How do you "nest" or "group" Test::Unit tests?

You can achieve something similar through classes. Probably someone will say this is horrible but it does allow you to separate tests within one file:

class MySuperTest < ActiveSupport::TestCase
  test "something general" do
    assert true
  end

  class MyMethodTests < ActiveSupport::TestCase

    setup do
      @variable = something
    end

    test "my method" do
      assert object.my_method
    end
  end
end

Test::Unit, to my knowledge, does not support test contexts. However, the gem contest adds support for context blocks.

Shoulda https://github.com/thoughtbot/shoulda although it looks like they've now made the context-related code into a separate gem: https://github.com/thoughtbot/shoulda-context