Collect code coverage for rspec tests.

.gitignore

@@ -14,6 +14,8 @@
 
 config/database.yml
 
+/coverage
+
 # Ignore db for sqlite
 cobra
 cobra_test

Gemfile

@@ -36,6 +36,9 @@ group :development, :test do
   gem 'brakeman', '~> 5.2'
   gem 'bullet'
   gem 'pry'
+  gem 'simplecov'
+  gem 'simplecov-cobertura'
+  gem 'simplecov-html'
 end
 
 group :test do

Gemfile.lock

@@ -124,6 +124,7 @@ GEM
     database_cleaner-core (2.0.1)
     date (3.3.4)
     diff-lcs (1.5.1)
+    docile (1.4.1)
     drb (2.2.1)
     dry-cli (1.1.0)
     erubi (1.13.0)
@@ -361,6 +362,15 @@ GEM
     simple_form (5.3.1)
       actionpack (>= 5.2)
       activemodel (>= 5.2)
+    simplecov (0.22.0)
+      docile (~> 1.1)
+      simplecov-html (~> 0.11)
+      simplecov_json_formatter (~> 0.1)
+    simplecov-cobertura (2.1.0)
+      rexml
+      simplecov (~> 0.19)
+    simplecov-html (0.13.1)
+    simplecov_json_formatter (0.1.4)
     slim (5.2.1)
       temple (~> 0.10.0)
       tilt (>= 2.1.0)
@@ -455,6 +465,9 @@ DEPENDENCIES
   rubocop-rspec_rails
   sassc-rails
   simple_form
+  simplecov
+  simplecov-cobertura
+  simplecov-html
   slim-rails
   spring
   stackprof

spec/spec_helper.rb

@@ -1,5 +1,20 @@
 # frozen_string_literal: true
 
+require 'simplecov'
+require 'simplecov-cobertura'
+SimpleCov.coverage_dir 'coverage/spec'
+SimpleCov.enable_coverage :branch
+SimpleCov.formatter = SimpleCov::Formatter::CoberturaFormatter
+
+SimpleCov.start do
+  add_filter 'spec/'
+  add_filter 'test/'
+  add_group 'Controllers', 'app/controllers'
+  add_group 'Models', 'app/models'
+  add_group 'Resources', 'app/resources'
+  add_group 'Libraries', 'lib'
+end
+
 RSpec.configure do |config|
   config.expect_with :rspec do |expectations|
     expectations.include_chain_clauses_in_custom_matcher_descriptions = true