Fix bug STDOUT isn't captured

[pocke]

Problem

In my environment, rrrspec doesn't capture stdout in second and subsequent.

example

Focus on one slave.

First time

Second time

STDOUT is empty.

version

• RRRSpec 0.4.3

[sorah]

LGTM.

[sorah]

cc @cookpad/rrrspec

@pocke if possible please explain background and your analysis at here, too.

[pocke]

Analysis

First, I've debugged the problem by debug printing.

# In spec_helper
RSpec.configure |config|
  config.before do
    $stdout.puts "======================== StdOut Before Each ========================"
  end

  config.after do
    $stdout.puts "======================== StdOut After Each ========================"
  end
end

I added the above code, and run RRRSpec. Then RRRSpec captures StdOut Before Each and StdOut After Each but rspec's output is not captured.

So, I guess problem is in output_stream.

Second, I try outputting object_id of $stdout and RSpec.configuration.output_stream.
Then I've confirmed they are same object.

Cause (guess)

I guess this cause is difference between add_formatter and default_formatter.

• https://github.com/rspec/rspec-core/blob/master/lib/rspec/core/configuration.rb#L850-L852
• https://github.com/rspec/rspec-core/blob/master/lib/rspec/core/configuration.rb#L831-L834

In add_formatter, a formatter is received an output_stream. However, in default_formatter, a formatter is not received an output_stream.
It's a problem of output_stream, so, I guess the cause is the difference.