Update codeclimate test reporter

.travis.yml

@@ -5,6 +5,8 @@ cache: bundler
 bundler_args: --without console
 script:
   - bundle exec rake spec
+after_success:
+  - '[ -d coverage ] && bundle exec codeclimate-test-reporter'
 rvm:
   - 2.0
   - 2.1
@@ -17,6 +19,7 @@ rvm:
 env:
   global:
     - JRUBY_OPTS='--dev -J-Xmx1024M'
+    - COVERAGE='true'
 matrix:
   allow_failures:
     - rvm: ruby-head

Gemfile

@@ -3,7 +3,10 @@ source 'https://rubygems.org'
 gemspec
 
 group :test do
-  gem 'codeclimate-test-reporter', platform: :rbx, require: false
+  platforms :mri do
+    gem 'codeclimate-test-reporter', require: false
+    gem 'simplecov', require: false
+  end
 end
 
 group :tools do

spec/spec_helper.rb

@@ -1,3 +1,11 @@
+if ENV['COVERAGE'] == 'true' && RUBY_ENGINE == 'ruby' && RUBY_VERSION == '2.3.1'
+  require 'simplecov'
+
+  SimpleCov.start do
+    add_filter '/spec/'
+  end
+end
+
 # See http://rubydoc.info/gems/rspec-core/RSpec/Core/Configuration
 RSpec.configure do |config|
   config.expect_with :rspec do |expectations|
@@ -76,11 +84,6 @@
   Kernel.srand config.seed
 end
 
-if RUBY_ENGINE == 'rbx'
-  require 'codeclimate-test-reporter'
-  CodeClimate::TestReporter.start
-end
-
 require 'dry/container'
 require 'dry/container/stub'