Add min_private_message_title_length site setting so private messages can have short titles

spec/components/validators/topic_title_length_validator_spec.rb

@@ -0,0 +1,60 @@
+# encoding: UTF-8
+
+require 'spec_helper'
+require 'validators/topic_title_length_validator'
+
+describe TopicTitleLengthValidator do
+
+  let(:validator) { TopicTitleLengthValidator.new({attributes: :title}) }
+  subject(:validate) { validator.validate_each(record,:title,record.title) }
+
+  shared_examples "validating any topic title" do
+    it 'adds an error when topic title is greater than SiteSetting.max_topic_title_length' do
+      record.title = 'a' * (SiteSetting.max_topic_title_length + 1)
+      validate
+      expect(record.errors[:title]).to be_present
+    end
+  end
+
+  describe 'topic' do
+    let(:record) { Fabricate.build(:topic) }
+
+    it 'adds an error when topic title is shorter than SiteSetting.min_topic_title_length' do
+      record.title = 'a' * (SiteSetting.min_topic_title_length - 1)
+      validate
+      expect(record.errors[:title]).to be_present
+    end
+
+    it 'does not add an error when length is good' do
+      record.title = 'a' * (SiteSetting.min_topic_title_length)
+      validate
+      expect(record.errors[:title]).to_not be_present
+    end
+
+    include_examples "validating any topic title"
+  end
+
+  describe 'private message' do
+    before do
+      SiteSetting.stubs(:min_private_message_title_length).returns(3)
+    end
+
+    let(:record) { Fabricate.build(:private_message_topic) }
+
+    it 'adds an error when topic title is shorter than SiteSetting.min_private_message_title_length' do
+      record.title = 'a' * (SiteSetting.min_private_message_title_length - 1)
+      validate
+      expect(record.errors[:title]).to be_present
+    end
+
+    it 'does not add an error when topic title is shorter than SiteSetting.min_topic_title_length' do
+      SiteSetting.stubs(:min_topic_title_length).returns(15)
+      record.title = 'a' * (SiteSetting.min_private_message_title_length)
+      validate
+      expect(record.errors[:title]).to_not be_present
+    end
+    
+    include_examples "validating any topic title"
+  end
+
+end