Sign up new users on sign in

test/controllers/sessions_controller_test.rb

@@ -24,12 +24,15 @@ class SessionsControllerTest < ActionDispatch::IntegrationTest
 
   test "create for a new user" do
     untenanted do
-      assert_no_difference -> { MagicLink.count } do
-        post session_path,
-          params: { email_address: "nonexistent-#{SecureRandom.hex(6)}@example.com" }
+      assert_difference -> { MagicLink.count }, +1 do
+        assert_difference -> { Identity.count }, +1 do
+          post session_path,
+            params: { email_address: "nonexistent-#{SecureRandom.hex(6)}@example.com" }
+        end
       end
 
       assert_redirected_to session_magic_link_path
+      assert MagicLink.last.for_sign_up?
     end
   end