Fix #5143: Allow name changes with same name but changed case.

test/unit/user_name_change_request_test.rb

@@ -3,8 +3,8 @@ require 'test_helper'
 class UserNameChangeRequestTest < ActiveSupport::TestCase
   context "in all cases" do
     setup do
-      @admin = FactoryBot.create(:admin_user)
-      @requester = FactoryBot.create(:user)
+      @admin = create(:admin_user)
+      @requester = create(:user, name: "provence")
     end
 
     context "creating a new request" do
@@ -15,10 +15,11 @@ class UserNameChangeRequestTest < ActiveSupport::TestCase
 
       should "not validate if the desired name already exists" do
         assert_difference("UserNameChangeRequest.count", 0) do
-          req = build(:user_name_change_request, user: @requester, original_name: @requester.name, desired_name: @requester.name)
+          user = create(:user)
+          req = build(:user_name_change_request, user: user, original_name: user.name, desired_name: @requester.name)
           req.valid?
 
-          assert_equal(["Desired name already exists"], req.errors.full_messages)
+          assert_equal(["Desired name already taken"], req.errors.full_messages)
         end
       end
 
@@ -27,6 +28,12 @@ class UserNameChangeRequestTest < ActiveSupport::TestCase
 
         assert_equal("Provence", @requester.name)
       end
+
+      should "allow the user to change the case of their name" do
+        uncr = create(:user_name_change_request, user: @requester, original_name: "provence", desired_name: "Provence")
+
+        assert_equal("Provence", @requester.name)
+      end
     end
   end
 end