Ruby Rspec：测试实例变量而不向源添加访问器
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Ruby Rspec : Testing instance variables without adding an accessor to source
提问by steve_gallagher
I'm trying to test the following method:
我正在尝试测试以下方法：
def unprocess_move(board, move)
if move[0].instance_of?(Array)
multi_move = @multi_move.pop(2).reverse
multi_move.each do |single_move|
unapply_move(board, single_move)
end
else
board = unapply_move(board, move)
end
board
end
where I want to set the state for @multi_move, but I don't want to add an accessor just for testing. Is there a way to do so without the accessor? Thanks.
我想为@multi_move 设置状态，但我不想添加仅用于测试的访问器。有没有办法在没有访问器的情况下做到这一点？谢谢。
回答by KL-7
You can use Object#instance_variable_getmethod to get value of any instance variable of the object like that:
您可以使用Object#instance_variable_get方法来获取对象的任何实例变量的值，如下所示：
class Foo
def initialize
@foo = 5 # no accessor for that variable
end
end
foo = Foo.new
puts foo.instance_variable_get(:@foo)
#=> 5
And Object#instance_variable_setcan be used to set instance variable values:
并且Object#instance_variable_set可用于设置实例变量值：
foo.instance_variable_set(:@foo, 12)
puts foo.instance_variable_get(:@foo)
#=> 12
