Add feature testing support

spec/features/setting_management_spec.rb

@@ -0,0 +1,37 @@
+require 'rails_helper'
+
+feature 'Setting management' do
+  background { Fabricate(:setting_group) }
+
+  scenario 'User changes a setting', js: true do
+    visit root_path
+
+    # This ensures javascript works correctly
+    expect(page).to have_no_link 'Setting groups'
+    click_on 'Settings'
+    expect(page).to have_link 'Setting groups'
+
+    click_on 'Setting groups'
+    expect(page).to have_text('Domain validation')
+    click_on 'Edit settings'
+    expect(page).to have_text('Nameserver minimum count')
+    expect(page).to have_text('Nameserver maximum count')
+
+    val_min = find_field('Nameserver minimum count').value
+    val_max = find_field('Nameserver maximum count').value
+
+    expect(val_min).to eq('1')
+    expect(val_max).to eq('13')
+
+    fill_in('Nameserver minimum count', with: '3')
+    fill_in('Nameserver maximum count', with: '10')
+
+    click_on 'Save'
+
+    val_min = find_field('Nameserver minimum count').value
+    val_max = find_field('Nameserver maximum count').value
+
+    expect(val_min).to eq('3')
+    expect(val_max).to eq('10')
+  end
+end