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require 'abstract_unit'

class BenchmarkableTest < ActiveSupport::TestCase
  include ActiveSupport::Benchmarkable

  attr_reader :buffer, :logger

  class Buffer
    include Enumerable

    def initialize; @lines = []; end
    def each(&block); @lines.each(&block); end
    def write(x); @lines << x; end
    def close; end
    def last; @lines.last; end
    def size; @lines.size; end
    def empty?; @lines.empty?; end
  end

  def setup
    @buffer = Buffer.new
    @logger = ActiveSupport::BufferedLogger.new(@buffer)
  end

  def test_without_block
    assert_raise(LocalJumpError) { benchmark }
    assert buffer.empty?
  end

  def test_defaults
    i_was_run = false
    benchmark { i_was_run = true }
    assert i_was_run
    assert_last_logged
  end

  def test_with_message
    i_was_run = false
    benchmark('test_run') { i_was_run = true }
    assert i_was_run
    assert_last_logged 'test_run'
  end

  def test_within_level
    logger.level = ActiveSupport::BufferedLogger::DEBUG
    benchmark('included_debug_run', :level => :debug) { }
    assert_last_logged 'included_debug_run'
  end

  def test_outside_level
    logger.level = ActiveSupport::BufferedLogger::ERROR
    benchmark('skipped_debug_run', :level => :debug) { }
    assert_no_match(/skipped_debug_run/, buffer.last)
  ensure
    logger.level = ActiveSupport::BufferedLogger::DEBUG
  end

  private
    def assert_last_logged(message = 'Benchmarking')
      assert_match(/^#{message} \(.*\)$/, buffer.last)
    end
end
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