Ruby-on-rails 运行 rspec 时如何将 Rails.logger 打印到控制台/标准输出？

How to get Rails.logger printing to the console/stdout when running rspec?

提问by s12chung

Same as title: How to get Rails.loggerprinting to the console/stdout when running rspec? Eg.

与标题相同：如何Rails.logger在运行 rspec 时打印到控制台/标准输出？例如。

Rails.logger.info "I WANT this to go to console/stdout when rspec is running"
puts "Like how the puts function works"

I still want Rails.loggerto go to log/test.logtoo.

我还是希望Rails.logger去log/test.log了。

采纳答案by Phil Calvin

For Rails 4, see this answer.

对于 Rails 4，请参阅此答案。

For Rails 3.x, configure a logger in config/environments/test.rb:

对于 Rails 3.x，在 中配置记录器config/environments/test.rb：

config.logger = Logger.new(STDOUT)
config.logger.level = Logger::ERROR

This will interleave any errors that are logged during testing to STDOUT. You may wish to route the output to STDERR or use a different log level instead.

这会将测试期间记录的任何错误交错到 STDOUT。您可能希望将输出路由到 STDERR 或使用不同的日志级别。

Sending these messages to both the console and a log file requires something more robust than Ruby's built-in Loggerclass. The logginggem will do what you want. Add it to your Gemfile, then set up two appenders in config/environments/test.rb:

将这些消息同时发送到控制台和日志文件需要比 Ruby 的内置Logger类更健壮的东西。该记录的宝石会做你想要什么。将它添加到您的Gemfile，然后在 中设置两个附加程序config/environments/test.rb：

logger = Logging.logger['test']
logger.add_appenders(
    Logging.appenders.stdout,
    Logging.appenders.file('example.log')
)
logger.level = :info
config.logger = logger

回答by Thomas B Homburg

For Rails 4.x the log level is configured a bit different than in Rails 3.x

对于 Rails 4.x，日志级别的配置与 Rails 3.x 略有不同

Add this to config/environment/test.rb

将此添加到 config/environment/test.rb

# Enable stdout logger
config.logger = Logger.new(STDOUT)

# Set log level
config.log_level = :ERROR

The logger level is set on the logger instance from config.log_levelat: https://github.com/rails/rails/blob/v4.2.4/railties/lib/rails/application/bootstrap.rb#L70

记录器级别在记录器实例config.log_level上设置：https: //github.com/rails/rails/blob/v4.2.4/railties/lib/rails/application/bootstrap.rb#L70

Environment variable

环境变量

As a bonus, you can allow overwriting the log level using an environment variable with a default value like so:

作为奖励，您可以允许使用具有默认值的环境变量覆盖日志级别，如下所示：

# default :ERROR
config.log_level = ENV.fetch("LOG_LEVEL", "ERROR")

And then running tests from shell:

然后从 shell 运行测试：

# Log level :INFO (the value is uppercased in bootstrap.rb)
$ LOG_LEVEL=info rake test

# Log level :ERROR
$ rake test

回答by Jared Beck

Tail the log as a background job(&) and it will interleave with rspec output.

将日志作为后台作业(&) 拖尾，它将与 rspec 输出交错。

tail -f log/test.log &
bundle exec rspec

回答by Shyam Habarakada

A solution that I like, because it keeps rspec output separate from actual rails log output, is to do the following:

我喜欢的一个解决方案是执行以下操作，因为它将 rspec 输出与实际的 rails 日志输出分开：

• Open a second terminal window or tab, and arrange it so that you can see both the main terminal you're running rspec on as well as the new one.
• Run a tail command in the second window so you see the rails log in the test environment. By default this can be like $ tail -f $RAILS_APP_DIR/logs/test.logor tail -f $RAILS_APP_DIR\logs\test.logfor Window users
• Run your rspec suites

• 打开第二个终端窗口或选项卡，并对其进行排列，以便您可以看到正在运行 rspec 的主终端和新终端。
• 在第二个窗口中运行 tail 命令，以便您在测试环境中看到 rails 日志。默认情况下，这可以像$ tail -f $RAILS_APP_DIR/logs/test.log或tail -f $RAILS_APP_DIR\logs\test.log适用于 Window 用户
• 运行你的 rspec 套件

If you are running a multi-pane terminal like iTerm, this becomes even more fun and you have rspecand the test.logoutput side by side.

如果你正在运行像的iTerm多窗格终端，这变得更加有趣，你有rspec和test.log并排输出侧。

回答by manglewood

You can define a method in spec_helper.rb that sends a message both to Rails.logger.info and to puts and use that for debugging:

您可以在 spec_helper.rb 中定义一个方法，该方法将消息发送到 Rails.logger.info 并放置并使用它进行调试：

def log_test(message)
    Rails.logger.info(message)
    puts message
end