Rails - Nov 2007 - Resetting fixtures for each iteration within a single test

Hi,

I want to reset the fixture data manually during a single test. I know
this action is performed between tests, but I need to trigger it
within a single test.

I need this because I have a directory full of test data (xml files)
which need to be sent to the application and validated for their
response. These files are all sent to a single controller action,
which dispatches the request to the appropriate Restful controller/
action. This controller mainly exists for backward compatibility
reasons which do not map to Restful controllers.
I already have tests on the Restful controller actions, but I want to
run this dispatching test as well. So what I do now is create a single
test which iterates over all these files and after each run reset! the
session for the next run.

class DispatcherControllerTest < Test::Unit::TestCase

  def test_all_xml_files
    all_files.each do |file|
      post :submit, file
      ...assertions...
      reset!
    end
  end

end

The problem is that the submitted files change the state of the
application. I don''t want the tests to be dependent of each other so I
want to reset the fixture data after each iteration, but I can''t find
the method to do this.

Does anybody know how to reset the fixtures manually during a single
test?

Thanks in advance,
Bas van Westing


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On 14 Nov 2007, at 20:56, Bas van Westing wrote:
>
> Hi,
>
> I want to reset the fixture data manually during a single test. I know
> this action is performed between tests, but I need to trigger it
> within a single test.
>
> The problem is that the submitted files change the state of the
> application. I don''t want the tests to be dependent of each other
so I
> want to reset the fixture data after each iteration, but I can''t
find
> the method to do this.
>
> Does anybody know how to reset the fixtures manually during a single
> test?

You need to rollback the current database transaction and start a new  
one.
An alternative method would be to dynamically generate a testcase for  
each data file you have.

Fred

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Hi Fred,

Thanks for your response. Can you also give me the statement which
rolls back the current database transaction?

Regards, Bas

On Nov 14, 10:33 pm, Frederick Cheung
<frederick.che...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:
> On 14 Nov 2007, at 20:56, Bas van Westing wrote:
>
>
>
> > Hi,
>
> > I want to reset the fixture data manually during a single test. I know
> > this action is performed between tests, but I need to trigger it
> > within a single test.
>
> > The problem is that the submitted files change the state of the
> > application. I don''t want the tests to be dependent of each
other so I
> > want to reset the fixture data after each iteration, but I
can''t find
> > the method to do this.
>
> > Does anybody know how to reset the fixtures manually during a single
> > test?
>
> You need to rollback the current database transaction and start a new
> one.
> An alternative method would be to dynamically generate a testcase for
> each data file you have.
>
> Fred
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On 15 Nov 2007, at 15:45, Bas van Westing wrote:
> Hi Fred,
>
> Thanks for your response. Can you also give the statement for rolling
> back the current database transaction?
>
  ActiveRecord::Base.connection.rollback_db_transaction
  ActiveRecord::Base.connection.begin_db_transaction

Fred
> Regards, Bas
>
> On Nov 14, 10:33 pm, Frederick Cheung
<frederick.che...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
> wrote:
>> On 14 Nov 2007, at 20:56, Bas van Westing wrote:
>>
>>
>>
>>> Hi,
>>
>>> I want to reset the fixture data manually during a single test. I  
>>> know
>>> this action is performed between tests, but I need to trigger it
>>> within a single test.
>>
>>> The problem is that the submitted files change the state of the
>>> application. I don''t want the tests to be dependent of
each other
>>> so I
>>> want to reset the fixture data after each iteration, but I
can''t
>>> find
>>> the method to do this.
>>
>>> Does anybody know how to reset the fixtures manually during a
single
>>> test?
>>
>> You need to rollback the current database transaction and start a new
>> one.
>> An alternative method would be to dynamically generate a testcase for
>> each data file you have.
>>
>> Fred

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Fred,

Thanks for your help. I ended up generating the test cases dynamically
as you suggested.
This gives nicer test outputs in case of failing test cases. Ruby is
so beautiful...

class DispatcherControllerTest < Test::Unit::TestCase

  Dir.glob( "#{File.dirname(__FILE__)}/../internal/*input.xml" ).each
do |input_filename|
    output_filename = input_filename.gsub( ''input.xml'',
''output.xml'')
    next unless File.exists?( output_filename )
    method_name = "test_internal_#{File.basename(input_filename,
''.xml'')}"
    define_method( method_name ) do
      ...Actual method contents here, comparing the response with the
expected output file.....
    end
  end

end

On Nov 15, 5:04 pm, Frederick Cheung
<frederick.che...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:
> On 15 Nov 2007, at 15:45,BasvanWestingwrote:
>
> > Hi Fred,
>
> > Thanks for your response. Can you also give the statement for rolling
> > back the current database transaction?
>
>   ActiveRecord::Base.connection.rollback_db_transaction
>   ActiveRecord::Base.connection.begin_db_transaction
>
> Fred
>
> > Regards,Bas
>
> > On Nov 14, 10:33 pm, Frederick Cheung
<frederick.che...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
> > wrote:
> >> On 14 Nov 2007, at 20:56,BasvanWestingwrote:
>
> >>> Hi,
>
> >>> I want to reset the fixture data manually during a single
test. I
> >>> know
> >>> this action is performed between tests, but I need to trigger
it
> >>> within a single test.
>
> >>> The problem is that the submitted files change the state of
the
> >>> application. I don''t want the tests to be dependent
of each other
> >>> so I
> >>> want to reset the fixture data after each iteration, but I
can''t
> >>> find
> >>> the method to do this.
>
> >>> Does anybody know how to reset the fixtures manually during a
single
> >>> test?
>
> >> You need to rollback the current database transaction and start a
new
> >> one.
> >> An alternative method would be to dynamically generate a testcase
for
> >> each data file you have.
>
> >> Fred
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