是否有设置的配置变量,或其他一些方式让Rails ActiveSupport::TestCase显示多个跟踪线？否则很难调试.
例:
ERROR test_something (0.73s)
SystemStackError: stack level too deep
/Users/mario/.rvm/gems/ruby-1.9.2-p290/gems/activerecord-3.0.9/lib/active_record/connection_adapters/abstract/database_statements.rb:153