activemodel/test/cases/model_test.rb


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require 'cases/helper'

class ModelTest < ActiveModel::TestCase
  include ActiveModel::Lint::Tests

  module DefaultValue
    def initialize(*args)
      @attr ||= 'default value'
    end
  end

  class BasicModel
    include DefaultValue
    include ActiveModel::Model
    attr_accessor :attr
  end

  def setup
    @model = BasicModel.new
  end

  def test_initialize_with_params
    object = BasicModel.new(attr: "value")
    assert_equal object.attr, "value"
  end

  def test_initialize_with_nil_or_empty_hash_params_does_not_explode
    assert_nothing_raised do
      BasicModel.new()
      BasicModel.new nil
      BasicModel.new({})
    end
  end

  def test_persisted_is_always_false
    object = BasicModel.new(attr: "value")
    assert object.persisted? == false
  end

  def test_mixin_inclusion_chain
    object = BasicModel.new
    assert_equal object.attr, 'default value'
  end
end