dry-types inconsistent behavior with default & constructor

dry-types-default+constructor.rb

require "bundler/inline"

gemfile(true) do
  source "https://rubygems.org"

  gem 'dry-types',  github: "dry-rb/dry-types",  branch: 'master'
  gem 'dry-struct', github: "dry-rb/dry-struct", branch: 'master'
  gem 'rspec'
  gem 'timecop'
end

require 'dry-types'
require 'dry-struct'
require 'rspec/autorun'
require 'timecop'

module Types
  include Dry::Types.module
end

describe 'dry-types' do
  let(:time) { Time.iso8601('2001-02-03T04:05:06.123+00:00') }

  context 'value provided' do
    it 'runs it through constructor' do
      expect(Types::Form::Time
        .constructor { |t| t.round }
        .default { Time.now }[time]).to eq time.round
    end
  end

  context 'nil provided' do
    it 'ignores constructor' do
      pending 'broken'

      expect(Types::Form::Time
        .constructor { |t| t.round }
        .default { time }[nil]).to eq time.round
    end
  end
end

class Model < Dry::Struct
  constructor_type :schema

  attribute :attr, Types::Form::Time
    .constructor { |t| t.round }
    .default { Time.now }
end

describe 'default + constructor combination' do
  before do
    Timecop.freeze
  end

  after do
    Timecop.return
  end

  let(:time) { Time.iso8601('2001-02-03T04:05:06.123+00:00') }

  context 'value provided' do
    it 'runs it through constructor' do
      model = Model.new(attr: time)

      expect(model.attr).not_to eq time
      expect(model.attr).to eq time.round
    end
  end

  context 'value not provided' do
    it 'uses default and runs it through constructor' do
      model = Model.new()

      expect(model.attr).to eq Time.now.round
    end
  end

  # it could be OK not to run defaults through constructor, but it doesn't seem right to run them
  # through in one case and not in the other
  context 'nil provided' do
    it 'uses default, but does NOT run it through constructor' do
      pending 'broken'

      model = Model.new(attr: nil)

      expect(model.attr).to eq Time.now.round
    end
  end
end