From 1bd426d300ad80a1edd36e04013aaa51c52d3491 Mon Sep 17 00:00:00 2001
From: Justin Coyne <jcoyne@justincoyne.com>
Date: Tue, 12 Dec 2017 09:24:32 -0600
Subject: [PATCH] Don't calculate coverage on the generated test app

---
 spec/spec_helper.rb | 19 +++++++++++++++++--
 1 file changed, 17 insertions(+), 2 deletions(-)

diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index ca141c2..4b08f67 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -1,8 +1,23 @@
 # frozen_string_literal: true
 ENV['RAILS_ENV'] ||= 'test'
 
-require 'coveralls'
-Coveralls.wear!
+def coverage_needed?
+  ENV['COVERAGE'] || ENV['TRAVIS']
+end
+
+if coverage_needed?
+  require 'simplecov'
+  require 'coveralls'
+  SimpleCov.root(File.expand_path('../..', __FILE__))
+  SimpleCov.formatter = Coveralls::SimpleCov::Formatter
+  SimpleCov.start('rails') do
+    add_filter '/.internal_test_app'
+    add_filter '/lib/generators'
+    add_filter '/spec'
+  end
+  SimpleCov.command_name 'spec'
+end
+
 require 'engine_cart'
 EngineCart.load_application!