rails--rails/activesupport/test/deprecation/method_wrappers_test.rb

require 'abstract_unit'
require 'active_support/deprecation'

class MethodWrappersTest < ActiveSupport::TestCase
  def setup
    @klass = Class.new do
      def new_method; "abc" end
      alias_method :old_method, :new_method
    end
  end

  def test_deprecate_methods_warning_default
    warning = /old_method is deprecated and will be removed from Rails \d.\d \(use new_method instead\)/
    ActiveSupport::Deprecation.deprecate_methods(@klass, :old_method => :new_method)

    assert_deprecated(warning) { assert_equal "abc", @klass.new.old_method }
  end

  def test_deprecate_methods_warning_with_optional_deprecator
    warning = /old_method is deprecated and will be removed from MyGem next-release \(use new_method instead\)/
    deprecator = ActiveSupport::Deprecation.new("next-release", "MyGem")
    ActiveSupport::Deprecation.deprecate_methods(@klass, :old_method => :new_method, :deprecator => deprecator)

    assert_deprecated(warning, deprecator) { assert_equal "abc", @klass.new.old_method }
  end

  def test_deprecate_methods_warning_when_deprecated_with_custom_deprecator
    warning = /old_method is deprecated and will be removed from MyGem next-release \(use new_method instead\)/
    deprecator = ActiveSupport::Deprecation.new("next-release", "MyGem")
    deprecator.deprecate_methods(@klass, :old_method => :new_method)

    assert_deprecated(warning, deprecator) { assert_equal "abc", @klass.new.old_method }
  end
end