coercion_test.rb

# frozen_string_literal: true

require "test_helper"
require "representable/coercion"

class CoercionTest < MiniTest::Spec
  representer! do
    include Representable::Coercion

    property :title # no coercion.
    property :length, type: Representable::Coercion::Types::Params::Float

    property :band, class: OpenStruct do
      property :founded, type: Representable::Coercion::Types::Params::Integer
    end

    collection :songs, class: OpenStruct do
      property :ok, type: Representable::Coercion::Types::Params::Bool
    end
  end

  let(:album) do
    OpenStruct.new(
      title: "Dire Straits", length: 41.34,
      band: OpenStruct.new(founded: "1977"),
      songs: [OpenStruct.new(ok: 1), OpenStruct.new(ok: 0)]
    )
  end

  it do
    _(album.extend(representer).to_hash).must_equal(
      {
        "title" => "Dire Straits",
        "length" => 41.34,
        "band" => {"founded" => 1977},
        "songs" => [{"ok" => true}, {"ok" => false}]
      }
    )
  end

  it {
    album = OpenStruct.new
    album.extend(representer)
    album.from_hash(
      {
        "title" => "Dire Straits",
        "length" => "41.34",
        "band" => {"founded" => "1977"},
        "songs" => [{"ok" => 1}, {"ok" => 0}]
      }
    )

    # it
    _(album.length).must_equal 41.34
    _(album.band.founded).must_equal 1977
    _(album.songs[0].ok).must_equal true
  }

  describe "with user :parse_filter and :render_filter" do
    representer! do
      include Representable::Coercion

      property :length, type: Representable::Coercion::Types::Params::Float,
                        parse_filter: ->(input, _options) { "#{input}.1" }, # happens BEFORE coercer.
                        render_filter: ->(fragment, *) { "#{fragment}.1" }
    end

    # user's :parse_filter(s) are run before coercion.
    it { _(OpenStruct.new.extend(representer).from_hash("length" => "1").length).must_equal 1.1 }
    # user's :render_filter(s) are run before coercion.
    it { _(OpenStruct.new(length: 1).extend(representer).to_hash).must_equal({"length" => 1.1}) }
  end
end