Rails - Jun 2006 - @response.body accumulating in functional tests?

I have two functional tests for my user controller:

   def test_bad_registration
     post :register, :email => "tester1@foo.com"
     assert_response :success
     assert_not_nil @response.body =~ /^\<error/
     assert_nil assigns[''user'']
   end

   def test_good_registration
     @response.body = nil
     post :register, :username => "tester",
       :name => "Tester",
       :password => "test",
       :email => "tester@foo.com"
     assert_not_nil assigns[''user'']
     assert_response :success
     breakpoint
     puts "match: #{@response.body =~ /^\<user/}"
     puts "body: #{@response.body}"
   end

I render xml from each like this "render :xml => ...".

The first test goes through but the second one shows both the output  
of the first and second test in @response.body (below). It does not  
happen when the first test is commented out.

<error>
   <message>Validation failed: Name can''t be blank, Username
can''t be
blank, Password can''t be blank</message>
</error>
<user>
   <userid>31</userid>
   <name>Tester</name>
   <username>tester</username>
</user>

Am I doing something wrong? Is there a better way to check rendered XML?

	Thanks, Joel

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