From: Dan Bikle <dan.bikle@...>
Date: 2005-11-14T15:11:19+09:00
Subject: Re: [rails] attaching the debugger to functional test.

People,

I got a good tip from the yahoo ba-rb group on this subject.

The tip is to...
'Ignore the error and just press c to continue'

the tip worked for me.

-Dan


On 10/30/05, Dan Bikle <dan.bikle@gmail.com> wrote:
> People,
>
> I'm trying to run the ruby debugger against a Test::Unit::TestCase class
> which is a parent of a Rails class.
>
> I started my study with a simple script:
>
> #
> # bikle_test.rb
> #
> require 'test/unit'
>
> class BikleTest < Test::Unit::TestCase
>   def setup
>     @string10 = "hello"
>   end
>   def test10
>     assert_equal @string10, "hello"
>   end
> end
>
>
> The following command line works great:
>
> ruby -r debug bikle_test.rb
>
>
> Next, I create a new rails application with this command line:
>
> rails rtest
>
> Then, I create a database.yml:
>
> test:
>   adapter: sqlite3
>   dbfile: db/rtest.db
>
> Then I copied bikle_test.rb to...
>
> rtest/test/functional/
>
> I altered it a bit so it behaves like a typical Rails test:
>
>
> #
> # bikle_test.rb
> #
> require File.dirname(__FILE__) + '/../test_helper'
>
> class BikleTest < Test::Unit::TestCase
>   def setup
>     @string10 = "hello"
>   end
>   def test10
>     assert_equal @string10, "hello"
>   end
> end
>
>
> When I run it, I see this:
>
> zmac11:/cd/railsdemos/rtest/test/functional oracle$
> zmac11:/cd/railsdemos/rtest/test/functional oracle$
> zmac11:/cd/railsdemos/rtest/test/functional oracle$
> zmac11:/cd/railsdemos/rtest/test/functional oracle$
> zmac11:/cd/railsdemos/rtest/test/functional oracle$ ls
> ./              ../             bikle_test.rb
> zmac11:/cd/railsdemos/rtest/test/functional oracle$ ruby b*
> Loaded suite bikle_test
> Started
> .
> Finished in 0.131351 seconds.
>
> 1 tests, 1 assertions, 0 failures, 0 errors
> zmac11:/cd/railsdemos/rtest/test/functional oracle$
> zmac11:/cd/railsdemos/rtest/test/functional oracle$
> zmac11:/cd/railsdemos/rtest/test/functional oracle$
> zmac11:/cd/railsdemos/rtest/test/functional oracle$
> zmac11:/cd/railsdemos/rtest/test/functional oracle$
>
>
> When I try to run it in the debugger I see this:
>
>
> zmac11:/cd/railsdemos/rtest/test/functional oracle$
> zmac11:/cd/railsdemos/rtest/test/functional oracle$
> zmac11:/cd/railsdemos/rtest/test/functional oracle$
> zmac11:/cd/railsdemos/rtest/test/functional oracle$
> zmac11:/cd/railsdemos/rtest/test/functional oracle$
> zmac11:/cd/railsdemos/rtest/test/functional oracle$ ruby -r debug b*
> Debug.rb
> Emacs support available.
>
> bikle_test.rb:1:
> (rdb:1) l
> [-4, 5] in bikle_test.rb
> => 1  require File.dirname(__FILE__) + '/../test_helper'
>    2
>    3  class BikleTest < Test::Unit::TestCase
>    4    def setup
>    5      @string10 = "hello"
>    6    end
>    7    def test10
>    8      assert_equal @string10, "hello"
>    9    end
>    10  end
>    11
>    12
> (rdb:1) b 5
> Set breakpoint 1 at bikle_test.rb:5
> (rdb:1) c
> /opt/local/lib/ruby/1.8/drb/drb.rb:1572: `DRb::DRbServerNotFound'
> (DRb::DRbServerNotFound)
>         from /opt/local/lib/ruby/vendor_ruby/1.8/rubygems/custom_require.rb:21:in
> `require'
>         from /opt/local/lib/ruby/gems/1.8/gems/activesupport-1.2.1/lib/active_support/dependencies.rb:213:in
> `require'
>         from /opt/local/lib/ruby/vendor_ruby/1.8/rubygems.rb:182:in `activate'
>         from /opt/local/lib/ruby/vendor_ruby/1.8/rubygems.rb:181:in `each'
>         from /opt/local/lib/ruby/vendor_ruby/1.8/rubygems.rb:181:in `activate'
>         from /opt/local/lib/ruby/vendor_ruby/1.8/rubygems.rb:167:in `activate'
>         from /opt/local/lib/ruby/vendor_ruby/1.8/rubygems.rb:166:in `each'
>         from /opt/local/lib/ruby/vendor_ruby/1.8/rubygems.rb:166:in `activate'
>         from /opt/local/lib/ruby/vendor_ruby/1.8/rubygems/custom_require.rb:26:in
> `require'
>         from /Users/oracle/CD/railsdemos/rtest/config/boot.rb:14
>         from /Users/oracle/CD/railsdemos/rtest/config/environment.rb:8:in `require'
>         from /Users/oracle/CD/railsdemos/rtest/config/environment.rb:8
>         from ./../test_helper.rb:2:in `require'
>         from ./../test_helper.rb:2
>         from bikle_test.rb:1:in `require'
>         from bikle_test.rb:1
> /opt/local/lib/ruby/1.8/drb/drb.rb:1572:
> (rdb:1) q
> Really quit? (y/n) y
> zmac11:/cd/railsdemos/rtest/test/functional oracle$
> zmac11:/cd/railsdemos/rtest/test/functional oracle$
> zmac11:/cd/railsdemos/rtest/test/functional oracle$
> zmac11:/cd/railsdemos/rtest/test/functional oracle$
> zmac11:/cd/railsdemos/rtest/test/functional oracle$
>
>
> So, it's telling me that it is looking for a DRb Server.
>
> Question 1:
> Why does it need to talk with a DRb Server?
>
> Outside of Rails... it does not  need to talk with a DRb Server.
>
> Question 2:
> How do I start a DRb Server which would make the debugger happy?
>
> I looked in the DT-PickAxe book and found this:
>
> # Sample code from Programing Ruby, page 399
> require 'drb'
>
> class TestServer
>   def add(*args)
>     args.inject {|n,v| n + v}
>   end
> end
>
> server = TestServer.new
> DRb.start_service('druby://localhost:9000', server)
> DRb.thread.join   # Don't exit just yet!
>
>
> So, it looks like I give the server a port to listen on
> which would be easy enough.
>
> But, how do I then tell the debugger what that port is?
>
> Can any of you offer any insight, solutions, or ideas to experiment with?
>
> Thanks,
>
> -Dan
>