def test(nr, &block)
  begin
    (1..3).each do |i|
      puts("test #{nr}, Iteration #{i}: Vor block.call")
      block.call(i)
      puts("test #{nr}, Iteration #{i}: Nach block.call")
    end
    puts("test #{nr}, Nach loop")
  ensure
    puts("test #{nr}: In ensure")
  end
end

def test1
  test(1) { |i|
    break if(i == 2)
  }
  puts "test 1: end"
end

def test2
  test(2) { |i|
    return if(i == 2)
  }
  puts "test 2: end"
end

class LoopInterrupt < StandardError
end

def test3
  begin
    test(3) { |i|
      raise LoopInterrupt if(i == 2)
    }
  rescue LoopInterrupt => ex
    puts "test 3: rescue #{ex.message}"
  end
  puts "test 3: end"
end

(1..3).each { |i|
  eval("test#{i}")
}