自从我安装了 gon，我的 rake 任务不再工作了。
我在用着：
Rails 3.2.22.2
ruby 2.2.0p0
gon-6.0.1
test-unit-3.0.8
我无法卸载测试单元，因为：
$ rails c
/Users/me/.rbenv/versions/2.2.0/gemsets/project-gems/gems/activesupport-3.2.22.2/lib/active_support/dependencies.rb:251:in `require': Please add test-unit gem to your Gemfile: `gem 'test-unit', '~> 3.0'` (cannot load such file -- test/unit/testcase) (LoadError)
rake -T例如，如果我：
rake about # List versions of all Rails frameworks and the environment
... (all rake tasks here) ...
rake tmp:create # Creates tmp directories for sessions, cache, sockets, and pids
invalid option: -T
Test::Unit automatic runner.
Usage: /Users/me/.rbenv/versions/2.2.0/gemsets/project-gems/bin/rake [options] [-- untouched arguments]
-r, --runner=RUNNER Use the given RUNNER.
(c[onsole], e[macs], x[ml])
--collector=COLLECTOR Use the given COLLECTOR.
(de[scendant], di[r], l[oad], o[bject]_space)
-n, --name=NAME Runs tests matching NAME.
Use '/PATTERN/' for NAME to use regular expression.
--ignore-name=NAME Ignores tests matching NAME.
Use '/PATTERN/' for NAME to use regular expression.
-t, --testcase=TESTCASE Runs tests in TestCases matching TESTCASE.
Use '/PATTERN/' for TESTCASE to use regular expression.
--ignore-testcase=TESTCASE Ignores tests in TestCases matching TESTCASE.
Use '/PATTERN/' for TESTCASE to use regular expression.
--location=LOCATION Runs tests that defined in LOCATION.
LOCATION is one of PATH:LINE, PATH or LINE
--attribute=EXPRESSION Runs tests that matches EXPRESSION.
EXPRESSION is evaluated as Ruby's expression.
Test attribute name can be used with no receiver in EXPRESSION.
EXPRESSION examples:
!slow
tag == 'important' and !slow
--[no-]priority-mode Runs some tests based on their priority.
--default-priority=PRIORITY Uses PRIORITY as default priority
(h[igh], i[mportant], l[ow], m[ust], ne[ver], no[rmal])
-I, --load-path=DIR[:DIR...] Appends directory list to $LOAD_PATH.
--color-scheme=SCHEME Use SCHEME as color scheme.
(d[efault])
--config=FILE Use YAML fomat FILE content as configuration file.
--order=ORDER Run tests in a test case in ORDER order.
(a[lphabetic], d[efined], r[andom])
--max-diff-target-string-size=SIZE
Shows diff if both expected result string size and actual result string size are less than or equal SIZE in bytes.
(1000)
-v, --verbose=[LEVEL] Set the output level (default is verbose).
(important-only, n[ormal], p[rogress], s[ilent], v[erbose])
--[no-]use-color=[auto] Uses color output
(default is auto)
--progress-row-max=MAX Uses MAX as max terminal width for progress mark
(default is auto)
--no-show-detail-immediately Shows not passed test details immediately.
(default is yes)
--output-file-descriptor=FD Outputs to file descriptor FD
-- Stop processing options so that the
remaining options will be passed to the
test.
-h, --help Display this help.
Deprecated options:
--console Console runner (use --runner).
这是罪魁祸首：
invalid option: -T
Test::Unit automatic runner.
有无rspec，同样的错误。
当前解决方案：我以 application.rb 底部的这些行结束：
Test::Unit::AutoRunner.need_auto_run = false if defined?(Test::Unit::AutoRunner)
Test::Unit.run = true if defined?(Test::Unit) && Test::Unit.respond_to?(:run=)
有人有更好的主意吗？
谢谢！