# File test/test_params.rb, line 1429
    def test_virtual_host
      assert_equal(nil, @entry.virtual_host)
      @entry.virtual_host = 'www.foo.net'
      assert_equal('www.foo.net', @attrs['virtual_host'])
      assert_equal('www.foo.net', @entry.virtual_host)
      @entry.virtual_host = nil # allowed
      assert_exception(RuntimeError) {
        @entry.virtual_host = 0        # not allowed
      }
    end