Adding test for formatter

I have added database cleaner as for formatter spec it was trying to
use inbuild transactional fixture flag, which was failing as it
couldn't find any transaction to rollback. Hence switched to using
database_cleaner gem for using truncation as strategy

spec/rails_helper.rb

@@ -5,6 +5,7 @@ require File.expand_path('../dummy/config/environment', __FILE__)
 abort("The Rails environment is running in production mode!") if Rails.env.production?
 require 'spec_helper'
 require 'rspec/rails'
+require 'database_cleaner'
 # Add additional requires below this line. Rails is not loaded until this point!
 
 # Requires supporting ruby files with custom matchers and macros, etc, in
@@ -33,7 +34,7 @@ RSpec.configure do |config|
   # If you're not using ActiveRecord, or you'd prefer not to run each of your
   # examples within a transaction, remove the following line or assign false
   # instead of true.
-  config.use_transactional_fixtures = true
+  config.use_transactional_fixtures = false
 
   # RSpec Rails can automatically mix in different behaviours to your tests
   # based on their file location, for example enabling you to call `get` and
@@ -49,4 +50,15 @@ RSpec.configure do |config|
   # The different available types are documented in the features, such as in
   # https://relishapp.com/rspec/rspec-rails/docs
   config.infer_spec_type_from_file_location!
+
+  config.before(:suite) do
+    DatabaseCleaner.strategy = :truncation
+    DatabaseCleaner.clean_with(:truncation)
+  end
+
+  config.around(:each) do |example|
+    DatabaseCleaner.cleaning do
+      example.run
+    end
+  end
 end