Module: WIP::Runner::Spec::Helpers::Matchers::ShowMatcher::Capturer

Defined in:
lib/wip/runner/spec/helpers/matchers.rb

Class Method Summary collapse

Class Method Details

.capture(ui, stream, block) ⇒ Object 



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# File 'lib/wip/runner/spec/helpers/matchers.rb', line 51

def self.capture(ui, stream, block)
  captured = StringIO.new

  mappings = {}.tap do |h|
    if stream == :combined
      out = ui.send(:out)
      err = ui.send(:err)
      h[out] = out.instance_variable_get(:'@output')
      h[err] = err.instance_variable_get(:'@output')
    else
      io = ui.send(stream)
      h[io] = io.instance_variable_get(:'@output')
    end
  end

  mappings.each do |io, original|
    io.instance_variable_set(:'@output', captured)
  end

  block.call
  captured.string
ensure
  mappings.each do |io, original|
    io.instance_variable_set(:'@output', original)
  end
end