Rails - Jan 2006 - Testing ''create'' from multipart/form-data submission

good morning forum! :)

i''m looking to test the creation of a record from the submission of a 
form with content-type="multipart/form-data" (uploading an image into
a
BLOB field), currently i''m using a small binary string to simulate this
but for thoroughness i want to provide the test with a path to an image 
on my filesystem and have it populate the db correctly...any idea what 
the syntax for posting a form this way is?? (current code below)

  def test_create
    num_images = Image.count

    post(:create,
    	{:image => {
             ''item_id'' => 203,
    	     ''primary_image'' => 0,
             ''data_orig'' => ''01010101'',
    	     ''data_medium'' => ''01010101'',
    	     ''data_thumb'' => ''01010101'',
    	     ''content_type'' => ''image/jpg'',
    	     ''comment'' => ''this is a
comment''}})

    assert_response( :redirect )
    assert_redirected_to :action => ''list''
    assert_equal num_images + 1, Image.count
  end

many thanks, Marcus

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