overwrite config.cache_classes in app generator

Author: fxn

lib/spring/test/application_generator.rb

@@ -69,6 +69,11 @@ def generate_files
           append_to_file(application.gemfile, "gem 'sqlite3', '< 1.4'")
         end
 
+        rewrite_file(application.path("config/environments/test.rb")) do |c|
+          c.sub!(/config\.cache_classes\s*=\s*true/, "config.cache_classes = false")
+          c
+        end
+
         if application.path("bin").exist?
           FileUtils.cp_r(application.path("bin"), application.path("bin_original"))
         end