def if_mongrel(msg="Install mongrel to run this test", &block) do
  begin
    require 'rubygems'
    require 'mongrel'
  rescue
    pending(msg)
  end
  block.call
end

# Use with

it "should be neat" do
  if_mongrel do
    @mongrel.should be_kind_of(Mongrel)
  end
end