super_test.rb

require "test_helper"

module AnyWay
  def which_way
    "any way"
  end

  def way_with_args(one, two, &block)
    [one, two, block&.call].compact.inspect
  end

  def way_with_keyword_args(one:, two:, &block)
    [one, two, block&.call].compact.inspect
  end
end

module ThisWay
  include Casting::SuperDelegate
  def which_way
    "this way or #{super_delegate}"
  end

  def way_with_args(one, two, &block)
    [one, two, block&.call].compact.inspect
  end

  def way_with_keyword_args(one:, two:, &block)
    [one, two, block&.call].compact.inspect
  end

  def no_super
    super_delegate
  end
end

module ThatWay
  include Casting::SuperDelegate
  def which_way
    "#{super_delegate(ThatWay)} and that way!"
  end

  def way_with_args(one, two, &block)
    super_delegate(one, two, block&.call).compact
  end

  def way_with_keyword_args(one:, two:, &block)
    [one, two, block&.call].compact.inspect
  end
end

describe Casting, "modules using delegate_super" do
  it "call the method from the next delegate with the same arguments" do
    client = TestPerson.new.extend(Casting::Client)
    client.delegate_missing_methods
    client.cast_as(AnyWay, ThatWay, ThisWay)

    assert_equal "this way or any way and that way!", client.which_way
  end

  it "passes arguments" do
    client = TestPerson.new.extend(Casting::Client)
    client.delegate_missing_methods
    client.cast_as(ThatWay, ThisWay)

    assert_equal %(["first", "second", "block"]), client.way_with_args("first", "second") { "block" }
  end

  it "passes keyword arguments" do
    client = TestPerson.new.extend(Casting::Client)
    client.delegate_missing_methods
    client.cast_as(ThatWay, ThisWay)

    assert_equal %(["first", "second", "block"]), client.way_with_keyword_args(one: "first", two: "second") { "block" }
  end

  it "raises an error when method is not defined" do
    client = TestPerson.new.extend(Casting::Client)
    client.delegate_missing_methods
    client.cast_as(ThisWay)

    err = expect {
      client.no_super
    }.must_raise(NoMethodError)

    expect(err.message).must_match(/super_delegate: no delegate method `no_super' for \#<TestPerson:\dx[a-z0-9]*> from ThisWay/)
  end
end