Accessing instance variables in rspec

Question

I don't have any code as this is just a hypothetical question, but how would you go about accessing and manipulating instance variables in rspec?

For instance if you had a @counter variable in your initialize method inside of a class, how could you write a test saying that if @counter is a certain number, then a certain method should return true. And if it equals a different number, then that method should return false.

B Seven · Accepted Answer · 2016-07-13 16:55:14Z

1

describe Foo do
  context 'When counter is even' do
    let( :foo ){ Foo.new(4) }

    specify '#even?' do
      expect( foo.even? ).to be_true
    end
  end
end

According to your question, @counter is set in the initialize method. So the #even? method would check @counter.

answered Jul 13, 2016 at 16:55

B Seven

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4 Comments

Harry B. Over a year ago

To clarify, the counter would not be set like that. A players name would be the argument in the initialize definition and the counter is automatically set to 0 when you initialize. After a player takes a turn, the counter increments by one each time

B Seven Over a year ago

It sounds like you want a #has_moved? method. So that method would check the @counter. The above test will work.

Harry B. Over a year ago

Okay cool. I'll try and mess around with some code. Thanks for your help!

B Seven Over a year ago

Writing specs is a great way to learn. And then you can post your app and spec code in questions on SO to get better help.

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