Fix test

I also made it check the default buffer size from the OS, as the value
used wasn't enough to fill the buffer on my computer, so the test would
pass with or without the fix.

Author: jonleighton

lib/spring/test/acceptance_test.rb

@@ -124,6 +124,16 @@ def self.omg
         assert_failure app.spring_test_command, stdout: "RuntimeError: omg"
       end
 
+      test "app gets reloaded even with a ton of boot output" do
+        limit = UNIXSocket.pair.first.getsockopt(:SOCKET, :SNDBUF).int
+
+        assert_success app.spring_test_command
+        File.write(app.path("config/initializers/verbose.rb"), "#{limit}.times { puts 'x' }")
+
+        app.await_reload
+        assert_success app.spring_test_command
+      end
+
       test "app recovers when a boot-level error is introduced" do
         config = app.application_config.read
 
@@ -328,17 +338,6 @@ def exec_name
         expr = "p Kernel.private_instance_methods.include?(:raise)"
         assert_success %(bin/rails runner '#{expr}'), stdout: "true"
       end
-
-      test "app gets reloaded even with a ton of boot output" do
-        File.write(app.path("config/initializers/verbose.rb"), "50.times { puts 'x' * 80 }\n")
-        begin
-          app.env["RAILS_ENV"] = "test"
-          assert_success "bin/rails runner 'puts Spring.watcher.class'", stdout: "Polling"
-          assert_app_reloaded
-        ensure
-          File.unlink(app.path("config/initializers/verbose.rb"))
-        end
-      end
     end
   end
 end