applies new string literal convention in railties/test

The current code base is not uniform. After some discussion,
we have chosen to go with double quotes by default.

1 files changed, 4 insertions, 4 deletions

diff --git a/railties/test/application/integration_test_case_test.rb b/railties/test/application/integration_test_case_test.rb
index 68e2de80c4..1118e5037a 100644
--- a/railties/test/application/integration_test_case_test.rb
+++ b/railties/test/application/integration_test_case_test.rb
@@ -1,4 +1,4 @@
-require 'isolation/abstract_unit'
+require "isolation/abstract_unit"
 
 module ApplicationTests
   class IntegrationTestCaseTest < ActiveSupport::TestCase
@@ -13,9 +13,9 @@ module ApplicationTests
     end
 
     test "resets Action Mailer test deliveries" do
-      script('generate mailer BaseMailer welcome')
+      script("generate mailer BaseMailer welcome")
 
-      app_file 'test/integration/mailer_integration_test.rb', <<-RUBY
+      app_file "test/integration/mailer_integration_test.rb", <<-RUBY
         require 'test_helper'
 
         class MailerIntegrationTest < ActionDispatch::IntegrationTest
@@ -55,7 +55,7 @@ module ApplicationTests
     end
 
     test "app method of integration tests returns test_app by default" do
-      app_file 'test/integration/default_app_test.rb', <<-RUBY
+      app_file "test/integration/default_app_test.rb", <<-RUBY
         require 'test_helper'
 
         class DefaultAppIntegrationTest < ActionDispatch::IntegrationTest