html_helper/html_node.rb
+++ b/lib/lotus/helpers/html_helper/html_node.rb
@@ -17,7 +17,7 @@ class HtmlNode < EmptyHtmlNode
         # @param attributes [Hash,NilClass] the optional tag attributes
         #
         # @return [Lotus::Helpers::HtmlHelper::HtmlNode]
-        def initialize(name, content, attributes)
+        def initialize(name, content, attributes, options = {})
           @builder = HtmlBuilder.new
           @name    = name
           @content = case content
diff --git a/test/fixtures.rb b/test/fixtures.rb
index e8c1fb7..f0ea8bb 100644
--- a/test/fixtures.rb
+++ b/test/fixtures.rb
@@ -1,4 +1,5 @@
 require 'lotus/view'
+require 'lotus/controller'
 require 'lotus/helpers/html_helper'
 require 'lotus/helpers/escape_helper'
 
@@ -195,11 +196,33 @@ def details
   end
 end
 
+class FormHelperView
+  include Lotus::Helpers::FormHelper
+  attr_reader :params
+
+  def initialize(params)
+    @params = Lotus::Action::Params.new(params)
+  end
+end
+
+class DeliveryParams < Lotus::Action::Params
+  param :delivery do
+    param :customer_id, type: Integer, presence: true
+    param :address do
+      param :street, type: String, presence: true
+    end
+  end
+end
+
 module FullStack
   class Routes
     def self.path(name)
       "/#{ name }"
     end
+
+    def self.deliveries
+      '/deliveries'
+    end
   end
 
   module Views
@@ -214,6 +237,13 @@ def routing_helper_path
         end
       end
     end
+
+    module Deliveries
+      class New
+        include TestView
+        template 'deliveries/new'
+      end
+    end
   end
 end
 
diff --git a/test/fixtures/templates/albums/new.html.erb b/test/fixtures/templates/albums/new.html.erb
new file mode 100644
index 0000000..1cb5582
--- /dev/null
+++ b/test/fixtures/templates/albums/new.html.erb
@@ -0,0 +1 @@
+<%= album_form %>
diff --git a/test/fixtures/templates/deliveries/new.html.erb b/test/fixtures/templates/deliveries/new.html.erb
new file mode 100644
index 0000000..176f242
--- /dev/null
+++ b/test/fixtures/templates/deliveries/new.html.erb
@@ -0,0 +1,23 @@
+<%=
+  form_for(:delivery, routes.deliveries, class: 'form-horizontal') do
+    div class: 'form-group' do
+      label :customer
+      input_text :customer, class: 'form-control', placeholder: 'Customer', name: nil
+
+      hidden_field :customer_id
+    end
+
+    fieldset do
+      legend 'Address'
+
+      fields_for :address do
+        div class: 'form-group' do
+          label :street
+          input_text :street, class: 'form-control', placeholder: 'Street'
+        end
+      end
+    end
+
+    submit 'Create', class: 'btn btn-default'
+  end
+%>
diff --git a/test/form_helper_test.rb b/test/form_helper_test.rb
new file mode 100644
index 0000000..80c6050
--- /dev/null
+++ b/test/form_helper_test.rb
@@ -0,0 +1,758 @@
+require 'test_helper'
+
+describe Lotus::Helpers::FormHelper do
+  let(:view)   { FormHelperView.new(params) }
+  let(:params) { Hash[] }
+  let(:action) { '/books' }
+
+  #
+  # FORM
+  #
+
+  describe '#form_for' do
+    it 'renders' do
+      actual = view.form_for(:book, action).to_s
+      actual.must_equal %(<form action="/books" id="book-form" method="POST"></form>)
+    end
+
+    it "allows to override 'id' attribute" do
+      actual = view.form_for(:book, action, id: 'books').to_s
+      actual.must_equal %(<form action="/books" id="books" method="POST"></form>)
+    end
+
+    it "allows to override 'method' attribute (get)" do
+      actual = view.form_for(:book, action, method: 'get').to_s
+      actual.must_equal %(<form action="/books" id="book-form" method="GET"></form>)
+    end
+
+    it "allows to override 'method' attribute (:get)" do
+      actual = view.form_for(:book, action, method: :get).to_s
+      actual.must_equal %(<form action="/books" id="book-form" method="GET"></form>)
+    end
+
+    it "allows to override 'method' attribute (GET)" do
+      actual = view.form_for(:book, action, method: 'GET').to_s
+      actual.must_equal %(<form action="/books" id="book-form" method="GET"></form>)
+    end
+
+    [:patch, :put, :delete].each do |verb|
+      it "allows to override 'method' attribute (#{ verb })" do
+        actual = view.form_for(:book, action, method: verb) do
+          text_field :title
+        end.to_s
+
+        actual.must_equal %(<form action="/books" id="book-form" method="POST">\n<input type="hidden" name="_method" value="#{ verb.to_s.upcase }">\n<input type="text" name="book[title]" id="book-title" value="">\n</form>)
+      end
+    end
+
+    it "allows to override 'action' attribute" do
+      actual = view.form_for(:book, action, action: '/b').to_s
+      actual.must_equal %(<form action="/b" id="book-form" method="POST"></form>)
+    end
+
+    it "allows to specify HTML attributes" do
+      actual = view.form_for(:book, action, class: 'form-horizonal').to_s
+      actual.must_equal %(<form action="/books" id="book-form" method="POST" class="form-horizonal"></form>)
+    end
+  end
+
+  #
+  # NESTED FIELDS
+  #
+
+  describe '#fields_for' do
+    it "renders" do
+      actual = view.form_for(:book, action) do
+        fields_for :categories do
+          text_field :name
+
+          fields_for :subcategories do
+            text_field :name
+          end
+
+          text_field :name2
+        end
+
+        text_field :title
+      end.to_s
+
+      actual.must_equal %(<form action="/books" id="book-form" method="POST">\n<input type="text" name="book[categories][name]" id="book-categories-name" value="">\n<input type="text" name="book[categories][subcategories][name]" id="book-categories-subcategories-name" value="">\n<input type="text" name="book[categories][name2]" id="book-categories-name2" value="">\n<input type="text" name="book[title]" id="book-title" value="">\n</form>)
+    end
+
+    describe "with filled params" do
+      let(:params) { Hash[book: { title: 'TDD', categories: { name: 'foo', name2: 'bar', subcategories: { name: 'sub' } } }] }
+
+      it "renders" do
+        actual = view.form_for(:book, action) do
+          fields_for :categories do
+            text_field :name
+
+            fields_for :subcategories do
+              text_field :name
+            end
+
+            text_field :name2
+          end
+
+          text_field :title
+        end.to_s
+
+        actual.must_equal %(<form action="/books" id="book-form" method="POST">\n<input type="text" name="book[categories][name]" id="book-categories-name" value="foo">\n<input type="text" name="book[categories][subcategories][name]" id="book-categories-subcategories-name" value="sub">\n<input type="text" name="book[categories][name2]" id="book-categories-name2" value="bar">\n<input type="text" name="book[title]" id="book-title" value="TDD">\n</form>)
+      end
+    end
+  end
+
+  #
+  # INPUT FIELDS
+  #
+
+  # describe '#check_box' do
+  #   it 'renders' do
+  #     actual = view.form_for(:book, action) do
+  #       check_box :free_shipping
+  #     end.to_s
+
+  #     actual.must_include %()
+  #   end
+  # end
+
+  describe "#color_field" do
+    it "renders" do
+      actual = view.form_for(:book, action) do
+        color_field :cover
+      end.to_s
+
+      actual.must_include %(<input type="color" name="book[cover]" id="book-cover" value="">)
+    end
+
+    it "allows to override 'id' attribute" do
+      actual = view.form_for(:book, action) do
+        color_field :cover, id: 'b-cover'
+      end.to_s
+
+      actual.must_include %(<input type="color" name="book[cover]" id="b-cover" value="">)
+    end
+
+    it "allows to override 'name' attribute" do
+      actual = view.form_for(:book, action) do
+        color_field :cover, name: 'cover'
+      end.to_s
+
+      actual.must_include %(<input type="color" name="cover" id="book-cover" value="">)
+    end
+
+    it "allows to override 'value' attribute" do
+      actual = view.form_for(:book, action) do
+        color_field :cover, value: '#ffffff'
+      end.to_s
+
+      actual.must_include %(<input type="color" name="book[cover]" id="book-cover" value="#ffffff">)
+    end
+
+    it "allows to specify HTML attributes" do
+      actual = view.form_for(:book, action) do
+        color_field :cover, class: 'form-control'
+      end.to_s
+
+      actual.must_include %(<input type="color" name="book[cover]" id="book-cover" value="" class="form-control">)
+    end
+
+    describe "with filled params" do
+      let(:params) { Hash[book: { cover: value }] }
+      let(:value)  { '#d3397e' }
+
+      it "renders with value" do
+        actual = view.form_for(:book, action) do
+          color_field :cover
+        end.to_s
+
+        actual.must_include %(<input type="color" name="book[cover]" id="book-cover" value="#{ value }">)
+      end
+
+      it "allows to override 'value' attribute" do
+        actual = view.form_for(:book, action) do
+          color_field :cover, value: '#000000'
+        end.to_s
+
+        actual.must_include %(<input type="color" name="book[cover]" id="book-cover" value="#000000">)
+      end
+    end
+  end
+
+  describe "#date_field" do
+    it "renders" do
+      actual = view.form_for(:book, action) do
+        date_field :release_date
+      end.to_s
+
+      actual.must_include %(<input type="date" name="book[release_date]" id="book-release-date" value="">)
+    end
+
+    it "allows to override 'id' attribute" do
+      actual = view.form_for(:book, action) do
+        date_field :release_date, id: 'release-date'
+      end.to_s
+
+      actual.must_include %(<input type="date" name="book[release_date]" id="release-date" value="">)
+    end
+
+    it "allows to override 'name' attribute" do
+      actual = view.form_for(:book, action) do
+        date_field :release_date, name: 'release_date'
+      end.to_s
+
+      actual.must_include %(<input type="date" name="release_date" id="book-release-date" value="">)
+    end
+
+    it "allows to override 'value' attribute" do
+      actual = view.form_for(:book, action) do
+        date_field :release_date, value: '2015-02-19'
+      end.to_s
+
+      actual.must_include %(<input type="date" name="book[release_date]" id="book-release-date" value="2015-02-19">)
+    end
+
+    it "allows to specify HTML attributes" do
+      actual = view.form_for(:book, action) do
+        date_field :release_date, class: 'form-control'
+      end.to_s
+
+      actual.must_include %(<input type="date" name="book[release_date]" id="book-release-date" value="" class="form-control">)
+    end
+
+    describe "with filled params" do
+      let(:params) { Hash[book: { release_date: value }] }
+      let(:value)  { '2014-06-23' }
+
+      it "renders with value" do
+        actual = view.form_for(:book, action) do
+          date_field :release_date
+        end.to_s
+
+        actual.must_include %(<input type="date" name="book[release_date]" id="book-release-date" value="#{ value }">)
+      end
+
+      it "allows to override 'value' attribute" do
+        actual = view.form_for(:book, action) do
+          date_field :release_date, value: '2015-03-23'
+        end.to_s
+
+        actual.must_include %(<input type="date" name="book[release_date]" id="book-release-date" value="2015-03-23">)
+      end
+    end
+  end
+
+  describe "#datetime_field" do
+    it "renders" do
+      actual = view.form_for(:book, action) do
+        datetime_field :published_at
+      end.to_s
+
+      actual.must_include %(<input type="datetime" name="book[published_at]" id="book-published-at" value="">)
+    end
+
+    it "allows to override 'id' attribute" do
+      actual = view.form_for(:book, action) do
+        datetime_field :published_at, id: 'published-timestamp'
+      end.to_s
+
+      actual.must_include %(<input type="datetime" name="book[published_at]" id="published-timestamp" value="">)
+    end
+
+    it "allows to override 'name' attribute" do
+      actual = view.form_for(:book, action) do
+        datetime_field :published_at, name: 'book[published][timestamp]'
+      end.to_s
+
+      actual.must_include %(<input type="datetime" name="book[published][timestamp]" id="book-published-at" value="">)
+    end
+
+    it "allows to override 'value' attribute" do
+      actual = view.form_for(:book, action) do
+        datetime_field :published_at, value: '2015-02-19T12:50:36Z'
+      end.to_s
+
+      actual.must_include %(<input type="datetime" name="book[published_at]" id="book-published-at" value="2015-02-19T12:50:36Z">)
+    end
+
+    it "allows to specify HTML attributes" do
+      actual = view.form_for(:book, action) do
+        datetime_field :published_at, class: 'form-control'
+      end.to_s
+
+      actual.must_include %(<input type="datetime" name="book[published_at]" id="book-published-at" value="" class="form-control">)
+    end
+
+    describe "with filled params" do
+      let(:params) { Hash[book: { published_at: value }] }
+      let(:value)  { '2015-02-19T12:56:31Z' }
+
+      it "renders with value" do
+        actual = view.form_for(:book, action) do
+          datetime_field :published_at
+        end.to_s
+
+        actual.must_include %(<input type="datetime" name="book[published_at]" id="book-published-at" value="#{ value }">)
+      end
+
+      it "allows to override 'value' attribute" do
+        actual = view.form_for(:book, action) do
+          datetime_field :published_at, value: '2015-02-19T12:50:36Z'
+        end.to_s
+
+        actual.must_include %(<input type="datetime" name="book[published_at]" id="book-published-at" value="2015-02-19T12:50:36Z">)
+      end
+    end
+  end
+
+  describe "#datetime_local_field" do
+    it "renders" do
+      actual = view.form_for(:book, action) do
+        datetime_local_field :released_at
+      end.to_s
+
+      actual.must_include %(<input type="datetime-local" name="book[released_at]" id="book-released-at" value="">)
+    end
+
+    it "allows to override 'id' attribute" do
+      actual = view.form_for(:book, action) do
+        datetime_local_field :released_at, id: 'local-release-timestamp'
+      end.to_s
+
+      actual.must_include %(<input type="datetime-local" name="book[released_at]" id="local-release-timestamp" value="">)
+    end
+
+    it "allows to override 'name' attribute" do
+      actual = view.form_for(:book, action) do
+        datetime_local_field :released_at, name: 'book[release-timestamp]'
+      end.to_s
+
+      actual.must_include %(<input type="datetime-local" name="book[release-timestamp]" id="book-released-at" value="">)
+    end
+
+    it "allows to override 'value' attribute" do
+      actual = view.form_for(:book, action) do
+        datetime_local_field :released_at, value: '2015-02-19T14:01:28+01:00'
+      end.to_s
+
+      actual.must_include %(<input type="datetime-local" name="book[released_at]" id="book-released-at" value="2015-02-19T14:01:28+01:00">)
+    end
+
+    it "allows to specify HTML attributes" do
+      actual = view.form_for(:book, action) do
+        datetime_local_field :released_at, class: 'form-control'
+      end.to_s
+
+      actual.must_include %(<input type="datetime-local" name="book[released_at]" id="book-released-at" value="" class="form-control">)
+    end
+
+    describe "with filled params" do
+      let(:params) { Hash[book: { released_at: value }] }
+      let(:value)  { '2015-02-19T14:11:19+01:00' }
+
+      it "renders with value" do
+        actual = view.form_for(:book, action) do
+          datetime_local_field :released_at
+        end.to_s
+
+        actual.must_include %(<input type="datetime-local" name="book[released_at]" id="book-released-at" value="#{ value }">)
+      end
+
+      it "allows to override 'value' attribute" do
+        actual = view.form_for(:book, action) do
+          datetime_local_field :released_at, value: '2015-02-19T14:01:28+01:00'
+        end.to_s
+
+        actual.must_include %(<input type="datetime-local" name="book[released_at]" id="book-released-at" value="2015-02-19T14:01:28+01:00">)
+      end
+    end
+  end
+
+  describe "#email_field" do
+    it "renders" do
+      actual = view.form_for(:book, action) do
+        email_field :publisher_email
+      end.to_s
+
+      actual.must_include %(<input type="email" name="book[publisher_email]" id="book-publisher-email" value="">)
+    end
+
+    it "allows to override 'id' attribute" do
+      actual = view.form_for(:book, action) do
+        email_field :publisher_email, id: 'publisher-email'
+      end.to_s
+
+      actual.must_include %(<input type="email" name="book[publisher_email]" id="publisher-email" value="">)
+    end
+
+    it "allows to override 'name' attribute" do
+      actual = view.form_for(:book, action) do
+        email_field :publisher_email, name: 'book[email]'
+      end.to_s
+
+      actual.must_include %(<input type="email" name="book[email]" id="book-publisher-email" value="">)
+    end
+
+    it "allows to override 'value' attribute" do
+      actual = view.form_for(:book, action) do
+        email_field :publisher_email, value: 'publisher@example.org'
+      end.to_s
+
+      actual.must_include %(<input type="email" name="book[publisher_email]" id="book-publisher-email" value="publisher@example.org">)
+    end
+
+    it "allows to specify 'multiple' attribute" do
+      actual = view.form_for(:book, action) do
+        email_field :publisher_email, multiple: true
+      end.to_s
+
+      actual.must_include %(<input type="email" name="book[publisher_email]" id="book-publisher-email" value="" multiple="true">)
+    end
+
+    it "allows to specify HTML attributes" do
+      actual = view.form_for(:book, action) do
+        email_field :publisher_email, class: 'form-control'
+      end.to_s
+
+      actual.must_include %(<input type="email" name="book[publisher_email]" id="book-publisher-email" value="" class="form-control">)
+    end
+
+    describe "with filled params" do
+      let(:params) { Hash[book: { publisher_email: value }] }
+      let(:value)  { 'maria@publisher.org' }
+
+      it "renders with value" do
+        actual = view.form_for(:book, action) do
+          email_field :publisher_email
+        end.to_s
+
+        actual.must_include %(<input type="email" name="book[publisher_email]" id="book-publisher-email" value="maria@publisher.org">)
+      end
+
+      it "allows to override 'value' attribute" do
+        actual = view.form_for(:book, action) do
+          email_field :publisher_email, value: 'publisher@example.org'
+        end.to_s
+
+        actual.must_include %(<input type="email" name="book[publisher_email]" id="book-publisher-email" value="publisher@example.org">)
+      end
+    end
+  end
+
+  describe "#file_field" do
+    it "renders" do
+      actual = view.form_for(:book, action) do
+        file_field :image_cover
+      end.to_s
+
+      actual.must_include %(<input type="file" name="book[image_cover]" id="book-image-cover">)
+    end
+
+    it "sets 'enctype' attribute to the form"
+    # it "sets 'enctype' attribute to the form" do
+    #   actual = view.form_for(:book, action) do
+    #     file_field :image_cover
+    #   end.to_s
+
+    #   actual.must_include %(<form action="/books" id="book-form" method="POST" enctype="multipart/form-data">)
+    # end
+
+    it "sets 'enctype' attribute to the form when there are nested fields"
+    # it "sets 'enctype' attribute to the form when there are nested fields" do
+    #   actual = view.form_for(:book, action) do
+    #     fields_for :images do
+    #       file_field :cover
+    #     end
+    #   end.to_s
+
+    #   actual.must_include %(<form action="/books" id="book-form" method="POST" enctype="multipart/form-data">)
+    # end
+
+    it "allows to override 'id' attribute" do
+      actual = view.form_for(:book, action) do
+        file_field :image_cover, id: 'book-cover'
+      end.to_s
+
+      actual.must_include %(<input type="file" name="book[image_cover]" id="book-cover">)
+    end
+
+    it "allows to override 'name' attribute" do
+      actual = view.form_for(:book, action) do
+        file_field :image_cover, name: 'book[cover]'
+      end.to_s
+
+      actual.must_include %(<input type="file" name="book[cover]" id="book-image-cover">)
+    end
+
+    it "allows to specify 'multiple' attribute" do
+      actual = view.form_for(:book, action) do
+        file_field :image_cover, multiple: true
+      end.to_s
+
+      actual.must_include %(<input type="file" name="book[image_cover]" id="book-image-cover" multiple="true">)
+    end
+
+    it "allows to specify single value for 'accept' attribute" do
+      actual = view.form_for(:book, action) do
+        file_field :image_cover, accept: 'application/pdf'
+      end.to_s
+
+      actual.must_include %(<input type="file" name="book[image_cover]" id="book-image-cover" accept="application/pdf">)
+    end
+
+    it "allows to specify multiple values for 'accept' attribute" do
+      actual = view.form_for(:book, action) do
+        file_field :image_cover, accept: 'image/png,image/jpg'
+      end.to_s
+
+      actual.must_include %(<input type="file" name="book[image_cover]" id="book-image-cover" accept="image/png,image/jpg">)
+    end
+
+    it "allows to specify multiple values (array) for 'accept' attribute" do
+      actual = view.form_for(:book, action) do
+        file_field :image_cover, accept: ['image/png', 'image/jpg']
+      end.to_s
+
+      actual.must_include %(<input type="file" name="book[image_cover]" id="book-image-cover" accept="image/png,image/jpg">)
+    end
+
+    describe "with filled params" do
+      let(:params) { Hash[book: { image_cover: value }] }
+      let(:value)  { 'image' }
+
+      it "ignores value" do
+        actual = view.form_for(:book, action) do
+          file_field :image_cover
+        end.to_s
+
+        actual.must_include %(<input type="file" name="book[image_cover]" id="book-image-cover">)
+      end
+    end
+  end
+
+  describe "#hidden_field" do
+    it "renders" do
+      actual = view.form_for(:book, action) do
+        hidden_field :author_id
+      end.to_s
+
+      actual.must_include %(<input type="hidden" name="book[author_id]" id="book-author-id" value="">)
+    end
+
+    it "allows to override 'id' attribute" do
+      actual = view.form_for(:book, action) do
+        hidden_field :author_id, id: 'author-id'
+      end.to_s
+
+      actual.must_include %(<input type="hidden" name="book[author_id]" id="author-id" value="">)
+    end
+
+    it "allows to override 'name' attribute" do
+      actual = view.form_for(:book, action) do
+        hidden_field :author_id, name: 'book[author]'
+      end.to_s
+
+      actual.must_include %(<input type="hidden" name="book[author]" id="book-author-id" value="">)
+    end
+
+    it "allows to override 'value' attribute" do
+      actual = view.form_for(:book, action) do
+        hidden_field :author_id, value: '23'
+      end.to_s
+
+      actual.must_include %(<input type="hidden" name="book[author_id]" id="book-author-id" value="23">)
+    end
+
+    it "allows to specify HTML attributes" do
+      actual = view.form_for(:book, action) do
+        hidden_field :author_id, class: 'form-details'
+      end.to_s
+
+      actual.must_include %(<input type="hidden" name="book[author_id]" id="book-author-id" value="" class="form-details">)
+    end
+
+    describe "with filled params" do
+      let(:params) { Hash[book: { author_id: value }] }
+      let(:value)  { '1' }
+
+      it "renders with value" do
+        actual = view.form_for(:book, action) do
+          hidden_field :author_id
+        end.to_s
+
+        actual.must_include %(<input type="hidden" name="book[author_id]" id="book-author-id" value="1">)
+      end
+
+      it "allows to override 'value' attribute" do
+        actual = view.form_for(:book, action) do
+          hidden_field :author_id, value: '23'
+        end.to_s
+
+        actual.must_include %(<input type="hidden" name="book[author_id]" id="book-author-id" value="23">)
+      end
+    end
+  end
+
+  describe "#text_field" do
+    it "renders" do
+      actual = view.form_for(:book, action) do
+        text_field :title
+      end.to_s
+
+      actual.must_include %(<input type="text" name="book[title]" id="book-title" value="">)
+    end
+
+    it "allows to override 'id' attribute" do
+      actual = view.form_for(:book, action) do
+        text_field :title, id: 'book-short-title'
+      end.to_s
+
+      actual.must_include %(<input type="text" name="book[title]" id="book-short-title" value="">)
+    end
+
+    it "allows to override 'name' attribute" do
+      actual = view.form_for(:book, action) do
+        text_field :title, name: 'book[short_title]'
+      end.to_s
+
+      actual.must_include %(<input type="text" name="book[short_title]" id="book-title" value="">)
+    end
+
+    it "allows to override 'value' attribute" do
+      actual = view.form_for(:book, action) do
+        text_field :title, value: 'Refactoring'
+      end.to_s
+
+      actual.must_include %(<input type="text" name="book[title]" id="book-title" value="Refactoring">)
+    end
+
+    it "allows to specify HTML attributes" do
+      actual = view.form_for(:book, action) do
+        text_field :title, class: 'form-control'
+      end.to_s
+
+      actual.must_include %(<input type="text" name="book[title]" id="book-title" value="" class="form-control">)
+    end
+
+    describe "with filled params" do
+      let(:params) { Hash[book: { title: value }] }
+      let(:value)  { 'PPoEA' }
+
+      it "renders with value" do
+        actual = view.form_for(:book, action) do
+          text_field :title
+        end.to_s
+
+        actual.must_include %(<input type="text" name="book[title]" id="book-title" value="PPoEA">)
+      end
+
+      it "allows to override 'value' attribute" do
+        actual = view.form_for(:book, action) do
+          text_field :title, value: 'DDD'
+        end.to_s
+
+        actual.must_include %(<input type="text" name="book[title]" id="book-title" value="DDD">)
+      end
+    end
+  end
+
+  describe "#radio_button" do
+    it "renders" do
+      actual = view.form_for(:book, action) do
+        radio_button :category, 'Fiction'
+        radio_button :category, 'Non-Fiction'
+      end.to_s
+
+      actual.must_include %(<input type="radio" name="book[category]" value="Fiction">\n<input type="radio" name="book[category]" value="Non-Fiction">)
+    end
+
+    it "allows to override 'name' attribute" do
+      actual = view.form_for(:book, action) do
+        radio_button :category, 'Fiction',     name: 'category_name'
+        radio_button :category, 'Non-Fiction', name: 'category_name'
+      end.to_s
+
+      actual.must_include %(<input type="radio" name="category_name" value="Fiction">\n<input type="radio" name="category_name" value="Non-Fiction">)
+    end
+
+    it "allows to specify HTML attributes" do
+      actual = view.form_for(:book, action) do
+        radio_button :category, 'Fiction',     class: 'form-control'
+        radio_button :category, 'Non-Fiction', class: 'radio-button'
+      end.to_s
+
+      actual.must_include %(<input type="radio" name="book[category]" value="Fiction" class="form-control">\n<input type="radio" name="book[category]" value="Non-Fiction" class="radio-button">)
+    end
+
+    describe "with filled params" do
+      let(:params) { Hash[book: { category: value }] }
+      let(:value)  { 'Non-Fiction' }
+
+      it "renders with value" do
+        actual = view.form_for(:book, action) do
+          radio_button :category, 'Fiction'
+          radio_button :category, 'Non-Fiction'
+        end.to_s
+
+        actual.must_include %(<input type="radio" name="book[category]" value="Fiction">\n<input type="radio" name="book[category]" value="Non-Fiction" checked="checked">)
+      end
+    end
+  end
+
+  describe "#select" do
+    let(:values) { Hash['it' => 'Italy', 'us' => 'United States'] }
+
+    it "renders" do
+      actual = view.form_for(:book, action) do
+        select :store, values
+      end.to_s
+
+      actual.must_include %(<select name="book[store]" id="book-store">\n<option value="it">Italy</option>\n<option value="us">United States</option>\n</select>)
+    end
+
+    it "allows to override 'id' attribute" do
+      actual = view.form_for(:book, action) do
+        select :store, values, id: 'store'
+      end.to_s
+
+      actual.must_include %(<select name="book[store]" id="store">\n<option value="it">Italy</option>\n<option value="us">United States</option>\n</select>)
+    end
+
+    it "allows to override 'name' attribute" do
+      actual = view.form_for(:book, action) do
+        select :store, values, name: 'store'
+      end.to_s
+
+      actual.must_include %(<select name="store" id="book-store">\n<option value="it">Italy</option>\n<option value="us">United States</option>\n</select>)
+    end
+
+    it "allows to specify HTML attributes" do
+      actual = view.form_for(:book, action) do
+        select :store, values, class: 'form-control'
+      end.to_s
+
+      actual.must_include %(<select name="book[store]" id="book-store" class="form-control">\n<option value="it">Italy</option>\n<option value="us">United States</option>\n</select>)
+    end
+
+    it "allows to specify HTML attributes for options" do
+      actual = view.form_for(:book, action) do
+        select :store, values, options: { class: 'form-option' }
+      end.to_s
+
+      actual.must_include %(<select name="book[store]" id="book-store">\n<option value="it" class="form-option">Italy</option>\n<option value="us" class="form-option">United States</option>\n</select>)
+    end
+
+    describe "with filled params" do
+      let(:params) { Hash[book: { store: value }] }
+      let(:value)  { 'it' }
+
+      it "renders with value" do
+        actual = view.form_for(:book, action) do
+          select :store, values
+        end.to_s
+
+        actual.must_include %(<select name="book[store]" id="book-store">\n<option value="it" selected="selected">Italy</option>\n<option value="us">United States</option>\n</select>)
+      end
+    end
+  end
+end
diff --git a/test/integration/form_helper_test.rb b/test/integration/form_helper_test.rb
new file mode 100644
index 0000000..0fce0b3
--- /dev/null
+++ b/test/integration/form_helper_test.rb
@@ -0,0 +1,27 @@
+require 'test_helper'
+
+describe 'Form helper' do
+  describe 'first page load' do
+    before do
+      @params = DeliveryParams.new({})
+      @actual = FullStack::Views::Deliveries::New.render(format: :html, params: @params)
+    end
+
+    it 'renders the form' do
+      @actual.must_include %(<form action="/deliveries" id="delivery-form" method="POST" class="form-horizontal">\n<div class="form-group">\n<label for="delivery-customer">Customer</label>\n<input type="text" name="" id="delivery-customer" value="" class="form-control" placeholder="Customer">\n<input type="hidden" name="delivery[customer_id]" id="delivery-customer-id" value="">\n</div>\n<fieldset>\n<legend>Address</legend>\n<div class="form-group">\n<label for="delivery-address-street">Street</label>\n<input type="text" name="delivery[address][street]" id="delivery-address-street" value="" class="form-control" placeholder="Street">\n</div>\n</fieldset>\n<button type="submit" class="btn btn-default">Create</button>\n</form>)
+    end
+  end
+
+  describe 'after a failed form submission' do
+    before do
+      @params = DeliveryParams.new({ delivery: { address: { street: '5th Ave' }}})
+      @params.valid? # trigger validations
+
+      @actual = FullStack::Views::Deliveries::New.render(format: :html, params: @params)
+    end
+
+    it 'renders the form with previous values' do
+      @actual.must_include %(<form action="/deliveries" id="delivery-form" method="POST" class="form-horizontal">\n<div class="form-group">\n<label for="delivery-customer">Customer</label>\n<input type="text" name="" id="delivery-customer" value="" class="form-control" placeholder="Customer">\n<input type="hidden" name="delivery[customer_id]" id="delivery-customer-id" value="">\n</div>\n<fieldset>\n<legend>Address</legend>\n<div class="form-group">\n<label for="delivery-address-street">Street</label>\n<input type="text" name="delivery[address][street]" id="delivery-address-street" value="5th Ave" class="form-control" placeholder="Street">\n</div>\n</fieldset>\n<button type="submit" class="btn btn-default">Create</button>\n</form>)
+    end
+  end
+end