RSpec extension doesn't work in namespaced specs

[tylerhunt]

Describe the bug

When writing specs inside a module, the lookup of monad constants fails.

To Reproduce

require 'dry/monads'

Dry::Monads.load_extensions :rspec

module Namespace
  RSpec.describe Object do
    specify do
      expect(Failure[:invalid]).to be_failure
    end
  end
end

Fails with:

     NameError:
       uninitialized constant Namespace::Failure

Expected behavior

Passing specs.

[tylerhunt]

This also fails:

module Namespace
  RSpec.describe Object do
    include Dry::Monads[:result]

    specify do
      expect(Failure[:invalid]).to be_failure
    end
  end
end

Although writing the expectation as expect(Failure([:invalid])).to be_failure works.

[flash-gordon]

It is expected, if you have your namespace you can just use with Namespace.include[:result] somewhere or with

module Namespace
  include Dry::Monads[:result]

in a spec file.

[flash-gordon]

I'll do take a look though at the exact mechanism why it's failing, without looking at the code I'm not sure why this happens.

[tylerhunt]

Including in the namespace works, but it requires two includes when using both Failure(:invalid) and Failure[:invalid].

module Namespace
  include Dry::Monads[:result] # without this: uninitialized constant Namespace::Failure

  RSpec.describe Object do
    include Dry::Monads[:result] # without this: undefined method 'Failure'

    specify { expect(Failure[:invalid]).to be_failure }
    specify { expect(Failure(:invalid)).to be_failure }
  end
end