Add specs for display name update

spec/features/settings/profile_spec.rb

@@ -0,0 +1,45 @@
+require 'rails_helper'
+
+RSpec.describe 'Profile settings', type: :feature do
+  let(:user) { create :user, cn: "mwahlberg" }
+
+  before do
+    login_as user, :scope => :user
+  end
+
+  feature "Update display name" do
+    before do
+      allow(user).to receive(:display_name).and_return("Mark")
+      allow_any_instance_of(User).to receive(:dn).and_return("cn=mwahlberg,ou=kosmos.org,cn=users,dc=kosmos,dc=org")
+      allow_any_instance_of(User).to receive(:ldap_entry).and_return({
+        uid: user.cn, ou: user.ou, display_name: "Mark"
+      })
+    end
+
+    scenario 'fails with validation error' do
+      visit setting_path(:profile)
+      fill_in 'Display name', with: "M"
+      click_button "Save"
+
+      expect(current_url).to eq(setting_url(:profile))
+      expect(page).to have_field('Display name', with: 'M')
+      within ".error-msg" do
+        expect(page).to have_content("is too short")
+      end
+    end
+
+    scenario 'works with valid input' do
+      expect(LdapManager::UpdateDisplayName).to receive(:call)
+        .with(user.dn, "Marky Mark").and_return(true)
+
+      visit setting_path(:profile)
+      fill_in 'Display name', with: "Marky Mark"
+      click_button "Save"
+
+      expect(current_url).to eq(setting_url(:profile))
+      within ".flash-msg" do
+        expect(page).to have_content("Settings saved")
+      end
+    end
+  end
+end