rails--rails/actionmailer/test/test_case_test.rb

require 'abstract_unit'

class TestTestMailer < ActionMailer::Base
end

class CrazyNameMailerTest < ActionMailer::TestCase
  tests TestTestMailer

  def test_set_mailer_class_manual
    assert_equal TestTestMailer, self.class.mailer_class
  end
end

class CrazySymbolNameMailerTest < ActionMailer::TestCase
  tests :test_test_mailer

  def test_set_mailer_class_manual_using_symbol
    assert_equal TestTestMailer, self.class.mailer_class
  end
end

class CrazyStringNameMailerTest < ActionMailer::TestCase
  tests 'test_test_mailer'

  def test_set_mailer_class_manual_using_string
    assert_equal TestTestMailer, self.class.mailer_class
  end
end