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module SpecHelpers
module Reporting
# Captures the given stream and returns it:
#
# stream = capture(:stdout) { puts 'notice' }
# stream # => "notice\n"
#
# stream = capture(:stderr) { warn 'error' }
# stream # => "error\n"
#
# even for subprocesses:
#
# stream = capture(:stdout) { system('echo notice') }
# stream # => "notice\n"
#
# stream = capture(:stderr) { system('echo error 1>&2') }
# stream # => "error\n"
def capture(stream)
captured_stream = Tempfile.new(stream.to_s)
stream_io = case stream
when :stdout
$stdout
when :stderr
$stderr
else
raise ArgumentError,
"Expected stream to be :stdout or :stderr, got #{stream.inspect}"
end
origin_stream = stream_io.dup
stream_io.reopen(captured_stream)
yield
stream_io.rewind
captured_stream.read
ensure
captured_stream.close
captured_stream.unlink
stream_io.reopen(origin_stream)
end
alias silence capture
end
end
RSpec.configure do |config|
config.include SpecHelpers::Reporting
end
|
