Howto invoke individual test for RubyOnRails 2.3.x

The snippet said it all:

cd project
ruby -I test/unit/product_test.rb

The code above would run all test cases of Product unit test. You can do the same for functional and other tests.
What if you only want to run a specific test case? Easy, you just specify the test name after -n flag

# unit/product_test.rb

test "true lies" do
  assert true

If you test has the test case ‘true lies’, the test name would be ‘true_lies’

cd project
ruby -I test/unit/product_test.rb -n test_true_lies

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