Continue code run after assert exception

ruby-talk
1

I am iterating through a collection and using Test::Unit assertations
on each object

   begin
     search.each {|@x|
     assert($ie.contains_text(@x)) }
   rescue => e
     puts "#{@x} does not exist in HTML"
   end

However, the problem is that if the first assertation is false, an
exception is thrown and my loop terminates. I would like to continue
the loop after an exception is thrown. I have tried 'retry', but I find
myself in an infinite loop.
   
Thanks
   
aidy

2

Hi --

I am iterating through a collection and using Test::Unit assertations
on each object

  begin
    search.each {|@x|
    assert($ie.contains_text(@x)) }
  rescue => e
    puts "#{@x} does not exist in HTML"
  end

However, the problem is that if the first assertation is false, an
exception is thrown and my loop terminates. I would like to continue
the loop after an exception is thrown. I have tried 'retry', but I find
myself in an infinite loop.

You can put the begin/rescue/end inside your loop, like this:

[1,2,3].each do |x|
   begin
     raise unless x == 2
   rescue
     puts "No! #{x}"
   end
end

Also, you might find the asserts_raises method useful. It lets you
predict that something will raise an exception. It probably wouldn't
be a good fit with the loop structure you're using, but you could
isolate some exception-raising tests and test them that way.

David

···

On Fri, 22 Sep 2006, aidy wrote:

--
                   David A. Black | dblack@wobblini.net
Author of "Ruby for Rails" [1] | Ruby/Rails training & consultancy [3]
DABlog (DAB's Weblog) [2] | Co-director, Ruby Central, Inc. [4]
[1] Ruby for Rails | [3] http://www.rubypowerandlight.com
[2] http://dablog.rubypal.com | [4] http://www.rubycentral.org

3

aidy schrieb:

I am iterating through a collection and using Test::Unit assertations
on each object

   begin
     search.each {|@x|
     assert($ie.contains_text(@x)) }
   rescue => e
     puts "#{@x} does not exist in HTML"
   end

However, the problem is that if the first assertation is false, an
exception is thrown and my loop terminates. I would like to continue
the loop after an exception is thrown. I have tried 'retry', but I find
myself in an infinite loop.

Aidy, are you using this code in a unit test, or are you using the assertions as part of your normal code? If this is normal code, see David's answer how to catch the error inside the loop.

If this is part of a unit test, and you want to report every false element, take a look at the code in

   http://blade.nagaokaut.ac.jp/cgi-bin/scat.rb/ruby/ruby-talk/138320

With this module, your test could look like:

   class MyTestCase < Test::Unit::TestCase

     include ErrorCollector

     def test_search_screen
       ...
       collecting_errors do
         search.each do |@x|
           assert($ie.contains_text(@x), "#{@x} does not exist in HTML")
         end
       end
     end

   end

Regards,
Pit