candidates_test.rb

require "helper"

class CandidatesTest < MiniTest::Unit::TestCase

  include FriendlyId::Test

  class City < ActiveRecord::Base
    extend FriendlyId
    friendly_id :slug_candidates, use: :slugged
  end

  def model_class
    City
  end

  def with_instances_of(klass, &block)
    transaction do
      city1 = klass.create! :name => "New York", :code => "JFK"
      city2 = klass.create! :name => "New York", :code => "EWR"
      yield city1, city2
    end
  end

  test "accepts multiple candidates" do
    klass = Class.new model_class do
      def slug_candidates
        [:name, :code]
      end
    end
    with_instances_of(klass) do |_, city|
      assert_equal "ewr", city.slug
    end
  end

  test "ignores blank candidate" do
    klass = Class.new model_class do
      def slug_candidates
        [:name, ""]
      end
    end
    with_instances_of(klass) do |_, city|
      assert_match(/\Anew-york-([a-z0-9]+\-){4}[a-z0-9]+\z/, city.slug)
    end
  end

  test "ignores nil candidate" do
    klass = Class.new model_class do
      def slug_candidates
        [:name, nil]
      end
    end
    with_instances_of(klass) do |_, city|
      assert_match(/\Anew-york-([a-z0-9]+\-){4}[a-z0-9]+\z/, city.slug)
    end
  end

  test "accepts candidate with nested array" do
    klass = Class.new model_class do
      def slug_candidates
        [:name, [:name, :code]]
      end
    end
    with_instances_of(klass) do |_, city|
      assert_equal "new-york-ewr", city.slug
    end
  end

  test "accepts candidate with lambda" do
    klass = Class.new City do
      def slug_candidates
        [:name, [:name, ->{ rand 1000 }]]
      end
    end
    with_instances_of(klass) do |_, city|
      assert_match(/\Anew-york-\d+\z/, city.friendly_id)
    end
  end

  test "accepts candidate with object" do
    klass = Class.new City do
      class A
        alias_method :to_s, :object_id
      end
      def slug_candidates
        [:name, [:name, A.new]]
      end
    end
    with_instances_of(klass) do |_, city|
      assert_match(/\Anew-york-\d+\z/, city.friendly_id)
    end
  end

end