ruby--ruby/spec/ruby/language/delegation_spec.rb

require_relative '../spec_helper'
require_relative 'fixtures/delegation'

describe "delegation with def(...)" do
  it "delegates rest and kwargs" do
    a = Class.new(DelegationSpecs::Target)
    a.class_eval(<<-RUBY)
      def delegate(...)
        target(...)
      end
    RUBY

    a.new.delegate(1, b: 2).should == [[1], {b: 2}]
  end

  it "delegates block" do
    a = Class.new(DelegationSpecs::Target)
    a.class_eval(<<-RUBY)
      def delegate_block(...)
        target_block(...)
      end
    RUBY

    a.new.delegate_block(1, b: 2) { |x| x }.should == [{b: 2}, [1]]
  end

  it "parses as open endless Range when brackets are omitted" do
    a = Class.new(DelegationSpecs::Target)
    suppress_warning do
      a.class_eval(<<-RUBY)
        def delegate(...)
          target ...
        end
       RUBY
     end

     a.new.delegate(1, b: 2).should == Range.new([[], {}], nil, true)
  end
end

ruby_version_is "2.7.3" do
  describe "delegation with def(x, ...)" do
    it "delegates rest and kwargs" do
      a = Class.new(DelegationSpecs::Target)
      a.class_eval(<<-RUBY)
        def delegate(x, ...)
          target(...)
        end
      RUBY

      a.new.delegate(0, 1, b: 2).should == [[1], {b: 2}]
    end

    it "delegates block" do
      a = Class.new(DelegationSpecs::Target)
      a.class_eval(<<-RUBY)
        def delegate_block(x, ...)
          target_block(...)
        end
      RUBY

      a.new.delegate_block(0, 1, b: 2) { |x| x }.should == [{b: 2}, [1]]
    end
  end
end