From: Pit Capitain <pit@...>
Date: 2006-01-01T03:49:18+09:00
Subject: Re: Where is my TestResult?

cgmjr schrieb:
> So I'm teaching myself Ruby.

Welcome!

>  I'm playing with Test::Unit.  I've progressed to:
> 
> class TC_venueCreate < Test::Unit::TestCase
> ....
>   def test_Nil
>       begin
> 	    assert_nil(@v)
>             rescue Test::Unit::AssertionFailedError
> 		   puts "Ha ha!  It ain't nil!"
> 		   ????TestResult.failures.each {|f| puts f.short_display }
> 		   raise
>   	 end
>   end
> ....
> end
> 
> Where is that TestResult?

Maybe the following code helps a little bit:


   require "test/unit"
   require "enumerator"

   # the code is in the form of a unit test, just like yours
   class TestResultSearch < Test::Unit::TestCase

     # returns all known instances of the given class
     def instances_of klass
       ObjectSpace.enum_for( :each_object, klass ).to_a
     end

     # returns all classes with the name "TestResult"
     def testresult_classes
       instances_of( Class ).select { |c| c.name =~ /\bTestResult$/ }
     end

     # this test succeeds, so there is exactly one class named
     # "TestResult", but see the next test
     def test_find_class
       assert_equal 1, testresult_classes.size
     end

     # this test doesn't succeed, so the TestResult class doesn't have a
     # method named "failures". Look at the error message to find the
     # full name of the TestResult class
     def test_access_to_failures_via_class
       testresult_class = testresult_classes[ 0 ]
       assert_respond_to testresult_class, :failures
     end

     # returns all instances of the TestResult class
     def testresult_instances
       instances_of Test::Unit::TestResult
     end

     # this test succeeds, so there seems to be exactly one instance of
     # the TestResult class
     def test_find_instance
       assert_equal 1, testresult_instances.size
     end

     # this test doesn't succeed, so the instances of the TestResult
     # class don't have a method named "failures", either. Look at the
     # error message to find the instance variables of the TestResult
     # instance
     def test_access_to_failures_via_instance
       testresult_instance = testresult_instances[ 0 ]
       assert_respond_to testresult_instance, :failures
     end

     # without reading the Test::Unit source code, the only way to get at
     # the current list of failures I found is to look for the one
     # instance of TestResult and to access its "@failures" instance
     # variable
     def test_access_to_failures_instance_variable
       testresult_instance = testresult_instances[ 0 ]
       failures = testresult_instance.instance_variable_get :@failures
       assert_not_nil failures
     end

   end


The question is: what do you want to do with the current list of failures?

Regards,
Pit