DEV: upgrade reject reason reviewable modal to glimmer component (#24073)

* DEV: add system test for rejecting user from review page
* DEV: upgrade reject-reason-reviewable modal to glimmer & DModal

spec/system/page_objects/modals/reject_reason_reviewable.rb

@@ -0,0 +1,25 @@
+# frozen_string_literal: true
+
+module PageObjects
+  module Modals
+    class RejectReasonReviewable < PageObjects::Modals::Base
+      def modal
+        find(".reject-reason-reviewable-modal")
+      end
+
+      def select_send_rejection_email_checkbox
+        modal.find(".reject-reason-reviewable-modal__send_email--inline").check
+      end
+
+      def fill_in_rejection_reason(reason)
+        modal.find(".reject-reason-reviewable-modal__explain-reviewable textarea").fill_in(
+          with: reason,
+        )
+      end
+
+      def delete_user
+        modal.find(".modal-footer .btn.btn-danger").click
+      end
+    end
+  end
+end

spec/system/page_objects/pages/review.rb

@@ -64,6 +64,13 @@ module PageObjects
         within(reviewable_by_id(reviewable.id)) { page.has_css?(".status .rejected") }
       end
 
+      def has_reviewable_with_rejection_reason?(reviewable, rejection_reason)
+        reviewable_by_id(reviewable.id).has_css?(
+          ".reviewable-user-details.reject-reason .value",
+          text: rejection_reason,
+        )
+      end
+
       def has_error_dialog_visible?
         page.has_css?(".dialog-container .dialog-content")
       end

spec/system/reviewables_spec.rb

@@ -56,6 +56,39 @@ describe "Reviewables", type: :system do
     end
   end
 
+  describe "when there is a reviewable user" do
+    fab!(:user) { Fabricate(:user) }
+    let(:rejection_reason_modal) { PageObjects::Modals::RejectReasonReviewable.new }
+
+    before do
+      SiteSetting.must_approve_users = true
+      Jobs.run_immediately!
+      user.update!(approved: false)
+      user.activate
+    end
+
+    it "Rejecting user sends rejection email and updates reviewable with rejection reason" do
+      rejection_reason = "user is spamming"
+      reviewable = ReviewableUser.find_by_target_id(user.id)
+      # cache it for later assertion instead of querying UserHistory
+      user_email = user.email
+
+      review_page.visit_reviewable(reviewable)
+      review_page.select_bundled_action(reviewable, "user-delete_user")
+      rejection_reason_modal.fill_in_rejection_reason(rejection_reason)
+      rejection_reason_modal.select_send_rejection_email_checkbox
+      rejection_reason_modal.delete_user
+
+      expect(review_page).to have_reviewable_with_rejected_status(reviewable)
+      expect(review_page).to have_reviewable_with_rejection_reason(reviewable, rejection_reason)
+
+      mail = ActionMailer::Base.deliveries.first
+      expect(mail.to).to eq([user_email])
+      expect(mail.subject).to match(/You've been rejected on Discourse/)
+      expect(mail.body.raw_source).to include rejection_reason
+    end
+  end
+
   context "when performing a review action from the show route" do
     context "with a ReviewableQueuedPost" do
       fab!(:queued_post_reviewable) { Fabricate(:reviewable_queued_post) }