Merge pull request #841 from alphagov/monitor-coverage

Use SimpleCov to report coverage after tests

.gitignore

@@ -15,3 +15,4 @@
 /tmp
 
 .DS_Store
+/coverage

Gemfile

@@ -23,5 +23,6 @@ group :development, :test do
   gem "govuk_test"
   gem "pry-rails"
   gem "rspec-rails"
+  gem "simplecov"
   gem "webmock"
 end

Gemfile.lock

@@ -78,6 +78,7 @@ GEM
     crass (1.0.6)
     database_cleaner (1.8.5)
     diff-lcs (1.4.4)
+    docile (1.3.2)
     domain_name (0.5.20190701)
       unf (>= 0.0.5, < 1.0.0)
     elasticsearch (6.8.2)
@@ -305,6 +306,10 @@ GEM
       rubyzip (>= 1.2.2)
     sentry-raven (3.0.4)
       faraday (>= 1.0)
+    simplecov (0.19.0)
+      docile (~> 1.1)
+      simplecov-html (~> 0.11)
+    simplecov-html (0.12.3)
     slimmer (15.1.1)
       activesupport
       json
@@ -372,6 +377,7 @@ DEPENDENCIES
   rspec-rails
   rubocop-govuk
   sass-rails
+  simplecov
   slimmer
   uglifier
   webmock

spec/rails_helper.rb

@@ -1,5 +1,9 @@
 # This file is copied to spec/ when you run 'rails generate rspec:install'
 ENV["RAILS_ENV"] ||= "test"
+
+require "simplecov"
+SimpleCov.start "rails"
+
 require File.expand_path("../config/environment", __dir__)
 # Prevent database truncation if the environment is production
 abort("The Rails environment is running in production mode!") if Rails.env.production?