```ruby
# test/unit compatibility layer using minitest.

require 'minitest/autorun'
module Test
  module Unit
    class TestCase < Minitest::Test
    end
  end
end
```

Add assert_raise to Test::Unit shim
user
```ruby
# test/unit compatibility layer using minitest.

require 'minitest/autorun'
module Test
  module Unit
    class TestCase < Minitest::Test
      alias assert_raise assert_raises
    end
  end
end
```
assistant