ruby/rails newby needs help with passing parameters to testcases

I'm trying to pass parameters into a Selenium testcase using
Test::Unit:Testcase ... would I do this with a fixture or simply pass
parameters somehow into a class I create like:

myTest =, param2, param3)

Basically I want to write 1 test that will log into an application I
made as different users and validate the outcome. The parameters are
user name, password and database. I'm not really familiar with
fixtures (if that's what I should be using) or if I should be passing
parameters in a separate test suite file ... not sure. Any advice or
a website you could point me to I'd appreciate it.


My class is below__________________________________________

require 'test/unit'
require '../selenium'

class TC_LoginTest < Test::Unit::TestCase
  include SeleniumHelper

  def setup
    @selenium ="localhost", 4444,
"*iexplore", 10000);

  def teardown

  def test_doLogin
      #open the special test login page that doesn't need SSL (since
Se doesn't like SSL)
      type(name="UName", username)
      type(name="Pass", password)
      # after providing username and password we click the database
button we want to test and validate
      sleep 5
      assert_equal("nickc",get_text("userName"),["User name doesn't
match login name"])
      assert_equal("Developer",get_text("profileName"),["Profile name
doesn't match login name"])