从Method Ruby中选择Random Hash

时间:2017-01-18 12:21:22

标签: arrays ruby cucumber capybara

我可能会带着这个去一点点。

我正在使用Cucumber Capybara和Ruby,我想创建一些特定数据的哈希值,然后让我的测试随机选择其中一个哈希值。可以这样做吗?

我的方法包含哈希:

def random_vehicles


a1 = {:vrm => 'A1',
      :id => '11111111111',
      :post_code => 'AA11AA'
  }

b1 = {:vrm => 'B1',
      :id => '22222222222',
      :post_code => 'BB11BB'
  }

end

如何在该方法中随机选择两个哈希值中的一个?如:

sample = random_vehicles.sample   # This doesn't work

由于

2 个答案:

答案 0 :(得分:3)

尝试

def random_vehicles
  a1 = {:vrm => 'A1',
      :id => '11111111111',
      :post_code => 'AA11AA'
  }

  b1 = {:vrm => 'B1',
      :id => '22222222222',
      :post_code => 'BB11BB'
  }

  [a1, b1]
end

vehicles = random_vehicles
p vehicles.sample

答案 1 :(得分:2)

以下是如何修改方法以使您的初始random_vehicles.sample正常工作:

def random_vehicles
  [
    {:vrm => 'A1',
      :id => '11111111111',
      :post_code => 'AA11AA'
    },
    {:vrm => 'B1',
      :id => '22222222222',
      :post_code => 'BB11BB'
    }
  ]
end

random_vehicles.sample
#=> {:vrm=>"B1", :id=>"22222222222", :post_code=>"BB11BB"}
random_vehicles.sample
#=> {:vrm=>"A1", :id=>"11111111111", :post_code=>"AA11AA"}

请注意,方法名称很重要:它取决于您实际希望方法返回的内容。在这种情况下,方法名称是sample_vehicles(复数),所以它感觉很自然,它返回一个对象集合。

如果您需要它已经返回车辆,那么您应该更改方法并重命名:

def random_vehicle
  [
    {:vrm => 'A1',
      :id => '11111111111',
      :post_code => 'AA11AA'
    },
    {:vrm => 'B1',
      :id => '22222222222',
      :post_code => 'BB11BB'
    }
  ].sample
end

random_vehicle
#=> {:vrm=>"B1", :id=>"22222222222", :post_code=>"BB11BB"}
random_vehicle
#=> {:vrm=>"B1", :id=>"22222222222", :post_code=>"BB11BB"}
random_vehicle
#=> {:vrm=>"A1", :id=>"11111111111", :post_code=>"AA11AA"}