FEATURE: new site setting 'max_emojis_in_title'

spec/components/validators/max_emojis_validator_spec.rb

@@ -0,0 +1,50 @@
+# encoding: UTF-8
+
+require 'rails_helper'
+require 'validators/max_emojis_validator'
+
+describe MaxEmojisValidator do
+
+  # simulate Rails behavior (singleton)
+  def validate
+    @validator ||= MaxEmojisValidator.new(attributes: :title)
+    @validator.validate_each(record, :title, record.title)
+  end
+
+  shared_examples "validating any topic title" do
+    it 'adds an error when emoji count is greater than SiteSetting.max_emojis_in_title' do
+      SiteSetting.max_emojis_in_title = 3
+      record.title = '🧐 Lots of emojis here 🎃 :joy: :sunglasses:'
+      validate
+      expect(record.errors[:title]).to be_present
+    end
+  end
+
+  describe 'topic' do
+    let(:record) { Fabricate.build(:topic) }
+
+    it 'does not add an error when emoji count is good' do
+      SiteSetting.max_emojis_in_title = 2
+
+      record.title = 'To Infinity and beyond! 🚀 :woman:t5:'
+      validate
+      expect(record.errors[:title]).to_not be_present
+    end
+
+    include_examples "validating any topic title"
+  end
+
+  describe 'private message' do
+    let(:record) { Fabricate.build(:private_message_topic) }
+
+    it 'does not add an error when emoji count is good' do
+      SiteSetting.max_emojis_in_title = 1
+
+      record.title = 'To Infinity and beyond! 🚀'
+      validate
+      expect(record.errors[:title]).to_not be_present
+    end
+
+    include_examples "validating any topic title"
+  end
+end