Simplify model validation spec in AccountModerationNote/ReportNote (#31792)

spec/models/account_moderation_note_spec.rb

@@ -3,7 +3,8 @@
 require 'rails_helper'
 
 RSpec.describe AccountModerationNote do
-  describe 'chronological scope' do
+  describe 'Scopes' do
+    describe '.chronological' do
       it 'returns account moderation notes oldest to newest' do
         account = Fabricate(:account)
         note1 = Fabricate(:account_moderation_note, target_account: account)
@@ -12,20 +13,14 @@ RSpec.describe AccountModerationNote do
         expect(account.targeted_moderation_notes.chronological).to eq [note1, note2]
       end
     end
-
-  describe 'validations' do
-    it 'is invalid if the content is empty' do
-      report = Fabricate.build(:account_moderation_note, content: '')
-      expect(report.valid?).to be false
   end
 
-    it 'is invalid if content is longer than character limit' do
-      report = Fabricate.build(:account_moderation_note, content: comment_over_limit)
-      expect(report.valid?).to be false
-    end
+  describe 'Validations' do
+    subject { Fabricate.build :account_moderation_note }
 
-    def comment_over_limit
-      Faker::Lorem.paragraph_by_chars(number: described_class::CONTENT_SIZE_LIMIT * 2)
+    describe 'content' do
+      it { is_expected.to_not allow_value('').for(:content) }
+      it { is_expected.to validate_length_of(:content).is_at_most(described_class::CONTENT_SIZE_LIMIT) }
     end
   end
 end

spec/models/report_note_spec.rb

@@ -3,7 +3,8 @@
 require 'rails_helper'
 
 RSpec.describe ReportNote do
-  describe 'chronological scope' do
+  describe 'Scopes' do
+    describe '.chronological' do
       it 'returns report notes oldest to newest' do
         report = Fabricate(:report)
         note1 = Fabricate(:report_note, report: report)
@@ -12,20 +13,14 @@ RSpec.describe ReportNote do
         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
+  describe 'Validations' do
+    subject { Fabricate.build :report_note }
 
-    def comment_over_limit
-      Faker::Lorem.paragraph_by_chars(number: described_class::CONTENT_SIZE_LIMIT * 2)
+    describe 'content' do
+      it { is_expected.to_not allow_value('').for(:content) }
+      it { is_expected.to validate_length_of(:content).is_at_most(described_class::CONTENT_SIZE_LIMIT) }
     end
   end
 end