# frozen_string_literal: true

RSpec::Matchers.define :match_stdout do |check|
  @capture = nil

  match do |block|
    begin
      stdout_saved = $stdout

      $stdout = StringIO.new

      block.call
    ensure
      @capture = $stdout

      $stdout = stdout_saved
    end

    @capture.string.match check
  end

  failure_message do
    "expected to #{description}"
  end

  failure_message_when_negated do
    "expected not to #{description}"
  end

  description do
    "match [#{check}] on stdout [#{@capture.string}]"
  end

  def supports_block_expectations?
    true
  end
end