Only run listen tests in isolation, for now

There is a known issue with the listen tests that casuses files to be
incorrectly GC'ed even when they are still in-use. The current is to
only run them in isolation to avoid randomly failing our test suite.

2 files changed, 21 insertions, 1 deletions

diff --git a/activesupport/test/file_evented_update_checker_test.rb b/activesupport/test/file_evented_update_checker_test.rb
index 071449d399..ec3a7e28f3 100644
--- a/activesupport/test/file_evented_update_checker_test.rb
+++ b/activesupport/test/file_evented_update_checker_test.rb
@@ -5,6 +5,11 @@ require 'file_update_checker_shared_tests'
 class FileEventedUpdateCheckerTest < ActiveSupport::TestCase
   include FileUpdateCheckerSharedTests
 
+  def setup
+    skip if ENV['LISTEN'] == '0'
+    super
+  end
+
   def new_checker(files = [], dirs = {}, &block)
     ActiveSupport::FileEventedUpdateChecker.new(files, dirs, &block).tap do
       wait
diff --git a/ci/travis.rb b/ci/travis.rb
index 52fef05fbf..658d66c6b4 100755
--- a/ci/travis.rb
+++ b/ci/travis.rb
@@ -72,6 +72,10 @@ class Build
     key.join(':')
   end
 
+  def activesupport?
+    gem == 'activesupport'
+  end
+
   def activerecord?
     gem == 'activerecord'
   end
@@ -101,11 +105,22 @@ class Build
     tasks.each do |task|
       cmd = "bundle exec rake #{task}"
       puts "Running command: #{cmd}"
-      return false unless system(cmd)
+      return false unless system(env, cmd)
     end
     true
   end
 
+  def env
+    if activesupport? && !isolated?
+      # There is a known issue with the listen tests that casuses files to be
+      # incorrectly GC'ed even when they are still in-use. The current is to
+      # only run them in isolation to avoid randomly failing our test suite.
+      { 'LISTEN' => '0' }
+    else
+      {}
+    end
+  end
+
   def run_bug_report_templates
     Dir.glob('bug_report_templates/*.rb').all? do |file|
       system(Gem.ruby, '-w', file)