所需文件
- minitest
- active_support/testing/tagged_logging
- active_support/testing/setup_and_teardown
- active_support/testing/tests_without_assertions
- active_support/testing/assertions
- active_support/testing/error_reporter_assertions
- active_support/testing/deprecation
- active_support/testing/declarative
- active_support/testing/isolation
- active_support/testing/constant_lookup
- active_support/testing/time_helpers
- active_support/testing/constant_stubbing
- active_support/testing/file_fixtures
- active_support/testing/parallelization
- active_support/testing/parallelize_executor
- concurrent/utility/processor_counter
命名空间