```ruby
require 'test_helper'

module FormForms
  class FormRegistryTest < ActionView::TestCase
    test "set, get, and delete registered form" do
      assert_nil FormRegistry['foo']
      assert_nil FormRegistry[:foo]

      form = Forms::Form.new{}
      FormRegistry['foo'] = form
      assert_equal FormRegistry['foo'], form
      assert_equal FormRegistry[:foo], form
      assert_includes FormRegistry.keys, 'foo'

      FormRegistry.delete('foo')
      assert_nil FormRegistry['foo']
      assert_nil FormRegistry[:foo]
    end
  end
end```

Fix assertion for Ruby 1.8 which doesn't ship MiniTest
user
```ruby
require 'test_helper'

module FormForms
  class FormRegistryTest < ActionView::TestCase
    test "set, get, and delete registered form" do
      assert_nil FormRegistry['foo']
      assert_nil FormRegistry[:foo]

      form = Forms::Form.new{}
      FormRegistry['foo'] = form
      assert_equal FormRegistry['foo'], form
      assert_equal FormRegistry[:foo], form
      assert FormRegistry.keys.include?('foo'), "Expected FormRegistry.keys to include 'foo'"

      FormRegistry.delete('foo')
      assert_nil FormRegistry['foo']
      assert_nil FormRegistry[:foo]
    end
  end
end```
assistant