Fix sort order of moderation notes on Reports and Accounts (#31528)

spec/models/report_note_spec.rb

@@ -0,0 +1,31 @@
+# frozen_string_literal: true
+
+require 'rails_helper'
+
+RSpec.describe ReportNote do
+  describe 'chronological scope' do
+    it 'returns report notes oldest to newest' do
+      report = Fabricate(:report)
+      note1 = Fabricate(:report_note, report: report)
+      note2 = Fabricate(:report_note, report: report)
+
+      expect(report.notes.chronological).to eq [note1, note2]
+    end
+  end
+
+  describe 'validations' do
+    it 'is invalid if the content is empty' do
+      report = Fabricate.build(:report_note, content: '')
+      expect(report.valid?).to be false
+    end
+
+    it 'is invalid if content is longer than character limit' do
+      report = Fabricate.build(:report_note, content: comment_over_limit)
+      expect(report.valid?).to be false
+    end
+
+    def comment_over_limit
+      Faker::Lorem.paragraph_by_chars(number: described_class::CONTENT_SIZE_LIMIT * 2)
+    end
+  end
+end