# Test/unit inconsistencies between 1.9 and 1.8 **URL:** \ **Category:** Ruby\ **Created:** [April 25, 2007, 9:29am UTC](https://www.ruby-forum.com/t/test-unit-inconsistencies-between-1-9-and-1-8/92879 "2007-04-25T09:29:46Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![adambeazley](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/5f9b8f/32.png) [@adambeazley](https://www.ruby-forum.com/u/adambeazley)\ **Post date:** [April 25, 2007, 9:29am UTC](https://www.ruby-forum.com/t/test-unit-inconsistencies-between-1-9-and-1-8/92879/1 "2007-04-25T09:29:46Z")
Hello, We’re having problems with ruby 1.9 and test/unit. It looks like when ObjectSpace is scanned that the methods we are defining aren’t being seen. Any suggestions? Thanks, -Adam % cat 19test.rb [~/code/planb/root] require ‘test/unit’ class Foo attr\_reader :attrs def initialize @attrs = Hash.new (“A”…“Z”).each { |x| @attrs[x] = x.downcase } end end tclass = Class.new( Test::Unit::TestCase ) Foo.const\_set “TestAttr” , tclass Foo.new.attrs.each\_pair do |key,value| tclass.class\_eval do define\_method(“test\_#{key}”) do assert\_equal(key,value.upcase) end end end % /usr/bin/ruby -v [~/code/planb/root] ruby 1.8.6 (2007-03-13 patchlevel 0) [i686-darwin8.9.1] % /usr/bin/ruby 19test.rb [~/code/planb/root] Loaded suite 19test Started … Finished in 0.002402 seconds. 26 tests, 26 assertions, 0 failures, 0 errors % /opt/bin/ruby -v [~/code/planb/root] ruby 1.9.0 (2007-04-24 patchlevel 0) [i686-darwin8.9.1] % /opt/bin/ruby 19test.rb [~/code/planb/root] Loaded suite 19test Started F Finished in 0.000685 seconds. 1. Failure: default\_test(Foo::TestAttr) [/opt/lib/ruby/1.9/test/unit/assertions.rb:48:in `raise' /opt/lib/ruby/1.9/test/unit/assertions.rb:48:in`block in assert\_block’ /opt/lib/ruby/1.9/test/unit/assertions.rb:495:in `_wrap_assertion' /opt/lib/ruby/1.9/test/unit/assertions.rb:11240:in`assert\_block’ /opt/lib/ruby/1.9/test/unit/assertions.rb:313:in `flunk' /opt/lib/ruby/1.9/test/unit/testcase.rb:107:in`default\_test’ /opt/lib/ruby/1.9/test/unit/testcase.rb:76:in `run' /opt/lib/ruby/1.9/test/unit/testsuite.rb:34:in`block in run’ /opt/lib/ruby/1.9/test/unit/testsuite.rb:33:in `each' /opt/lib/ruby/1.9/test/unit/testsuite.rb:33:in`run’ /opt/lib/ruby/1.9/test/unit/testsuite.rb:34:in `block in run' /opt/lib/ruby/1.9/test/unit/testsuite.rb:33:in`each’ /opt/lib/ruby/1.9/test/unit/testsuite.rb:33:in `run' /opt/lib/ruby/1.9/test/unit/ui/testrunnermediator.rb:46:in`run\_suite’ /opt/lib/ruby/1.9/test/unit/ui/console/testrunner.rb:67:in `start_mediator' /opt/lib/ruby/1.9/test/unit/ui/console/testrunner.rb:41:in`start’ /opt/lib/ruby/1.9/test/unit/ui/testrunnerutilities.rb:29:in `run' /opt/lib/ruby/1.9/test/unit/autorunner.rb:215:in`run’ /opt/lib/ruby/1.9/test/unit/autorunner.rb:12:in `run' /opt/lib/ruby/1.9/test/unit.rb:278:in`block in \’]: No tests were specified. 1 tests, 1 assertions, 1 failures, 0 errors ---
**Author:** ![adambeazley](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/5f9b8f/32.png) [@adambeazley](https://www.ruby-forum.com/u/adambeazley)\ **Post date:** [April 26, 2007, 8:57am UTC](https://www.ruby-forum.com/t/test-unit-inconsistencies-between-1-9-and-1-8/92879/2 "2007-04-26T08:57:10Z")
I located the problem, below is a small patch ( copy & paste from 1.8sources ). It appears that a block/proc with no arguments has arity -1. irb(main):001:0\> proc { }.arity =\> -1 irb(main):002:0\> proc {|| }.arity =\> -1 and that somebody forgot about that below. -Adam # Index: lib/test/unit/testcase.rb — lib/test/unit/testcase.rb (revision 12221) +++ lib/test/unit/testcase.rb (working copy) @@ -37,7 +37,9 @@ # Creates a new instance of the fixture for running the # test represented by test\_method\_name. def initialize(test\_method\_name) - ``` unless(respond_to?(test_method_name) && ``` method(test\_method\_name).arity == 0) - ``` unless(respond_to?(test_method_name) and ``` - ``` (method(test_method_name).arity == 0 || ``` - ``` method(test_method_name).arity == -1)) throw :invalid_test end @method_name = test_method_name ``` ---
**Author:** ![adambeazley](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/5f9b8f/32.png) [@adambeazley](https://www.ruby-forum.com/u/adambeazley)\ **Post date:** [April 26, 2007, 10:03am UTC](https://www.ruby-forum.com/t/test-unit-inconsistencies-between-1-9-and-1-8/92879/3 "2007-04-26T10:03:20Z")
On Apr 25, 2007, at 23:56 , Adam B. wrote: > I located the problem, below is a small patch ( copy & paste from > 1.8sources ). Awesome. Please post the patch to the ruby project on [rubyforge.org](http://rubyforge.org). thanks! ---
**Author:** ![adambeazley](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/5f9b8f/32.png) [@adambeazley](https://www.ruby-forum.com/u/adambeazley)\ **Post date:** [April 26, 2007, 11:57am UTC](https://www.ruby-forum.com/t/test-unit-inconsistencies-between-1-9-and-1-8/92879/4 "2007-04-26T11:57:35Z")
On 4/26/07, Mauricio F. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > RUBY\_RELEASE\_DATE # =\> “2007-02-07” > proc{}.arity # =\> 0 > proc{||}.arity # =\> 0 > Proc.new{}.arity # =\> 0 Strange, must be a regression. irb(main):001:0\> RUBY\_VERSION =\> “1.9.0” irb(main):002:0\> RUBY\_RELEASE\_DATE =\> “2007-04-26” irb(main):003:0\> proc{}.arity =\> -1 irb(main):004:0\> proc{||}.arity =\> -1 irb(main):005:0\> Proc.new{}.arity =\> -1 ---
**Author:** ![adambeazley](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/5f9b8f/32.png) [@adambeazley](https://www.ruby-forum.com/u/adambeazley)\ **Post date:** [April 26, 2007, 11:46am UTC](https://www.ruby-forum.com/t/test-unit-inconsistencies-between-1-9-and-1-8/92879/5 "2007-04-26T11:46:31Z")
On Thu, Apr 26, 2007 at 03:56:25PM +0900, Adam B. wrote: > and that somebody forgot about that below. > > -Adam > > # Index: lib/test/unit/testcase.rb > > — lib/test/unit/testcase.rb (revision 12221) > +++ lib/test/unit/testcase.rb (working copy) > […] ? AFAIK #arity was redefined in 1.9 to return 0 for Procs with no arguments. That patch was applied to 1.8 three years ago but it’s not supposed to be needed on 1.9, see [ruby-core:2829]. Also, RUBY\_VERSION # =\> “1.9.0” RUBY\_RELEASE\_DATE # =\> “2007-02-07” proc{}.arity # =\> 0 proc{||}.arity # =\> 0 Proc.new{}.arity # =\> 0 require ‘test/unit’ class TC \< Test::Unit::TestCase define\_method(“test\_foo”){ assert true } end # \>\> Loaded suite - # \>\> Started # \>\> . # \>\> Finished in 0.001363 seconds. # \>\> # \>\> 1 tests, 1 assertions, 0 failures, 0 errors I can’t see any recent reference to arity in the Changelog, and proc\_arity is identical to the one in my build: [http://svn.ruby-lang.org/cgi-bin/viewvc.cgi/trunk/proc.c?revision=12212&view=markup](http://svn.ruby-lang.org/cgi-bin/viewvc.cgi/trunk/proc.c?revision=12212&view=markup) Has this really changed in the last couple months? If so, there’s a bug, either in the Rdoc documentation or the code. ---
**Author:** ![adambeazley](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/5f9b8f/32.png) [@adambeazley](https://www.ruby-forum.com/u/adambeazley)\ **Post date:** [April 26, 2007, 12:29pm UTC](https://www.ruby-forum.com/t/test-unit-inconsistencies-between-1-9-and-1-8/92879/6 "2007-04-26T12:29:37Z")
On Thu, Apr 26, 2007 at 06:56:45PM +0900, Adam B. wrote: > =\> “1.9.0” > irb(main):002:0\> RUBY\_RELEASE\_DATE > =\> “2007-04-26” > irb(main):003:0\> proc{}.arity > =\> -1 > irb(main):004:0\> proc{||}.arity > =\> -1 > irb(main):005:0\> Proc.new{}.arity > =\> -1 Yes, I’ve traced it back to this: Wed Mar 21 20:05:07 2007 Koichi Sasada [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) - compile.c, parse.y, eval.c, intern.h, iseq.c, lex.c, node.h, proc.c, vm.c, vm\_macro.def, vm\_macro.def, yarvcore.c, yarvcore.h, debug.c, debug.h: merge half-baked-1.9 changes. The biggest change is to change node structure around NODE\_SCOPE, NODE\_ARGS. Every scope (method/class/block) has own NODE\_SCOPE node and NODE\_ARGS represents more details of arguments information. I’ll write a document about detail of node structure. I’ve sent a bug report to ruby-core.