Add Codecov coverage reports

Gemfile

@@ -49,6 +49,8 @@ group :test do
   gem 'minitest'
   gem 'rr', require: false
   gem 'rack-test', require: false
+  gem 'simplecov', require: false
+  gem 'codecov', require: false
 end
 
 if ENV['SELENIUM'] == '1'

Gemfile.lock

@@ -13,6 +13,10 @@ GEM
       rack (>= 0.9.0)
     browser (2.6.1)
     chunky_png (1.3.11)
+    codecov (0.1.17)
+      json
+      simplecov
+      url
     coderay (1.1.2)
     coffee-script (2.4.1)
       coffee-script-source
@@ -20,6 +24,7 @@ GEM
     coffee-script-source (1.12.2)
     concurrent-ruby (1.1.5)
     daemons (1.3.1)
+    docile (1.3.2)
     erubi (1.9.0)
     ethon (0.12.0)
       ffi (>= 1.3.0)
@@ -45,6 +50,7 @@ GEM
       image_optim (~> 0.19)
     image_size (2.0.2)
     in_threads (1.5.3)
+    json (2.3.0)
     method_source (0.9.2)
     mini_portile2 (2.4.0)
     minitest (5.12.2)
@@ -80,6 +86,10 @@ GEM
     sass-listen (4.0.0)
       rb-fsevent (~> 0.9, >= 0.9.4)
       rb-inotify (~> 0.9, >= 0.9.7)
+    simplecov (0.18.5)
+      docile (~> 1.1)
+      simplecov-html (~> 0.11)
+    simplecov-html (0.12.2)
     sinatra (2.0.7)
       mustermann (~> 1.0)
       rack (~> 2.0)
@@ -128,6 +138,7 @@ GEM
     unicode-display_width (1.6.0)
     unicode_utils (1.4.0)
     unix_utils (0.0.15)
+    url (0.3.2)
     yajl-ruby (1.4.1)
 
 PLATFORMS
@@ -138,6 +149,7 @@ DEPENDENCIES
   better_errors
   browser
   chunky_png
+  codecov
   coffee-script
   erubi
   html-pipeline
@@ -155,6 +167,7 @@ DEPENDENCIES
   rake
   rr
   sass
+  simplecov
   sinatra
   sinatra-contrib
   sprockets

test/test_helper.rb

@@ -1,3 +1,9 @@
+require 'simplecov'
+SimpleCov.start
+
+require 'codecov'
+SimpleCov.formatter = SimpleCov::Formatter::Codecov
+
 ENV['RACK_ENV'] = 'test'
 
 require 'bundler/setup'