Allow hints on select fields

Just like we allow them on input fields.

lib/consul_form_builder.rb

@@ -35,6 +35,13 @@ class ConsulFormBuilder < FoundationRailsHelper::FormBuilder
     super(attribute, tag_value, { label: default_label }.merge(options))
   end
 
+  def select(attribute, choices, options = {}, html_options = {})
+    label_with_hint(attribute, options.merge(label_options: label_options_for(options))) +
+      super(attribute, choices, options.merge(label: false, hint: nil), html_options.merge({
+        aria: { describedby: help_text_id(attribute, options) }
+      }))
+  end
+
   private
 
     def custom_label(attribute, text, options)

spec/lib/consul_form_builder_spec.rb

@@ -3,7 +3,8 @@ require "rails_helper"
 describe ConsulFormBuilder do
   class DummyModel
     include ActiveModel::Model
-    attr_accessor :title
+    OPTIONS = %w[Good Bad Ugly].freeze
+    attr_accessor :title, :quality
   end
 
   let(:builder) { ConsulFormBuilder.new(:dummy, DummyModel.new, ActionView::Base.new, {}) }
@@ -30,6 +31,27 @@ describe ConsulFormBuilder do
     end
   end
 
+  describe "#select" do
+    it "renders the label and the select with the given options" do
+      render builder.select(:quality, DummyModel::OPTIONS)
+
+      expect(page).to have_css "label", count: 1
+      expect(page).to have_css "label", text: "Quality"
+      expect(page).to have_css "select", count: 1
+      expect(page).to have_css "option", count: 3
+      expect(page).to have_css "option", text: "Good"
+      expect(page).to have_css "option", text: "Bad"
+      expect(page).to have_css "option", text: "Ugly"
+    end
+
+    it "accepts hints" do
+      render builder.select(:quality, DummyModel::OPTIONS, hint: "Ugly is neither good nor bad")
+
+      expect(page).to have_css ".help-text", text: "Ugly is neither good nor bad"
+      expect(page).to have_css "select[aria-describedby='dummy_quality-help-text']"
+    end
+  end
+
   attr_reader :content
 
   def render(content)