rspec users - Apr 2011 - before(:each) <- need some clarification

i am setting up a few objects that are interrelated for use in an rspec
test..

something like:

describe Dimension do

before(:each) do
 text = "string here"
end

it "should puts string" do
 puts text
end

end

when i run this, i get an error: undefined local variable or method
`text''

am doing something wrong?

thanks!

-- 
Posted via http://www.ruby-forum.com/.

On Apr 27, 2011, at 3:55 PM, Sergio Ruiz wrote:
> i am setting up a few objects that are interrelated for use in an rspec
> test..
> 
> something like:
> 
> describe Dimension do
> 
> before(:each) do
> text = "string here"
> end
> 
> it "should puts string" do
> puts text
> end
> 
> end
> 
> when i run this, i get an error: undefined local variable or method
> `text''
> 
> am doing something wrong?
text is a local variable, not an instance variable, and is not exposed outside
the scope of the block in which it is defined. It works with an instance
variable:

describe Dimension do

  before(:each) do
    @text = "string here"
  end

  it "should puts string" do
    puts @text
  end

end

Make sense?

Cheers,
David

Sergio,

I believe you need to make text an instance variable:

    @text = "string here"

Or you could use a let block:

    let(:text) do
      "string "here"
    end

Then you could continue to reference the text variable as you do now.

Jon Homan


On Wed, Apr 27, 2011 at 2:55 PM, Sergio Ruiz <lists at ruby-forum.com>
wrote:
> i am setting up a few objects that are interrelated for use in an rspec
> test..
>
> something like:
>
> describe Dimension do
>
> before(:each) do
>  text = "string here"
> end
>
> it "should puts string" do
>  puts text
> end
>
> end
>
> when i run this, i get an error: undefined local variable or method
> `text''
>
> am doing something wrong?
>
> thanks!
>
> --
> Posted via http://www.ruby-forum.com/.
> _______________________________________________
> rspec-users mailing list
> rspec-users at rubyforge.org
> http://rubyforge.org/mailman/listinfo/rspec-users
>
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Your variable "text" doesn''t exist outside the before(:each)
loop. Replacing
text with @text should fix your problem.

-- Bouke

2011/4/27 Sergio Ruiz <lists at ruby-forum.com>
> i am setting up a few objects that are interrelated for use in an rspec
> test..
>
> something like:
>
> describe Dimension do
>
> before(:each) do
>  text = "string here"
> end
>
> it "should puts string" do
>  puts text
> end
>
> end
>
> when i run this, i get an error: undefined local variable or method
> `text''
>
> am doing something wrong?
>
> thanks!
>
> --
> Posted via http://www.ruby-forum.com/.
> _______________________________________________
> rspec-users mailing list
> rspec-users at rubyforge.org
> http://rubyforge.org/mailman/listinfo/rspec-users
>
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On 28/04/11 1:25 AM, Sergio Ruiz wrote:
> i am setting up a few objects that are interrelated for use in an rspec
> test..
>
> something like:
>
> describe Dimension do
>
> before(:each) do
>   text = "string here"
> end
>
> it "should puts string" do
>   puts text
> end
>
> end
>
> when i run this, i get an error: undefined local variable or method
> `text''
>
> am doing something wrong?
>
> thanks!
>
Sergio,

You''ll want to create text as an instance variable
(''@text'').

The other option is to use ''let'' as in:

    let (:text) { "string here" }

Either option will get you what you want.


Thanks,

Srushti

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On Wed, Apr 27, 2011 at 2:55 PM, Sergio Ruiz <lists at ruby-forum.com>
wrote:
> i am setting up a few objects that are interrelated for use in an rspec
> test..
>
> something like:
>
> describe Dimension do
>
> before(:each) do
>  text = "string here"
> end
>
> it "should puts string" do
>  puts text
> end
>
> end
>
> when i run this, i get an error: undefined local variable or method
> `text''
>
> am doing something wrong?
>
Yeah, you have to use a class variable:

before(:each) do
  @text = "string here"
end

it "should puts string" do
 puts @text
end


>
> thanks!
>
> --
> Posted via http://www.ruby-forum.com/.
> _______________________________________________
> rspec-users mailing list
> rspec-users at rubyforge.org
> http://rubyforge.org/mailman/listinfo/rspec-users
>
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Hi,

On 27 Apr 2011, at 20:55, Sergio Ruiz wrote:
> i am setting up a few objects that are interrelated for use in an rspec
> test..
> 
> something like:
> 
> describe Dimension do
> 
> before(:each) do
> text = "string here"
This defines a local variable ''text'' which lives for the
duration of the before block. It can''t be seen by the #it block
(example) below, because it''s gone out of scope.
> end
> 
> it "should puts string" do
> puts text
> end
> 
> end
> 
> when i run this, i get an error: undefined local variable or method
> `text''
> 
> am doing something wrong?
> 
> thanks!
What people don''t realise is that #describe just creates an instance of
a class, called ExampleGroup. Think of the ''before'' block and
the ''it'' blocks as methods on that class. If you defined a
private variable in one method on a class, you wouldn''t expect to be
able to see it from another one, would you?

Here''s what we used to do in this kind of situation:

    describe Dimension do
      before(:each) do
        @text = "string here"
      end

      it "should puts string" do
        puts @text
      end
    end

Because, as I expect you know, instance variables *can* be seen between methods
on a class. However, some people found the instance variables noisy, or wanted
to lazy initialise them, so started doing this:

    describe Dimension do
      def text
        @text ||= "string here"
      end

      it "should puts string" do
        puts text
      end
    end

As I said, #describe just creates a class, so you can define methods on that
class if you like. Now our puts statement is calling the #text method that
we''ve defined.

This is such a common pattern, that in RSpec 2, David introduced #let blocks,
which let you refactor the above code to look like this:

    describe Dimension do
      let(:text) { "string here" }

      it "should puts string" do
        puts text
      end
    end

Make sense?

cheers,
Matt

--
Freelance programmer & coach
Founder, http://relishapp.com
+44(0)7974430184 | http://twitter.com/mattwynne

Wow! I guess this thread beated the record for simultaneous answers! :D

Best regards!

Rodrigo.

Em 27-04-2011 16:55, Sergio Ruiz escreveu:
> i am setting up a few objects that are interrelated for use in an rspec
> test..
>
> something like:
>
> describe Dimension do
>
> before(:each) do
>   text = "string here"
> end
>
> it "should puts string" do
>   puts text
> end
>
> end
>
> when i run this, i get an error: undefined local variable or method
> `text''
>
> am doing something wrong?
>
> thanks!
>

wow! thanks so much for the great info!

this is exactly what i needed!

thanks again!

-- 
Posted via http://www.ruby-forum.com/.

On Apr 27, 2011, at 3:55 PM, Sergio Ruiz wrote:
> i am setting up a few objects that are interrelated for use in an rspec
> test..
> 
> something like:
> 
> describe Dimension do
> 
> before(:each) do
> text = "string here"
> end
> 
> it "should puts string" do
> puts text
> end
> 
> end
> 
> when i run this, i get an error: undefined local variable or method
> `text''
> 
> am doing something wrong?
> 
> thanks!
You just need to make it an instance variable instead of a local variable.
Try @text instead of text.